First local commit

41 files changed, 7368 insertions, 0 deletions

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..e46d8c5
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,157 @@
+PRG            = intercom
+OBJ            = intercom.o ff.o diskio.o rtc.o clunet.o sound.o transfer.o
+#LFUSE          = E4
+#LFUSE          = FF
+#HFUSE          = D9
+#MCU_PROGRAMMER = m8
+
+CLUNET_FLASHER = D:/Soft/Soft/ClunetFlasher/clunetflasher.exe
+//CLUNET_IP      = 127.0.0.1
+CLUNET_IP      = 10.13.0.254
+CLUNET_PORT    = 10009
+CLUNET_DEVICE_ID = 7
+
+#MCU_TARGET     = at90s2313
+#MCU_TARGET     = at90s2333
+#MCU_TARGET     = at90s4414
+#MCU_TARGET     = at90s4433
+#MCU_TARGET     = at90s4434
+#MCU_TARGET     = at90s8515
+#MCU_TARGET     = at90s8535
+#MCU_TARGET     = atmega128
+#MCU_TARGET     = atmega1280
+#MCU_TARGET     = atmega1281
+#MCU_TARGET     = atmega16
+#MCU_TARGET     = atmega163
+#MCU_TARGET     = atmega164p
+#MCU_TARGET     = atmega165
+#MCU_TARGET     = atmega165p
+#MCU_TARGET     = atmega168
+#MCU_TARGET     = atmega169
+#MCU_TARGET     = atmega169p
+#MCU_TARGET     = atmega32
+#MCU_TARGET     = atmega324p
+#MCU_TARGET     = atmega325
+#MCU_TARGET     = atmega3250
+#MCU_TARGET     = atmega329
+#MCU_TARGET     = atmega3290
+#MCU_TARGET     = atmega48
+MCU_TARGET     = atmega64
+#MCU_TARGET     = atmega640
+#MCU_TARGET     = atmega644
+#MCU_TARGET     = atmega644p
+#MCU_TARGET     = atmega645
+#MCU_TARGET     = atmega6450
+#MCU_TARGET     = atmega649
+#MCU_TARGET     = atmega6490
+#MCU_TARGET     = atmega16
+#MCU_TARGET     = atmega8515
+#MCU_TARGET     = atmega8535
+#MCU_TARGET     = atmega88
+#MCU_TARGET     = attiny2313
+#MCU_TARGET     = attiny24
+#MCU_TARGET     = attiny25
+#MCU_TARGET     = attiny26
+#MCU_TARGET     = attiny261
+#MCU_TARGET     = attiny44
+#MCU_TARGET     = attiny45
+#MCU_TARGET     = attiny461
+#MCU_TARGET     = attiny84
+#MCU_TARGET     = attiny85
+#MCU_TARGET     = attiny861
+OPTIMIZE       = -O2
+
+DEFS           =
+LIBS           =
+
+# You should not have to change anything below here.
+
+CC             = avr-gcc
+
+# Override is only needed by avr-lib build system.
+
+override CFLAGS        = -g -Wall $(OPTIMIZE) -mmcu=$(MCU_TARGET) $(DEFS)
+override LDFLAGS       = -Wl,-Map,$(PRG).map
+
+OBJCOPY        = avr-objcopy
+OBJDUMP        = avr-objdump
+
+all: $(PRG).elf lst text eeprom
+
+$(PRG).elf: $(OBJ)
+	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^ $(LIBS)
+
+# dependency:
+demo.o: demo.c
+
+clean:
+	rm -rf *.o $(PRG).elf *.eps *.png *.pdf *.bak 
+	rm -rf *.lst *.map $(EXTRA_CLEAN_FILES)
+
+lst:  $(PRG).lst
+
+%.lst: %.elf
+	$(OBJDUMP) -h -S $< > $@
+
+# Rules for building the .text rom images
+
+text: hex bin srec
+
+hex:  $(PRG).hex
+bin:  $(PRG).bin
+srec: $(PRG).srec
+
+%.hex: %.elf
+	$(OBJCOPY) -j .text -j .data -O ihex $< $@
+
+%.srec: %.elf
+	$(OBJCOPY) -j .text -j .data -O srec $< $@
+
+%.bin: %.elf
+	$(OBJCOPY) -j .text -j .data -O binary $< $@
+
+# Rules for building the .eeprom rom images
+
+eeprom: ehex ebin esrec
+
+ehex:  $(PRG)_eeprom.hex
+ebin:  $(PRG)_eeprom.bin
+esrec: $(PRG)_eeprom.srec
+
+%_eeprom.hex: %.elf
+	$(OBJCOPY) -j .eeprom --change-section-lma .eeprom=0 -O ihex $< $@ \
+	|| { echo empty $@ not generated; exit 0; }
+
+%_eeprom.srec: %.elf
+	$(OBJCOPY) -j .eeprom --change-section-lma .eeprom=0 -O srec $< $@ \
+	|| { echo empty $@ not generated; exit 0; }
+
+%_eeprom.bin: %.elf
+	$(OBJCOPY) -j .eeprom --change-section-lma .eeprom=0 -O binary $< $@ \
+	|| { echo empty $@ not generated; exit 0; }
+
+# Every thing below here is used by avr-libc's build system and can be ignored
+# by the casual user.
+
+FIG2DEV                 = fig2dev
+EXTRA_CLEAN_FILES       = *.hex *.bin *.srec
+
+dox: eps png pdf
+
+eps: $(PRG).eps
+png: $(PRG).png
+pdf: $(PRG).pdf
+
+%.eps: %.fig
+	$(FIG2DEV) -L eps $< $@
+
+%.pdf: %.fig
+	$(FIG2DEV) -L pdf $< $@
+
+%.png: %.fig
+	$(FIG2DEV) -L png $< $@
+
+program: hex
+	$(CLUNET_FLASHER) $(CLUNET_IP) $(CLUNET_PORT) $(CLUNET_DEVICE_ID) $(PRG).hex
+#	avrdude -V -p $(MCU_PROGRAMMER) -c avrisp2 -P usb -U flash:w:$(PRG).hex -U lfuse:w:0x$(LFUSE):m -U hfuse:w:0x$(HFUSE):m
+
diff --git a/bits.h b/bits.h
new file mode 100644
index 0000000..55a99aa
--- /dev/null
+++ b/bits.h
@@ -0,0 +1,10 @@
+#define set(reg,value) reg |= (value)
+#define unset(reg,value) reg &= ~(value)
+#define set_bit(reg,value) reg |= (_BV(value))
+#define set_bit2(reg,value1,value2) reg |= (_BV(value1) | _BV(value2))
+#define set_bit3(reg,value1,value2,value3) reg |= (_BV(value1) | _BV(value2) | _BV(value3))
+#define set_bit4(reg,value1,value2,value3,value4) reg |= (_BV(value1) | _BV(value2) | _BV(value3) | _BV(value4))
+#define unset_bit(reg,value) reg &= ~(_BV(value))
+#define unset_bit2(reg,value1,value2) reg &= ~(_BV(value1) | _BV(value2))
+#define unset_bit3(reg,value1,value2,value3) reg &= ~(_BV(value1) | _BV(value2) | _BV(value3))
+#define unset_bit4(reg,value1,value2,value3,value4) reg &= ~(_BV(value1) | _BV(value2) | _BV(value3) | _BV(value4))
diff --git a/clunet.c b/clunet.c
new file mode 100644
index 0000000..3288fd9
--- /dev/null
+++ b/clunet.c
@@ -0,0 +1,314 @@
+/* Name: clunet.c
+ * Project: CLUNET network driver
+ * Author: Alexey Avdyukhin
+ * Creation Date: 2013-07-22
+ * License: DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+ */
+
+
+#include "defines.h"
+#include "clunet_config.h"
+#include "bits.h"
+#include "clunet.h"
+#include <avr/io.h>
+#include <avr/interrupt.h>
+
+void (*on_data_received)(unsigned char src_address, unsigned char dst_address, unsigned char command, char* data, unsigned char size) = 0;
+void (*on_data_received_sniff)(unsigned char src_address, unsigned char dst_address, unsigned char command, char* data, unsigned char size) = 0;
+
+volatile unsigned char clunetSendingState = CLUNET_SENDING_STATE_IDLE;
+volatile unsigned short int clunetSendingDataLength;
+volatile unsigned char clunetSendingCurrentByte;
+volatile unsigned char clunetSendingCurrentBit;
+volatile unsigned char clunetReadingState = CLUNET_READING_STATE_IDLE;
+volatile unsigned char clunetReadingCurrentByte;
+volatile unsigned char clunetReadingCurrentBit;
+volatile unsigned char clunetCurrentPrio;
+
+volatile unsigned char clunetReceivingState = 0;
+volatile unsigned char clunetReceivingPrio = 0;
+volatile unsigned char clunetTimerStart = 0;
+volatile unsigned char clunetTimerPeriods = 0;
+
+volatile char dataToSend[CLUNET_SEND_BUFFER_SIZE];
+volatile char dataToRead[CLUNET_READ_BUFFER_SIZE];
+
+char check_crc(char* data, unsigned char size)
+{
+      uint8_t crc=0;
+      uint8_t i,j;
+      for (i=0; i<size;i++) 
+      {
+            uint8_t inbyte = data[i];
+            for (j=0;j<8;j++) 
+            {
+                  uint8_t mix = (crc ^ inbyte) & 0x01;
+                  crc >>= 1;
+                  if (mix) 
+                        crc ^= 0x8C;
+                  
+                  inbyte >>= 1;
+            }
+      }
+      return crc;
+}
+
+ISR(CLUNET_TIMER_COMP_VECTOR)
+{		
+	unsigned char now = CLUNET_TIMER_REG;     // Çàïîìèíàåì òåêóùåå âðåìÿ
+	
+	switch (clunetSendingState)
+	{
+		case CLUNET_SENDING_STATE_PREINIT: // Íóæíî ïîäîæäàòü ïåðåä îòïðàâêîé
+			CLUNET_TIMER_REG_OCR = now + CLUNET_T;	
+			clunetSendingState = CLUNET_SENDING_STATE_INIT;  // Íà÷èíàåì ñëåäóþùóþ ôàçó
+			return;	
+		case CLUNET_SENDING_STATE_STOP:	// Çàâåðøåíèå ïåðåäà÷è, íî íàäî åù¸ ïîäîæäàòü
+			CLUNET_SEND_0;				// Îòïóñêàåì ëèíèþ
+			CLUNET_TIMER_REG_OCR = now + CLUNET_T;
+			clunetSendingState = CLUNET_SENDING_STATE_DONE;
+			return;
+		case CLUNET_SENDING_STATE_DONE:	// Çàâåðøåíèå ïåðåäà÷è
+			CLUNET_DISABLE_TIMER_COMP; // Âûêëþ÷àåì òàéìåð-ñðàâíåíèå
+			clunetSendingState = CLUNET_SENDING_STATE_IDLE; // Ñòàâèì ôëàã, ÷òî ïåðåäàò÷èê ñâîáîäåí
+			return;		
+	}	
+
+	if (/*!((clunetReadingState == CLUNET_READING_STATE_DATA) && // Åñëè ìû ñåé÷àñ íå [ïîëó÷àåì äàííûå
+		(clunetCurrentPrio > clunetReceivingPrio) 				// È ïðèîðèòåò ïîëó÷àåìûõ äàííûõ íå íèæå
+		&& (clunetSendingState == CLUNET_SENDING_STATE_INIT))  // È ìû íå ïûòàåìñÿ íà÷àòü èíèöèàëèçàöèþ]		
+		&&*/ (!CLUNET_SENDING && CLUNET_READING)) // Òî èä¸ò ïðîâåðêà íà êîíôëèêò. Åñëè ìû ëèíèþ íå äåðæèì, íî îíà óæå çàíÿòà
+	{
+		CLUNET_DISABLE_TIMER_COMP; // Âûêëþ÷àåì òàéìåð-ñðàâíåíèå
+		clunetSendingState = CLUNET_SENDING_STATE_WAITING_LINE; // Ïåðåõîäèì â ðåæèì îæèäàíèÿ ëèíèè
+		return;											 // È óìîëêàåì
+	}
+
+	CLUNET_SEND_INVERT;	 // Ñðàçó èíâðòèðóåì çíà÷åíèå ñèãíàëà, ó íàñ ýòî çàïëàíèðîâàíî
+	
+	if (!CLUNET_SENDING)        // Åñëè ìû îòïóñòèëè ëèíèþ...
+	{
+		CLUNET_TIMER_REG_OCR = now + CLUNET_T; // Òî âåðí¸ìñÿ â ýòî ïðåðûâàíèå ÷åðåç CLUNET_T åäèíèö âðåìåíè
+		return;
+	}
+	switch (clunetSendingState)
+	{
+		case CLUNET_SENDING_STATE_INIT: // Èíèöèàëèçàöèÿ
+			CLUNET_TIMER_REG_OCR = now + CLUNET_INIT_T;	
+			clunetSendingState = CLUNET_SENDING_STATE_PRIO1;  // Íà÷èíàåì ñëåäóþùóþ ôàçó
+			return;
+		case CLUNET_SENDING_STATE_PRIO1: // Ôàçà ïåðåäà÷è ïðèîðèòåòà, ñòàðøèé áèò
+			if ((clunetCurrentPrio-1) & 2) // Åñëè 1, òî æä¸ì 3T, à åñëè 0, òî 1T
+				CLUNET_TIMER_REG_OCR = now + CLUNET_1_T;
+			else CLUNET_TIMER_REG_OCR = now + CLUNET_0_T;	
+			clunetSendingState = CLUNET_SENDING_STATE_PRIO2;
+			return;
+		case CLUNET_SENDING_STATE_PRIO2: // Ôàçà ïåðåäà÷è ïðèîðèòåòà, ìëàäøèé áèò
+			if ((clunetCurrentPrio-1) & 1) // Åñëè 1, òî æä¸ì 3T, à åñëè 0, òî 1T
+				CLUNET_TIMER_REG_OCR = now + CLUNET_1_T;
+			else CLUNET_TIMER_REG_OCR = now + CLUNET_0_T;	
+			clunetSendingState = CLUNET_SENDING_STATE_DATA;
+			return;
+		case CLUNET_SENDING_STATE_DATA: // Ôàçà ïåðåäà÷è äàííûõ
+			if (dataToSend[clunetSendingCurrentByte] & (1 << clunetSendingCurrentBit)) // Åñëè 1, òî æä¸ì 3T, à åñëè 0, òî 1T
+				CLUNET_TIMER_REG_OCR = now + CLUNET_1_T;
+			else CLUNET_TIMER_REG_OCR = now + CLUNET_0_T;
+			clunetSendingCurrentBit++; // Ïåðåõîäèì ê ñëåäóþùåìó áèòó
+			if (clunetSendingCurrentBit >= 8)
+			{
+				clunetSendingCurrentBit = 0;
+				clunetSendingCurrentByte++;
+			}
+			if (clunetSendingCurrentByte >= clunetSendingDataLength) // Äàííûå çàêîí÷èëèñü
+			{
+				clunetSendingState = CLUNET_SENDING_STATE_STOP; // Ñëåäóþùàÿ ôàçà
+			}
+			return;
+	}
+}
+
+
+void clunet_start_send()
+{
+	CLUNET_SEND_0;
+	if (clunetSendingState != CLUNET_SENDING_STATE_PREINIT) // Åñëè íå íóæíà ïàóçà...
+		clunetSendingState = CLUNET_SENDING_STATE_INIT; // Èíèöèàëèçàöèÿ ïåðåäà÷è
+	clunetSendingCurrentByte = clunetSendingCurrentBit = 0; // Îáíóëÿåì ñ÷¸ò÷èê
+	CLUNET_TIMER_REG_OCR = CLUNET_TIMER_REG+CLUNET_T;			// Ïëàíèðóåì òàéìåð, îáû÷íî ïî÷åìó-òî ïðåðûâàíèå ñðàáàòûâàåò ñðàçó
+	CLUNET_ENABLE_TIMER_COMP;			// Âêëþ÷àåì ïðåðûâàíèå òàéìåðà-ñðàâíåíèÿ
+}
+
+void clunet_send(unsigned char address, unsigned char prio, unsigned char command, char* data, unsigned char size)
+{
+	if (CLUNET_OFFSET_DATA+size+1 > CLUNET_SEND_BUFFER_SIZE) return; // Íå õâàòàåò áóôåðà
+	CLUNET_DISABLE_TIMER_COMP;CLUNET_SEND_0; // Ïðåðûâàåì òåêóùóþ ïåðåäà÷ó, åñëè åñòü òàêàÿ
+	// Çàïîëíÿåì ïåðåìåííûå
+	if (clunetSendingState != CLUNET_SENDING_STATE_PREINIT)
+		clunetSendingState = CLUNET_SENDING_STATE_IDLE;
+	clunetCurrentPrio = prio;
+	dataToSend[CLUNET_OFFSET_SRC_ADDRESS] = CLUNET_DEVICE_ID;
+	dataToSend[CLUNET_OFFSET_DST_ADDRESS] = address;
+	dataToSend[CLUNET_OFFSET_COMMAND] = command;
+	dataToSend[CLUNET_OFFSET_SIZE] = size;
+	unsigned char i;
+	for (i = 0; i < size; i++)	
+		dataToSend[CLUNET_OFFSET_DATA+i] = data[i];
+	dataToSend[CLUNET_OFFSET_DATA+size] = check_crc((char*)dataToSend, CLUNET_OFFSET_DATA+size);
+	clunetSendingDataLength = CLUNET_OFFSET_DATA + size + 1;
+	if (
+		(clunetReadingState == CLUNET_READING_STATE_IDLE) // Åñëè ìû íè÷åãî íå ïîëó÷àåì â äàííûé ìîìåíò, òî ïîñûëàåì ñðàçó		
+//		|| ((clunetReadingState == CLUNET_READING_STATE_DATA) && (prio > clunetReceivingPrio)) // Ëèáî åñëè ïîëó÷àåì, íî ñ áîëåå íèçêèì ïðèîðèòåòîì
+		)
+		clunet_start_send(); // Çàïóñêàåì ïåðåäà÷ó ñðàçó
+	else clunetSendingState = CLUNET_SENDING_STATE_WAITING_LINE; // Èíà÷å æä¸ì ëèíèþ
+}
+
+inline void clunet_data_received(unsigned char src_address, unsigned char dst_address, unsigned char command, char* data, unsigned char size)
+{	
+	if (on_data_received_sniff)
+		(*on_data_received_sniff)(src_address, dst_address, command, data, size);
+
+	if (src_address == CLUNET_DEVICE_ID) return; // Èãíîðèðóåì ñîîáùåíèÿ îò ñàìîãî ñåáÿ!
+
+	if ((dst_address != CLUNET_DEVICE_ID) &&
+		(dst_address != CLUNET_BROADCAST_ADDRESS)) return; // Èãíîðèðóåì ñîîáùåíèÿ íå äëÿ íàñ					
+
+	if (command == CLUNET_COMMAND_REBOOT) // Ïðîñòî ðåáóò. È äà, ðåáóòíóòü ñåáÿ ìû ìîæåì
+	{
+		cli();
+		set_bit(WDTCR, WDE);
+		while(1);
+	}
+
+	if ((clunetSendingState == CLUNET_SENDING_STATE_IDLE) || (clunetCurrentPrio <= CLUNET_PRIORITY_MESSAGE))
+	{
+		if (command == CLUNET_COMMAND_DISCOVERY) // Îòâåò íà ïîèñê óñòðîéñòâ
+		{
+			char buf[] = CLUNET_DEVICE_NAME;
+			int len = 0; while(buf[len]) len++;
+			clunetSendingState = CLUNET_SENDING_STATE_PREINIT;
+			clunet_send(src_address, CLUNET_PRIORITY_MESSAGE, CLUNET_COMMAND_DISCOVERY_RESPONSE, buf, len);
+		}
+		else if (command == CLUNET_COMMAND_PING) // Îòâåò íà ïèíã
+		{
+			clunetSendingState = CLUNET_SENDING_STATE_PREINIT;
+			clunet_send(src_address, CLUNET_PRIORITY_COMMAND, CLUNET_COMMAND_PING_REPLY, data, size);
+		}
+	}
+	
+	if (on_data_received)
+		(*on_data_received)(src_address, dst_address, command, data, size);
+		
+	if ((clunetSendingState == CLUNET_SENDING_STATE_WAITING_LINE) && !CLUNET_READING) // Åñëè åñòü íåîòîñëàííûå äàííûå, øë¸ì, ëèíèÿ îñâîáîäèëàñü
+	{
+		clunetSendingState = CLUNET_SENDING_STATE_PREINIT;
+		clunet_start_send();		
+	}
+}
+
+ISR(CLUNET_TIMER_OVF_VECTOR)
+{		
+	if (clunetTimerPeriods < 3)
+		clunetTimerPeriods++;
+	else // Ñëèøêîì äîëãî íåò ñèãíàëà, ñáðîñ è îòêëþ÷åíèå ïðåðûâàíèÿ
+	{
+		CLUNET_SEND_0; 					// À âäðóã ìû çàáûëè ëèíèþ îòæàòü? Õîòÿ ïî èäåå íå äîëæíî...
+		clunetReadingState = CLUNET_READING_STATE_IDLE;
+		if ((clunetSendingState == CLUNET_SENDING_STATE_IDLE) && (!CLUNET_READING))
+			CLUNET_DISABLE_TIMER_OVF;
+		if ((clunetSendingState == CLUNET_SENDING_STATE_WAITING_LINE) && (!CLUNET_READING)) // Åñëè åñòü íåîòîñëàííûå äàííûå, øë¸ì, ëèíèÿ îñâîáîäèëàñü
+			clunet_start_send();
+	}
+}
+
+
+ISR(CLUNET_INT_VECTOR)
+{
+	unsigned char time = (unsigned char)((CLUNET_TIMER_REG-clunetTimerStart) & 0xFF);
+	if (!CLUNET_READING) // Ëèíèþ îòïóñòèëî
+	{
+		CLUNET_ENABLE_TIMER_OVF;
+		if (time >= (CLUNET_INIT_T+CLUNET_1_T)/2) // Åñëè êòî-òî äîëãî æì¸ò ëèíèþ, ýòî èíèöèàëèçàöèÿ
+		{
+			clunetReadingState = CLUNET_READING_STATE_PRIO1;
+		}
+		else switch (clunetReadingState) // À åñëè íå äîëãî, òî ñìîòðèì íà ýòàï
+		{
+			case CLUNET_READING_STATE_PRIO1:    // Ïîëó÷åíèå ïðèîðèòåòà, êëèåíòó îí íå íóæåí
+				if (time > (CLUNET_0_T+CLUNET_1_T)/2)
+					clunetReceivingPrio = 3;
+					else clunetReceivingPrio = 1;
+				clunetReadingState = CLUNET_READING_STATE_PRIO2;
+				break;
+			case CLUNET_READING_STATE_PRIO2:	 // Ïîëó÷åíèå ïðèîðèòåòà, êëèåíòó îí íå íóæåí
+				if (time > (CLUNET_0_T+CLUNET_1_T)/2)
+					clunetReceivingPrio++;
+				clunetReadingState = CLUNET_READING_STATE_DATA;
+				clunetReadingCurrentByte = 0;
+				clunetReadingCurrentBit = 0;
+				dataToRead[0] = 0;
+				break;
+			case CLUNET_READING_STATE_DATA:    // ×òåíèå âñåõ äàííûõ
+				if (time > (CLUNET_0_T+CLUNET_1_T)/2)
+					dataToRead[clunetReadingCurrentByte] |= (1 << clunetReadingCurrentBit);
+				clunetReadingCurrentBit++;
+				if (clunetReadingCurrentBit >= 8)  // Ïåðåõîäèì ê ñëåäóþùåìó áàéòó
+				{
+					clunetReadingCurrentByte++;
+					clunetReadingCurrentBit = 0;
+					if (clunetReadingCurrentByte < CLUNET_READ_BUFFER_SIZE)
+						dataToRead[clunetReadingCurrentByte] = 0;
+					else // Åñëè áóôåð çàêîí÷èëñÿ
+					{
+						clunetReadingState = CLUNET_READING_STATE_IDLE;
+						return;
+					}
+				}				
+				if ((clunetReadingCurrentByte > CLUNET_OFFSET_SIZE) && (clunetReadingCurrentByte > dataToRead[CLUNET_OFFSET_SIZE]+CLUNET_OFFSET_DATA))
+				{
+					// Ïîëó÷èëè äàííûå ïîëíîñòüþ, óðà!
+					clunetReadingState = CLUNET_READING_STATE_IDLE;
+					char crc = check_crc((char*)dataToRead,clunetReadingCurrentByte); // Ïðîâåðÿåì CRC
+					if (crc == 0)
+						clunet_data_received(dataToRead[CLUNET_OFFSET_SRC_ADDRESS], dataToRead[CLUNET_OFFSET_DST_ADDRESS], dataToRead[CLUNET_OFFSET_COMMAND], (char*)(dataToRead+CLUNET_OFFSET_DATA), dataToRead[CLUNET_OFFSET_SIZE]);
+				}
+				break;
+		}
+	}	
+	else 
+	{
+		clunetTimerStart = CLUNET_TIMER_REG;
+		clunetTimerPeriods = 0;
+		CLUNET_ENABLE_TIMER_OVF;
+	}
+}
+
+void clunet_init()
+{
+	sei();
+	CLUNET_SEND_INIT;
+	CLUNET_READ_INIT;
+	CLUNET_TIMER_INIT;
+	CLUNET_INIT_INT;
+	CLUNET_ENABLE_INT;
+	char reset_source = MCUCSR;
+	clunet_send(CLUNET_BROADCAST_ADDRESS, CLUNET_PRIORITY_MESSAGE,	CLUNET_COMMAND_BOOT_COMPLETED, &reset_source, 1);
+	MCUCSR = 0;
+}
+
+int clunet_ready_to_send() // Âîçâðàùàåò 0, åñëè ãîòîâ ê ïåðåäà÷å, èíà÷å ïðèîðèòåò òåêóùåé çàäà÷è
+{
+	if (clunetSendingState == CLUNET_SENDING_STATE_IDLE) return 0;
+	return clunetCurrentPrio;
+}
+
+void clunet_set_on_data_received(void (*f)(unsigned char src_address, unsigned char dst_address, unsigned char command, char* data, unsigned char size))
+{	
+	on_data_received = f;
+}
+
+void clunet_set_on_data_received_sniff(void (*f)(unsigned char src_address, unsigned char dst_address, unsigned char command, char* data, unsigned char size))
+{	
+	on_data_received_sniff = f;
+}
+
diff --git a/clunet.h b/clunet.h
new file mode 100644
index 0000000..f19145c
--- /dev/null
+++ b/clunet.h
@@ -0,0 +1,221 @@
+/* Name: clunet.h
+ * Project: CLUNET network driver
+ * Author: Alexey Avdyukhin
+ * Creation Date: 2013-07-23
+ * License: DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+ */
+ 
+#ifndef __clunet_h_included__
+#define __clunet_h_included__
+
+#include "bits.h"
+#include "clunet_config.h"
+
+#define CLUNET_SENDING_STATE_IDLE 0
+#define CLUNET_SENDING_STATE_INIT 1
+#define CLUNET_SENDING_STATE_PRIO1 2
+#define CLUNET_SENDING_STATE_PRIO2 3
+#define CLUNET_SENDING_STATE_DATA 4
+#define CLUNET_SENDING_STATE_WAITING_LINE 6
+#define CLUNET_SENDING_STATE_PREINIT 7
+#define CLUNET_SENDING_STATE_STOP 8
+#define CLUNET_SENDING_STATE_DONE 9
+
+#define CLUNET_READING_STATE_IDLE 0
+#define CLUNET_READING_STATE_INIT 1
+#define CLUNET_READING_STATE_PRIO1 2
+#define CLUNET_READING_STATE_PRIO2 3
+#define CLUNET_READING_STATE_HEADER 4
+#define CLUNET_READING_STATE_DATA 5
+
+#define CLUNET_OFFSET_SRC_ADDRESS 0
+#define CLUNET_OFFSET_DST_ADDRESS 1
+#define CLUNET_OFFSET_COMMAND 2
+#define CLUNET_OFFSET_SIZE 3
+#define CLUNET_OFFSET_DATA 4
+#define CLUNET_BROADCAST_ADDRESS 0xFF
+
+#define CLUNET_COMMAND_DISCOVERY 0x00
+/* Ïîèñê äðóãèõ óñòðîéñòâ, ïàðàìåòðîâ íåò */
+
+#define CLUNET_COMMAND_DISCOVERY_RESPONSE 0x01
+/* Îòâåò óñòðîéñòâ íà ïîèñê, â êà÷åñòâå ïàðàìåòðà - íàçâàíèå óñòðîéñòâà (òåêñò) */
+
+#define CLUNET_COMMAND_BOOT_CONTROL 0x02
+/* Ðàáîòà ñ çàãðóç÷èêîì. Äàííûå - ñóáêîìàíäà.
+<-0 - çàãðóç÷èê çàïóùåí
+->1 - ïåðåéòè â ðåæèì îáíîâëåíèÿ ïðîøèâêè
+<-2 - ïîäòâåðæäåíèå ïåðåõîäà, ïëþñ äâà áàéòà - ðàçìåð ñòðàíèöû
+->3 çàïèñü ïðîøèâêè, 4 áàéòà - àäðåñ, âñ¸ îñòàëüíîå - äàííûå (ðàâíûå ðàçìåðó ñòðàíèöû)
+<-4 áëîê ïðîøèâêè çàïèñàí
+->5 âûõîä èç ðåæèìà ïðîøèâêè */
+
+#define CLUNET_COMMAND_REBOOT 0x03
+/* Ïåðåçàãðóæàåò óñòðîéñòâî â çàãðóç÷èê. */
+
+#define CLUNET_COMMAND_BOOT_COMPLETED 0x04
+/* Ïîñûëàåòñÿ óñòðîéñòâîì ïîñëå èíèöèàëèçàöèè áèáëèîòåêè, ñîîáùàåò îá óñïåøíîé çàãðóçêå óñòðîéñòâà. Ïàðàìåòð - ñîäåðæèìîå MCU ðåãèñòðà, ãîâîðÿùåå î ïðè÷èíå ïåðåçàãðóçêè. */
+
+#define CLUNET_COMMAND_DOOR_INFO 0x05
+/*Èíôîðìàöèÿ îá îòêðûòèè äâåðè.
+0 - çàêðûòà
+1 - îòêðûòà
+2 - òðåâîãà */
+
+#define CLUNET_COMMAND_DEVICE_POWER_INFO_REQUEST 0x06
+/* Çàïðàøèâàåò èíôîðìàöèþ î ñîñòîÿíèè âûêëþ÷àòåëåé */
+
+#define CLUNET_COMMAND_DEVICE_POWER_INFO 0x07
+/* Ñîñòîÿíèå âûêëþ÷àòåëåé. Ïàðàìåòð - áèòîâàÿ ìàñêà ñîñòîÿíèÿ âûêëþ÷àòåëåé. */
+
+#define CLUNET_COMMAND_DEVICE_POWER_COMMAND 0x08
+/* Âêëþ÷àåò/âûêëþ÷àåò âûêëþ÷àòåëè. Ïàðàìåòð - áèòîâàÿ ìàñêà. Äëÿ ñâåòà 0xFE - óáàâèòü ñâåò, à 0xFF - ïðèáàâèòü. */
+
+#define CLUNET_COMMAND_SET_TIMER 0x09
+/* Óñòàíîâêà òàéìåðà. Ïàðàìåòð - êîë-âî ñåêóíä (äâà áàéòà) */
+
+#define CLUNET_COMMAND_RC_BUTTON_PRESSED 0x0A
+/* Íàæàòà êíîïêà íà ïóëüòå. Ïåðâûé áàéò - òèï êîäà, äàëåå - íîìåð êíîïêè.
+Íà äàííûé ìîìåíò 01 - ñàìûé ïîïóëÿðíûé ñòàíäàðò (Sony âðîäå?) äëèíà êîäà êíîïêè - 4 áàéòà.
+02 - óäåðæàíèå êíîïêè åãî æå. */
+
+#define CLUNET_COMMAND_RC_BUTTON_PRESSED_RAW 0x0B
+/* Íåäåêîäèðîâàííûå äàííûå î íàæàòîé êíîïêå íà ïóëüòå äëÿ íåñòàíäàðòíûõ ïóëüòîâ. Èäóò ïà÷êàìè ïî 4 áàéòà. 2 èç êîòîðûõ - äëèòåëüíîñòü ñèãíàëà è 2 - äëèòåëüíîñòü åãî îòñóòñòâèÿ â 0.032 äîëÿõ ìèëëèñåêóíäû. (1/8000000*256 ñåê) */
+
+#define CLUNET_COMMAND_RC_BUTTON_SEND 0x0C
+/* Çàýìóëèðîâàòü êíîïêó ïóëüòà. Ôîðìàò äàííûõ àíàëîãè÷åí CLUNET_COMMAND_RC_BUTTON_PRESSED, ïëþñ â êîíöå îïöèîíàëüíûé áàéò äëèòåëüíîñòè óäåðæàíèÿ êíîïêè (êîë-âî äîïîëíèòåëüíûõ ñèãíàëîâ), äëÿ Sony ýòî ~30ìñ */
+
+#define CLUNET_COMMAND_RC_BUTTON_SEND_RAW 0x0D
+/* Çàýìóëèðîâàòü êíîïêó ïóëüòà íà îñíîâå ñûðûõ äàííûõ. Ôîðìàò äàííûõ àíàëîãè÷åí CLUNET_COMMAND_RC_BUTTON_PRESSED_RAW. */
+
+#define CLUNET_COMMAND_LIGHT_LEVEL 0x0E
+/* Ñîîáùàåò îá óðîâíå îñâåùåíèÿ. Ïàðàìåòð - 2 áàéòà (0x0000 - 0x1FFF, ãäå 0x1FFF - 0 âîëüò ìåæäó ôîòîäèîäîì è çåìë¸é, à 0x0000 - 5 âîëüò). */
+
+#define CLUNET_COMMAND_ONEWIRE_START_SEARCH 0x0F
+/* Çàïóñê ïîèñêà 1-wire óñòðîéñòâ, äàííûå ïóñòûå. */
+
+#define CLUNET_COMMAND_ONEWIRE_DEVICE_FOUND 0x10
+/* Ñîîáùàåò î íàéäåííîì 1-wire óñòðîéñòå. Äàííûå - 8 áàéò, âêëþ÷àþùèå òèï óñòðîéñòâà, ñåðèéíûé íîìåð è CRC. */
+
+#define CLUNET_COMMAND_TEMPERATURE 0x11
+/* Ñîîáùàåò î òåìïåðàòóðå. 1 áàéò - òèï óñòðîéñòâà, 6 - ñåðèéíèê, 2 - òåìïåðàòóðà â ôîðìàòå óñòðîéñòâà (ñìîòðåòü íà òèï, ÷òîáû äåêîäèðîâàòü!) */
+
+#define CLUNET_COMMAND_TIME 0x12
+/* Ñîîáùàåò âðåìÿ. Øåñòü áàéò - ÷àñû, ìèíóòû, ñåêóíäû, ãîä (îò 1900), ìåñÿö (îò 0), äåíü (îò 1) */
+
+#define CLUNET_COMMAND_WHEEL 0x13
+/* Ñîîáùàåò îáîðîòû êîëåñà ìûøè, ïåðâûé áàéò - ID êîëåñà, äàëåå äâà áàéòà - îáîðîòû */
+
+#define CLUNET_COMMAND_VOLTAGE 0x14
+/* Ñîîáùàåò íàïðÿæåíèå íà áàòàðåéêå, ïåðâûé áàéò - ID óñòðîéñòâà, äàëåå äâà áàéòà - âîëüòàæ, ãäå 0x3FF = 5.12 */
+
+#define CLUNET_COMMAND_MOTION 0x15
+/* Ñîîáùàåò, ÷òî â ïîìåùåíèè åñòü äâèæåíèå, ïåðâûé áàéò - ID äàò÷èêà/êàìåðû */
+
+#define CLUNET_COMMAND_INTERCOM_RING 0x16
+/* Çâîíîê â äîìîôîí */
+
+#define CLUNET_COMMAND_INTERCOM_MESSAGE 0x17
+/* Íîâîå ñîîáùåíèå íà àâòîîòâåò÷èêå äîìîôîíà, â äàííûõ 4 áàéòà - íîìåð ñîîáùåíèÿ */
+
+#define CLUNET_COMMAND_INTERCOM_MODE_REQUEST 0x18
+/* Çàïðàøèâàåò ðåæèì ðàáîòû äîìîôîíà */
+
+#define CLUNET_COMMAND_INTERCOM_MODE_INFO 0x19
+/* Ñîîáùàåò ðåæèì ðàáîòû äîìîôîíà, ïåðâûé áàéò - ïîñòîÿííûé ðåæèì, âòîðîé - âðåìåííûé */
+
+#define CLUNET_COMMAND_INTERCOM_MODE_SET 0x1A
+/* Çàäà¸ò ðåæèì ðàáîòû äîìîôîíà, ïåðâûé áàéò - ïîñòîÿííûé ðåæèì (èëè 0xFF, ÷òîáû íå òðîãàòü), âòîðîé - âðåìåííûé (îïöèîíàëüíî) */
+
+#define CLUNET_COMMAND_INTERCOM_RECORD_REQUEST 0x1B
+/* Çàïðàøèâàåò çàïèñü ó äîìîôîíà, ïîäòâåðæäàåò äîñòàâêó èëè çàâåðøàåò ïåðåäà÷ó
+ Åñëè 4 áàéòà, òî ýòî íîìåð çàïðàøèâàåìîé çàïèñè
+ Åñëè 1 áàéò, òî 1 â ñëó÷àå ïîäòâåðæäåíèÿ ïîëó÷åíèÿ ïàêåòà, 0 - çàâåðøåíèå ïåðåäà÷è */
+ 
+#define CLUNET_COMMAND_INTERCOM_RECORD_DATA 0x1C
+/* Ïåðåäà¸ò êóñîê çàïèñè ñ àâòîîòâåò÷èêà. Ïåðâûå 4 áàéòà - íîìåð çàïèñè, äàëåå 4 áàéòà - ñìåùåíèå îò íà÷àëà ôàéëà, âñ¸ äàëåå - äàííûå èç ôàéëà */
+
+#define CLUNET_COMMAND_PING 0xFE
+/* Ïèíã, íà ýòó êîìàíäó óñòðîéñòâî äîëæíî îòâåòèòü ñëåäóþùåé êîìàíäîé, âîçâðàòèâ âåñü áóôåð */
+
+#define CLUNET_COMMAND_PING_REPLY 0xFF
+/* Îòâåò íà ïèíã, â äàííûõ òî, ÷òî áûëî ïðèñëàíî â ïðåäûäóùåé êîìàíäå */
+
+#define CLUNET_PRIORITY_NOTICE 1
+/* Ïðèîðèòåò ïàêåòà 1 - íåâàæíîå óâåäîìëåíèå, êîòîðîå âîîáùå ìîæåò áûòü ïîòåðÿíî áåç ïîñëåäñòâèé */
+
+#define CLUNET_PRIORITY_INFO 2
+/* Ïðèîðèòåò ïàêåòà 2 - êàêàÿ-òî èíôîðìàöèÿ, íå î÷åíü âàæíàÿ */
+
+#define CLUNET_PRIORITY_MESSAGE 3
+/* Ïðèîðèòåò ïàêåòà 3 - ñîîáùåíèå ñ êàêîé-òî âàæíîé èíôîðìàöèåé */
+
+#define CLUNET_PRIORITY_COMMAND 4
+/* Ïðèîðèòåò ïàêåòà 4 - êîìàíäà, íà êîòîðóþ íóæíî ñðàçó îòðåàãèðîâàòü */
+
+#define CLUNET_T ((F_CPU / CLUNET_TIMER_PRESCALER) / 15625)
+#if CLUNET_T < 8
+#  error Timer frequency is too small, increase CPU frequency or decrease timer prescaler
+#endif
+#if CLUNET_T > 24
+#  error Timer frequency is too big, decrease CPU frequency or increase timer prescaler
+#endif
+
+#define CLUNET_0_T (CLUNET_T)
+#define CLUNET_1_T (3*CLUNET_T)
+#define CLUNET_INIT_T (10*CLUNET_T)
+
+#define CLUNET_CONCAT(a, b)            a ## b
+#define CLUNET_OUTPORT(name)           CLUNET_CONCAT(PORT, name)
+#define CLUNET_INPORT(name)            CLUNET_CONCAT(PIN, name)
+#define CLUNET_DDRPORT(name)           CLUNET_CONCAT(DDR, name)
+
+#ifndef CLUNET_WRITE_TRANSISTOR
+#  define CLUNET_SEND_1 CLUNET_DDRPORT(CLUNET_WRITE_PORT) |= (1 << CLUNET_WRITE_PIN)
+#  define CLUNET_SEND_0 CLUNET_DDRPORT(CLUNET_WRITE_PORT) &= ~(1 << CLUNET_WRITE_PIN)
+#  define CLUNET_SENDING (CLUNET_DDRPORT(CLUNET_WRITE_PORT) & (1 << CLUNET_WRITE_PIN))
+#  define CLUNET_SEND_INVERT CLUNET_DDRPORT(CLUNET_WRITE_PORT) ^= (1 << CLUNET_WRITE_PIN)
+#  define CLUNET_SEND_INIT { CLUNET_OUTPORT(CLUNET_WRITE_PORT) &= ~(1 << CLUNET_WRITE_PIN); CLUNET_SEND_0; }
+#else
+#  define CLUNET_SEND_1 CLUNET_OUTPORT(CLUNET_WRITE_PORT) |= (1 << CLUNET_WRITE_PIN)
+#  define CLUNET_SEND_0 CLUNET_OUTPORT(CLUNET_WRITE_PORT) &= ~(1 << CLUNET_WRITE_PIN)
+#  define CLUNET_SENDING (CLUNET_OUTPORT(CLUNET_WRITE_PORT) & (1 << CLUNET_WRITE_PIN))
+#  define CLUNET_SEND_INVERT CLUNET_OUTPORT(CLUNET_WRITE_PORT) ^= (1 << CLUNET_WRITE_PIN)
+#  define CLUNET_SEND_INIT { CLUNET_DDRPORT(CLUNET_WRITE_PORT) |= (1 << CLUNET_WRITE_PIN); CLUNET_SEND_0; }
+#endif
+
+#define CLUNET_READ_INIT { CLUNET_DDRPORT(CLUNET_READ_PORT) &= ~(1 << CLUNET_READ_PIN); CLUNET_OUTPORT(CLUNET_READ_PORT) |= (1 << CLUNET_READ_PIN); }
+#define CLUNET_READING (!(CLUNET_INPORT(CLUNET_READ_PORT) & (1 << CLUNET_READ_PIN)))
+
+#ifndef CLUNET_SEND_BUFFER_SIZE
+#  error CLUNET_SEND_BUFFER_SIZE is not defined
+#endif
+#ifndef CLUNET_READ_BUFFER_SIZE
+#  error CLUNET_READ_BUFFER_SIZE is not defined
+#endif
+#if CLUNET_SEND_BUFFER_SIZE > 255
+#  error CLUNET_SEND_BUFFER_SIZE must be <= 255
+#endif
+#if CLUNET_READ_BUFFER_SIZE > 255
+#  error CLUNET_READ_BUFFER_SIZE must be <= 255
+#endif
+
+// Èíèöèàëèçàöèÿ
+void clunet_init();
+
+// Îòïðàâêà ïàêåòà
+void clunet_send(unsigned char address, unsigned char prio, unsigned char command, char* data, unsigned char size);
+
+// Âîçâðàùàåò 0, åñëè ãîòîâ ê ïåðåäà÷å, èíà÷å ïðèîðèòåò òåêóùåé çàäà÷è
+int clunet_ready_to_send();
+
+// Óñòàíîâêà ôóíêöèé, êîòîðûå âûçûâàþòñÿ ïðè ïîëó÷åíèè ïàêåòîâ
+// Ýòà - ïîëó÷àåò ïàêåòû, êîòîðûå àäðåñîâàíû íàì
+void clunet_set_on_data_received(void (*f)(unsigned char src_address, unsigned char dst_address, unsigned char command, char* data, unsigned char size));
+
+// À ýòà - àáñîëþòíî âñå, êîòîðûå õîäÿò ïî ñåòè, âêëþ÷àÿ íàøè
+void clunet_set_on_data_received_sniff(void (*f)(unsigned char src_address, unsigned char dst_address, unsigned char command, char* data, unsigned char size));
+
+char check_crc(char* data, unsigned char size);
+
+#endif
diff --git a/clunet_config.h b/clunet_config.h
new file mode 100644
index 0000000..7369e95
--- /dev/null
+++ b/clunet_config.h
@@ -0,0 +1,61 @@
+/* Name: clunet_config.h
+ * Project: CLUNET network driver
+ * Author: Alexey Avdyukhin
+ * Creation Date: 2012-11-08
+ * License: DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+ */
+ 
+ #ifndef __clunet_config_h_included__
+#define __clunet_config_h_included__
+
+// Àäðåñ óñòðîéñòâà (0-255)
+#define CLUNET_DEVICE_ID 7
+
+// Èìÿ óñòðîéñòâà
+#define CLUNET_DEVICE_NAME "Intercom"
+
+// Ðàçìåð áóôåðà äëÿ ÷òåíèÿ è ïåðåäà÷è (ñêîëüêî îïåðàòèâêè ñîæðàòü)
+#define CLUNET_SEND_BUFFER_SIZE 128
+#define CLUNET_READ_BUFFER_SIZE 128
+
+// Ïîðò è íîãà äëÿ îòïðàâêè äàííûõ
+#define CLUNET_WRITE_PORT D
+#define CLUNET_WRITE_PIN 0
+
+// Îïðåäåëèòü, åñëè ëèíèÿ ïðèæèìàåòñÿ ê çåìëå òðàíçèñòîðîì
+#define CLUNET_WRITE_TRANSISTOR
+
+// Ïîðò è íîãà äëÿ ÷òåíèÿ äàííûõ, äîëæíà èìåòü âíåøíååå ïðåðûâàíèå
+#define CLUNET_READ_PORT D
+#define CLUNET_READ_PIN 1
+
+// Ïðåääåëèòåëü òàéìåðà
+#define CLUNET_TIMER_PRESCALER 64
+
+// Èíèöèàëèçàöèÿ òàéìåðà
+#define CLUNET_TIMER_INIT {unset_bit4(TCCR2, WGM21, WGM20, COM21, COM20); /* Timer2, íîðìàëüíûé ðåæèì */ \
+	unset_bit(TCCR2, CS22); set_bit2(TCCR2, CS21, CS20); /* 64x ïðåääåëèòåëü */ }
+
+// Ðåãèñòð ñàìîãî òàéìåðà è êîìïàðåðà
+#define CLUNET_TIMER_REG TCNT2
+#define CLUNET_TIMER_REG_OCR OCR2
+
+// Âêëþ÷åíèå/âûêëþ÷åíèå ïðåðûâàíèé òàéìåðà
+#define CLUNET_ENABLE_TIMER_COMP set_bit(TIMSK, OCIE2)
+#define CLUNET_DISABLE_TIMER_COMP unset_bit(TIMSK, OCIE2)
+#define CLUNET_ENABLE_TIMER_OVF set_bit(TIMSK, TOIE2)
+#define CLUNET_DISABLE_TIMER_OVF unset_bit(TIMSK, TOIE2)
+
+// Èíèöèàëèçàöèÿ âíåøíåãî ïðåðûâàíèÿ è åãî âêëþ÷åíèå
+#define CLUNET_INIT_INT {set_bit(EICRA,ISC10);unset_bit(EICRA,ISC11);}
+#define CLUNET_ENABLE_INT set_bit(EIMSK, INT1)
+
+// Âåêòîðû ïðåðûâàíèé äëÿ òàéìåðà è âíåøíåãî ïðåðûâàíèÿ
+#define CLUNET_TIMER_COMP_VECTOR TIMER2_COMP_vect
+#define CLUNET_TIMER_OVF_VECTOR TIMER2_OVF_vect
+#define CLUNET_INT_VECTOR INT1_vect
+
+// Äîáàâëÿåò êîä äëÿ îáíîâëåíèÿ çàãðóç÷èêà
+//#define CLUNET_ENABLE_BOOT_UPDATE
+
+#endif
\ No newline at end of file
diff --git a/defines.h b/defines.h
new file mode 100644
index 0000000..08e4a3d
--- /dev/null
+++ b/defines.h
@@ -0,0 +1,20 @@
+#define F_CPU 8000000UL
+
+#define LINE_POWER (!((PINA >> 3) & 1))
+#define ANSWER set_bit(PORTA, 5)
+#define HANGUP unset_bit(PORTA, 5)
+#define MODE_NORMAL { unset_bit(PORTA, 6); } // Ïåðåêëþ÷èòü ðåëå è ïîäòÿíóòü âûâîä çâóêà ê +
+#define MODE_MYSOUND { set_bit(PORTA, 6); } // Âûâîä çâóêà íà âõîä è ïåðåêëþ÷èòü ðåëå
+#define OFFHOOK (!(PING & 1))
+#define CONTROL (PINA>>7)
+#define OPEN {set_bit(DDRA,4); _delay_ms(500); unset_bit(DDRA,4);}
+#define LED_RED_ON set_bit(PORTD, 6)
+#define LED_RED_OFF unset_bit(PORTD, 6)
+#define LED_GREEN_ON set_bit(PORTD, 7)
+#define LED_GREEN_OFF unset_bit(PORTD, 7)
+
+#define RECORD_MAX_LENGTH 10
+#define RECORD_FIX -0x0A
+#define TRANSFER_PACKET_SIZE 64
+#define TRANSFER_TIMEOUT 20
+#define TRANSFER_PAUSE 500
diff --git a/diskio.c b/diskio.c
new file mode 100644
index 0000000..528535a
--- /dev/null
+++ b/diskio.c
@@ -0,0 +1,600 @@
+/*-----------------------------------------------------------------------*/
+/* MMCv3/SDv1/SDv2 (in SPI mode) control module  (C)ChaN, 2010           */
+/*-----------------------------------------------------------------------*/
+
+#include <avr/io.h>
+#include "diskio.h"
+
+
+/* Port controls  (Platform dependent) */
+#define CS_LOW()	PORTB &= ~1			/* CS=low */
+#define	CS_HIGH()	PORTB |= 1			/* CS=high */
+#define	FCLK_SLOW()	SPCR = 0x52		/* Set slow clock (F_CPU / 64) */
+#define	FCLK_FAST()	SPCR = 0x50		/* Set fast clock (F_CPU / 2) */
+
+
+/*--------------------------------------------------------------------------
+
+   Module Private Functions
+
+---------------------------------------------------------------------------*/
+
+/* Definitions for MMC/SDC command */
+#define CMD0	(0)			/* GO_IDLE_STATE */
+#define CMD1	(1)			/* SEND_OP_COND (MMC) */
+#define	ACMD41	(0x80+41)	/* SEND_OP_COND (SDC) */
+#define CMD8	(8)			/* SEND_IF_COND */
+#define CMD9	(9)			/* SEND_CSD */
+#define CMD10	(10)		/* SEND_CID */
+#define CMD12	(12)		/* STOP_TRANSMISSION */
+#define ACMD13	(0x80+13)	/* SD_STATUS (SDC) */
+#define CMD16	(16)		/* SET_BLOCKLEN */
+#define CMD17	(17)		/* READ_SINGLE_BLOCK */
+#define CMD18	(18)		/* READ_MULTIPLE_BLOCK */
+#define CMD23	(23)		/* SET_BLOCK_COUNT (MMC) */
+#define	ACMD23	(0x80+23)	/* SET_WR_BLK_ERASE_COUNT (SDC) */
+#define CMD24	(24)		/* WRITE_BLOCK */
+#define CMD25	(25)		/* WRITE_MULTIPLE_BLOCK */
+#define CMD32	(32)		/* ERASE_ER_BLK_START */
+#define CMD33	(33)		/* ERASE_ER_BLK_END */
+#define CMD38	(38)		/* ERASE */
+#define CMD55	(55)		/* APP_CMD */
+#define CMD58	(58)		/* READ_OCR */
+
+
+static volatile
+DSTATUS Stat = STA_NOINIT;	/* Disk status */
+
+static volatile
+BYTE Timer1, Timer2;	/* 100Hz decrement timer */
+
+static
+BYTE CardType;			/* Card type flags */
+
+
+/*-----------------------------------------------------------------------*/
+/* Power Control  (Platform dependent)                                   */
+/*-----------------------------------------------------------------------*/
+/* When the target system does not support socket power control, there   */
+/* is nothing to do in these functions and chk_power always returns 1.   */
+
+static
+int power_status (void)		/* Socket power state: 0=off, 1=on */
+{
+	return 1;//(PORTE & _BV(7)) ? 0 : 1;
+}
+
+static
+void power_on (void)
+{
+	PORTB |= 0b00000101;	/* Configure SCK/MOSI/CS as output */
+	DDRB  |= 0b00000111;
+
+	SPCR = 0x52;			/* Enable SPI function in mode 0 */
+	SPSR = 0x01;			/* SPI 2x mode */
+}
+
+static
+void power_off (void)
+{
+	SPCR = 0;				/* Disable SPI function */
+
+	DDRB  &= ~0b00000111;	/* Set SCK/MOSI/CS as hi-z, INS#/WP as pull-up */
+	PORTB &= ~0b00000111;
+}
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Transmit/Receive data from/to MMC via SPI  (Platform dependent)       */
+/*-----------------------------------------------------------------------*/
+
+/* Exchange a byte */
+static
+BYTE xchg_spi (		/* Returns received data */
+	BYTE dat		/* Data to be sent */
+)
+{
+	SPDR = dat;
+	loop_until_bit_is_set(SPSR, SPIF);
+	return SPDR;
+}
+
+/* Send a data block fast */
+static
+void xmit_spi_multi (
+	const BYTE *p,	/* Data block to be sent */
+	UINT cnt		/* Size of data block */
+)
+{
+	do {
+		SPDR = *p++; loop_until_bit_is_set(SPSR,SPIF);
+		SPDR = *p++; loop_until_bit_is_set(SPSR,SPIF);
+	} while (cnt -= 2);
+}
+
+/* Receive a data block fast */
+static
+void rcvr_spi_multi (
+	BYTE *p,	/* Data buffer */
+	UINT cnt	/* Size of data block */
+)
+{
+	do {
+		SPDR = 0xFF; loop_until_bit_is_set(SPSR,SPIF); *p++ = SPDR;
+		SPDR = 0xFF; loop_until_bit_is_set(SPSR,SPIF); *p++ = SPDR;
+	} while (cnt -= 2);
+}
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Wait for card ready                                                   */
+/*-----------------------------------------------------------------------*/
+
+static
+int wait_ready (	/* 1:Ready, 0:Timeout */
+	UINT wt			/* Timeout [ms] */
+)
+{
+	BYTE d;
+
+
+	Timer2 = wt / 10;
+	do
+		d = xchg_spi(0xFF);
+	while (d != 0xFF && Timer2);
+
+	return (d == 0xFF) ? 1 : 0;
+}
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Deselect the card and release SPI bus                                 */
+/*-----------------------------------------------------------------------*/
+
+static
+void deselect (void)
+{
+	CS_HIGH();
+	xchg_spi(0xFF);	/* Dummy clock (force DO hi-z for multiple slave SPI) */
+}
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Select the card and wait for ready                                    */
+/*-----------------------------------------------------------------------*/
+
+static
+int select (void)	/* 1:Successful, 0:Timeout */
+{
+	CS_LOW();
+	xchg_spi(0xFF);	/* Dummy clock (force DO enabled) */
+
+	if (wait_ready(500)) return 1;	/* OK */
+	deselect();
+	return 0;	/* Timeout */
+}
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Receive a data packet from MMC                                        */
+/*-----------------------------------------------------------------------*/
+
+static
+int rcvr_datablock (
+	BYTE *buff,			/* Data buffer to store received data */
+	UINT btr			/* Byte count (must be multiple of 4) */
+)
+{
+	BYTE token;
+
+
+	Timer1 = 20;
+	do {							/* Wait for data packet in timeout of 200ms */
+		token = xchg_spi(0xFF);
+	} while ((token == 0xFF) && Timer1);
+	if (token != 0xFE) return 0;	/* If not valid data token, retutn with error */
+
+	rcvr_spi_multi(buff, btr);		/* Receive the data block into buffer */
+	xchg_spi(0xFF);					/* Discard CRC */
+	xchg_spi(0xFF);
+
+	return 1;						/* Return with success */
+}
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Send a data packet to MMC                                             */
+/*-----------------------------------------------------------------------*/
+
+#if	_USE_WRITE
+static
+int xmit_datablock (
+	const BYTE *buff,	/* 512 byte data block to be transmitted */
+	BYTE token			/* Data/Stop token */
+)
+{
+	BYTE resp;
+
+
+	if (!wait_ready(500)) return 0;
+
+	xchg_spi(token);					/* Xmit data token */
+	if (token != 0xFD) {	/* Is data token */
+		xmit_spi_multi(buff, 512);		/* Xmit the data block to the MMC */
+		xchg_spi(0xFF);					/* CRC (Dummy) */
+		xchg_spi(0xFF);
+		resp = xchg_spi(0xFF);			/* Reveive data response */
+		if ((resp & 0x1F) != 0x05)		/* If not accepted, return with error */
+			return 0;
+	}
+
+	return 1;
+}
+#endif
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Send a command packet to MMC                                          */
+/*-----------------------------------------------------------------------*/
+
+static
+BYTE send_cmd (		/* Returns R1 resp (bit7==1:Send failed) */
+	BYTE cmd,		/* Command index */
+	DWORD arg		/* Argument */
+)
+{
+	BYTE n, res;
+
+
+	if (cmd & 0x80) {	/* ACMD<n> is the command sequense of CMD55-CMD<n> */
+		cmd &= 0x7F;
+		res = send_cmd(CMD55, 0);
+		if (res > 1) return res;
+	}
+
+	/* Select the card and wait for ready */
+	deselect();
+	if (!select()) return 0xFF;
+
+	/* Send command packet */
+	xchg_spi(0x40 | cmd);				/* Start + Command index */
+	xchg_spi((BYTE)(arg >> 24));		/* Argument[31..24] */
+	xchg_spi((BYTE)(arg >> 16));		/* Argument[23..16] */
+	xchg_spi((BYTE)(arg >> 8));			/* Argument[15..8] */
+	xchg_spi((BYTE)arg);				/* Argument[7..0] */
+	n = 0x01;							/* Dummy CRC + Stop */
+	if (cmd == CMD0) n = 0x95;			/* Valid CRC for CMD0(0) + Stop */
+	if (cmd == CMD8) n = 0x87;			/* Valid CRC for CMD8(0x1AA) Stop */
+	xchg_spi(n);
+
+	/* Receive command response */
+	if (cmd == CMD12) xchg_spi(0xFF);		/* Skip a stuff byte when stop reading */
+	n = 10;								/* Wait for a valid response in timeout of 10 attempts */
+	do
+		res = xchg_spi(0xFF);
+	while ((res & 0x80) && --n);
+
+	return res;			/* Return with the response value */
+}
+
+
+
+/*--------------------------------------------------------------------------
+
+   Public Functions
+
+---------------------------------------------------------------------------*/
+
+
+/*-----------------------------------------------------------------------*/
+/* Initialize Disk Drive                                                 */
+/*-----------------------------------------------------------------------*/
+
+DSTATUS disk_initialize (
+	BYTE pdrv		/* Physical drive nmuber (0) */
+)
+{
+	BYTE n, cmd, ty, ocr[4];
+
+
+	if (pdrv) return STA_NOINIT;		/* Supports only single drive */
+	power_off();						/* Turn off the socket power to reset the card */
+	if (Stat & STA_NODISK) return Stat;	/* No card in the socket */
+	power_on();							/* Turn on the socket power */
+	FCLK_SLOW();
+	for (n = 10; n; n--) xchg_spi(0xFF);	/* 80 dummy clocks */
+
+	ty = 0;
+	if (send_cmd(CMD0, 0) == 1) {			/* Enter Idle state */
+		Timer1 = 100;						/* Initialization timeout of 1000 msec */
+		if (send_cmd(CMD8, 0x1AA) == 1) {	/* SDv2? */
+			for (n = 0; n < 4; n++) ocr[n] = xchg_spi(0xFF);		/* Get trailing return value of R7 resp */
+			if (ocr[2] == 0x01 && ocr[3] == 0xAA) {				/* The card can work at vdd range of 2.7-3.6V */
+				while (Timer1 && send_cmd(ACMD41, 1UL << 30));	/* Wait for leaving idle state (ACMD41 with HCS bit) */
+				if (Timer1 && send_cmd(CMD58, 0) == 0) {		/* Check CCS bit in the OCR */
+					for (n = 0; n < 4; n++) ocr[n] = xchg_spi(0xFF);
+					ty = (ocr[0] & 0x40) ? CT_SD2 | CT_BLOCK : CT_SD2;	/* SDv2 */
+				}
+			}
+		} else {							/* SDv1 or MMCv3 */
+			if (send_cmd(ACMD41, 0) <= 1) 	{
+				ty = CT_SD1; cmd = ACMD41;	/* SDv1 */
+			} else {
+				ty = CT_MMC; cmd = CMD1;	/* MMCv3 */
+			}
+			while (Timer1 && send_cmd(cmd, 0));			/* Wait for leaving idle state */
+			if (!Timer1 || send_cmd(CMD16, 512) != 0)	/* Set R/W block length to 512 */
+				ty = 0;
+		}
+	}
+	CardType = ty;
+	deselect();
+
+	if (ty) {			/* Initialization succeded */
+		Stat &= ~STA_NOINIT;		/* Clear STA_NOINIT */
+		FCLK_FAST();
+	} else {			/* Initialization failed */
+		power_off();
+	}
+
+	return Stat;
+}
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Get Disk Status                                                       */
+/*-----------------------------------------------------------------------*/
+
+DSTATUS disk_status (
+	BYTE pdrv		/* Physical drive nmuber (0) */
+)
+{
+	if (pdrv) return STA_NOINIT;	/* Supports only single drive */
+	return Stat;
+}
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Read Sector(s)                                                        */
+/*-----------------------------------------------------------------------*/
+
+DRESULT disk_read (
+	BYTE pdrv,			/* Physical drive nmuber (0) */
+	BYTE *buff,			/* Pointer to the data buffer to store read data */
+	DWORD sector,		/* Start sector number (LBA) */
+	BYTE count			/* Sector count (1..255) */
+)
+{
+	if (pdrv || !count) return RES_PARERR;
+	if (Stat & STA_NOINIT) return RES_NOTRDY;
+
+	if (!(CardType & CT_BLOCK)) sector *= 512;	/* Convert to byte address if needed */
+
+	if (count == 1) {	/* Single block read */
+		if ((send_cmd(CMD17, sector) == 0)	/* READ_SINGLE_BLOCK */
+			&& rcvr_datablock(buff, 512))
+			count = 0;
+	}
+	else {				/* Multiple block read */
+		if (send_cmd(CMD18, sector) == 0) {	/* READ_MULTIPLE_BLOCK */
+			do {
+				if (!rcvr_datablock(buff, 512)) break;
+				buff += 512;
+			} while (--count);
+			send_cmd(CMD12, 0);				/* STOP_TRANSMISSION */
+		}
+	}
+	deselect();
+
+	return count ? RES_ERROR : RES_OK;
+}
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Write Sector(s)                                                       */
+/*-----------------------------------------------------------------------*/
+
+#if _USE_WRITE
+DRESULT disk_write (
+	BYTE pdrv,			/* Physical drive nmuber (0) */
+	const BYTE *buff,	/* Pointer to the data to be written */
+	DWORD sector,		/* Start sector number (LBA) */
+	BYTE count			/* Sector count (1..255) */
+)
+{
+	if (pdrv || !count) return RES_PARERR;
+	if (Stat & STA_NOINIT) return RES_NOTRDY;
+	if (Stat & STA_PROTECT) return RES_WRPRT;
+
+	if (!(CardType & CT_BLOCK)) sector *= 512;	/* Convert to byte address if needed */
+
+	if (count == 1) {	/* Single block write */
+		if ((send_cmd(CMD24, sector) == 0)	/* WRITE_BLOCK */
+			&& xmit_datablock(buff, 0xFE))
+			count = 0;
+	}
+	else {				/* Multiple block write */
+		if (CardType & CT_SDC) send_cmd(ACMD23, count);
+		if (send_cmd(CMD25, sector) == 0) {	/* WRITE_MULTIPLE_BLOCK */
+			do {
+				if (!xmit_datablock(buff, 0xFC)) break;
+				buff += 512;
+			} while (--count);
+			if (!xmit_datablock(0, 0xFD))	/* STOP_TRAN token */
+				count = 1;
+		}
+	}
+	deselect();
+
+	return count ? RES_ERROR : RES_OK;
+}
+#endif
+
+
+/*-----------------------------------------------------------------------*/
+/* Miscellaneous Functions                                               */
+/*-----------------------------------------------------------------------*/
+
+#if _USE_IOCTL
+DRESULT disk_ioctl (
+	BYTE pdrv,		/* Physical drive nmuber (0) */
+	BYTE cmd,		/* Control code */
+	void *buff		/* Buffer to send/receive control data */
+)
+{
+	DRESULT res;
+	BYTE n, csd[16], *ptr = buff;
+	DWORD *dp, st, ed, csize;
+
+
+	if (pdrv) return RES_PARERR;
+
+	res = RES_ERROR;
+
+	if (cmd == CTRL_POWER) {
+		switch (ptr[0]) {
+		case 0:		/* Sub control code (POWER_OFF) */
+			power_off();		/* Power off */
+			res = RES_OK;
+			break;
+		case 1:		/* Sub control code (POWER_GET) */
+			ptr[1] = (BYTE)power_status();
+			res = RES_OK;
+			break;
+		default :
+			res = RES_PARERR;
+		}
+	}
+	else {
+		if (Stat & STA_NOINIT) return RES_NOTRDY;
+
+		switch (cmd) {
+		case CTRL_SYNC :		/* Make sure that no pending write process. Do not remove this or written sector might not left updated. */
+			if (select()) res = RES_OK;
+			break;
+
+		case GET_SECTOR_COUNT :	/* Get number of sectors on the disk (DWORD) */
+			if ((send_cmd(CMD9, 0) == 0) && rcvr_datablock(csd, 16)) {
+				if ((csd[0] >> 6) == 1) {	/* SDC ver 2.00 */
+					csize = csd[9] + ((WORD)csd[8] << 8) + ((DWORD)(csd[7] & 63) << 16) + 1;
+					*(DWORD*)buff = csize << 10;
+				} else {					/* SDC ver 1.XX or MMC*/
+					n = (csd[5] & 15) + ((csd[10] & 128) >> 7) + ((csd[9] & 3) << 1) + 2;
+					csize = (csd[8] >> 6) + ((WORD)csd[7] << 2) + ((WORD)(csd[6] & 3) << 10) + 1;
+					*(DWORD*)buff = csize << (n - 9);
+				}
+				res = RES_OK;
+			}
+			break;
+
+		case GET_BLOCK_SIZE :	/* Get erase block size in unit of sector (DWORD) */
+			if (CardType & CT_SD2) {	/* SDv2? */
+				if (send_cmd(ACMD13, 0) == 0) {	/* Read SD status */
+					xchg_spi(0xFF);
+					if (rcvr_datablock(csd, 16)) {				/* Read partial block */
+						for (n = 64 - 16; n; n--) xchg_spi(0xFF);	/* Purge trailing data */
+						*(DWORD*)buff = 16UL << (csd[10] >> 4);
+						res = RES_OK;
+					}
+				}
+			} else {					/* SDv1 or MMCv3 */
+				if ((send_cmd(CMD9, 0) == 0) && rcvr_datablock(csd, 16)) {	/* Read CSD */
+					if (CardType & CT_SD1) {	/* SDv1 */
+						*(DWORD*)buff = (((csd[10] & 63) << 1) + ((WORD)(csd[11] & 128) >> 7) + 1) << ((csd[13] >> 6) - 1);
+					} else {					/* MMCv3 */
+						*(DWORD*)buff = ((WORD)((csd[10] & 124) >> 2) + 1) * (((csd[11] & 3) << 3) + ((csd[11] & 224) >> 5) + 1);
+					}
+					res = RES_OK;
+				}
+			}
+			break;
+
+		case CTRL_ERASE_SECTOR :	/* Erase a block of sectors (used when _USE_ERASE == 1) */
+			if (!(CardType & CT_SDC)) break;				/* Check if the card is SDC */
+			if (disk_ioctl(pdrv, MMC_GET_CSD, csd)) break;	/* Get CSD */
+			if (!(csd[0] >> 6) && !(csd[10] & 0x40)) break;	/* Check if sector erase can be applied to the card */
+			dp = buff; st = dp[0]; ed = dp[1];				/* Load sector block */
+			if (!(CardType & CT_BLOCK)) {
+				st *= 512; ed *= 512;
+			}
+			if (send_cmd(CMD32, st) == 0 && send_cmd(CMD33, ed) == 0 && send_cmd(CMD38, 0) == 0 && wait_ready(30000))	/* Erase sector block */
+				res = RES_OK;	/* FatFs does not check result of this command */
+			break;
+
+		/* Following commands are never used by FatFs module */
+
+		case MMC_GET_TYPE :		/* Get card type flags (1 byte) */
+			*ptr = CardType;
+			res = RES_OK;
+			break;
+
+		case MMC_GET_CSD :		/* Receive CSD as a data block (16 bytes) */
+			if (send_cmd(CMD9, 0) == 0		/* READ_CSD */
+				&& rcvr_datablock(ptr, 16))
+				res = RES_OK;
+			break;
+
+		case MMC_GET_CID :		/* Receive CID as a data block (16 bytes) */
+			if (send_cmd(CMD10, 0) == 0		/* READ_CID */
+				&& rcvr_datablock(ptr, 16))
+				res = RES_OK;
+			break;
+
+		case MMC_GET_OCR :		/* Receive OCR as an R3 resp (4 bytes) */
+			if (send_cmd(CMD58, 0) == 0) {	/* READ_OCR */
+				for (n = 4; n; n--) *ptr++ = xchg_spi(0xFF);
+				res = RES_OK;
+			}
+			break;
+
+		case MMC_GET_SDSTAT :	/* Receive SD statsu as a data block (64 bytes) */
+			if (send_cmd(ACMD13, 0) == 0) {	/* SD_STATUS */
+				xchg_spi(0xFF);
+				if (rcvr_datablock(ptr, 64))
+					res = RES_OK;
+			}
+			break;
+
+		default:
+			res = RES_PARERR;
+		}
+
+		deselect();
+	}
+
+	return res;
+}
+#endif
+
+
+/*-----------------------------------------------------------------------*/
+/* Device Timer Interrupt Procedure                                      */
+/*-----------------------------------------------------------------------*/
+/* This function must be called in period of 10ms                        */
+/*
+void disk_timerproc (void)
+{
+	BYTE n, s;
+
+
+	n = Timer1;
+	if (n) Timer1 = --n;
+	n = Timer2;
+	if (n) Timer2 = --n;
+
+	s = Stat;
+	s &= ~STA_PROTECT;
+	s &= ~STA_NODISK;
+	Stat = s;
+}
+*/
\ No newline at end of file
diff --git a/diskio.h b/diskio.h
new file mode 100644
index 0000000..580fbf7
--- /dev/null
+++ b/diskio.h
@@ -0,0 +1,88 @@
+/*-----------------------------------------------------------------------
+/  Low level disk interface modlue include file   (C)ChaN, 2013
+/-----------------------------------------------------------------------*/
+
+#ifndef _DISKIO_DEFINED
+#define _DISKIO_DEFINED
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define _USE_WRITE	1	/* 1: Enable disk_write function */
+#define _USE_IOCTL	1	/* 1: Enable disk_ioctl fucntion */
+
+#include "integer.h"
+
+
+/* Status of Disk Functions */
+typedef BYTE	DSTATUS;
+
+/* Results of Disk Functions */
+typedef enum {
+	RES_OK = 0,		/* 0: Successful */
+	RES_ERROR,		/* 1: R/W Error */
+	RES_WRPRT,		/* 2: Write Protected */
+	RES_NOTRDY,		/* 3: Not Ready */
+	RES_PARERR		/* 4: Invalid Parameter */
+} DRESULT;
+
+
+/*---------------------------------------*/
+/* Prototypes for disk control functions */
+
+
+DSTATUS disk_initialize (BYTE pdrv);
+DSTATUS disk_status (BYTE pdrv);
+DRESULT disk_read (BYTE pdrv, BYTE*buff, DWORD sector, BYTE count);
+DRESULT disk_write (BYTE pdrv, const BYTE* buff, DWORD sector, BYTE count);
+DRESULT disk_ioctl (BYTE pdrv, BYTE cmd, void* buff);
+
+
+/* Disk Status Bits (DSTATUS) */
+#define STA_NOINIT		0x01	/* Drive not initialized */
+#define STA_NODISK		0x02	/* No medium in the drive */
+#define STA_PROTECT		0x04	/* Write protected */
+
+
+/* Command code for disk_ioctrl fucntion */
+
+/* Generic command (used by FatFs) */
+#define CTRL_SYNC			0	/* Flush disk cache (for write functions) */
+#define GET_SECTOR_COUNT	1	/* Get media size (for only f_mkfs()) */
+#define GET_SECTOR_SIZE		2	/* Get sector size (for multiple sector size (_MAX_SS >= 1024)) */
+#define GET_BLOCK_SIZE		3	/* Get erase block size (for only f_mkfs()) */
+#define CTRL_ERASE_SECTOR	4	/* Force erased a block of sectors (for only _USE_ERASE) */
+
+/* Generic command (not used by FatFs) */
+#define CTRL_POWER			5	/* Get/Set power status */
+#define CTRL_LOCK			6	/* Lock/Unlock media removal */
+#define CTRL_EJECT			7	/* Eject media */
+#define CTRL_FORMAT			8	/* Create physical format on the media */
+
+/* MMC/SDC specific ioctl command */
+#define MMC_GET_TYPE		10	/* Get card type */
+#define MMC_GET_CSD			11	/* Get CSD */
+#define MMC_GET_CID			12	/* Get CID */
+#define MMC_GET_OCR			13	/* Get OCR */
+#define MMC_GET_SDSTAT		14	/* Get SD status */
+
+/* ATA/CF specific ioctl command */
+#define ATA_GET_REV			20	/* Get F/W revision */
+#define ATA_GET_MODEL		21	/* Get model name */
+#define ATA_GET_SN			22	/* Get serial number */
+
+
+/* MMC card type flags (MMC_GET_TYPE) */
+#define CT_MMC		0x01		/* MMC ver 3 */
+#define CT_SD1		0x02		/* SD ver 1 */
+#define CT_SD2		0x04		/* SD ver 2 */
+#define CT_SDC		(CT_SD1|CT_SD2)	/* SD */
+#define CT_BLOCK	0x08		/* Block addressing */
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/ff.c b/ff.c
new file mode 100644
index 0000000..7c9857c
--- /dev/null
+++ b/ff.c
@@ -0,0 +1,4325 @@
+/*----------------------------------------------------------------------------/
+/  FatFs - FAT file system module  R0.09b                 (C)ChaN, 2013
+/-----------------------------------------------------------------------------/
+/ FatFs module is a generic FAT file system module for small embedded systems.
+/ This is a free software that opened for education, research and commercial
+/ developments under license policy of following terms.
+/
+/  Copyright (C) 2013, ChaN, all right reserved.
+/
+/ * The FatFs module is a free software and there is NO WARRANTY.
+/ * No restriction on use. You can use, modify and redistribute it for
+/   personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY.
+/ * Redistributions of source code must retain the above copyright notice.
+/
+/-----------------------------------------------------------------------------/
+/ Feb 26,'06 R0.00  Prototype.
+/
+/ Apr 29,'06 R0.01  First stable version.
+/
+/ Jun 01,'06 R0.02  Added FAT12 support.
+/                   Removed unbuffered mode.
+/                   Fixed a problem on small (<32M) partition.
+/ Jun 10,'06 R0.02a Added a configuration option (_FS_MINIMUM).
+/
+/ Sep 22,'06 R0.03  Added f_rename().
+/                   Changed option _FS_MINIMUM to _FS_MINIMIZE.
+/ Dec 11,'06 R0.03a Improved cluster scan algorithm to write files fast.
+/                   Fixed f_mkdir() creates incorrect directory on FAT32.
+/
+/ Feb 04,'07 R0.04  Supported multiple drive system.
+/                   Changed some interfaces for multiple drive system.
+/                   Changed f_mountdrv() to f_mount().
+/                   Added f_mkfs().
+/ Apr 01,'07 R0.04a Supported multiple partitions on a physical drive.
+/                   Added a capability of extending file size to f_lseek().
+/                   Added minimization level 3.
+/                   Fixed an endian sensitive code in f_mkfs().
+/ May 05,'07 R0.04b Added a configuration option _USE_NTFLAG.
+/                   Added FSInfo support.
+/                   Fixed DBCS name can result FR_INVALID_NAME.
+/                   Fixed short seek (<= csize) collapses the file object.
+/
+/ Aug 25,'07 R0.05  Changed arguments of f_read(), f_write() and f_mkfs().
+/                   Fixed f_mkfs() on FAT32 creates incorrect FSInfo.
+/                   Fixed f_mkdir() on FAT32 creates incorrect directory.
+/ Feb 03,'08 R0.05a Added f_truncate() and f_utime().
+/                   Fixed off by one error at FAT sub-type determination.
+/                   Fixed btr in f_read() can be mistruncated.
+/                   Fixed cached sector is not flushed when create and close without write.
+/
+/ Apr 01,'08 R0.06  Added fputc(), fputs(), fprintf() and fgets().
+/                   Improved performance of f_lseek() on moving to the same or following cluster.
+/
+/ Apr 01,'09 R0.07  Merged Tiny-FatFs as a configuration option. (_FS_TINY)
+/                   Added long file name feature.
+/                   Added multiple code page feature.
+/                   Added re-entrancy for multitask operation.
+/                   Added auto cluster size selection to f_mkfs().
+/                   Added rewind option to f_readdir().
+/                   Changed result code of critical errors.
+/                   Renamed string functions to avoid name collision.
+/ Apr 14,'09 R0.07a Separated out OS dependent code on reentrant cfg.
+/                   Added multiple sector size feature.
+/ Jun 21,'09 R0.07c Fixed f_unlink() can return FR_OK on error.
+/                   Fixed wrong cache control in f_lseek().
+/                   Added relative path feature.
+/                   Added f_chdir() and f_chdrive().
+/                   Added proper case conversion to extended char.
+/ Nov 03,'09 R0.07e Separated out configuration options from ff.h to ffconf.h.
+/                   Fixed f_unlink() fails to remove a sub-dir on _FS_RPATH.
+/                   Fixed name matching error on the 13 char boundary.
+/                   Added a configuration option, _LFN_UNICODE.
+/                   Changed f_readdir() to return the SFN with always upper case on non-LFN cfg.
+/
+/ May 15,'10 R0.08  Added a memory configuration option. (_USE_LFN = 3)
+/                   Added file lock feature. (_FS_SHARE)
+/                   Added fast seek feature. (_USE_FASTSEEK)
+/                   Changed some types on the API, XCHAR->TCHAR.
+/                   Changed fname member in the FILINFO structure on Unicode cfg.
+/                   String functions support UTF-8 encoding files on Unicode cfg.
+/ Aug 16,'10 R0.08a Added f_getcwd(). (_FS_RPATH = 2)
+/                   Added sector erase feature. (_USE_ERASE)
+/                   Moved file lock semaphore table from fs object to the bss.
+/                   Fixed a wrong directory entry is created on non-LFN cfg when the given name contains ';'.
+/                   Fixed f_mkfs() creates wrong FAT32 volume.
+/ Jan 15,'11 R0.08b Fast seek feature is also applied to f_read() and f_write().
+/                   f_lseek() reports required table size on creating CLMP.
+/                   Extended format syntax of f_printf function.
+/                   Ignores duplicated directory separators in given path name.
+/
+/ Sep 06,'11 R0.09  f_mkfs() supports multiple partition to finish the multiple partition feature.
+/                   Added f_fdisk(). (_MULTI_PARTITION = 2)
+/ Aug 27,'12 R0.09a Fixed assertion failure due to OS/2 EA on FAT12/16 volume.
+/                   Changed f_open() and f_opendir reject null object pointer to avoid crash.
+/                   Changed option name _FS_SHARE to _FS_LOCK.
+/ Jan 24,'13 R0.09b Added f_setlabel() and f_getlabel(). (_USE_LABEL = 1)
+/---------------------------------------------------------------------------*/
+
+#include "ff.h"			/* FatFs configurations and declarations */
+#include "diskio.h"		/* Declarations of low level disk I/O functions */
+
+
+/*--------------------------------------------------------------------------
+
+   Module Private Definitions
+
+---------------------------------------------------------------------------*/
+
+#if _FATFS != 82786	/* Revision ID */
+#error Wrong include file (ff.h).
+#endif
+
+
+/* Definitions on sector size */
+#if _MAX_SS != 512 && _MAX_SS != 1024 && _MAX_SS != 2048 && _MAX_SS != 4096
+#error Wrong sector size.
+#endif
+#if _MAX_SS != 512
+#define	SS(fs)	((fs)->ssize)	/* Variable sector size */
+#else
+#define	SS(fs)	512U			/* Fixed sector size */
+#endif
+
+
+/* Reentrancy related */
+#if _FS_REENTRANT
+#if _USE_LFN == 1
+#error Static LFN work area must not be used in re-entrant configuration.
+#endif
+#define	ENTER_FF(fs)		{ if (!lock_fs(fs)) return FR_TIMEOUT; }
+#define	LEAVE_FF(fs, res)	{ unlock_fs(fs, res); return res; }
+#else
+#define	ENTER_FF(fs)
+#define LEAVE_FF(fs, res)	return res
+#endif
+
+#define	ABORT(fs, res)		{ fp->flag |= FA__ERROR; LEAVE_FF(fs, res); }
+
+
+/* File access control feature */
+#if _FS_LOCK
+#if _FS_READONLY
+#error _FS_LOCK must be 0 on read-only cfg.
+#endif
+typedef struct {
+	FATFS *fs;				/* File ID 1, volume (NULL:blank entry) */
+	DWORD clu;				/* File ID 2, directory */
+	WORD idx;				/* File ID 3, directory index */
+	WORD ctr;				/* File open counter, 0:none, 0x01..0xFF:read open count, 0x100:write mode */
+} FILESEM;
+#endif
+
+
+
+/* DBCS code ranges and SBCS extend char conversion table */
+
+#if _CODE_PAGE == 932	/* Japanese Shift-JIS */
+#define _DF1S	0x81	/* DBC 1st byte range 1 start */
+#define _DF1E	0x9F	/* DBC 1st byte range 1 end */
+#define _DF2S	0xE0	/* DBC 1st byte range 2 start */
+#define _DF2E	0xFC	/* DBC 1st byte range 2 end */
+#define _DS1S	0x40	/* DBC 2nd byte range 1 start */
+#define _DS1E	0x7E	/* DBC 2nd byte range 1 end */
+#define _DS2S	0x80	/* DBC 2nd byte range 2 start */
+#define _DS2E	0xFC	/* DBC 2nd byte range 2 end */
+
+#elif _CODE_PAGE == 936	/* Simplified Chinese GBK */
+#define _DF1S	0x81
+#define _DF1E	0xFE
+#define _DS1S	0x40
+#define _DS1E	0x7E
+#define _DS2S	0x80
+#define _DS2E	0xFE
+
+#elif _CODE_PAGE == 949	/* Korean */
+#define _DF1S	0x81
+#define _DF1E	0xFE
+#define _DS1S	0x41
+#define _DS1E	0x5A
+#define _DS2S	0x61
+#define _DS2E	0x7A
+#define _DS3S	0x81
+#define _DS3E	0xFE
+
+#elif _CODE_PAGE == 950	/* Traditional Chinese Big5 */
+#define _DF1S	0x81
+#define _DF1E	0xFE
+#define _DS1S	0x40
+#define _DS1E	0x7E
+#define _DS2S	0xA1
+#define _DS2E	0xFE
+
+#elif _CODE_PAGE == 437	/* U.S. (OEM) */
+#define _DF1S	0
+#define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F,0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
+				0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
+				0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
+
+#elif _CODE_PAGE == 720	/* Arabic (OEM) */
+#define _DF1S	0
+#define _EXCVT {0x80,0x81,0x45,0x41,0x84,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x8E,0x8F,0x90,0x92,0x92,0x93,0x94,0x95,0x49,0x49,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
+				0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
+				0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
+
+#elif _CODE_PAGE == 737	/* Greek (OEM) */
+#define _DF1S	0
+#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \
+				0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
+				0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xE7,0xE8,0xF1,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
+
+#elif _CODE_PAGE == 775	/* Baltic (OEM) */
+#define _DF1S	0
+#define _EXCVT {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
+				0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
+				0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
+
+#elif _CODE_PAGE == 850	/* Multilingual Latin 1 (OEM) */
+#define _DF1S	0
+#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0xDE,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x59,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
+				0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
+				0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE7,0xE9,0xEA,0xEB,0xED,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
+
+#elif _CODE_PAGE == 852	/* Latin 2 (OEM) */
+#define _DF1S	0
+#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F,0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0x9F, \
+				0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \
+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
+				0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF}
+
+#elif _CODE_PAGE == 855	/* Cyrillic (OEM) */
+#define _DF1S	0
+#define _EXCVT {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F,0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \
+				0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \
+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \
+				0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF}
+
+#elif _CODE_PAGE == 857	/* Turkish (OEM) */
+#define _DF1S	0
+#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x98,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \
+				0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
+				0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0x59,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
+
+#elif _CODE_PAGE == 858	/* Multilingual Latin 1 + Euro (OEM) */
+#define _DF1S	0
+#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0xDE,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x59,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
+				0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
+				0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE7,0xE9,0xEA,0xEB,0xED,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
+
+#elif _CODE_PAGE == 862	/* Hebrew (OEM) */
+#define _DF1S	0
+#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
+				0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
+				0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
+
+#elif _CODE_PAGE == 866	/* Russian (OEM) */
+#define _DF1S	0
+#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
+				0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
+				0x90,0x91,0x92,0x93,0x9d,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F,0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
+
+#elif _CODE_PAGE == 874	/* Thai (OEM, Windows) */
+#define _DF1S	0
+#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
+				0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
+				0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
+
+#elif _CODE_PAGE == 1250 /* Central Europe (Windows) */
+#define _DF1S	0
+#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x8D,0x8E,0x8F, \
+				0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xA3,0xB4,0xB5,0xB6,0xB7,0xB8,0xA5,0xAA,0xBB,0xBC,0xBD,0xBC,0xAF, \
+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xFF}
+
+#elif _CODE_PAGE == 1251 /* Cyrillic (Windows) */
+#define _DF1S	0
+#define _EXCVT {0x80,0x81,0x82,0x82,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x80,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x8D,0x8E,0x8F, \
+				0xA0,0xA2,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB2,0xA5,0xB5,0xB6,0xB7,0xA8,0xB9,0xAA,0xBB,0xA3,0xBD,0xBD,0xAF, \
+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF}
+
+#elif _CODE_PAGE == 1252 /* Latin 1 (Windows) */
+#define _DF1S	0
+#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0xAd,0x9B,0x8C,0x9D,0xAE,0x9F, \
+				0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0x9F}
+
+#elif _CODE_PAGE == 1253 /* Greek (Windows) */
+#define _DF1S	0
+#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
+				0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xA2,0xB8,0xB9,0xBA, \
+				0xE0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xF2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xFB,0xBC,0xFD,0xBF,0xFF}
+
+#elif _CODE_PAGE == 1254 /* Turkish (Windows) */
+#define _DF1S	0
+#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x9D,0x9E,0x9F, \
+				0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0x9F}
+
+#elif _CODE_PAGE == 1255 /* Hebrew (Windows) */
+#define _DF1S	0
+#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
+				0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
+				0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
+
+#elif _CODE_PAGE == 1256 /* Arabic (Windows) */
+#define _DF1S	0
+#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x8C,0x9D,0x9E,0x9F, \
+				0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
+				0x41,0xE1,0x41,0xE3,0xE4,0xE5,0xE6,0x43,0x45,0x45,0x45,0x45,0xEC,0xED,0x49,0x49,0xF0,0xF1,0xF2,0xF3,0x4F,0xF5,0xF6,0xF7,0xF8,0x55,0xFA,0x55,0x55,0xFD,0xFE,0xFF}
+
+#elif _CODE_PAGE == 1257 /* Baltic (Windows) */
+#define _DF1S	0
+#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
+				0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xA8,0xB9,0xAA,0xBB,0xBC,0xBD,0xBE,0xAF, \
+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xFF}
+
+#elif _CODE_PAGE == 1258 /* Vietnam (OEM, Windows) */
+#define _DF1S	0
+#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0xAC,0x9D,0x9E,0x9F, \
+				0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
+				0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xEC,0xCD,0xCE,0xCF,0xD0,0xD1,0xF2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xFE,0x9F}
+
+#elif _CODE_PAGE == 1	/* ASCII (for only non-LFN cfg) */
+#if _USE_LFN
+#error Cannot use LFN feature without valid code page.
+#endif
+#define _DF1S	0
+
+#else
+#error Unknown code page
+
+#endif
+
+
+/* Character code support macros */
+#define IsUpper(c)	(((c)>='A')&&((c)<='Z'))
+#define IsLower(c)	(((c)>='a')&&((c)<='z'))
+#define IsDigit(c)	(((c)>='0')&&((c)<='9'))
+
+#if _DF1S		/* Code page is DBCS */
+
+#ifdef _DF2S	/* Two 1st byte areas */
+#define IsDBCS1(c)	(((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E))
+#else			/* One 1st byte area */
+#define IsDBCS1(c)	((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E)
+#endif
+
+#ifdef _DS3S	/* Three 2nd byte areas */
+#define IsDBCS2(c)	(((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E))
+#else			/* Two 2nd byte areas */
+#define IsDBCS2(c)	(((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E))
+#endif
+
+#else			/* Code page is SBCS */
+
+#define IsDBCS1(c)	0
+#define IsDBCS2(c)	0
+
+#endif /* _DF1S */
+
+
+/* Name status flags */
+#define NS			11		/* Index of name status byte in fn[] */
+#define NS_LOSS		0x01	/* Out of 8.3 format */
+#define NS_LFN		0x02	/* Force to create LFN entry */
+#define NS_LAST		0x04	/* Last segment */
+#define NS_BODY		0x08	/* Lower case flag (body) */
+#define NS_EXT		0x10	/* Lower case flag (ext) */
+#define NS_DOT		0x20	/* Dot entry */
+
+
+/* FAT sub-type boundaries */
+/* Note that the FAT spec by Microsoft says 4085 but Windows works with 4087! */
+#define MIN_FAT16	4086	/* Minimum number of clusters for FAT16 */
+#define	MIN_FAT32	65526	/* Minimum number of clusters for FAT32 */
+
+
+/* FatFs refers the members in the FAT structures as byte array instead of
+/ structure member because the structure is not binary compatible between
+/ different platforms */
+
+#define BS_jmpBoot			0	/* Jump instruction (3) */
+#define BS_OEMName			3	/* OEM name (8) */
+#define BPB_BytsPerSec		11	/* Sector size [byte] (2) */
+#define BPB_SecPerClus		13	/* Cluster size [sector] (1) */
+#define BPB_RsvdSecCnt		14	/* Size of reserved area [sector] (2) */
+#define BPB_NumFATs			16	/* Number of FAT copies (1) */
+#define BPB_RootEntCnt		17	/* Number of root dir entries for FAT12/16 (2) */
+#define BPB_TotSec16		19	/* Volume size [sector] (2) */
+#define BPB_Media			21	/* Media descriptor (1) */
+#define BPB_FATSz16			22	/* FAT size [sector] (2) */
+#define BPB_SecPerTrk		24	/* Track size [sector] (2) */
+#define BPB_NumHeads		26	/* Number of heads (2) */
+#define BPB_HiddSec			28	/* Number of special hidden sectors (4) */
+#define BPB_TotSec32		32	/* Volume size [sector] (4) */
+#define BS_DrvNum			36	/* Physical drive number (2) */
+#define BS_BootSig			38	/* Extended boot signature (1) */
+#define BS_VolID			39	/* Volume serial number (4) */
+#define BS_VolLab			43	/* Volume label (8) */
+#define BS_FilSysType		54	/* File system type (1) */
+#define BPB_FATSz32			36	/* FAT size [sector] (4) */
+#define BPB_ExtFlags		40	/* Extended flags (2) */
+#define BPB_FSVer			42	/* File system version (2) */
+#define BPB_RootClus		44	/* Root dir first cluster (4) */
+#define BPB_FSInfo			48	/* Offset of FSInfo sector (2) */
+#define BPB_BkBootSec		50	/* Offset of backup boot sector (2) */
+#define BS_DrvNum32			64	/* Physical drive number (2) */
+#define BS_BootSig32		66	/* Extended boot signature (1) */
+#define BS_VolID32			67	/* Volume serial number (4) */
+#define BS_VolLab32			71	/* Volume label (8) */
+#define BS_FilSysType32		82	/* File system type (1) */
+#define	FSI_LeadSig			0	/* FSI: Leading signature (4) */
+#define	FSI_StrucSig		484	/* FSI: Structure signature (4) */
+#define	FSI_Free_Count		488	/* FSI: Number of free clusters (4) */
+#define	FSI_Nxt_Free		492	/* FSI: Last allocated cluster (4) */
+#define MBR_Table			446	/* MBR: Partition table offset (2) */
+#define	SZ_PTE				16	/* MBR: Size of a partition table entry */
+#define BS_55AA				510	/* Boot sector signature (2) */
+
+#define	DIR_Name			0	/* Short file name (11) */
+#define	DIR_Attr			11	/* Attribute (1) */
+#define	DIR_NTres			12	/* NT flag (1) */
+#define DIR_CrtTimeTenth	13	/* Created time sub-second (1) */
+#define	DIR_CrtTime			14	/* Created time (2) */
+#define	DIR_CrtDate			16	/* Created date (2) */
+#define DIR_LstAccDate		18	/* Last accessed date (2) */
+#define	DIR_FstClusHI		20	/* Higher 16-bit of first cluster (2) */
+#define	DIR_WrtTime			22	/* Modified time (2) */
+#define	DIR_WrtDate			24	/* Modified date (2) */
+#define	DIR_FstClusLO		26	/* Lower 16-bit of first cluster (2) */
+#define	DIR_FileSize		28	/* File size (4) */
+#define	LDIR_Ord			0	/* LFN entry order and LLE flag (1) */
+#define	LDIR_Attr			11	/* LFN attribute (1) */
+#define	LDIR_Type			12	/* LFN type (1) */
+#define	LDIR_Chksum			13	/* Sum of corresponding SFN entry */
+#define	LDIR_FstClusLO		26	/* Filled by zero (0) */
+#define	SZ_DIR				32		/* Size of a directory entry */
+#define	LLE					0x40	/* Last long entry flag in LDIR_Ord */
+#define	DDE					0xE5	/* Deleted directory entry mark in DIR_Name[0] */
+#define	NDDE				0x05	/* Replacement of the character collides with DDE */
+
+
+/*------------------------------------------------------------*/
+/* Module private work area                                   */
+/*------------------------------------------------------------*/
+/* Note that uninitialized variables with static duration are
+/  zeroed/nulled at start-up. If not, the compiler or start-up
+/  routine is out of ANSI-C standard.
+*/
+
+#if _VOLUMES
+static
+FATFS *FatFs[_VOLUMES];	/* Pointer to the file system objects (logical drives) */
+#else
+#error Number of volumes must not be 0.
+#endif
+
+static
+WORD Fsid;				/* File system mount ID */
+
+#if _FS_RPATH
+static
+BYTE CurrVol;			/* Current drive */
+#endif
+
+#if _FS_LOCK
+static
+FILESEM	Files[_FS_LOCK];	/* File lock semaphores */
+#endif
+
+#if _USE_LFN == 0			/* No LFN feature */
+#define	DEF_NAMEBUF			BYTE sfn[12]
+#define INIT_BUF(dobj)		(dobj).fn = sfn
+#define	FREE_BUF()
+
+#elif _USE_LFN == 1			/* LFN feature with static working buffer */
+static WCHAR LfnBuf[_MAX_LFN+1];
+#define	DEF_NAMEBUF			BYTE sfn[12]
+#define INIT_BUF(dobj)		{ (dobj).fn = sfn; (dobj).lfn = LfnBuf; }
+#define	FREE_BUF()
+
+#elif _USE_LFN == 2 		/* LFN feature with dynamic working buffer on the stack */
+#define	DEF_NAMEBUF			BYTE sfn[12]; WCHAR lbuf[_MAX_LFN+1]
+#define INIT_BUF(dobj)		{ (dobj).fn = sfn; (dobj).lfn = lbuf; }
+#define	FREE_BUF()
+
+#elif _USE_LFN == 3 		/* LFN feature with dynamic working buffer on the heap */
+#define	DEF_NAMEBUF			BYTE sfn[12]; WCHAR *lfn
+#define INIT_BUF(dobj)		{ lfn = ff_memalloc((_MAX_LFN + 1) * 2); \
+							  if (!lfn) LEAVE_FF((dobj).fs, FR_NOT_ENOUGH_CORE); \
+							  (dobj).lfn = lfn;	(dobj).fn = sfn; }
+#define	FREE_BUF()			ff_memfree(lfn)
+
+#else
+#error Wrong LFN configuration.
+#endif
+
+
+#ifdef _EXCVT
+static
+const BYTE ExCvt[] = _EXCVT;	/* Upper conversion table for extended chars */
+#endif
+
+
+
+
+
+
+/*--------------------------------------------------------------------------
+
+   Module Private Functions
+
+---------------------------------------------------------------------------*/
+
+
+/*-----------------------------------------------------------------------*/
+/* String functions                                                      */
+/*-----------------------------------------------------------------------*/
+
+/* Copy memory to memory */
+static
+void mem_cpy (void* dst, const void* src, UINT cnt) {
+	BYTE *d = (BYTE*)dst;
+	const BYTE *s = (const BYTE*)src;
+
+#if _WORD_ACCESS == 1
+	while (cnt >= sizeof (int)) {
+		*(int*)d = *(int*)s;
+		d += sizeof (int); s += sizeof (int);
+		cnt -= sizeof (int);
+	}
+#endif
+	while (cnt--)
+		*d++ = *s++;
+}
+
+/* Fill memory */
+static
+void mem_set (void* dst, int val, UINT cnt) {
+	BYTE *d = (BYTE*)dst;
+
+	while (cnt--)
+		*d++ = (BYTE)val;
+}
+
+/* Compare memory to memory */
+static
+int mem_cmp (const void* dst, const void* src, UINT cnt) {
+	const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src;
+	int r = 0;
+
+	while (cnt-- && (r = *d++ - *s++) == 0) ;
+	return r;
+}
+
+/* Check if chr is contained in the string */
+static
+int chk_chr (const char* str, int chr) {
+	while (*str && *str != chr) str++;
+	return *str;
+}
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Request/Release grant to access the volume                            */
+/*-----------------------------------------------------------------------*/
+#if _FS_REENTRANT
+
+static
+int lock_fs (
+	FATFS *fs		/* File system object */
+)
+{
+	return ff_req_grant(fs->sobj);
+}
+
+
+static
+void unlock_fs (
+	FATFS *fs,		/* File system object */
+	FRESULT res		/* Result code to be returned */
+)
+{
+	if (fs &&
+		res != FR_NOT_ENABLED &&
+		res != FR_INVALID_DRIVE &&
+		res != FR_INVALID_OBJECT &&
+		res != FR_TIMEOUT) {
+		ff_rel_grant(fs->sobj);
+	}
+}
+#endif
+
+
+
+/*-----------------------------------------------------------------------*/
+/* File lock control functions                                           */
+/*-----------------------------------------------------------------------*/
+#if _FS_LOCK
+
+static
+FRESULT chk_lock (	/* Check if the file can be accessed */
+	DIR* dj,		/* Directory object pointing the file to be checked */
+	int acc			/* Desired access (0:Read, 1:Write, 2:Delete/Rename) */
+)
+{
+	UINT i, be;
+
+	/* Search file semaphore table */
+	for (i = be = 0; i < _FS_LOCK; i++) {
+		if (Files[i].fs) {	/* Existing entry */
+			if (Files[i].fs == dj->fs &&	 	/* Check if the file matched with an open file */
+				Files[i].clu == dj->sclust &&
+				Files[i].idx == dj->index) break;
+		} else {			/* Blank entry */
+			be++;
+		}
+	}
+	if (i == _FS_LOCK)	/* The file is not opened */
+		return (be || acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES;	/* Is there a blank entry for new file? */
+
+	/* The file has been opened. Reject any open against writing file and all write mode open */
+	return (acc || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK;
+}
+
+
+static
+int enq_lock (void)	/* Check if an entry is available for a new file */
+{
+	UINT i;
+
+	for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;
+	return (i == _FS_LOCK) ? 0 : 1;
+}
+
+
+static
+UINT inc_lock (	/* Increment file open counter and returns its index (0:int error) */
+	DIR* dj,	/* Directory object pointing the file to register or increment */
+	int acc		/* Desired access mode (0:Read, !0:Write) */
+)
+{
+	UINT i;
+
+
+	for (i = 0; i < _FS_LOCK; i++) {	/* Find the file */
+		if (Files[i].fs == dj->fs &&
+			Files[i].clu == dj->sclust &&
+			Files[i].idx == dj->index) break;
+	}
+
+	if (i == _FS_LOCK) {				/* Not opened. Register it as new. */
+		for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;
+		if (i == _FS_LOCK) return 0;	/* No space to register (int err) */
+		Files[i].fs = dj->fs;
+		Files[i].clu = dj->sclust;
+		Files[i].idx = dj->index;
+		Files[i].ctr = 0;
+	}
+
+	if (acc && Files[i].ctr) return 0;	/* Access violation (int err) */
+
+	Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1;	/* Set semaphore value */
+
+	return i + 1;
+}
+
+
+static
+FRESULT dec_lock (	/* Decrement file open counter */
+	UINT i			/* Semaphore index */
+)
+{
+	WORD n;
+	FRESULT res;
+
+
+	if (--i < _FS_LOCK) {
+		n = Files[i].ctr;
+		if (n == 0x100) n = 0;
+		if (n) n--;
+		Files[i].ctr = n;
+		if (!n) Files[i].fs = 0;
+		res = FR_OK;
+	} else {
+		res = FR_INT_ERR;
+	}
+	return res;
+}
+
+
+static
+void clear_lock (	/* Clear lock entries of the volume */
+	FATFS *fs
+)
+{
+	UINT i;
+
+	for (i = 0; i < _FS_LOCK; i++) {
+		if (Files[i].fs == fs) Files[i].fs = 0;
+	}
+}
+#endif
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Move/Flush disk access window                                         */
+/*-----------------------------------------------------------------------*/
+
+
+#if !_FS_READONLY
+static
+FRESULT sync_window (
+	FATFS *fs		/* File system object */
+)
+{
+	DWORD wsect;
+	UINT nf;
+
+	
+	if (fs->wflag) {	/* Write back the sector if it is dirty */
+		wsect = fs->winsect;	/* Current sector number */
+		if (disk_write(fs->drv, fs->win, wsect, 1) != RES_OK)
+			return FR_DISK_ERR;
+		fs->wflag = 0;
+		if (wsect >= fs->fatbase && wsect < (fs->fatbase + fs->fsize)) {	/* In FAT area? */
+			for (nf = fs->n_fats; nf >= 2; nf--) {	/* Reflect the change to all FAT copies */
+				wsect += fs->fsize;
+				disk_write(fs->drv, fs->win, wsect, 1);
+			}
+		}
+	}
+	return FR_OK;
+}
+#endif
+
+
+static
+FRESULT move_window (
+	FATFS *fs,		/* File system object */
+	DWORD sector	/* Sector number to make appearance in the fs->win[] */
+)
+{
+	if (sector != fs->winsect) {	/* Changed current window */
+#if !_FS_READONLY
+		if (sync_window(fs) != FR_OK)
+			return FR_DISK_ERR;
+#endif
+		if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK)
+			return FR_DISK_ERR;
+		fs->winsect = sector;
+	}
+
+	return FR_OK;
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Synchronize file system and strage device                             */
+/*-----------------------------------------------------------------------*/
+#if !_FS_READONLY
+static
+FRESULT sync_fs (	/* FR_OK: successful, FR_DISK_ERR: failed */
+	FATFS *fs		/* File system object */
+)
+{
+	FRESULT res;
+
+
+	res = sync_window(fs);
+	if (res == FR_OK) {
+		/* Update FSInfo sector if needed */
+		if (fs->fs_type == FS_FAT32 && fs->fsi_flag) {
+			fs->winsect = 0;
+			/* Create FSInfo structure */
+			mem_set(fs->win, 0, 512);
+			ST_WORD(fs->win+BS_55AA, 0xAA55);
+			ST_DWORD(fs->win+FSI_LeadSig, 0x41615252);
+			ST_DWORD(fs->win+FSI_StrucSig, 0x61417272);
+			ST_DWORD(fs->win+FSI_Free_Count, fs->free_clust);
+			ST_DWORD(fs->win+FSI_Nxt_Free, fs->last_clust);
+			/* Write it into the FSInfo sector */
+			disk_write(fs->drv, fs->win, fs->fsi_sector, 1);
+			fs->fsi_flag = 0;
+		}
+		/* Make sure that no pending write process in the physical drive */
+		if (disk_ioctl(fs->drv, CTRL_SYNC, 0) != RES_OK)
+			res = FR_DISK_ERR;
+	}
+
+	return res;
+}
+#endif
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Get sector# from cluster#                                             */
+/*-----------------------------------------------------------------------*/
+
+
+DWORD clust2sect (	/* !=0: Sector number, 0: Failed - invalid cluster# */
+	FATFS *fs,		/* File system object */
+	DWORD clst		/* Cluster# to be converted */
+)
+{
+	clst -= 2;
+	if (clst >= (fs->n_fatent - 2)) return 0;		/* Invalid cluster# */
+	return clst * fs->csize + fs->database;
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* FAT access - Read value of a FAT entry                                */
+/*-----------------------------------------------------------------------*/
+
+
+DWORD get_fat (	/* 0xFFFFFFFF:Disk error, 1:Internal error, Else:Cluster status */
+	FATFS *fs,	/* File system object */
+	DWORD clst	/* Cluster# to get the link information */
+)
+{
+	UINT wc, bc;
+	BYTE *p;
+
+
+	if (clst < 2 || clst >= fs->n_fatent)	/* Check range */
+		return 1;
+
+	switch (fs->fs_type) {
+	case FS_FAT12 :
+		bc = (UINT)clst; bc += bc / 2;
+		if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break;
+		wc = fs->win[bc % SS(fs)]; bc++;
+		if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break;
+		wc |= fs->win[bc % SS(fs)] << 8;
+		return (clst & 1) ? (wc >> 4) : (wc & 0xFFF);
+
+	case FS_FAT16 :
+		if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)))) break;
+		p = &fs->win[clst * 2 % SS(fs)];
+		return LD_WORD(p);
+
+	case FS_FAT32 :
+		if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)))) break;
+		p = &fs->win[clst * 4 % SS(fs)];
+		return LD_DWORD(p) & 0x0FFFFFFF;
+	}
+
+	return 0xFFFFFFFF;	/* An error occurred at the disk I/O layer */
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* FAT access - Change value of a FAT entry                              */
+/*-----------------------------------------------------------------------*/
+#if !_FS_READONLY
+
+FRESULT put_fat (
+	FATFS *fs,	/* File system object */
+	DWORD clst,	/* Cluster# to be changed in range of 2 to fs->n_fatent - 1 */
+	DWORD val	/* New value to mark the cluster */
+)
+{
+	UINT bc;
+	BYTE *p;
+	FRESULT res;
+
+
+	if (clst < 2 || clst >= fs->n_fatent) {	/* Check range */
+		res = FR_INT_ERR;
+
+	} else {
+		switch (fs->fs_type) {
+		case FS_FAT12 :
+			bc = (UINT)clst; bc += bc / 2;
+			res = move_window(fs, fs->fatbase + (bc / SS(fs)));
+			if (res != FR_OK) break;
+			p = &fs->win[bc % SS(fs)];
+			*p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val;
+			bc++;
+			fs->wflag = 1;
+			res = move_window(fs, fs->fatbase + (bc / SS(fs)));
+			if (res != FR_OK) break;
+			p = &fs->win[bc % SS(fs)];
+			*p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F));
+			break;
+
+		case FS_FAT16 :
+			res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)));
+			if (res != FR_OK) break;
+			p = &fs->win[clst * 2 % SS(fs)];
+			ST_WORD(p, (WORD)val);
+			break;
+
+		case FS_FAT32 :
+			res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)));
+			if (res != FR_OK) break;
+			p = &fs->win[clst * 4 % SS(fs)];
+			val |= LD_DWORD(p) & 0xF0000000;
+			ST_DWORD(p, val);
+			break;
+
+		default :
+			res = FR_INT_ERR;
+		}
+		fs->wflag = 1;
+	}
+
+	return res;
+}
+#endif /* !_FS_READONLY */
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* FAT handling - Remove a cluster chain                                 */
+/*-----------------------------------------------------------------------*/
+#if !_FS_READONLY
+static
+FRESULT remove_chain (
+	FATFS *fs,			/* File system object */
+	DWORD clst			/* Cluster# to remove a chain from */
+)
+{
+	FRESULT res;
+	DWORD nxt;
+#if _USE_ERASE
+	DWORD scl = clst, ecl = clst, rt[2];
+#endif
+
+	if (clst < 2 || clst >= fs->n_fatent) {	/* Check range */
+		res = FR_INT_ERR;
+
+	} else {
+		res = FR_OK;
+		while (clst < fs->n_fatent) {			/* Not a last link? */
+			nxt = get_fat(fs, clst);			/* Get cluster status */
+			if (nxt == 0) break;				/* Empty cluster? */
+			if (nxt == 1) { res = FR_INT_ERR; break; }	/* Internal error? */
+			if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }	/* Disk error? */
+			res = put_fat(fs, clst, 0);			/* Mark the cluster "empty" */
+			if (res != FR_OK) break;
+			if (fs->free_clust != 0xFFFFFFFF) {	/* Update FSInfo */
+				fs->free_clust++;
+				fs->fsi_flag = 1;
+			}
+#if _USE_ERASE
+			if (ecl + 1 == nxt) {	/* Is next cluster contiguous? */
+				ecl = nxt;
+			} else {				/* End of contiguous clusters */ 
+				rt[0] = clust2sect(fs, scl);					/* Start sector */
+				rt[1] = clust2sect(fs, ecl) + fs->csize - 1;	/* End sector */
+				disk_ioctl(fs->drv, CTRL_ERASE_SECTOR, rt);		/* Erase the block */
+				scl = ecl = nxt;
+			}
+#endif
+			clst = nxt;	/* Next cluster */
+		}
+	}
+
+	return res;
+}
+#endif
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* FAT handling - Stretch or Create a cluster chain                      */
+/*-----------------------------------------------------------------------*/
+#if !_FS_READONLY
+static
+DWORD create_chain (	/* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */
+	FATFS *fs,			/* File system object */
+	DWORD clst			/* Cluster# to stretch. 0 means create a new chain. */
+)
+{
+	DWORD cs, ncl, scl;
+	FRESULT res;
+
+
+	if (clst == 0) {		/* Create a new chain */
+		scl = fs->last_clust;			/* Get suggested start point */
+		if (!scl || scl >= fs->n_fatent) scl = 1;
+	}
+	else {					/* Stretch the current chain */
+		cs = get_fat(fs, clst);			/* Check the cluster status */
+		if (cs < 2) return 1;			/* It is an invalid cluster */
+		if (cs < fs->n_fatent) return cs;	/* It is already followed by next cluster */
+		scl = clst;
+	}
+
+	ncl = scl;				/* Start cluster */
+	for (;;) {
+		ncl++;							/* Next cluster */
+		if (ncl >= fs->n_fatent) {		/* Wrap around */
+			ncl = 2;
+			if (ncl > scl) return 0;	/* No free cluster */
+		}
+		cs = get_fat(fs, ncl);			/* Get the cluster status */
+		if (cs == 0) break;				/* Found a free cluster */
+		if (cs == 0xFFFFFFFF || cs == 1)/* An error occurred */
+			return cs;
+		if (ncl == scl) return 0;		/* No free cluster */
+	}
+
+	res = put_fat(fs, ncl, 0x0FFFFFFF);	/* Mark the new cluster "last link" */
+	if (res == FR_OK && clst != 0) {
+		res = put_fat(fs, clst, ncl);	/* Link it to the previous one if needed */
+	}
+	if (res == FR_OK) {
+		fs->last_clust = ncl;			/* Update FSINFO */
+		if (fs->free_clust != 0xFFFFFFFF) {
+			fs->free_clust--;
+			fs->fsi_flag = 1;
+		}
+	} else {
+		ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1;
+	}
+
+	return ncl;		/* Return new cluster number or error code */
+}
+#endif /* !_FS_READONLY */
+
+
+
+/*-----------------------------------------------------------------------*/
+/* FAT handling - Convert offset into cluster with link map table        */
+/*-----------------------------------------------------------------------*/
+
+#if _USE_FASTSEEK
+static
+DWORD clmt_clust (	/* <2:Error, >=2:Cluster number */
+	FIL* fp,		/* Pointer to the file object */
+	DWORD ofs		/* File offset to be converted to cluster# */
+)
+{
+	DWORD cl, ncl, *tbl;
+
+
+	tbl = fp->cltbl + 1;	/* Top of CLMT */
+	cl = ofs / SS(fp->fs) / fp->fs->csize;	/* Cluster order from top of the file */
+	for (;;) {
+		ncl = *tbl++;			/* Number of cluters in the fragment */
+		if (!ncl) return 0;		/* End of table? (error) */
+		if (cl < ncl) break;	/* In this fragment? */
+		cl -= ncl; tbl++;		/* Next fragment */
+	}
+	return cl + *tbl;	/* Return the cluster number */
+}
+#endif	/* _USE_FASTSEEK */
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Directory handling - Set directory index                              */
+/*-----------------------------------------------------------------------*/
+
+static
+FRESULT dir_sdi (
+	DIR *dj,		/* Pointer to directory object */
+	WORD idx		/* Index of directory table */
+)
+{
+	DWORD clst;
+	WORD ic;
+
+
+	dj->index = idx;
+	clst = dj->sclust;
+	if (clst == 1 || clst >= dj->fs->n_fatent)	/* Check start cluster range */
+		return FR_INT_ERR;
+	if (!clst && dj->fs->fs_type == FS_FAT32)	/* Replace cluster# 0 with root cluster# if in FAT32 */
+		clst = dj->fs->dirbase;
+
+	if (clst == 0) {	/* Static table (root-dir in FAT12/16) */
+		dj->clust = clst;
+		if (idx >= dj->fs->n_rootdir)		/* Index is out of range */
+			return FR_INT_ERR;
+		dj->sect = dj->fs->dirbase + idx / (SS(dj->fs) / SZ_DIR);	/* Sector# */
+	}
+	else {				/* Dynamic table (sub-dirs or root-dir in FAT32) */
+		ic = SS(dj->fs) / SZ_DIR * dj->fs->csize;	/* Entries per cluster */
+		while (idx >= ic) {	/* Follow cluster chain */
+			clst = get_fat(dj->fs, clst);				/* Get next cluster */
+			if (clst == 0xFFFFFFFF) return FR_DISK_ERR;	/* Disk error */
+			if (clst < 2 || clst >= dj->fs->n_fatent)	/* Reached to end of table or int error */
+				return FR_INT_ERR;
+			idx -= ic;
+		}
+		dj->clust = clst;
+		dj->sect = clust2sect(dj->fs, clst) + idx / (SS(dj->fs) / SZ_DIR);	/* Sector# */
+	}
+
+	dj->dir = dj->fs->win + (idx % (SS(dj->fs) / SZ_DIR)) * SZ_DIR;	/* Ptr to the entry in the sector */
+
+	return FR_OK;	/* Seek succeeded */
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Directory handling - Move directory table index next                  */
+/*-----------------------------------------------------------------------*/
+
+static
+FRESULT dir_next (	/* FR_OK:Succeeded, FR_NO_FILE:End of table, FR_DENIED:Could not stretch */
+	DIR *dj,		/* Pointer to the directory object */
+	int stretch		/* 0: Do not stretch table, 1: Stretch table if needed */
+)
+{
+	DWORD clst;
+	WORD i;
+
+
+	stretch = stretch;		/* To suppress warning on read-only cfg. */
+	i = dj->index + 1;
+	if (!i || !dj->sect)	/* Report EOT when index has reached 65535 */
+		return FR_NO_FILE;
+
+	if (!(i % (SS(dj->fs) / SZ_DIR))) {	/* Sector changed? */
+		dj->sect++;					/* Next sector */
+
+		if (dj->clust == 0) {	/* Static table */
+			if (i >= dj->fs->n_rootdir)	/* Report EOT when end of table */
+				return FR_NO_FILE;
+		}
+		else {					/* Dynamic table */
+			if (((i / (SS(dj->fs) / SZ_DIR)) & (dj->fs->csize - 1)) == 0) {	/* Cluster changed? */
+				clst = get_fat(dj->fs, dj->clust);				/* Get next cluster */
+				if (clst <= 1) return FR_INT_ERR;
+				if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
+				if (clst >= dj->fs->n_fatent) {					/* When it reached end of dynamic table */
+#if !_FS_READONLY
+					BYTE c;
+					if (!stretch) return FR_NO_FILE;			/* When do not stretch, report EOT */
+					clst = create_chain(dj->fs, dj->clust);		/* Stretch cluster chain */
+					if (clst == 0) return FR_DENIED;			/* No free cluster */
+					if (clst == 1) return FR_INT_ERR;
+					if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
+					/* Clean-up stretched table */
+					if (sync_window(dj->fs)) return FR_DISK_ERR;	/* Flush active window */
+					mem_set(dj->fs->win, 0, SS(dj->fs));			/* Clear window buffer */
+					dj->fs->winsect = clust2sect(dj->fs, clst);	/* Cluster start sector */
+					for (c = 0; c < dj->fs->csize; c++) {		/* Fill the new cluster with 0 */
+						dj->fs->wflag = 1;
+						if (sync_window(dj->fs)) return FR_DISK_ERR;
+						dj->fs->winsect++;
+					}
+					dj->fs->winsect -= c;						/* Rewind window address */
+#else
+					return FR_NO_FILE;			/* Report EOT */
+#endif
+				}
+				dj->clust = clst;				/* Initialize data for new cluster */
+				dj->sect = clust2sect(dj->fs, clst);
+			}
+		}
+	}
+
+	dj->index = i;
+	dj->dir = dj->fs->win + (i % (SS(dj->fs) / SZ_DIR)) * SZ_DIR;
+
+	return FR_OK;
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Directory handling - Reserve directory entry                          */
+/*-----------------------------------------------------------------------*/
+
+#if !_FS_READONLY
+static
+FRESULT dir_alloc (
+	DIR* dj,	/* Pointer to the directory object */
+	UINT nent	/* Number of contiguous entries to allocate (1-21) */
+)
+{
+	FRESULT res;
+	UINT n;
+
+
+	res = dir_sdi(dj, 0);
+	if (res == FR_OK) {
+		n = 0;
+		do {
+			res = move_window(dj->fs, dj->sect);
+			if (res != FR_OK) break;
+			if (dj->dir[0] == DDE || dj->dir[0] == 0) {	/* Is it a blank entry? */
+				if (++n == nent) break;	/* A block of contiguous entry is found */
+			} else {
+				n = 0;					/* Not a blank entry. Restart to search */
+			}
+			res = dir_next(dj, 1);		/* Next entry with table stretch enabled */
+		} while (res == FR_OK);
+	}
+	return res;
+}
+#endif
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Directory handling - Load/Store start cluster number                  */
+/*-----------------------------------------------------------------------*/
+
+static
+DWORD ld_clust (
+	FATFS *fs,	/* Pointer to the fs object */
+	BYTE *dir	/* Pointer to the directory entry */
+)
+{
+	DWORD cl;
+
+	cl = LD_WORD(dir+DIR_FstClusLO);
+	if (fs->fs_type == FS_FAT32)
+		cl |= (DWORD)LD_WORD(dir+DIR_FstClusHI) << 16;
+
+	return cl;
+}
+
+
+#if !_FS_READONLY
+static
+void st_clust (
+	BYTE *dir,	/* Pointer to the directory entry */
+	DWORD cl	/* Value to be set */
+)
+{
+	ST_WORD(dir+DIR_FstClusLO, cl);
+	ST_WORD(dir+DIR_FstClusHI, cl >> 16);
+}
+#endif
+
+
+
+/*-----------------------------------------------------------------------*/
+/* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry   */
+/*-----------------------------------------------------------------------*/
+#if _USE_LFN
+static
+const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30};	/* Offset of LFN chars in the directory entry */
+
+
+static
+int cmp_lfn (			/* 1:Matched, 0:Not matched */
+	WCHAR *lfnbuf,		/* Pointer to the LFN to be compared */
+	BYTE *dir			/* Pointer to the directory entry containing a part of LFN */
+)
+{
+	UINT i, s;
+	WCHAR wc, uc;
+
+
+	i = ((dir[LDIR_Ord] & ~LLE) - 1) * 13;	/* Get offset in the LFN buffer */
+	s = 0; wc = 1;
+	do {
+		uc = LD_WORD(dir+LfnOfs[s]);	/* Pick an LFN character from the entry */
+		if (wc) {	/* Last char has not been processed */
+			wc = ff_wtoupper(uc);		/* Convert it to upper case */
+			if (i >= _MAX_LFN || wc != ff_wtoupper(lfnbuf[i++]))	/* Compare it */
+				return 0;				/* Not matched */
+		} else {
+			if (uc != 0xFFFF) return 0;	/* Check filler */
+		}
+	} while (++s < 13);				/* Repeat until all chars in the entry are checked */
+
+	if ((dir[LDIR_Ord] & LLE) && wc && lfnbuf[i])	/* Last segment matched but different length */
+		return 0;
+
+	return 1;						/* The part of LFN matched */
+}
+
+
+
+static
+int pick_lfn (			/* 1:Succeeded, 0:Buffer overflow */
+	WCHAR *lfnbuf,		/* Pointer to the Unicode-LFN buffer */
+	BYTE *dir			/* Pointer to the directory entry */
+)
+{
+	UINT i, s;
+	WCHAR wc, uc;
+
+
+	i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13;	/* Offset in the LFN buffer */
+
+	s = 0; wc = 1;
+	do {
+		uc = LD_WORD(dir+LfnOfs[s]);		/* Pick an LFN character from the entry */
+		if (wc) {	/* Last char has not been processed */
+			if (i >= _MAX_LFN) return 0;	/* Buffer overflow? */
+			lfnbuf[i++] = wc = uc;			/* Store it */
+		} else {
+			if (uc != 0xFFFF) return 0;		/* Check filler */
+		}
+	} while (++s < 13);						/* Read all character in the entry */
+
+	if (dir[LDIR_Ord] & LLE) {				/* Put terminator if it is the last LFN part */
+		if (i >= _MAX_LFN) return 0;		/* Buffer overflow? */
+		lfnbuf[i] = 0;
+	}
+
+	return 1;
+}
+
+
+#if !_FS_READONLY
+static
+void fit_lfn (
+	const WCHAR *lfnbuf,	/* Pointer to the LFN buffer */
+	BYTE *dir,				/* Pointer to the directory entry */
+	BYTE ord,				/* LFN order (1-20) */
+	BYTE sum				/* SFN sum */
+)
+{
+	UINT i, s;
+	WCHAR wc;
+
+
+	dir[LDIR_Chksum] = sum;			/* Set check sum */
+	dir[LDIR_Attr] = AM_LFN;		/* Set attribute. LFN entry */
+	dir[LDIR_Type] = 0;
+	ST_WORD(dir+LDIR_FstClusLO, 0);
+
+	i = (ord - 1) * 13;				/* Get offset in the LFN buffer */
+	s = wc = 0;
+	do {
+		if (wc != 0xFFFF) wc = lfnbuf[i++];	/* Get an effective char */
+		ST_WORD(dir+LfnOfs[s], wc);	/* Put it */
+		if (!wc) wc = 0xFFFF;		/* Padding chars following last char */
+	} while (++s < 13);
+	if (wc == 0xFFFF || !lfnbuf[i]) ord |= LLE;	/* Bottom LFN part is the start of LFN sequence */
+	dir[LDIR_Ord] = ord;			/* Set the LFN order */
+}
+
+#endif
+#endif
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Create numbered name                                                  */
+/*-----------------------------------------------------------------------*/
+#if _USE_LFN
+void gen_numname (
+	BYTE *dst,			/* Pointer to generated SFN */
+	const BYTE *src,	/* Pointer to source SFN to be modified */
+	const WCHAR *lfn,	/* Pointer to LFN */
+	WORD seq			/* Sequence number */
+)
+{
+	BYTE ns[8], c;
+	UINT i, j;
+
+
+	mem_cpy(dst, src, 11);
+
+	if (seq > 5) {	/* On many collisions, generate a hash number instead of sequential number */
+		do seq = (seq >> 1) + (seq << 15) + (WORD)*lfn++; while (*lfn);
+	}
+
+	/* itoa (hexdecimal) */
+	i = 7;
+	do {
+		c = (seq % 16) + '0';
+		if (c > '9') c += 7;
+		ns[i--] = c;
+		seq /= 16;
+	} while (seq);
+	ns[i] = '~';
+
+	/* Append the number */
+	for (j = 0; j < i && dst[j] != ' '; j++) {
+		if (IsDBCS1(dst[j])) {
+			if (j == i - 1) break;
+			j++;
+		}
+	}
+	do {
+		dst[j++] = (i < 8) ? ns[i++] : ' ';
+	} while (j < 8);
+}
+#endif
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Calculate sum of an SFN                                               */
+/*-----------------------------------------------------------------------*/
+#if _USE_LFN
+static
+BYTE sum_sfn (
+	const BYTE *dir		/* Ptr to directory entry */
+)
+{
+	BYTE sum = 0;
+	UINT n = 11;
+
+	do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n);
+	return sum;
+}
+#endif
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Directory handling - Find an object in the directory                  */
+/*-----------------------------------------------------------------------*/
+
+static
+FRESULT dir_find (
+	DIR *dj			/* Pointer to the directory object linked to the file name */
+)
+{
+	FRESULT res;
+	BYTE c, *dir;
+#if _USE_LFN
+	BYTE a, ord, sum;
+#endif
+
+	res = dir_sdi(dj, 0);			/* Rewind directory object */
+	if (res != FR_OK) return res;
+
+#if _USE_LFN
+	ord = sum = 0xFF;
+#endif
+	do {
+		res = move_window(dj->fs, dj->sect);
+		if (res != FR_OK) break;
+		dir = dj->dir;					/* Ptr to the directory entry of current index */
+		c = dir[DIR_Name];
+		if (c == 0) { res = FR_NO_FILE; break; }	/* Reached to end of table */
+#if _USE_LFN	/* LFN configuration */
+		a = dir[DIR_Attr] & AM_MASK;
+		if (c == DDE || ((a & AM_VOL) && a != AM_LFN)) {	/* An entry without valid data */
+			ord = 0xFF;
+		} else {
+			if (a == AM_LFN) {			/* An LFN entry is found */
+				if (dj->lfn) {
+					if (c & LLE) {		/* Is it start of LFN sequence? */
+						sum = dir[LDIR_Chksum];
+						c &= ~LLE; ord = c;	/* LFN start order */
+						dj->lfn_idx = dj->index;
+					}
+					/* Check validity of the LFN entry and compare it with given name */
+					ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF;
+				}
+			} else {					/* An SFN entry is found */
+				if (!ord && sum == sum_sfn(dir)) break;	/* LFN matched? */
+				ord = 0xFF; dj->lfn_idx = 0xFFFF;	/* Reset LFN sequence */
+				if (!(dj->fn[NS] & NS_LOSS) && !mem_cmp(dir, dj->fn, 11)) break;	/* SFN matched? */
+			}
+		}
+#else		/* Non LFN configuration */
+		if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dj->fn, 11)) /* Is it a valid entry? */
+			break;
+#endif
+		res = dir_next(dj, 0);		/* Next entry */
+	} while (res == FR_OK);
+
+	return res;
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Read an object from the directory                                     */
+/*-----------------------------------------------------------------------*/
+#if _FS_MINIMIZE <= 1 || _USE_LABEL || _FS_RPATH >= 2
+static
+FRESULT dir_read (
+	DIR *dj,		/* Pointer to the directory object */
+	int vol			/* Filtered by 0:file/dir or 1:volume label */
+)
+{
+	FRESULT res;
+	BYTE a, c, *dir;
+#if _USE_LFN
+	BYTE ord = 0xFF, sum = 0xFF;
+#endif
+
+	res = FR_NO_FILE;
+	while (dj->sect) {
+		res = move_window(dj->fs, dj->sect);
+		if (res != FR_OK) break;
+		dir = dj->dir;					/* Ptr to the directory entry of current index */
+		c = dir[DIR_Name];
+		if (c == 0) { res = FR_NO_FILE; break; }	/* Reached to end of table */
+		a = dir[DIR_Attr] & AM_MASK;
+#if _USE_LFN	/* LFN configuration */
+		if (c == DDE || (!_FS_RPATH && c == '.') || (a == AM_VOL) != vol) {	/* An entry without valid data */
+			ord = 0xFF;
+		} else {
+			if (a == AM_LFN) {			/* An LFN entry is found */
+				if (c & LLE) {			/* Is it start of LFN sequence? */
+					sum = dir[LDIR_Chksum];
+					c &= ~LLE; ord = c;
+					dj->lfn_idx = dj->index;
+				}
+				/* Check LFN validity and capture it */
+				ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF;
+			} else {					/* An SFN entry is found */
+				if (ord || sum != sum_sfn(dir))	/* Is there a valid LFN? */
+					dj->lfn_idx = 0xFFFF;		/* It has no LFN. */
+				break;
+			}
+		}
+#else		/* Non LFN configuration */
+		if (c != DDE && (_FS_RPATH || c != '.') && a != AM_LFN && (a == AM_VOL) == vol)	/* Is it a valid entry? */
+			break;
+#endif
+		res = dir_next(dj, 0);				/* Next entry */
+		if (res != FR_OK) break;
+	}
+
+	if (res != FR_OK) dj->sect = 0;
+
+	return res;
+}
+#endif	/* _FS_MINIMIZE <= 1 || _USE_LABEL || _FS_RPATH >= 2 */
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Register an object to the directory                                   */
+/*-----------------------------------------------------------------------*/
+#if !_FS_READONLY
+static
+FRESULT dir_register (	/* FR_OK:Successful, FR_DENIED:No free entry or too many SFN collision, FR_DISK_ERR:Disk error */
+	DIR *dj				/* Target directory with object name to be created */
+)
+{
+	FRESULT res;
+#if _USE_LFN	/* LFN configuration */
+	WORD n, ne;
+	BYTE sn[12], *fn, sum;
+	WCHAR *lfn;
+
+
+	fn = dj->fn; lfn = dj->lfn;
+	mem_cpy(sn, fn, 12);
+
+	if (_FS_RPATH && (sn[NS] & NS_DOT))		/* Cannot create dot entry */
+		return FR_INVALID_NAME;
+
+	if (sn[NS] & NS_LOSS) {			/* When LFN is out of 8.3 format, generate a numbered name */
+		fn[NS] = 0; dj->lfn = 0;			/* Find only SFN */
+		for (n = 1; n < 100; n++) {
+			gen_numname(fn, sn, lfn, n);	/* Generate a numbered name */
+			res = dir_find(dj);				/* Check if the name collides with existing SFN */
+			if (res != FR_OK) break;
+		}
+		if (n == 100) return FR_DENIED;		/* Abort if too many collisions */
+		if (res != FR_NO_FILE) return res;	/* Abort if the result is other than 'not collided' */
+		fn[NS] = sn[NS]; dj->lfn = lfn;
+	}
+
+	if (sn[NS] & NS_LFN) {			/* When LFN is to be created, allocate entries for an SFN + LFNs. */
+		for (n = 0; lfn[n]; n++) ;
+		ne = (n + 25) / 13;
+	} else {						/* Otherwise allocate an entry for an SFN  */
+		ne = 1;
+	}
+	res = dir_alloc(dj, ne);		/* Allocate entries */
+
+	if (res == FR_OK && --ne) {		/* Set LFN entry if needed */
+		res = dir_sdi(dj, (WORD)(dj->index - ne));
+		if (res == FR_OK) {
+			sum = sum_sfn(dj->fn);	/* Sum value of the SFN tied to the LFN */
+			do {					/* Store LFN entries in bottom first */
+				res = move_window(dj->fs, dj->sect);
+				if (res != FR_OK) break;
+				fit_lfn(dj->lfn, dj->dir, (BYTE)ne, sum);
+				dj->fs->wflag = 1;
+				res = dir_next(dj, 0);	/* Next entry */
+			} while (res == FR_OK && --ne);
+		}
+	}
+#else	/* Non LFN configuration */
+	res = dir_alloc(dj, 1);		/* Allocate an entry for SFN */
+#endif
+
+	if (res == FR_OK) {				/* Set SFN entry */
+		res = move_window(dj->fs, dj->sect);
+		if (res == FR_OK) {
+			mem_set(dj->dir, 0, SZ_DIR);	/* Clean the entry */
+			mem_cpy(dj->dir, dj->fn, 11);	/* Put SFN */
+#if _USE_LFN
+			dj->dir[DIR_NTres] = *(dj->fn+NS) & (NS_BODY | NS_EXT);	/* Put NT flag */
+#endif
+			dj->fs->wflag = 1;
+		}
+	}
+
+	return res;
+}
+#endif /* !_FS_READONLY */
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Remove an object from the directory                                   */
+/*-----------------------------------------------------------------------*/
+#if !_FS_READONLY && !_FS_MINIMIZE
+static
+FRESULT dir_remove (	/* FR_OK: Successful, FR_DISK_ERR: A disk error */
+	DIR *dj				/* Directory object pointing the entry to be removed */
+)
+{
+	FRESULT res;
+#if _USE_LFN	/* LFN configuration */
+	WORD i;
+
+	i = dj->index;	/* SFN index */
+	res = dir_sdi(dj, (WORD)((dj->lfn_idx == 0xFFFF) ? i : dj->lfn_idx));	/* Goto the SFN or top of the LFN entries */
+	if (res == FR_OK) {
+		do {
+			res = move_window(dj->fs, dj->sect);
+			if (res != FR_OK) break;
+			*dj->dir = DDE;			/* Mark the entry "deleted" */
+			dj->fs->wflag = 1;
+			if (dj->index >= i) break;	/* When reached SFN, all entries of the object has been deleted. */
+			res = dir_next(dj, 0);		/* Next entry */
+		} while (res == FR_OK);
+		if (res == FR_NO_FILE) res = FR_INT_ERR;
+	}
+
+#else			/* Non LFN configuration */
+	res = dir_sdi(dj, dj->index);
+	if (res == FR_OK) {
+		res = move_window(dj->fs, dj->sect);
+		if (res == FR_OK) {
+			*dj->dir = DDE;			/* Mark the entry "deleted" */
+			dj->fs->wflag = 1;
+		}
+	}
+#endif
+
+	return res;
+}
+#endif /* !_FS_READONLY */
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Pick a segment and create the object name in directory form           */
+/*-----------------------------------------------------------------------*/
+
+static
+FRESULT create_name (
+	DIR *dj,			/* Pointer to the directory object */
+	const TCHAR **path	/* Pointer to pointer to the segment in the path string */
+)
+{
+#if _USE_LFN	/* LFN configuration */
+	BYTE b, cf;
+	WCHAR w, *lfn;
+	UINT i, ni, si, di;
+	const TCHAR *p;
+
+	/* Create LFN in Unicode */
+	for (p = *path; *p == '/' || *p == '\\'; p++) ;	/* Strip duplicated separator */
+	lfn = dj->lfn;
+	si = di = 0;
+	for (;;) {
+		w = p[si++];					/* Get a character */
+		if (w < ' ' || w == '/' || w == '\\') break;	/* Break on end of segment */
+		if (di >= _MAX_LFN)				/* Reject too long name */
+			return FR_INVALID_NAME;
+#if !_LFN_UNICODE
+		w &= 0xFF;
+		if (IsDBCS1(w)) {				/* Check if it is a DBC 1st byte (always false on SBCS cfg) */
+			b = (BYTE)p[si++];			/* Get 2nd byte */
+			if (!IsDBCS2(b))
+				return FR_INVALID_NAME;	/* Reject invalid sequence */
+			w = (w << 8) + b;			/* Create a DBC */
+		}
+		w = ff_convert(w, 1);			/* Convert ANSI/OEM to Unicode */
+		if (!w) return FR_INVALID_NAME;	/* Reject invalid code */
+#endif
+		if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) /* Reject illegal chars for LFN */
+			return FR_INVALID_NAME;
+		lfn[di++] = w;					/* Store the Unicode char */
+	}
+	*path = &p[si];						/* Return pointer to the next segment */
+	cf = (w < ' ') ? NS_LAST : 0;		/* Set last segment flag if end of path */
+#if _FS_RPATH
+	if ((di == 1 && lfn[di-1] == '.') || /* Is this a dot entry? */
+		(di == 2 && lfn[di-1] == '.' && lfn[di-2] == '.')) {
+		lfn[di] = 0;
+		for (i = 0; i < 11; i++)
+			dj->fn[i] = (i < di) ? '.' : ' ';
+		dj->fn[i] = cf | NS_DOT;		/* This is a dot entry */
+		return FR_OK;
+	}
+#endif
+	while (di) {						/* Strip trailing spaces and dots */
+		w = lfn[di-1];
+		if (w != ' ' && w != '.') break;
+		di--;
+	}
+	if (!di) return FR_INVALID_NAME;	/* Reject nul string */
+
+	lfn[di] = 0;						/* LFN is created */
+
+	/* Create SFN in directory form */
+	mem_set(dj->fn, ' ', 11);
+	for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ;	/* Strip leading spaces and dots */
+	if (si) cf |= NS_LOSS | NS_LFN;
+	while (di && lfn[di - 1] != '.') di--;	/* Find extension (di<=si: no extension) */
+
+	b = i = 0; ni = 8;
+	for (;;) {
+		w = lfn[si++];					/* Get an LFN char */
+		if (!w) break;					/* Break on end of the LFN */
+		if (w == ' ' || (w == '.' && si != di)) {	/* Remove spaces and dots */
+			cf |= NS_LOSS | NS_LFN; continue;
+		}
+
+		if (i >= ni || si == di) {		/* Extension or end of SFN */
+			if (ni == 11) {				/* Long extension */
+				cf |= NS_LOSS | NS_LFN; break;
+			}
+			if (si != di) cf |= NS_LOSS | NS_LFN;	/* Out of 8.3 format */
+			if (si > di) break;			/* No extension */
+			si = di; i = 8; ni = 11;	/* Enter extension section */
+			b <<= 2; continue;
+		}
+
+		if (w >= 0x80) {				/* Non ASCII char */
+#ifdef _EXCVT
+			w = ff_convert(w, 0);		/* Unicode -> OEM code */
+			if (w) w = ExCvt[w - 0x80];	/* Convert extended char to upper (SBCS) */
+#else
+			w = ff_convert(ff_wtoupper(w), 0);	/* Upper converted Unicode -> OEM code */
+#endif
+			cf |= NS_LFN;				/* Force create LFN entry */
+		}
+
+		if (_DF1S && w >= 0x100) {		/* Double byte char (always false on SBCS cfg) */
+			if (i >= ni - 1) {
+				cf |= NS_LOSS | NS_LFN; i = ni; continue;
+			}
+			dj->fn[i++] = (BYTE)(w >> 8);
+		} else {						/* Single byte char */
+			if (!w || chk_chr("+,;=[]", w)) {	/* Replace illegal chars for SFN */
+				w = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */
+			} else {
+				if (IsUpper(w)) {		/* ASCII large capital */
+					b |= 2;
+				} else {
+					if (IsLower(w)) {	/* ASCII small capital */
+						b |= 1; w -= 0x20;
+					}
+				}
+			}
+		}
+		dj->fn[i++] = (BYTE)w;
+	}
+
+	if (dj->fn[0] == DDE) dj->fn[0] = NDDE;	/* If the first char collides with deleted mark, replace it with 0x05 */
+
+	if (ni == 8) b <<= 2;
+	if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03)	/* Create LFN entry when there are composite capitals */
+		cf |= NS_LFN;
+	if (!(cf & NS_LFN)) {						/* When LFN is in 8.3 format without extended char, NT flags are created */
+		if ((b & 0x03) == 0x01) cf |= NS_EXT;	/* NT flag (Extension has only small capital) */
+		if ((b & 0x0C) == 0x04) cf |= NS_BODY;	/* NT flag (Filename has only small capital) */
+	}
+
+	dj->fn[NS] = cf;	/* SFN is created */
+
+	return FR_OK;
+
+
+#else	/* Non-LFN configuration */
+	BYTE b, c, d, *sfn;
+	UINT ni, si, i;
+	const char *p;
+
+	/* Create file name in directory form */
+	for (p = *path; *p == '/' || *p == '\\'; p++) ;	/* Strip duplicated separator */
+	sfn = dj->fn;
+	mem_set(sfn, ' ', 11);
+	si = i = b = 0; ni = 8;
+#if _FS_RPATH
+	if (p[si] == '.') { /* Is this a dot entry? */
+		for (;;) {
+			c = (BYTE)p[si++];
+			if (c != '.' || si >= 3) break;
+			sfn[i++] = c;
+		}
+		if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME;
+		*path = &p[si];									/* Return pointer to the next segment */
+		sfn[NS] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT;	/* Set last segment flag if end of path */
+		return FR_OK;
+	}
+#endif
+	for (;;) {
+		c = (BYTE)p[si++];
+		if (c <= ' ' || c == '/' || c == '\\') break;	/* Break on end of segment */
+		if (c == '.' || i >= ni) {
+			if (ni != 8 || c != '.') return FR_INVALID_NAME;
+			i = 8; ni = 11;
+			b <<= 2; continue;
+		}
+		if (c >= 0x80) {				/* Extended char? */
+			b |= 3;						/* Eliminate NT flag */
+#ifdef _EXCVT
+			c = ExCvt[c - 0x80];		/* To upper extended chars (SBCS cfg) */
+#else
+#if !_DF1S
+			return FR_INVALID_NAME;		/* Reject extended chars (ASCII cfg) */
+#endif
+#endif
+		}
+		if (IsDBCS1(c)) {				/* Check if it is a DBC 1st byte (always false on SBCS cfg) */
+			d = (BYTE)p[si++];			/* Get 2nd byte */
+			if (!IsDBCS2(d) || i >= ni - 1)	/* Reject invalid DBC */
+				return FR_INVALID_NAME;
+			sfn[i++] = c;
+			sfn[i++] = d;
+		} else {						/* Single byte code */
+			if (chk_chr("\"*+,:;<=>\?[]|\x7F", c))	/* Reject illegal chrs for SFN */
+				return FR_INVALID_NAME;
+			if (IsUpper(c)) {			/* ASCII large capital? */
+				b |= 2;
+			} else {
+				if (IsLower(c)) {		/* ASCII small capital? */
+					b |= 1; c -= 0x20;
+				}
+			}
+			sfn[i++] = c;
+		}
+	}
+	*path = &p[si];						/* Return pointer to the next segment */
+	c = (c <= ' ') ? NS_LAST : 0;		/* Set last segment flag if end of path */
+
+	if (!i) return FR_INVALID_NAME;		/* Reject nul string */
+	if (sfn[0] == DDE) sfn[0] = NDDE;	/* When first char collides with DDE, replace it with 0x05 */
+
+	if (ni == 8) b <<= 2;
+	if ((b & 0x03) == 0x01) c |= NS_EXT;	/* NT flag (Name extension has only small capital) */
+	if ((b & 0x0C) == 0x04) c |= NS_BODY;	/* NT flag (Name body has only small capital) */
+
+	sfn[NS] = c;		/* Store NT flag, File name is created */
+
+	return FR_OK;
+#endif
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Get file information from directory entry                             */
+/*-----------------------------------------------------------------------*/
+#if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2
+static
+void get_fileinfo (		/* No return code */
+	DIR *dj,			/* Pointer to the directory object */
+	FILINFO *fno	 	/* Pointer to the file information to be filled */
+)
+{
+	UINT i;
+	BYTE nt, *dir;
+	TCHAR *p, c;
+
+
+	p = fno->fname;
+	if (dj->sect) {
+		dir = dj->dir;
+		nt = dir[DIR_NTres];		/* NT flag */
+		for (i = 0; i < 8; i++) {	/* Copy name body */
+			c = dir[i];
+			if (c == ' ') break;
+			if (c == NDDE) c = (TCHAR)DDE;
+			if (_USE_LFN && (nt & NS_BODY) && IsUpper(c)) c += 0x20;
+#if _LFN_UNICODE
+			if (IsDBCS1(c) && i < 7 && IsDBCS2(dir[i+1]))
+				c = (c << 8) | dir[++i];
+			c = ff_convert(c, 1);
+			if (!c) c = '?';
+#endif
+			*p++ = c;
+		}
+		if (dir[8] != ' ') {		/* Copy name extension */
+			*p++ = '.';
+			for (i = 8; i < 11; i++) {
+				c = dir[i];
+				if (c == ' ') break;
+				if (_USE_LFN && (nt & NS_EXT) && IsUpper(c)) c += 0x20;
+#if _LFN_UNICODE
+				if (IsDBCS1(c) && i < 10 && IsDBCS2(dir[i+1]))
+					c = (c << 8) | dir[++i];
+				c = ff_convert(c, 1);
+				if (!c) c = '?';
+#endif
+				*p++ = c;
+			}
+		}
+		fno->fattrib = dir[DIR_Attr];				/* Attribute */
+		fno->fsize = LD_DWORD(dir+DIR_FileSize);	/* Size */
+		fno->fdate = LD_WORD(dir+DIR_WrtDate);		/* Date */
+		fno->ftime = LD_WORD(dir+DIR_WrtTime);		/* Time */
+	}
+	*p = 0;		/* Terminate SFN str by a \0 */
+
+#if _USE_LFN
+	if (fno->lfname && fno->lfsize) {
+		TCHAR *tp = fno->lfname;
+		WCHAR w, *lfn;
+
+		i = 0;
+		if (dj->sect && dj->lfn_idx != 0xFFFF) {/* Get LFN if available */
+			lfn = dj->lfn;
+			while ((w = *lfn++) != 0) {			/* Get an LFN char */
+#if !_LFN_UNICODE
+				w = ff_convert(w, 0);			/* Unicode -> OEM conversion */
+				if (!w) { i = 0; break; }		/* Could not convert, no LFN */
+				if (_DF1S && w >= 0x100)		/* Put 1st byte if it is a DBC (always false on SBCS cfg) */
+					tp[i++] = (TCHAR)(w >> 8);
+#endif
+				if (i >= fno->lfsize - 1) { i = 0; break; }	/* Buffer overflow, no LFN */
+				tp[i++] = (TCHAR)w;
+			}
+		}
+		tp[i] = 0;	/* Terminate the LFN str by a \0 */
+	}
+#endif
+}
+#endif /* _FS_MINIMIZE <= 1 || _FS_RPATH >= 2*/
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Follow a file path                                                    */
+/*-----------------------------------------------------------------------*/
+
+static
+FRESULT follow_path (	/* FR_OK(0): successful, !=0: error code */
+	DIR *dj,			/* Directory object to return last directory and found object */
+	const TCHAR *path	/* Full-path string to find a file or directory */
+)
+{
+	FRESULT res;
+	BYTE *dir, ns;
+
+
+#if _FS_RPATH
+	if (*path == '/' || *path == '\\') { /* There is a heading separator */
+		path++;	dj->sclust = 0;		/* Strip it and start from the root dir */
+	} else {							/* No heading separator */
+		dj->sclust = dj->fs->cdir;	/* Start from the current dir */
+	}
+#else
+	if (*path == '/' || *path == '\\')	/* Strip heading separator if exist */
+		path++;
+	dj->sclust = 0;						/* Start from the root dir */
+#endif
+
+	if ((UINT)*path < ' ') {			/* Nul path means the start directory itself */
+		res = dir_sdi(dj, 0);
+		dj->dir = 0;
+	} else {							/* Follow path */
+		for (;;) {
+			res = create_name(dj, &path);	/* Get a segment */
+			if (res != FR_OK) break;
+			res = dir_find(dj);				/* Find it */
+			ns = *(dj->fn+NS);
+			if (res != FR_OK) {				/* Failed to find the object */
+				if (res != FR_NO_FILE) break;	/* Abort if any hard error occurred */
+				/* Object not found */
+				if (_FS_RPATH && (ns & NS_DOT)) {	/* If dot entry is not exit */
+					dj->sclust = 0; dj->dir = 0;	/* It is the root dir */
+					res = FR_OK;
+					if (!(ns & NS_LAST)) continue;
+				} else {							/* Could not find the object */
+					if (!(ns & NS_LAST)) res = FR_NO_PATH;
+				}
+				break;
+			}
+			if (ns & NS_LAST) break;			/* Last segment match. Function completed. */
+			dir = dj->dir;						/* There is next segment. Follow the sub directory */
+			if (!(dir[DIR_Attr] & AM_DIR)) {	/* Cannot follow because it is a file */
+				res = FR_NO_PATH; break;
+			}
+			dj->sclust = ld_clust(dj->fs, dir);
+		}
+	}
+
+	return res;
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Load a sector and check if it is an FAT Volume Boot Record            */
+/*-----------------------------------------------------------------------*/
+
+static
+BYTE check_fs (	/* 0:FAT-VBR, 1:Any BR but not FAT, 2:Not a BR, 3:Disk error */
+	FATFS *fs,	/* File system object */
+	DWORD sect	/* Sector# (lba) to check if it is an FAT boot record or not */
+)
+{
+	if (disk_read(fs->drv, fs->win, sect, 1) != RES_OK)	/* Load boot record */
+		return 3;
+	if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55)		/* Check record signature (always placed at offset 510 even if the sector size is >512) */
+		return 2;
+
+	if ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146)	/* Check "FAT" string */
+		return 0;
+	if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146)
+		return 0;
+
+	return 1;
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Check if the file system object is valid or not                       */
+/*-----------------------------------------------------------------------*/
+
+static
+FRESULT chk_mounted (	/* FR_OK(0): successful, !=0: any error occurred */
+	const TCHAR **path,	/* Pointer to pointer to the path name (drive number) */
+	FATFS **rfs,		/* Pointer to pointer to the found file system object */
+	BYTE wmode			/* !=0: Check write protection for write access */
+)
+{
+	BYTE fmt, b, pi, *tbl;
+	UINT vol;
+	DSTATUS stat;
+	DWORD bsect, fasize, tsect, sysect, nclst, szbfat;
+	WORD nrsv;
+	const TCHAR *p = *path;
+	FATFS *fs;
+
+
+	/* Get logical drive number from the path name */
+	vol = p[0] - '0';					/* Is there a drive number? */
+	if (vol <= 9 && p[1] == ':') {		/* Found a drive number, get and strip it */
+		p += 2; *path = p;				/* Return pointer to the path name */
+	} else {							/* No drive number, use default drive */
+#if _FS_RPATH
+		vol = CurrVol;					/* Use current drive */
+#else
+		vol = 0;						/* Use drive 0 */
+#endif
+	}
+
+	/* Check if the file system object is valid or not */
+	*rfs = 0;
+	if (vol >= _VOLUMES) 				/* Is the drive number valid? */
+		return FR_INVALID_DRIVE;
+	fs = FatFs[vol];					/* Get corresponding file system object */
+	if (!fs) return FR_NOT_ENABLED;		/* Is the file system object available? */
+
+	ENTER_FF(fs);						/* Lock volume */
+
+	*rfs = fs;							/* Return pointer to the corresponding file system object */
+	if (fs->fs_type) {					/* If the volume has been mounted */
+		stat = disk_status(fs->drv);
+		if (!(stat & STA_NOINIT)) {		/* and the physical drive is kept initialized (has not been changed), */
+			if (!_FS_READONLY && wmode && (stat & STA_PROTECT))	/* Check write protection if needed */
+				return FR_WRITE_PROTECTED;
+			return FR_OK;				/* The file system object is valid */
+		}
+	}
+
+	/* The file system object is not valid. */
+	/* Following code attempts to mount the volume. (analyze BPB and initialize the fs object) */
+
+	fs->fs_type = 0;					/* Clear the file system object */
+	fs->drv = LD2PD(vol);				/* Bind the logical drive and a physical drive */
+	stat = disk_initialize(fs->drv);	/* Initialize the physical drive */
+	if (stat & STA_NOINIT)				/* Check if the initialization succeeded */
+		return FR_NOT_READY;			/* Failed to initialize due to no medium or hard error */
+	if (!_FS_READONLY && wmode && (stat & STA_PROTECT))	/* Check disk write protection if needed */
+		return FR_WRITE_PROTECTED;
+#if _MAX_SS != 512						/* Get disk sector size (variable sector size cfg only) */
+	if (disk_ioctl(fs->drv, GET_SECTOR_SIZE, &fs->ssize) != RES_OK)
+		return FR_DISK_ERR;
+#endif
+	/* Search FAT partition on the drive. Supports only generic partitions, FDISK and SFD. */
+	fmt = check_fs(fs, bsect = 0);		/* Load sector 0 and check if it is an FAT-VBR (in SFD) */
+	if (LD2PT(vol) && !fmt) fmt = 1;	/* Force non-SFD if the volume is forced partition */
+	if (fmt == 1) {						/* Not an FAT-VBR, the physical drive can be partitioned */
+		/* Check the partition listed in the partition table */
+		pi = LD2PT(vol);
+		if (pi) pi--;
+		tbl = &fs->win[MBR_Table + pi * SZ_PTE];/* Partition table */
+		if (tbl[4]) {						/* Is the partition existing? */
+			bsect = LD_DWORD(&tbl[8]);		/* Partition offset in LBA */
+			fmt = check_fs(fs, bsect);		/* Check the partition */
+		}
+	}
+	if (fmt == 3) return FR_DISK_ERR;
+	if (fmt) return FR_NO_FILESYSTEM;		/* No FAT volume is found */
+
+	/* An FAT volume is found. Following code initializes the file system object */
+
+	if (LD_WORD(fs->win+BPB_BytsPerSec) != SS(fs))		/* (BPB_BytsPerSec must be equal to the physical sector size) */
+		return FR_NO_FILESYSTEM;
+
+	fasize = LD_WORD(fs->win+BPB_FATSz16);				/* Number of sectors per FAT */
+	if (!fasize) fasize = LD_DWORD(fs->win+BPB_FATSz32);
+	fs->fsize = fasize;
+
+	fs->n_fats = b = fs->win[BPB_NumFATs];				/* Number of FAT copies */
+	if (b != 1 && b != 2) return FR_NO_FILESYSTEM;		/* (Must be 1 or 2) */
+	fasize *= b;										/* Number of sectors for FAT area */
+
+	fs->csize = b = fs->win[BPB_SecPerClus];			/* Number of sectors per cluster */
+	if (!b || (b & (b - 1))) return FR_NO_FILESYSTEM;	/* (Must be power of 2) */
+
+	fs->n_rootdir = LD_WORD(fs->win+BPB_RootEntCnt);	/* Number of root directory entries */
+	if (fs->n_rootdir % (SS(fs) / SZ_DIR)) return FR_NO_FILESYSTEM;	/* (BPB_RootEntCnt must be sector aligned) */
+
+	tsect = LD_WORD(fs->win+BPB_TotSec16);				/* Number of sectors on the volume */
+	if (!tsect) tsect = LD_DWORD(fs->win+BPB_TotSec32);
+
+	nrsv = LD_WORD(fs->win+BPB_RsvdSecCnt);				/* Number of reserved sectors */
+	if (!nrsv) return FR_NO_FILESYSTEM;					/* (BPB_RsvdSecCnt must not be 0) */
+
+	/* Determine the FAT sub type */
+	sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZ_DIR);	/* RSV+FAT+DIR */
+	if (tsect < sysect) return FR_NO_FILESYSTEM;		/* (Invalid volume size) */
+	nclst = (tsect - sysect) / fs->csize;				/* Number of clusters */
+	if (!nclst) return FR_NO_FILESYSTEM;				/* (Invalid volume size) */
+	fmt = FS_FAT12;
+	if (nclst >= MIN_FAT16) fmt = FS_FAT16;
+	if (nclst >= MIN_FAT32) fmt = FS_FAT32;
+
+	/* Boundaries and Limits */
+	fs->n_fatent = nclst + 2;							/* Number of FAT entries */
+	fs->volbase = bsect;								/* Volume start sector */
+	fs->fatbase = bsect + nrsv; 						/* FAT start sector */
+	fs->database = bsect + sysect;						/* Data start sector */
+	if (fmt == FS_FAT32) {
+		if (fs->n_rootdir) return FR_NO_FILESYSTEM;		/* (BPB_RootEntCnt must be 0) */
+		fs->dirbase = LD_DWORD(fs->win+BPB_RootClus);	/* Root directory start cluster */
+		szbfat = fs->n_fatent * 4;						/* (Required FAT size) */
+	} else {
+		if (!fs->n_rootdir)	return FR_NO_FILESYSTEM;	/* (BPB_RootEntCnt must not be 0) */
+		fs->dirbase = fs->fatbase + fasize;				/* Root directory start sector */
+		szbfat = (fmt == FS_FAT16) ?					/* (Required FAT size) */
+			fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1);
+	}
+	if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs))	/* (BPB_FATSz must not be less than required) */
+		return FR_NO_FILESYSTEM;
+
+#if !_FS_READONLY
+	/* Initialize cluster allocation information */
+	fs->free_clust = 0xFFFFFFFF;
+	fs->last_clust = 0;
+
+	/* Get fsinfo if available */
+	if (fmt == FS_FAT32) {
+	 	fs->fsi_flag = 0;
+		fs->fsi_sector = bsect + LD_WORD(fs->win+BPB_FSInfo);
+		if (disk_read(fs->drv, fs->win, fs->fsi_sector, 1) == RES_OK &&
+			LD_WORD(fs->win+BS_55AA) == 0xAA55 &&
+			LD_DWORD(fs->win+FSI_LeadSig) == 0x41615252 &&
+			LD_DWORD(fs->win+FSI_StrucSig) == 0x61417272) {
+				fs->last_clust = LD_DWORD(fs->win+FSI_Nxt_Free);
+				fs->free_clust = LD_DWORD(fs->win+FSI_Free_Count);
+		}
+	}
+#endif
+	fs->fs_type = fmt;		/* FAT sub-type */
+	fs->id = ++Fsid;		/* File system mount ID */
+	fs->winsect = 0;		/* Invalidate sector cache */
+	fs->wflag = 0;
+#if _FS_RPATH
+	fs->cdir = 0;			/* Current directory (root dir) */
+#endif
+#if _FS_LOCK				/* Clear file lock semaphores */
+	clear_lock(fs);
+#endif
+
+	return FR_OK;
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Check if the file/dir object is valid or not                          */
+/*-----------------------------------------------------------------------*/
+
+static
+FRESULT validate (	/* FR_OK(0): The object is valid, !=0: Invalid */
+	void* obj		/* Pointer to the object FIL/DIR to check validity */
+)
+{
+	FIL *fil = (FIL*)obj;	/* Assuming offset of fs and id in the FIL/DIR is identical */
+
+
+	if (!fil || !fil->fs || !fil->fs->fs_type || fil->fs->id != fil->id)
+		return FR_INVALID_OBJECT;
+
+	ENTER_FF(fil->fs);		/* Lock file system */
+
+	if (disk_status(fil->fs->drv) & STA_NOINIT)
+		return FR_NOT_READY;
+
+	return FR_OK;
+}
+
+
+
+
+/*--------------------------------------------------------------------------
+
+   Public Functions
+
+--------------------------------------------------------------------------*/
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Mount/Unmount a Logical Drive                                         */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_mount (
+	BYTE vol,		/* Logical drive number to be mounted/unmounted */
+	FATFS *fs		/* Pointer to new file system object (NULL for unmount)*/
+)
+{
+	FATFS *rfs;
+
+
+	if (vol >= _VOLUMES)		/* Check if the drive number is valid */
+		return FR_INVALID_DRIVE;
+	rfs = FatFs[vol];			/* Get current fs object */
+
+	if (rfs) {
+#if _FS_LOCK
+		clear_lock(rfs);
+#endif
+#if _FS_REENTRANT				/* Discard sync object of the current volume */
+		if (!ff_del_syncobj(rfs->sobj)) return FR_INT_ERR;
+#endif
+		rfs->fs_type = 0;		/* Clear old fs object */
+	}
+
+	if (fs) {
+		fs->fs_type = 0;		/* Clear new fs object */
+#if _FS_REENTRANT				/* Create sync object for the new volume */
+		if (!ff_cre_syncobj(vol, &fs->sobj)) return FR_INT_ERR;
+#endif
+	}
+	FatFs[vol] = fs;			/* Register new fs object */
+
+	return FR_OK;
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Open or Create a File                                                 */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_open (
+	FIL *fp,			/* Pointer to the blank file object */
+	const TCHAR *path,	/* Pointer to the file name */
+	BYTE mode			/* Access mode and file open mode flags */
+)
+{
+	FRESULT res;
+	DIR dj;
+	BYTE *dir;
+	DEF_NAMEBUF;
+
+
+	if (!fp) return FR_INVALID_OBJECT;
+	fp->fs = 0;			/* Clear file object */
+
+#if !_FS_READONLY
+	mode &= FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW;
+	res = chk_mounted(&path, &dj.fs, (BYTE)(mode & ~FA_READ));
+#else
+	mode &= FA_READ;
+	res = chk_mounted(&path, &dj.fs, 0);
+#endif
+	if (res == FR_OK) {
+		INIT_BUF(dj);
+		res = follow_path(&dj, path);	/* Follow the file path */
+		dir = dj.dir;
+#if !_FS_READONLY	/* R/W configuration */
+		if (res == FR_OK) {
+			if (!dir)	/* Current dir itself */
+				res = FR_INVALID_NAME;
+#if _FS_LOCK
+			else
+				res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
+#endif
+		}
+		/* Create or Open a file */
+		if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) {
+			DWORD dw, cl;
+
+			if (res != FR_OK) {					/* No file, create new */
+				if (res == FR_NO_FILE)			/* There is no file to open, create a new entry */
+#if _FS_LOCK
+					res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES;
+#else
+					res = dir_register(&dj);
+#endif
+				mode |= FA_CREATE_ALWAYS;		/* File is created */
+				dir = dj.dir;					/* New entry */
+			}
+			else {								/* Any object is already existing */
+				if (dir[DIR_Attr] & (AM_RDO | AM_DIR)) {	/* Cannot overwrite it (R/O or DIR) */
+					res = FR_DENIED;
+				} else {
+					if (mode & FA_CREATE_NEW)	/* Cannot create as new file */
+						res = FR_EXIST;
+				}
+			}
+			if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) {	/* Truncate it if overwrite mode */
+				dw = get_fattime();					/* Created time */
+				ST_DWORD(dir+DIR_CrtTime, dw);
+				dir[DIR_Attr] = 0;					/* Reset attribute */
+				ST_DWORD(dir+DIR_FileSize, 0);		/* size = 0 */
+				cl = ld_clust(dj.fs, dir);			/* Get start cluster */
+				st_clust(dir, 0);					/* cluster = 0 */
+				dj.fs->wflag = 1;
+				if (cl) {							/* Remove the cluster chain if exist */
+					dw = dj.fs->winsect;
+					res = remove_chain(dj.fs, cl);
+					if (res == FR_OK) {
+						dj.fs->last_clust = cl - 1;	/* Reuse the cluster hole */
+						res = move_window(dj.fs, dw);
+					}
+				}
+			}
+		}
+		else {	/* Open an existing file */
+			if (res == FR_OK) {						/* Follow succeeded */
+				if (dir[DIR_Attr] & AM_DIR) {		/* It is a directory */
+					res = FR_NO_FILE;
+				} else {
+					if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */
+						res = FR_DENIED;
+				}
+			}
+		}
+		if (res == FR_OK) {
+			if (mode & FA_CREATE_ALWAYS)			/* Set file change flag if created or overwritten */
+				mode |= FA__WRITTEN;
+			fp->dir_sect = dj.fs->winsect;			/* Pointer to the directory entry */
+			fp->dir_ptr = dir;
+#if _FS_LOCK
+			fp->lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
+			if (!fp->lockid) res = FR_INT_ERR;
+#endif
+		}
+
+#else				/* R/O configuration */
+		if (res == FR_OK) {					/* Follow succeeded */
+			dir = dj.dir;
+			if (!dir) {						/* Current dir itself */
+				res = FR_INVALID_NAME;
+			} else {
+				if (dir[DIR_Attr] & AM_DIR)	/* It is a directory */
+					res = FR_NO_FILE;
+			}
+		}
+#endif
+		FREE_BUF();
+
+		if (res == FR_OK) {
+			fp->flag = mode;					/* File access mode */
+			fp->sclust = ld_clust(dj.fs, dir);	/* File start cluster */
+			fp->fsize = LD_DWORD(dir+DIR_FileSize);	/* File size */
+			fp->fptr = 0;						/* File pointer */
+			fp->dsect = 0;
+#if _USE_FASTSEEK
+			fp->cltbl = 0;						/* Normal seek mode */
+#endif
+			fp->fs = dj.fs; fp->id = dj.fs->id;	/* Validate file object */
+		}
+	}
+
+	LEAVE_FF(dj.fs, res);
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Read File                                                             */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_read (
+	FIL *fp, 		/* Pointer to the file object */
+	void *buff,		/* Pointer to data buffer */
+	UINT btr,		/* Number of bytes to read */
+	UINT *br		/* Pointer to number of bytes read */
+)
+{
+	FRESULT res;
+	DWORD clst, sect, remain;
+	UINT rcnt, cc;
+	BYTE csect, *rbuff = (BYTE*)buff;
+
+
+	*br = 0;	/* Clear read byte counter */
+
+	res = validate(fp);							/* Check validity */
+	if (res != FR_OK) LEAVE_FF(fp->fs, res);
+	if (fp->flag & FA__ERROR)					/* Aborted file? */
+		LEAVE_FF(fp->fs, FR_INT_ERR);
+	if (!(fp->flag & FA_READ)) 					/* Check access mode */
+		LEAVE_FF(fp->fs, FR_DENIED);
+	remain = fp->fsize - fp->fptr;
+	if (btr > remain) btr = (UINT)remain;		/* Truncate btr by remaining bytes */
+
+	for ( ;  btr;								/* Repeat until all data read */
+		rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) {
+		if ((fp->fptr % SS(fp->fs)) == 0) {		/* On the sector boundary? */
+			csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1));	/* Sector offset in the cluster */
+			if (!csect) {						/* On the cluster boundary? */
+				if (fp->fptr == 0) {			/* On the top of the file? */
+					clst = fp->sclust;			/* Follow from the origin */
+				} else {						/* Middle or end of the file */
+#if _USE_FASTSEEK
+					if (fp->cltbl)
+						clst = clmt_clust(fp, fp->fptr);	/* Get cluster# from the CLMT */
+					else
+#endif
+						clst = get_fat(fp->fs, fp->clust);	/* Follow cluster chain on the FAT */
+				}
+				if (clst < 2) ABORT(fp->fs, FR_INT_ERR);
+				if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
+				fp->clust = clst;				/* Update current cluster */
+			}
+			sect = clust2sect(fp->fs, fp->clust);	/* Get current sector */
+			if (!sect) ABORT(fp->fs, FR_INT_ERR);
+			sect += csect;
+			cc = btr / SS(fp->fs);				/* When remaining bytes >= sector size, */
+			if (cc) {							/* Read maximum contiguous sectors directly */
+				if (csect + cc > fp->fs->csize)	/* Clip at cluster boundary */
+					cc = fp->fs->csize - csect;
+				if (disk_read(fp->fs->drv, rbuff, sect, (BYTE)cc) != RES_OK)
+					ABORT(fp->fs, FR_DISK_ERR);
+#if !_FS_READONLY && _FS_MINIMIZE <= 2			/* Replace one of the read sectors with cached data if it contains a dirty sector */
+#if _FS_TINY
+				if (fp->fs->wflag && fp->fs->winsect - sect < cc)
+					mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs));
+#else
+				if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc)
+					mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs));
+#endif
+#endif
+				rcnt = SS(fp->fs) * cc;			/* Number of bytes transferred */
+				continue;
+			}
+#if !_FS_TINY
+			if (fp->dsect != sect) {			/* Load data sector if not in cache */
+#if !_FS_READONLY
+				if (fp->flag & FA__DIRTY) {		/* Write-back dirty sector cache */
+					if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
+						ABORT(fp->fs, FR_DISK_ERR);
+					fp->flag &= ~FA__DIRTY;
+				}
+#endif
+				if (disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK)	/* Fill sector cache */
+					ABORT(fp->fs, FR_DISK_ERR);
+			}
+#endif
+			fp->dsect = sect;
+		}
+		rcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs));	/* Get partial sector data from sector buffer */
+		if (rcnt > btr) rcnt = btr;
+#if _FS_TINY
+		if (move_window(fp->fs, fp->dsect))		/* Move sector window */
+			ABORT(fp->fs, FR_DISK_ERR);
+		mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt);	/* Pick partial sector */
+#else
+		mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt);	/* Pick partial sector */
+#endif
+	}
+
+	LEAVE_FF(fp->fs, FR_OK);
+}
+
+
+
+
+#if !_FS_READONLY
+/*-----------------------------------------------------------------------*/
+/* Write File                                                            */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_write (
+	FIL *fp,			/* Pointer to the file object */
+	const void *buff,	/* Pointer to the data to be written */
+	UINT btw,			/* Number of bytes to write */
+	UINT *bw			/* Pointer to number of bytes written */
+)
+{
+	FRESULT res;
+	DWORD clst, sect;
+	UINT wcnt, cc;
+	const BYTE *wbuff = (const BYTE*)buff;
+	BYTE csect;
+
+
+	*bw = 0;	/* Clear write byte counter */
+
+	res = validate(fp);						/* Check validity */
+	if (res != FR_OK) LEAVE_FF(fp->fs, res);
+	if (fp->flag & FA__ERROR)				/* Aborted file? */
+		LEAVE_FF(fp->fs, FR_INT_ERR);
+	if (!(fp->flag & FA_WRITE))				/* Check access mode */
+		LEAVE_FF(fp->fs, FR_DENIED);
+	if ((DWORD)(fp->fsize + btw) < fp->fsize) btw = 0;	/* File size cannot reach 4GB */
+
+	for ( ;  btw;							/* Repeat until all data written */
+		wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) {
+		if ((fp->fptr % SS(fp->fs)) == 0) {	/* On the sector boundary? */
+			csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1));	/* Sector offset in the cluster */
+			if (!csect) {					/* On the cluster boundary? */
+				if (fp->fptr == 0) {		/* On the top of the file? */
+					clst = fp->sclust;		/* Follow from the origin */
+					if (clst == 0)			/* When no cluster is allocated, */
+						fp->sclust = clst = create_chain(fp->fs, 0);	/* Create a new cluster chain */
+				} else {					/* Middle or end of the file */
+#if _USE_FASTSEEK
+					if (fp->cltbl)
+						clst = clmt_clust(fp, fp->fptr);	/* Get cluster# from the CLMT */
+					else
+#endif
+						clst = create_chain(fp->fs, fp->clust);	/* Follow or stretch cluster chain on the FAT */
+				}
+				if (clst == 0) break;		/* Could not allocate a new cluster (disk full) */
+				if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
+				if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
+				fp->clust = clst;			/* Update current cluster */
+			}
+#if _FS_TINY
+			if (fp->fs->winsect == fp->dsect && sync_window(fp->fs))	/* Write-back sector cache */
+				ABORT(fp->fs, FR_DISK_ERR);
+#else
+			if (fp->flag & FA__DIRTY) {		/* Write-back sector cache */
+				if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
+					ABORT(fp->fs, FR_DISK_ERR);
+				fp->flag &= ~FA__DIRTY;
+			}
+#endif
+			sect = clust2sect(fp->fs, fp->clust);	/* Get current sector */
+			if (!sect) ABORT(fp->fs, FR_INT_ERR);
+			sect += csect;
+			cc = btw / SS(fp->fs);			/* When remaining bytes >= sector size, */
+			if (cc) {						/* Write maximum contiguous sectors directly */
+				if (csect + cc > fp->fs->csize)	/* Clip at cluster boundary */
+					cc = fp->fs->csize - csect;
+				if (disk_write(fp->fs->drv, wbuff, sect, (BYTE)cc) != RES_OK)
+					ABORT(fp->fs, FR_DISK_ERR);
+#if _FS_TINY
+				if (fp->fs->winsect - sect < cc) {	/* Refill sector cache if it gets invalidated by the direct write */
+					mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs));
+					fp->fs->wflag = 0;
+				}
+#else
+				if (fp->dsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
+					mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs));
+					fp->flag &= ~FA__DIRTY;
+				}
+#endif
+				wcnt = SS(fp->fs) * cc;		/* Number of bytes transferred */
+				continue;
+			}
+#if _FS_TINY
+			if (fp->fptr >= fp->fsize) {	/* Avoid silly cache filling at growing edge */
+				if (sync_window(fp->fs)) ABORT(fp->fs, FR_DISK_ERR);
+				fp->fs->winsect = sect;
+			}
+#else
+			if (fp->dsect != sect) {		/* Fill sector cache with file data */
+				if (fp->fptr < fp->fsize &&
+					disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK)
+						ABORT(fp->fs, FR_DISK_ERR);
+			}
+#endif
+			fp->dsect = sect;
+		}
+		wcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs));/* Put partial sector into file I/O buffer */
+		if (wcnt > btw) wcnt = btw;
+#if _FS_TINY
+		if (move_window(fp->fs, fp->dsect))	/* Move sector window */
+			ABORT(fp->fs, FR_DISK_ERR);
+		mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt);	/* Fit partial sector */
+		fp->fs->wflag = 1;
+#else
+		mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt);	/* Fit partial sector */
+		fp->flag |= FA__DIRTY;
+#endif
+	}
+
+	if (fp->fptr > fp->fsize) fp->fsize = fp->fptr;	/* Update file size if needed */
+	fp->flag |= FA__WRITTEN;						/* Set file change flag */
+
+	LEAVE_FF(fp->fs, FR_OK);
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Synchronize the File Object                                           */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_sync (
+	FIL *fp		/* Pointer to the file object */
+)
+{
+	FRESULT res;
+	DWORD tm;
+	BYTE *dir;
+
+
+	res = validate(fp);					/* Check validity of the object */
+	if (res == FR_OK) {
+		if (fp->flag & FA__WRITTEN) {	/* Has the file been written? */
+#if !_FS_TINY	/* Write-back dirty buffer */
+			if (fp->flag & FA__DIRTY) {
+				if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
+					LEAVE_FF(fp->fs, FR_DISK_ERR);
+				fp->flag &= ~FA__DIRTY;
+			}
+#endif
+			/* Update the directory entry */
+			res = move_window(fp->fs, fp->dir_sect);
+			if (res == FR_OK) {
+				dir = fp->dir_ptr;
+				dir[DIR_Attr] |= AM_ARC;					/* Set archive bit */
+				ST_DWORD(dir+DIR_FileSize, fp->fsize);		/* Update file size */
+				st_clust(dir, fp->sclust);					/* Update start cluster */
+				tm = get_fattime();							/* Update updated time */
+				ST_DWORD(dir+DIR_WrtTime, tm);
+				ST_WORD(dir+DIR_LstAccDate, 0);
+				fp->flag &= ~FA__WRITTEN;
+				fp->fs->wflag = 1;
+				res = sync_fs(fp->fs);
+			}
+		}
+	}
+
+	LEAVE_FF(fp->fs, res);
+}
+
+#endif /* !_FS_READONLY */
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Close File                                                            */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_close (
+	FIL *fp		/* Pointer to the file object to be closed */
+)
+{
+	FRESULT res;
+
+
+#if _FS_READONLY
+	res = validate(fp);
+	{
+#if _FS_REENTRANT
+		FATFS *fs = fp->fs;
+#endif
+		if (res == FR_OK) fp->fs = 0;	/* Discard file object */
+		LEAVE_FF(fs, res);
+	}
+#else
+	res = f_sync(fp);		/* Flush cached data */
+#if _FS_LOCK
+	if (res == FR_OK) {		/* Decrement open counter */
+#if _FS_REENTRANT
+		FATFS *fs = fp->fs;;
+		res = validate(fp);
+		if (res == FR_OK) {
+			res = dec_lock(fp->lockid);	
+			unlock_fs(fs, FR_OK);
+		}
+#else
+		res = dec_lock(fp->lockid);
+#endif
+	}
+#endif
+	if (res == FR_OK) fp->fs = 0;	/* Discard file object */
+	return res;
+#endif
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Current Drive/Directory Handlings                                     */
+/*-----------------------------------------------------------------------*/
+
+#if _FS_RPATH >= 1
+
+FRESULT f_chdrive (
+	BYTE drv		/* Drive number */
+)
+{
+	if (drv >= _VOLUMES) return FR_INVALID_DRIVE;
+
+	CurrVol = drv;
+
+	return FR_OK;
+}
+
+
+
+FRESULT f_chdir (
+	const TCHAR *path	/* Pointer to the directory path */
+)
+{
+	FRESULT res;
+	DIR dj;
+	DEF_NAMEBUF;
+
+
+	res = chk_mounted(&path, &dj.fs, 0);
+	if (res == FR_OK) {
+		INIT_BUF(dj);
+		res = follow_path(&dj, path);		/* Follow the path */
+		FREE_BUF();
+		if (res == FR_OK) {					/* Follow completed */
+			if (!dj.dir) {
+				dj.fs->cdir = dj.sclust;	/* Start directory itself */
+			} else {
+				if (dj.dir[DIR_Attr] & AM_DIR)	/* Reached to the directory */
+					dj.fs->cdir = ld_clust(dj.fs, dj.dir);
+				else
+					res = FR_NO_PATH;		/* Reached but a file */
+			}
+		}
+		if (res == FR_NO_FILE) res = FR_NO_PATH;
+	}
+
+	LEAVE_FF(dj.fs, res);
+}
+
+
+#if _FS_RPATH >= 2
+FRESULT f_getcwd (
+	TCHAR *buff,	/* Pointer to the directory path */
+	UINT len		/* Size of path */
+)
+{
+	FRESULT res;
+	DIR dj;
+	UINT i, n;
+	DWORD ccl;
+	TCHAR *tp;
+	FILINFO fno;
+	DEF_NAMEBUF;
+
+
+	*buff = 0;
+	res = chk_mounted((const TCHAR**)&buff, &dj.fs, 0);	/* Get current volume */
+	if (res == FR_OK) {
+		INIT_BUF(dj);
+		i = len;			/* Bottom of buffer (dir stack base) */
+		dj.sclust = dj.fs->cdir;			/* Start to follow upper dir from current dir */
+		while ((ccl = dj.sclust) != 0) {	/* Repeat while current dir is a sub-dir */
+			res = dir_sdi(&dj, 1);			/* Get parent dir */
+			if (res != FR_OK) break;
+			res = dir_read(&dj, 0);
+			if (res != FR_OK) break;
+			dj.sclust = ld_clust(dj.fs, dj.dir);	/* Goto parent dir */
+			res = dir_sdi(&dj, 0);
+			if (res != FR_OK) break;
+			do {							/* Find the entry links to the child dir */
+				res = dir_read(&dj, 0);
+				if (res != FR_OK) break;
+				if (ccl == ld_clust(dj.fs, dj.dir)) break;	/* Found the entry */
+				res = dir_next(&dj, 0);	
+			} while (res == FR_OK);
+			if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */
+			if (res != FR_OK) break;
+#if _USE_LFN
+			fno.lfname = buff;
+			fno.lfsize = i;
+#endif
+			get_fileinfo(&dj, &fno);		/* Get the dir name and push it to the buffer */
+			tp = fno.fname;
+			if (_USE_LFN && *buff) tp = buff;
+			for (n = 0; tp[n]; n++) ;
+			if (i < n + 3) {
+				res = FR_NOT_ENOUGH_CORE; break;
+			}
+			while (n) buff[--i] = tp[--n];
+			buff[--i] = '/';
+		}
+		tp = buff;
+		if (res == FR_OK) {
+			*tp++ = '0' + CurrVol;			/* Put drive number */
+			*tp++ = ':';
+			if (i == len) {					/* Root-dir */
+				*tp++ = '/';
+			} else {						/* Sub-dir */
+				do		/* Add stacked path str */
+					*tp++ = buff[i++];
+				while (i < len);
+			}
+		}
+		*tp = 0;
+		FREE_BUF();
+	}
+
+	LEAVE_FF(dj.fs, res);
+}
+#endif /* _FS_RPATH >= 2 */
+#endif /* _FS_RPATH >= 1 */
+
+
+
+#if _FS_MINIMIZE <= 2
+/*-----------------------------------------------------------------------*/
+/* Seek File R/W Pointer                                                 */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_lseek (
+	FIL *fp,		/* Pointer to the file object */
+	DWORD ofs		/* File pointer from top of file */
+)
+{
+	FRESULT res;
+
+
+	res = validate(fp);					/* Check validity of the object */
+	if (res != FR_OK) LEAVE_FF(fp->fs, res);
+	if (fp->flag & FA__ERROR)			/* Check abort flag */
+		LEAVE_FF(fp->fs, FR_INT_ERR);
+
+#if _USE_FASTSEEK
+	if (fp->cltbl) {	/* Fast seek */
+		DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl;
+
+		if (ofs == CREATE_LINKMAP) {	/* Create CLMT */
+			tbl = fp->cltbl;
+			tlen = *tbl++; ulen = 2;	/* Given table size and required table size */
+			cl = fp->sclust;			/* Top of the chain */
+			if (cl) {
+				do {
+					/* Get a fragment */
+					tcl = cl; ncl = 0; ulen += 2;	/* Top, length and used items */
+					do {
+						pcl = cl; ncl++;
+						cl = get_fat(fp->fs, cl);
+						if (cl <= 1) ABORT(fp->fs, FR_INT_ERR);
+						if (cl == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
+					} while (cl == pcl + 1);
+					if (ulen <= tlen) {		/* Store the length and top of the fragment */
+						*tbl++ = ncl; *tbl++ = tcl;
+					}
+				} while (cl < fp->fs->n_fatent);	/* Repeat until end of chain */
+			}
+			*fp->cltbl = ulen;	/* Number of items used */
+			if (ulen <= tlen)
+				*tbl = 0;		/* Terminate table */
+			else
+				res = FR_NOT_ENOUGH_CORE;	/* Given table size is smaller than required */
+
+		} else {						/* Fast seek */
+			if (ofs > fp->fsize)		/* Clip offset at the file size */
+				ofs = fp->fsize;
+			fp->fptr = ofs;				/* Set file pointer */
+			if (ofs) {
+				fp->clust = clmt_clust(fp, ofs - 1);
+				dsc = clust2sect(fp->fs, fp->clust);
+				if (!dsc) ABORT(fp->fs, FR_INT_ERR);
+				dsc += (ofs - 1) / SS(fp->fs) & (fp->fs->csize - 1);
+				if (fp->fptr % SS(fp->fs) && dsc != fp->dsect) {	/* Refill sector cache if needed */
+#if !_FS_TINY
+#if !_FS_READONLY
+					if (fp->flag & FA__DIRTY) {		/* Write-back dirty sector cache */
+						if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
+							ABORT(fp->fs, FR_DISK_ERR);
+						fp->flag &= ~FA__DIRTY;
+					}
+#endif
+					if (disk_read(fp->fs->drv, fp->buf, dsc, 1) != RES_OK)	/* Load current sector */
+						ABORT(fp->fs, FR_DISK_ERR);
+#endif
+					fp->dsect = dsc;
+				}
+			}
+		}
+	} else
+#endif
+
+	/* Normal Seek */
+	{
+		DWORD clst, bcs, nsect, ifptr;
+
+		if (ofs > fp->fsize					/* In read-only mode, clip offset with the file size */
+#if !_FS_READONLY
+			 && !(fp->flag & FA_WRITE)
+#endif
+			) ofs = fp->fsize;
+
+		ifptr = fp->fptr;
+		fp->fptr = nsect = 0;
+		if (ofs) {
+			bcs = (DWORD)fp->fs->csize * SS(fp->fs);	/* Cluster size (byte) */
+			if (ifptr > 0 &&
+				(ofs - 1) / bcs >= (ifptr - 1) / bcs) {	/* When seek to same or following cluster, */
+				fp->fptr = (ifptr - 1) & ~(bcs - 1);	/* start from the current cluster */
+				ofs -= fp->fptr;
+				clst = fp->clust;
+			} else {									/* When seek to back cluster, */
+				clst = fp->sclust;						/* start from the first cluster */
+#if !_FS_READONLY
+				if (clst == 0) {						/* If no cluster chain, create a new chain */
+					clst = create_chain(fp->fs, 0);
+					if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
+					if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
+					fp->sclust = clst;
+				}
+#endif
+				fp->clust = clst;
+			}
+			if (clst != 0) {
+				while (ofs > bcs) {						/* Cluster following loop */
+#if !_FS_READONLY
+					if (fp->flag & FA_WRITE) {			/* Check if in write mode or not */
+						clst = create_chain(fp->fs, clst);	/* Force stretch if in write mode */
+						if (clst == 0) {				/* When disk gets full, clip file size */
+							ofs = bcs; break;
+						}
+					} else
+#endif
+						clst = get_fat(fp->fs, clst);	/* Follow cluster chain if not in write mode */
+					if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
+					if (clst <= 1 || clst >= fp->fs->n_fatent) ABORT(fp->fs, FR_INT_ERR);
+					fp->clust = clst;
+					fp->fptr += bcs;
+					ofs -= bcs;
+				}
+				fp->fptr += ofs;
+				if (ofs % SS(fp->fs)) {
+					nsect = clust2sect(fp->fs, clst);	/* Current sector */
+					if (!nsect) ABORT(fp->fs, FR_INT_ERR);
+					nsect += ofs / SS(fp->fs);
+				}
+			}
+		}
+		if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) {	/* Fill sector cache if needed */
+#if !_FS_TINY
+#if !_FS_READONLY
+			if (fp->flag & FA__DIRTY) {			/* Write-back dirty sector cache */
+				if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
+					ABORT(fp->fs, FR_DISK_ERR);
+				fp->flag &= ~FA__DIRTY;
+			}
+#endif
+			if (disk_read(fp->fs->drv, fp->buf, nsect, 1) != RES_OK)	/* Fill sector cache */
+				ABORT(fp->fs, FR_DISK_ERR);
+#endif
+			fp->dsect = nsect;
+		}
+#if !_FS_READONLY
+		if (fp->fptr > fp->fsize) {			/* Set file change flag if the file size is extended */
+			fp->fsize = fp->fptr;
+			fp->flag |= FA__WRITTEN;
+		}
+#endif
+	}
+
+	LEAVE_FF(fp->fs, res);
+}
+
+
+
+#if _FS_MINIMIZE <= 1
+/*-----------------------------------------------------------------------*/
+/* Create a Directory Object                                             */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_opendir (
+	DIR *dj,			/* Pointer to directory object to create */
+	const TCHAR *path	/* Pointer to the directory path */
+)
+{
+	FRESULT res;
+	FATFS *fs;
+	DEF_NAMEBUF;
+
+
+	if (!dj) return FR_INVALID_OBJECT;
+
+	res = chk_mounted(&path, &dj->fs, 0);
+	fs = dj->fs;
+	if (res == FR_OK) {
+		INIT_BUF(*dj);
+		res = follow_path(dj, path);			/* Follow the path to the directory */
+		FREE_BUF();
+		if (res == FR_OK) {						/* Follow completed */
+			if (dj->dir) {						/* It is not the root dir */
+				if (dj->dir[DIR_Attr] & AM_DIR) {	/* The object is a directory */
+					dj->sclust = ld_clust(fs, dj->dir);
+				} else {						/* The object is not a directory */
+					res = FR_NO_PATH;
+				}
+			}
+			if (res == FR_OK) {
+				dj->id = fs->id;
+				res = dir_sdi(dj, 0);			/* Rewind dir */
+			}
+		}
+		if (res == FR_NO_FILE) res = FR_NO_PATH;
+		if (res != FR_OK) dj->fs = 0;			/* Invalidate the dir object if function faild */
+	} else {
+		dj->fs = 0;
+	}
+
+	LEAVE_FF(fs, res);
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Read Directory Entry in Sequence                                      */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_readdir (
+	DIR *dj,			/* Pointer to the open directory object */
+	FILINFO *fno		/* Pointer to file information to return */
+)
+{
+	FRESULT res;
+	DEF_NAMEBUF;
+
+
+	res = validate(dj);						/* Check validity of the object */
+	if (res == FR_OK) {
+		if (!fno) {
+			res = dir_sdi(dj, 0);			/* Rewind the directory object */
+		} else {
+			INIT_BUF(*dj);
+			res = dir_read(dj, 0);			/* Read an item */
+			if (res == FR_NO_FILE) {		/* Reached end of dir */
+				dj->sect = 0;
+				res = FR_OK;
+			}
+			if (res == FR_OK) {				/* A valid entry is found */
+				get_fileinfo(dj, fno);		/* Get the object information */
+				res = dir_next(dj, 0);		/* Increment index for next */
+				if (res == FR_NO_FILE) {
+					dj->sect = 0;
+					res = FR_OK;
+				}
+			}
+			FREE_BUF();
+		}
+	}
+
+	LEAVE_FF(dj->fs, res);
+}
+
+
+
+#if _FS_MINIMIZE == 0
+/*-----------------------------------------------------------------------*/
+/* Get File Status                                                       */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_stat (
+	const TCHAR *path,	/* Pointer to the file path */
+	FILINFO *fno		/* Pointer to file information to return */
+)
+{
+	FRESULT res;
+	DIR dj;
+	DEF_NAMEBUF;
+
+
+	res = chk_mounted(&path, &dj.fs, 0);
+	if (res == FR_OK) {
+		INIT_BUF(dj);
+		res = follow_path(&dj, path);	/* Follow the file path */
+		if (res == FR_OK) {				/* Follow completed */
+			if (dj.dir)		/* Found an object */
+				get_fileinfo(&dj, fno);
+			else			/* It is root dir */
+				res = FR_INVALID_NAME;
+		}
+		FREE_BUF();
+	}
+
+	LEAVE_FF(dj.fs, res);
+}
+
+
+
+#if !_FS_READONLY
+/*-----------------------------------------------------------------------*/
+/* Get Number of Free Clusters                                           */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_getfree (
+	const TCHAR *path,	/* Path name of the logical drive number */
+	DWORD *nclst,		/* Pointer to a variable to return number of free clusters */
+	FATFS **fatfs		/* Pointer to return pointer to corresponding file system object */
+)
+{
+	FRESULT res;
+	FATFS *fs;
+	DWORD n, clst, sect, stat;
+	UINT i;
+	BYTE fat, *p;
+
+
+	/* Get drive number */
+	res = chk_mounted(&path, fatfs, 0);
+	fs = *fatfs;
+	if (res == FR_OK) {
+		/* If free_clust is valid, return it without full cluster scan */
+		if (fs->free_clust <= fs->n_fatent - 2) {
+			*nclst = fs->free_clust;
+		} else {
+			/* Get number of free clusters */
+			fat = fs->fs_type;
+			n = 0;
+			if (fat == FS_FAT12) {
+				clst = 2;
+				do {
+					stat = get_fat(fs, clst);
+					if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }
+					if (stat == 1) { res = FR_INT_ERR; break; }
+					if (stat == 0) n++;
+				} while (++clst < fs->n_fatent);
+			} else {
+				clst = fs->n_fatent;
+				sect = fs->fatbase;
+				i = 0; p = 0;
+				do {
+					if (!i) {
+						res = move_window(fs, sect++);
+						if (res != FR_OK) break;
+						p = fs->win;
+						i = SS(fs);
+					}
+					if (fat == FS_FAT16) {
+						if (LD_WORD(p) == 0) n++;
+						p += 2; i -= 2;
+					} else {
+						if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) n++;
+						p += 4; i -= 4;
+					}
+				} while (--clst);
+			}
+			fs->free_clust = n;
+			if (fat == FS_FAT32) fs->fsi_flag = 1;
+			*nclst = n;
+		}
+	}
+	LEAVE_FF(fs, res);
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Truncate File                                                         */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_truncate (
+	FIL *fp		/* Pointer to the file object */
+)
+{
+	FRESULT res;
+	DWORD ncl;
+
+
+	res = validate(fp);						/* Check validity of the object */
+	if (res == FR_OK) {
+		if (fp->flag & FA__ERROR) {			/* Check abort flag */
+			res = FR_INT_ERR;
+		} else {
+			if (!(fp->flag & FA_WRITE))		/* Check access mode */
+				res = FR_DENIED;
+		}
+	}
+	if (res == FR_OK) {
+		if (fp->fsize > fp->fptr) {
+			fp->fsize = fp->fptr;	/* Set file size to current R/W point */
+			fp->flag |= FA__WRITTEN;
+			if (fp->fptr == 0) {	/* When set file size to zero, remove entire cluster chain */
+				res = remove_chain(fp->fs, fp->sclust);
+				fp->sclust = 0;
+			} else {				/* When truncate a part of the file, remove remaining clusters */
+				ncl = get_fat(fp->fs, fp->clust);
+				res = FR_OK;
+				if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR;
+				if (ncl == 1) res = FR_INT_ERR;
+				if (res == FR_OK && ncl < fp->fs->n_fatent) {
+					res = put_fat(fp->fs, fp->clust, 0x0FFFFFFF);
+					if (res == FR_OK) res = remove_chain(fp->fs, ncl);
+				}
+			}
+		}
+		if (res != FR_OK) fp->flag |= FA__ERROR;
+	}
+
+	LEAVE_FF(fp->fs, res);
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Delete a File or Directory                                            */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_unlink (
+	const TCHAR *path		/* Pointer to the file or directory path */
+)
+{
+	FRESULT res;
+	DIR dj, sdj;
+	BYTE *dir;
+	DWORD dclst;
+	DEF_NAMEBUF;
+
+
+	res = chk_mounted(&path, &dj.fs, 1);
+	if (res == FR_OK) {
+		INIT_BUF(dj);
+		res = follow_path(&dj, path);		/* Follow the file path */
+		if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
+			res = FR_INVALID_NAME;			/* Cannot remove dot entry */
+#if _FS_LOCK
+		if (res == FR_OK) res = chk_lock(&dj, 2);	/* Cannot remove open file */
+#endif
+		if (res == FR_OK) {					/* The object is accessible */
+			dir = dj.dir;
+			if (!dir) {
+				res = FR_INVALID_NAME;		/* Cannot remove the start directory */
+			} else {
+				if (dir[DIR_Attr] & AM_RDO)
+					res = FR_DENIED;		/* Cannot remove R/O object */
+			}
+			dclst = ld_clust(dj.fs, dir);
+			if (res == FR_OK && (dir[DIR_Attr] & AM_DIR)) {	/* Is it a sub-dir? */
+				if (dclst < 2) {
+					res = FR_INT_ERR;
+				} else {
+					mem_cpy(&sdj, &dj, sizeof (DIR));	/* Check if the sub-dir is empty or not */
+					sdj.sclust = dclst;
+					res = dir_sdi(&sdj, 2);		/* Exclude dot entries */
+					if (res == FR_OK) {
+						res = dir_read(&sdj, 0);	/* Read an item */
+						if (res == FR_OK		/* Not empty dir */
+#if _FS_RPATH
+						|| dclst == dj.fs->cdir	/* Current dir */
+#endif
+						) res = FR_DENIED;
+						if (res == FR_NO_FILE) res = FR_OK;	/* Empty */
+					}
+				}
+			}
+			if (res == FR_OK) {
+				res = dir_remove(&dj);		/* Remove the directory entry */
+				if (res == FR_OK) {
+					if (dclst)				/* Remove the cluster chain if exist */
+						res = remove_chain(dj.fs, dclst);
+					if (res == FR_OK) res = sync_fs(dj.fs);
+				}
+			}
+		}
+		FREE_BUF();
+	}
+
+	LEAVE_FF(dj.fs, res);
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Create a Directory                                                    */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_mkdir (
+	const TCHAR *path		/* Pointer to the directory path */
+)
+{
+	FRESULT res;
+	DIR dj;
+	BYTE *dir, n;
+	DWORD dsc, dcl, pcl, tm = get_fattime();
+	DEF_NAMEBUF;
+
+
+	res = chk_mounted(&path, &dj.fs, 1);
+	if (res == FR_OK) {
+		INIT_BUF(dj);
+		res = follow_path(&dj, path);			/* Follow the file path */
+		if (res == FR_OK) res = FR_EXIST;		/* Any object with same name is already existing */
+		if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NS] & NS_DOT))
+			res = FR_INVALID_NAME;
+		if (res == FR_NO_FILE) {				/* Can create a new directory */
+			dcl = create_chain(dj.fs, 0);		/* Allocate a cluster for the new directory table */
+			res = FR_OK;
+			if (dcl == 0) res = FR_DENIED;		/* No space to allocate a new cluster */
+			if (dcl == 1) res = FR_INT_ERR;
+			if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR;
+			if (res == FR_OK)					/* Flush FAT */
+				res = sync_window(dj.fs);
+			if (res == FR_OK) {					/* Initialize the new directory table */
+				dsc = clust2sect(dj.fs, dcl);
+				dir = dj.fs->win;
+				mem_set(dir, 0, SS(dj.fs));
+				mem_set(dir+DIR_Name, ' ', 11);	/* Create "." entry */
+				dir[DIR_Name] = '.';
+				dir[DIR_Attr] = AM_DIR;
+				ST_DWORD(dir+DIR_WrtTime, tm);
+				st_clust(dir, dcl);
+				mem_cpy(dir+SZ_DIR, dir, SZ_DIR); 	/* Create ".." entry */
+				dir[33] = '.'; pcl = dj.sclust;
+				if (dj.fs->fs_type == FS_FAT32 && pcl == dj.fs->dirbase)
+					pcl = 0;
+				st_clust(dir+SZ_DIR, pcl);
+				for (n = dj.fs->csize; n; n--) {	/* Write dot entries and clear following sectors */
+					dj.fs->winsect = dsc++;
+					dj.fs->wflag = 1;
+					res = sync_window(dj.fs);
+					if (res != FR_OK) break;
+					mem_set(dir, 0, SS(dj.fs));
+				}
+			}
+			if (res == FR_OK) res = dir_register(&dj);	/* Register the object to the directoy */
+			if (res != FR_OK) {
+				remove_chain(dj.fs, dcl);			/* Could not register, remove cluster chain */
+			} else {
+				dir = dj.dir;
+				dir[DIR_Attr] = AM_DIR;				/* Attribute */
+				ST_DWORD(dir+DIR_WrtTime, tm);		/* Created time */
+				st_clust(dir, dcl);					/* Table start cluster */
+				dj.fs->wflag = 1;
+				res = sync_fs(dj.fs);
+			}
+		}
+		FREE_BUF();
+	}
+
+	LEAVE_FF(dj.fs, res);
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Change Attribute                                                      */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_chmod (
+	const TCHAR *path,	/* Pointer to the file path */
+	BYTE value,			/* Attribute bits */
+	BYTE mask			/* Attribute mask to change */
+)
+{
+	FRESULT res;
+	DIR dj;
+	BYTE *dir;
+	DEF_NAMEBUF;
+
+
+	res = chk_mounted(&path, &dj.fs, 1);
+	if (res == FR_OK) {
+		INIT_BUF(dj);
+		res = follow_path(&dj, path);		/* Follow the file path */
+		FREE_BUF();
+		if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
+			res = FR_INVALID_NAME;
+		if (res == FR_OK) {
+			dir = dj.dir;
+			if (!dir) {						/* Is it a root directory? */
+				res = FR_INVALID_NAME;
+			} else {						/* File or sub directory */
+				mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC;	/* Valid attribute mask */
+				dir[DIR_Attr] = (value & mask) | (dir[DIR_Attr] & (BYTE)~mask);	/* Apply attribute change */
+				dj.fs->wflag = 1;
+				res = sync_fs(dj.fs);
+			}
+		}
+	}
+
+	LEAVE_FF(dj.fs, res);
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Change Timestamp                                                      */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_utime (
+	const TCHAR *path,	/* Pointer to the file/directory name */
+	const FILINFO *fno	/* Pointer to the time stamp to be set */
+)
+{
+	FRESULT res;
+	DIR dj;
+	BYTE *dir;
+	DEF_NAMEBUF;
+
+
+	res = chk_mounted(&path, &dj.fs, 1);
+	if (res == FR_OK) {
+		INIT_BUF(dj);
+		res = follow_path(&dj, path);	/* Follow the file path */
+		FREE_BUF();
+		if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
+			res = FR_INVALID_NAME;
+		if (res == FR_OK) {
+			dir = dj.dir;
+			if (!dir) {					/* Root directory */
+				res = FR_INVALID_NAME;
+			} else {					/* File or sub-directory */
+				ST_WORD(dir+DIR_WrtTime, fno->ftime);
+				ST_WORD(dir+DIR_WrtDate, fno->fdate);
+				dj.fs->wflag = 1;
+				res = sync_fs(dj.fs);
+			}
+		}
+	}
+
+	LEAVE_FF(dj.fs, res);
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Rename File/Directory                                                 */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_rename (
+	const TCHAR *path_old,	/* Pointer to the old name */
+	const TCHAR *path_new	/* Pointer to the new name */
+)
+{
+	FRESULT res;
+	DIR djo, djn;
+	BYTE buf[21], *dir;
+	DWORD dw;
+	DEF_NAMEBUF;
+
+
+	res = chk_mounted(&path_old, &djo.fs, 1);
+	if (res == FR_OK) {
+		djn.fs = djo.fs;
+		INIT_BUF(djo);
+		res = follow_path(&djo, path_old);		/* Check old object */
+		if (_FS_RPATH && res == FR_OK && (djo.fn[NS] & NS_DOT))
+			res = FR_INVALID_NAME;
+#if _FS_LOCK
+		if (res == FR_OK) res = chk_lock(&djo, 2);
+#endif
+		if (res == FR_OK) {						/* Old object is found */
+			if (!djo.dir) {						/* Is root dir? */
+				res = FR_NO_FILE;
+			} else {
+				mem_cpy(buf, djo.dir+DIR_Attr, 21);		/* Save the object information except for name */
+				mem_cpy(&djn, &djo, sizeof (DIR));		/* Check new object */
+				res = follow_path(&djn, path_new);
+				if (res == FR_OK) res = FR_EXIST;		/* The new object name is already existing */
+				if (res == FR_NO_FILE) { 				/* Is it a valid path and no name collision? */
+/* Start critical section that any interruption can cause a cross-link */
+					res = dir_register(&djn);			/* Register the new entry */
+					if (res == FR_OK) {
+						dir = djn.dir;					/* Copy object information except for name */
+						mem_cpy(dir+13, buf+2, 19);
+						dir[DIR_Attr] = buf[0] | AM_ARC;
+						djo.fs->wflag = 1;
+						if (djo.sclust != djn.sclust && (dir[DIR_Attr] & AM_DIR)) {		/* Update .. entry in the directory if needed */
+							dw = clust2sect(djo.fs, ld_clust(djo.fs, dir));
+							if (!dw) {
+								res = FR_INT_ERR;
+							} else {
+								res = move_window(djo.fs, dw);
+								dir = djo.fs->win+SZ_DIR;	/* .. entry */
+								if (res == FR_OK && dir[1] == '.') {
+									dw = (djo.fs->fs_type == FS_FAT32 && djn.sclust == djo.fs->dirbase) ? 0 : djn.sclust;
+									st_clust(dir, dw);
+									djo.fs->wflag = 1;
+								}
+							}
+						}
+						if (res == FR_OK) {
+							res = dir_remove(&djo);		/* Remove old entry */
+							if (res == FR_OK)
+								res = sync_fs(djo.fs);
+						}
+					}
+/* End critical section */
+				}
+			}
+		}
+		FREE_BUF();
+	}
+
+	LEAVE_FF(djo.fs, res);
+}
+
+#endif /* !_FS_READONLY */
+#endif /* _FS_MINIMIZE == 0 */
+#endif /* _FS_MINIMIZE <= 1 */
+#endif /* _FS_MINIMIZE <= 2 */
+
+
+
+#if _USE_LABEL
+/*-----------------------------------------------------------------------*/
+/* Get volume label                                                      */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_getlabel (
+	const TCHAR* path,	/* Path name of the logical drive number */
+	TCHAR* label,		/* Pointer to a buffer to return the volume label */
+	DWORD* sn			/* Pointer to a variable to return the volume serial number */
+)
+{
+	FRESULT res;
+	DIR dj;
+	UINT i, j;
+
+
+	/* Get logical drive */
+	res = chk_mounted(&path, &dj.fs, 0);
+
+	/* Get volume label */
+	if (res == FR_OK && label) {
+		dj.sclust = 0;					/* Open root dir */
+		res = dir_sdi(&dj, 0);
+		if (res == FR_OK) {
+			res = dir_read(&dj, 1);		/* Get an entry with AM_VOL */
+			if (res == FR_OK) {			/* A volume label is exist */
+#if _LFN_UNICODE
+				WCHAR w;
+				i = j = 0;
+				do {
+					w = (i < 11) ? dj.dir[i++] : ' ';
+					if (IsDBCS1(w) && i < 11 && IsDBCS2(dj.dir[i]))
+						w = (w << 8) | dj.dir[i++];
+					label[j++] = ff_convert(w, 1);
+				} while (j < 11);
+#else
+				mem_cpy(label, dj.dir, 11);
+#endif
+				j = 11;
+				do {
+					label[j] = 0;
+					if (!j) break;
+				} while (label[--j] == ' ');
+			}
+			if (res == FR_NO_FILE) {	/* No label, return nul string */
+				label[0] = 0;
+				res = FR_OK;
+			}
+		}
+	}
+
+	/* Get volume serial number */
+	if (res == FR_OK && sn) {
+		res = move_window(dj.fs, dj.fs->volbase);
+		if (res == FR_OK) {
+			i = dj.fs->fs_type == FS_FAT32 ? BS_VolID32 : BS_VolID;
+			*sn = LD_DWORD(&dj.fs->win[i]);
+		}
+	}
+
+	LEAVE_FF(dj.fs, res);
+}
+
+
+
+#if !_FS_READONLY
+/*-----------------------------------------------------------------------*/
+/* Set volume label                                                      */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_setlabel (
+	const TCHAR* label	/* Pointer to the volume label to set */
+)
+{
+	FRESULT res;
+	DIR dj;
+	BYTE vn[11];
+	UINT i, j, sl;
+	WCHAR w;
+	DWORD tm;
+
+
+	/* Get logical drive */
+	res = chk_mounted(&label, &dj.fs, 1);
+	if (res) LEAVE_FF(dj.fs, res);
+
+	/* Create a volume label in directory form */
+	vn[0] = 0;
+	for (sl = 0; label[sl]; sl++) ;				/* Get name length */
+	for ( ; sl && label[sl-1] == ' '; sl--) ;	/* Remove trailing spaces */
+	if (sl) {	/* Create volume label in directory form */
+		i = j = 0;
+		do {
+#if _LFN_UNICODE
+			w = ff_convert(ff_wtoupper(label[i++]), 0);
+#else
+			w = (BYTE)label[i++];
+			if (IsDBCS1(w))
+				w = (j < 10 && i < sl && IsDBCS2(label[i])) ? (w << 8) | (BYTE)label[i++] : 0;
+#if _USE_LFN
+			w = ff_convert(ff_wtoupper(ff_convert(w, 1)), 0);
+#else
+			if (IsLower(w)) w -= 0x20;			/* To upper ASCII chars */
+#ifdef _EXCVT
+			if (w >= 0x80) w = ExCvt[w - 0x80];	/* To upper extended chars (SBCS cfg) */
+#else
+			if (!_DF1S && w >= 0x80) w = 0;		/* Reject extended chars (ASCII cfg) */
+#endif
+#endif
+#endif
+			if (!w || chk_chr("\"*+,.:;<=>\?[]|\x7F", w) || j >= (UINT)((w >= 0x100) ? 10 : 11)) /* Reject invalid chars for volume label */
+				LEAVE_FF(dj.fs, FR_INVALID_NAME);
+			if (w >= 0x100) vn[j++] = (BYTE)(w >> 8);
+			vn[j++] = (BYTE)w;
+		} while (i < sl);
+		while (j < 11) vn[j++] = ' ';
+	}
+
+	/* Set volume label */
+	dj.sclust = 0;					/* Open root dir */
+	res = dir_sdi(&dj, 0);
+	if (res == FR_OK) {
+		res = dir_read(&dj, 1);		/* Get an entry with AM_VOL */
+		if (res == FR_OK) {			/* A volume label is found */
+			if (vn[0]) {
+				mem_cpy(dj.dir, vn, 11);	/* Change the volume label name */
+				tm = get_fattime();
+				ST_DWORD(dj.dir+DIR_WrtTime, tm);
+			} else {
+				dj.dir[0] = DDE;			/* Remove the volume label */
+			}
+			dj.fs->wflag = 1;
+			res = sync_fs(dj.fs);
+		} else {					/* No volume label is found or error */
+			if (res == FR_NO_FILE) {
+				res = FR_OK;
+				if (vn[0]) {				/* Create volume label as new */
+					res = dir_alloc(&dj, 1);	/* Allocate an entry for volume label */
+					if (res == FR_OK) {
+						mem_set(dj.dir, 0, SZ_DIR);	/* Set volume label */
+						mem_cpy(dj.dir, vn, 11);
+						dj.dir[DIR_Attr] = AM_VOL;
+						tm = get_fattime();
+						ST_DWORD(dj.dir+DIR_WrtTime, tm);
+						dj.fs->wflag = 1;
+						res = sync_fs(dj.fs);
+					}
+				}
+			}
+		}
+	}
+
+	LEAVE_FF(dj.fs, res);
+}
+
+#endif /* !_FS_READONLY */
+#endif /* _USE_LABEL */
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Forward data to the stream directly (available on only tiny cfg)      */
+/*-----------------------------------------------------------------------*/
+#if _USE_FORWARD && _FS_TINY
+
+FRESULT f_forward (
+	FIL *fp, 						/* Pointer to the file object */
+	UINT (*func)(const BYTE*,UINT),	/* Pointer to the streaming function */
+	UINT btf,						/* Number of bytes to forward */
+	UINT *bf						/* Pointer to number of bytes forwarded */
+)
+{
+	FRESULT res;
+	DWORD remain, clst, sect;
+	UINT rcnt;
+	BYTE csect;
+
+
+	*bf = 0;	/* Clear transfer byte counter */
+
+	res = validate(fp);								/* Check validity of the object */
+	if (res != FR_OK) LEAVE_FF(fp->fs, res);
+	if (fp->flag & FA__ERROR)						/* Check error flag */
+		LEAVE_FF(fp->fs, FR_INT_ERR);
+	if (!(fp->flag & FA_READ))						/* Check access mode */
+		LEAVE_FF(fp->fs, FR_DENIED);
+
+	remain = fp->fsize - fp->fptr;
+	if (btf > remain) btf = (UINT)remain;			/* Truncate btf by remaining bytes */
+
+	for ( ;  btf && (*func)(0, 0);					/* Repeat until all data transferred or stream becomes busy */
+		fp->fptr += rcnt, *bf += rcnt, btf -= rcnt) {
+		csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1));	/* Sector offset in the cluster */
+		if ((fp->fptr % SS(fp->fs)) == 0) {			/* On the sector boundary? */
+			if (!csect) {							/* On the cluster boundary? */
+				clst = (fp->fptr == 0) ?			/* On the top of the file? */
+					fp->sclust : get_fat(fp->fs, fp->clust);
+				if (clst <= 1) ABORT(fp->fs, FR_INT_ERR);
+				if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
+				fp->clust = clst;					/* Update current cluster */
+			}
+		}
+		sect = clust2sect(fp->fs, fp->clust);		/* Get current data sector */
+		if (!sect) ABORT(fp->fs, FR_INT_ERR);
+		sect += csect;
+		if (move_window(fp->fs, sect))				/* Move sector window */
+			ABORT(fp->fs, FR_DISK_ERR);
+		fp->dsect = sect;
+		rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs));	/* Forward data from sector window */
+		if (rcnt > btf) rcnt = btf;
+		rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % SS(fp->fs)], rcnt);
+		if (!rcnt) ABORT(fp->fs, FR_INT_ERR);
+	}
+
+	LEAVE_FF(fp->fs, FR_OK);
+}
+#endif /* _USE_FORWARD */
+
+
+
+#if _USE_MKFS && !_FS_READONLY
+/*-----------------------------------------------------------------------*/
+/* Create File System on the Drive                                       */
+/*-----------------------------------------------------------------------*/
+#define N_ROOTDIR	512		/* Number of root dir entries for FAT12/16 */
+#define N_FATS		1		/* Number of FAT copies (1 or 2) */
+
+
+FRESULT f_mkfs (
+	BYTE vol,		/* Logical drive number */
+	BYTE sfd,		/* Partitioning rule 0:FDISK, 1:SFD */
+	UINT au			/* Allocation unit size [bytes] */
+)
+{
+	static const WORD vst[] = { 1024,   512,  256,  128,   64,    32,   16,    8,    4,    2,   0};
+	static const WORD cst[] = {32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512};
+	BYTE fmt, md, sys, *tbl, pdrv, part;
+	DWORD n_clst, vs, n, wsect;
+	UINT i;
+	DWORD b_vol, b_fat, b_dir, b_data;	/* LBA */
+	DWORD n_vol, n_rsv, n_fat, n_dir;	/* Size */
+	FATFS *fs;
+	DSTATUS stat;
+
+
+	/* Check mounted drive and clear work area */
+	if (vol >= _VOLUMES) return FR_INVALID_DRIVE;
+	if (sfd > 1) return FR_INVALID_PARAMETER;
+	if (au & (au - 1)) return FR_INVALID_PARAMETER;
+	fs = FatFs[vol];
+	if (!fs) return FR_NOT_ENABLED;
+	fs->fs_type = 0;
+	pdrv = LD2PD(vol);	/* Physical drive */
+	part = LD2PT(vol);	/* Partition (0:auto detect, 1-4:get from partition table)*/
+
+	/* Get disk statics */
+	stat = disk_initialize(pdrv);
+	if (stat & STA_NOINIT) return FR_NOT_READY;
+	if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
+#if _MAX_SS != 512					/* Get disk sector size */
+	if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > _MAX_SS)
+		return FR_DISK_ERR;
+#endif
+	if (_MULTI_PARTITION && part) {
+		/* Get partition information from partition table in the MBR */
+		if (disk_read(pdrv, fs->win, 0, 1) != RES_OK) return FR_DISK_ERR;
+		if (LD_WORD(fs->win+BS_55AA) != 0xAA55) return FR_MKFS_ABORTED;
+		tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE];
+		if (!tbl[4]) return FR_MKFS_ABORTED;	/* No partition? */
+		b_vol = LD_DWORD(tbl+8);	/* Volume start sector */
+		n_vol = LD_DWORD(tbl+12);	/* Volume size */
+	} else {
+		/* Create a partition in this function */
+		if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &n_vol) != RES_OK || n_vol < 128)
+			return FR_DISK_ERR;
+		b_vol = (sfd) ? 0 : 63;		/* Volume start sector */
+		n_vol -= b_vol;				/* Volume size */
+	}
+
+	if (!au) {				/* AU auto selection */
+		vs = n_vol / (2000 / (SS(fs) / 512));
+		for (i = 0; vs < vst[i]; i++) ;
+		au = cst[i];
+	}
+	au /= SS(fs);		/* Number of sectors per cluster */
+	if (au == 0) au = 1;
+	if (au > 128) au = 128;
+
+	/* Pre-compute number of clusters and FAT sub-type */
+	n_clst = n_vol / au;
+	fmt = FS_FAT12;
+	if (n_clst >= MIN_FAT16) fmt = FS_FAT16;
+	if (n_clst >= MIN_FAT32) fmt = FS_FAT32;
+
+	/* Determine offset and size of FAT structure */
+	if (fmt == FS_FAT32) {
+		n_fat = ((n_clst * 4) + 8 + SS(fs) - 1) / SS(fs);
+		n_rsv = 32;
+		n_dir = 0;
+	} else {
+		n_fat = (fmt == FS_FAT12) ? (n_clst * 3 + 1) / 2 + 3 : (n_clst * 2) + 4;
+		n_fat = (n_fat + SS(fs) - 1) / SS(fs);
+		n_rsv = 1;
+		n_dir = (DWORD)N_ROOTDIR * SZ_DIR / SS(fs);
+	}
+	b_fat = b_vol + n_rsv;				/* FAT area start sector */
+	b_dir = b_fat + n_fat * N_FATS;		/* Directory area start sector */
+	b_data = b_dir + n_dir;				/* Data area start sector */
+	if (n_vol < b_data + au - b_vol) return FR_MKFS_ABORTED;	/* Too small volume */
+
+	/* Align data start sector to erase block boundary (for flash memory media) */
+	if (disk_ioctl(pdrv, GET_BLOCK_SIZE, &n) != RES_OK || !n || n > 32768) n = 1;
+	n = (b_data + n - 1) & ~(n - 1);	/* Next nearest erase block from current data start */
+	n = (n - b_data) / N_FATS;
+	if (fmt == FS_FAT32) {		/* FAT32: Move FAT offset */
+		n_rsv += n;
+		b_fat += n;
+	} else {					/* FAT12/16: Expand FAT size */
+		n_fat += n;
+	}
+
+	/* Determine number of clusters and final check of validity of the FAT sub-type */
+	n_clst = (n_vol - n_rsv - n_fat * N_FATS - n_dir) / au;
+	if (   (fmt == FS_FAT16 && n_clst < MIN_FAT16)
+		|| (fmt == FS_FAT32 && n_clst < MIN_FAT32))
+		return FR_MKFS_ABORTED;
+
+	switch (fmt) {	/* Determine system ID for partition table */
+	case FS_FAT12:	sys = 0x01; break;
+	case FS_FAT16:	sys = (n_vol < 0x10000) ? 0x04 : 0x06; break;
+	default: 		sys = 0x0C;
+	}
+
+	if (_MULTI_PARTITION && part) {
+		/* Update system ID in the partition table */
+		tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE];
+		tbl[4] = sys;
+		if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) return FR_DISK_ERR;
+		md = 0xF8;
+	} else {
+		if (sfd) {	/* No partition table (SFD) */
+			md = 0xF0;
+		} else {	/* Create partition table (FDISK) */
+			mem_set(fs->win, 0, SS(fs));
+			tbl = fs->win+MBR_Table;	/* Create partition table for single partition in the drive */
+			tbl[1] = 1;						/* Partition start head */
+			tbl[2] = 1;						/* Partition start sector */
+			tbl[3] = 0;						/* Partition start cylinder */
+			tbl[4] = sys;					/* System type */
+			tbl[5] = 254;					/* Partition end head */
+			n = (b_vol + n_vol) / 63 / 255;
+			tbl[6] = (BYTE)((n >> 2) | 63);	/* Partition end sector */
+			tbl[7] = (BYTE)n;				/* End cylinder */
+			ST_DWORD(tbl+8, 63);			/* Partition start in LBA */
+			ST_DWORD(tbl+12, n_vol);		/* Partition size in LBA */
+			ST_WORD(fs->win+BS_55AA, 0xAA55);	/* MBR signature */
+			if (disk_write(pdrv, fs->win, 0, 1) != RES_OK)	/* Write it to the MBR sector */
+				return FR_DISK_ERR;
+			md = 0xF8;
+		}
+	}
+
+	/* Create BPB in the VBR */
+	tbl = fs->win;							/* Clear sector */
+	mem_set(tbl, 0, SS(fs));
+	mem_cpy(tbl, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code, OEM name */
+	i = SS(fs);								/* Sector size */
+	ST_WORD(tbl+BPB_BytsPerSec, i);
+	tbl[BPB_SecPerClus] = (BYTE)au;			/* Sectors per cluster */
+	ST_WORD(tbl+BPB_RsvdSecCnt, n_rsv);		/* Reserved sectors */
+	tbl[BPB_NumFATs] = N_FATS;				/* Number of FATs */
+	i = (fmt == FS_FAT32) ? 0 : N_ROOTDIR;	/* Number of rootdir entries */
+	ST_WORD(tbl+BPB_RootEntCnt, i);
+	if (n_vol < 0x10000) {					/* Number of total sectors */
+		ST_WORD(tbl+BPB_TotSec16, n_vol);
+	} else {
+		ST_DWORD(tbl+BPB_TotSec32, n_vol);
+	}
+	tbl[BPB_Media] = md;					/* Media descriptor */
+	ST_WORD(tbl+BPB_SecPerTrk, 63);			/* Number of sectors per track */
+	ST_WORD(tbl+BPB_NumHeads, 255);			/* Number of heads */
+	ST_DWORD(tbl+BPB_HiddSec, b_vol);		/* Hidden sectors */
+	n = get_fattime();						/* Use current time as VSN */
+	if (fmt == FS_FAT32) {
+		ST_DWORD(tbl+BS_VolID32, n);		/* VSN */
+		ST_DWORD(tbl+BPB_FATSz32, n_fat);	/* Number of sectors per FAT */
+		ST_DWORD(tbl+BPB_RootClus, 2);		/* Root directory start cluster (2) */
+		ST_WORD(tbl+BPB_FSInfo, 1);			/* FSInfo record offset (VBR+1) */
+		ST_WORD(tbl+BPB_BkBootSec, 6);		/* Backup boot record offset (VBR+6) */
+		tbl[BS_DrvNum32] = 0x80;			/* Drive number */
+		tbl[BS_BootSig32] = 0x29;			/* Extended boot signature */
+		mem_cpy(tbl+BS_VolLab32, "NO NAME    " "FAT32   ", 19);	/* Volume label, FAT signature */
+	} else {
+		ST_DWORD(tbl+BS_VolID, n);			/* VSN */
+		ST_WORD(tbl+BPB_FATSz16, n_fat);	/* Number of sectors per FAT */
+		tbl[BS_DrvNum] = 0x80;				/* Drive number */
+		tbl[BS_BootSig] = 0x29;				/* Extended boot signature */
+		mem_cpy(tbl+BS_VolLab, "NO NAME    " "FAT     ", 19);	/* Volume label, FAT signature */
+	}
+	ST_WORD(tbl+BS_55AA, 0xAA55);			/* Signature (Offset is fixed here regardless of sector size) */
+	if (disk_write(pdrv, tbl, b_vol, 1) != RES_OK)	/* Write it to the VBR sector */
+		return FR_DISK_ERR;
+	if (fmt == FS_FAT32)							/* Write backup VBR if needed (VBR+6) */
+		disk_write(pdrv, tbl, b_vol + 6, 1);
+
+	/* Initialize FAT area */
+	wsect = b_fat;
+	for (i = 0; i < N_FATS; i++) {		/* Initialize each FAT copy */
+		mem_set(tbl, 0, SS(fs));			/* 1st sector of the FAT  */
+		n = md;								/* Media descriptor byte */
+		if (fmt != FS_FAT32) {
+			n |= (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00;
+			ST_DWORD(tbl+0, n);				/* Reserve cluster #0-1 (FAT12/16) */
+		} else {
+			n |= 0xFFFFFF00;
+			ST_DWORD(tbl+0, n);				/* Reserve cluster #0-1 (FAT32) */
+			ST_DWORD(tbl+4, 0xFFFFFFFF);
+			ST_DWORD(tbl+8, 0x0FFFFFFF);	/* Reserve cluster #2 for root dir */
+		}
+		if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
+			return FR_DISK_ERR;
+		mem_set(tbl, 0, SS(fs));			/* Fill following FAT entries with zero */
+		for (n = 1; n < n_fat; n++) {		/* This loop may take a time on FAT32 volume due to many single sector writes */
+			if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
+				return FR_DISK_ERR;
+		}
+	}
+
+	/* Initialize root directory */
+	i = (fmt == FS_FAT32) ? au : n_dir;
+	do {
+		if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
+			return FR_DISK_ERR;
+	} while (--i);
+
+#if _USE_ERASE	/* Erase data area if needed */
+	{
+		DWORD eb[2];
+
+		eb[0] = wsect; eb[1] = wsect + (n_clst - ((fmt == FS_FAT32) ? 1 : 0)) * au - 1;
+		disk_ioctl(pdrv, CTRL_ERASE_SECTOR, eb);
+	}
+#endif
+
+	/* Create FSInfo if needed */
+	if (fmt == FS_FAT32) {
+		ST_DWORD(tbl+FSI_LeadSig, 0x41615252);
+		ST_DWORD(tbl+FSI_StrucSig, 0x61417272);
+		ST_DWORD(tbl+FSI_Free_Count, n_clst - 1);	/* Number of free clusters */
+		ST_DWORD(tbl+FSI_Nxt_Free, 2);				/* Last allocated cluster# */
+		ST_WORD(tbl+BS_55AA, 0xAA55);
+		disk_write(pdrv, tbl, b_vol + 1, 1);	/* Write original (VBR+1) */
+		disk_write(pdrv, tbl, b_vol + 7, 1);	/* Write backup (VBR+7) */
+	}
+
+	return (disk_ioctl(pdrv, CTRL_SYNC, 0) == RES_OK) ? FR_OK : FR_DISK_ERR;
+}
+
+
+#if _MULTI_PARTITION
+/*-----------------------------------------------------------------------*/
+/* Divide Physical Drive                                                 */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_fdisk (
+	BYTE pdrv,			/* Physical drive number */
+	const DWORD szt[],	/* Pointer to the size table for each partitions */
+	void* work			/* Pointer to the working buffer */
+)
+{
+	UINT i, n, sz_cyl, tot_cyl, b_cyl, e_cyl, p_cyl;
+	BYTE s_hd, e_hd, *p, *buf = (BYTE*)work;
+	DSTATUS stat;
+	DWORD sz_disk, sz_part, s_part;
+
+
+	stat = disk_initialize(pdrv);
+	if (stat & STA_NOINIT) return FR_NOT_READY;
+	if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
+	if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_disk)) return FR_DISK_ERR;
+
+	/* Determine CHS in the table regardless of the drive geometry */
+	for (n = 16; n < 256 && sz_disk / n / 63 > 1024; n *= 2) ;
+	if (n == 256) n--;
+	e_hd = n - 1;
+	sz_cyl = 63 * n;
+	tot_cyl = sz_disk / sz_cyl;
+
+	/* Create partition table */
+	mem_set(buf, 0, _MAX_SS);
+	p = buf + MBR_Table; b_cyl = 0;
+	for (i = 0; i < 4; i++, p += SZ_PTE) {
+		p_cyl = (szt[i] <= 100) ? (DWORD)tot_cyl * szt[i] / 100 : szt[i] / sz_cyl;
+		if (!p_cyl) continue;
+		s_part = (DWORD)sz_cyl * b_cyl;
+		sz_part = (DWORD)sz_cyl * p_cyl;
+		if (i == 0) {	/* Exclude first track of cylinder 0 */
+			s_hd = 1;
+			s_part += 63; sz_part -= 63;
+		} else {
+			s_hd = 0;
+		}
+		e_cyl = b_cyl + p_cyl - 1;
+		if (e_cyl >= tot_cyl) return FR_INVALID_PARAMETER;
+
+		/* Set partition table */
+		p[1] = s_hd;						/* Start head */
+		p[2] = (BYTE)((b_cyl >> 2) + 1);	/* Start sector */
+		p[3] = (BYTE)b_cyl;					/* Start cylinder */
+		p[4] = 0x06;						/* System type (temporary setting) */
+		p[5] = e_hd;						/* End head */
+		p[6] = (BYTE)((e_cyl >> 2) + 63);	/* End sector */
+		p[7] = (BYTE)e_cyl;					/* End cylinder */
+		ST_DWORD(p + 8, s_part);			/* Start sector in LBA */
+		ST_DWORD(p + 12, sz_part);			/* Partition size */
+
+		/* Next partition */
+		b_cyl += p_cyl;
+	}
+	ST_WORD(p, 0xAA55);
+
+	/* Write it to the MBR */
+	return (disk_write(pdrv, buf, 0, 1) || disk_ioctl(pdrv, CTRL_SYNC, 0)) ? FR_DISK_ERR : FR_OK;
+}
+
+
+#endif /* _MULTI_PARTITION */
+#endif /* _USE_MKFS && !_FS_READONLY */
+
+
+
+
+#if _USE_STRFUNC
+/*-----------------------------------------------------------------------*/
+/* Get a string from the file                                            */
+/*-----------------------------------------------------------------------*/
+
+TCHAR* f_gets (
+	TCHAR* buff,	/* Pointer to the string buffer to read */
+	int len,		/* Size of string buffer (characters) */
+	FIL* fp			/* Pointer to the file object */
+)
+{
+	int n = 0;
+	TCHAR c, *p = buff;
+	BYTE s[2];
+	UINT rc;
+
+
+	while (n < len - 1) {			/* Read bytes until buffer gets filled */
+		f_read(fp, s, 1, &rc);
+		if (rc != 1) break;			/* Break on EOF or error */
+		c = s[0];
+#if _LFN_UNICODE					/* Read a character in UTF-8 encoding */
+		if (c >= 0x80) {
+			if (c < 0xC0) continue;	/* Skip stray trailer */
+			if (c < 0xE0) {			/* Two-byte sequence */
+				f_read(fp, s, 1, &rc);
+				if (rc != 1) break;
+				c = ((c & 0x1F) << 6) | (s[0] & 0x3F);
+				if (c < 0x80) c = '?';
+			} else {
+				if (c < 0xF0) {		/* Three-byte sequence */
+					f_read(fp, s, 2, &rc);
+					if (rc != 2) break;
+					c = (c << 12) | ((s[0] & 0x3F) << 6) | (s[1] & 0x3F);
+					if (c < 0x800) c = '?';
+				} else {			/* Reject four-byte sequence */
+					c = '?';
+				}
+			}
+		}
+#endif
+#if _USE_STRFUNC >= 2
+		if (c == '\r') continue;	/* Strip '\r' */
+#endif
+		*p++ = c;
+		n++;
+		if (c == '\n') break;		/* Break on EOL */
+	}
+	*p = 0;
+	return n ? buff : 0;			/* When no data read (eof or error), return with error. */
+}
+
+
+
+#if !_FS_READONLY
+#include <stdarg.h>
+/*-----------------------------------------------------------------------*/
+/* Put a character to the file                                           */
+/*-----------------------------------------------------------------------*/
+
+int f_putc (
+	TCHAR c,	/* A character to be output */
+	FIL* fp		/* Pointer to the file object */
+)
+{
+	UINT bw, btw;
+	BYTE s[3];
+
+
+#if _USE_STRFUNC >= 2
+	if (c == '\n') f_putc ('\r', fp);	/* LF -> CRLF conversion */
+#endif
+
+#if _LFN_UNICODE	/* Write the character in UTF-8 encoding */
+	if (c < 0x80) {			/* 7-bit */
+		s[0] = (BYTE)c;
+		btw = 1;
+	} else {
+		if (c < 0x800) {	/* 11-bit */
+			s[0] = (BYTE)(0xC0 | (c >> 6));
+			s[1] = (BYTE)(0x80 | (c & 0x3F));
+			btw = 2;
+		} else {			/* 16-bit */
+			s[0] = (BYTE)(0xE0 | (c >> 12));
+			s[1] = (BYTE)(0x80 | ((c >> 6) & 0x3F));
+			s[2] = (BYTE)(0x80 | (c & 0x3F));
+			btw = 3;
+		}
+	}
+#else				/* Write the character without conversion */
+	s[0] = (BYTE)c;
+	btw = 1;
+#endif
+	f_write(fp, s, btw, &bw);		/* Write the char to the file */
+	return (bw == btw) ? 1 : EOF;	/* Return the result */
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Put a string to the file                                              */
+/*-----------------------------------------------------------------------*/
+
+int f_puts (
+	const TCHAR* str,	/* Pointer to the string to be output */
+	FIL* fp				/* Pointer to the file object */
+)
+{
+	int n;
+
+
+	for (n = 0; *str; str++, n++) {
+		if (f_putc(*str, fp) == EOF) return EOF;
+	}
+	return n;
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Put a formatted string to the file                                    */
+/*-----------------------------------------------------------------------*/
+
+int f_printf (
+	FIL* fp,			/* Pointer to the file object */
+	const TCHAR* str,	/* Pointer to the format string */
+	...					/* Optional arguments... */
+)
+{
+	va_list arp;
+	BYTE f, r;
+	UINT i, j, w;
+	ULONG v;
+	TCHAR c, d, s[16], *p;
+	int res, chc, cc;
+
+
+	va_start(arp, str);
+
+	for (cc = res = 0; cc != EOF; res += cc) {
+		c = *str++;
+		if (c == 0) break;			/* End of string */
+		if (c != '%') {				/* Non escape character */
+			cc = f_putc(c, fp);
+			if (cc != EOF) cc = 1;
+			continue;
+		}
+		w = f = 0;
+		c = *str++;
+		if (c == '0') {				/* Flag: '0' padding */
+			f = 1; c = *str++;
+		} else {
+			if (c == '-') {			/* Flag: left justified */
+				f = 2; c = *str++;
+			}
+		}
+		while (IsDigit(c)) {		/* Precision */
+			w = w * 10 + c - '0';
+			c = *str++;
+		}
+		if (c == 'l' || c == 'L') {	/* Prefix: Size is long int */
+			f |= 4; c = *str++;
+		}
+		if (!c) break;
+		d = c;
+		if (IsLower(d)) d -= 0x20;
+		switch (d) {				/* Type is... */
+		case 'S' :					/* String */
+			p = va_arg(arp, TCHAR*);
+			for (j = 0; p[j]; j++) ;
+			chc = 0;
+			if (!(f & 2)) {
+				while (j++ < w) chc += (cc = f_putc(' ', fp));
+			}
+			chc += (cc = f_puts(p, fp));
+			while (j++ < w) chc += (cc = f_putc(' ', fp));
+			if (cc != EOF) cc = chc;
+			continue;
+		case 'C' :					/* Character */
+			cc = f_putc((TCHAR)va_arg(arp, int), fp); continue;
+		case 'B' :					/* Binary */
+			r = 2; break;
+		case 'O' :					/* Octal */
+			r = 8; break;
+		case 'D' :					/* Signed decimal */
+		case 'U' :					/* Unsigned decimal */
+			r = 10; break;
+		case 'X' :					/* Hexdecimal */
+			r = 16; break;
+		default:					/* Unknown type (pass-through) */
+			cc = f_putc(c, fp); continue;
+		}
+
+		/* Get an argument and put it in numeral */
+		v = (f & 4) ? (ULONG)va_arg(arp, long) : ((d == 'D') ? (ULONG)(long)va_arg(arp, int) : (ULONG)va_arg(arp, unsigned int));
+		if (d == 'D' && (v & 0x80000000)) {
+			v = 0 - v;
+			f |= 8;
+		}
+		i = 0;
+		do {
+			d = (TCHAR)(v % r); v /= r;
+			if (d > 9) d += (c == 'x') ? 0x27 : 0x07;
+			s[i++] = d + '0';
+		} while (v && i < sizeof s / sizeof s[0]);
+		if (f & 8) s[i++] = '-';
+		j = i; d = (f & 1) ? '0' : ' ';
+		chc = 0;
+		while (!(f & 2) && j++ < w) chc += (cc = f_putc(d, fp));
+		do chc += (cc = f_putc(s[--i], fp)); while(i);
+		while (j++ < w) chc += (cc = f_putc(' ', fp));
+		if (cc != EOF) cc = chc;
+	}
+
+	va_end(arp);
+	return (cc == EOF) ? cc : res;
+}
+
+#endif /* !_FS_READONLY */
+#endif /* _USE_STRFUNC */
diff --git a/ff.h b/ff.h
new file mode 100644
index 0000000..eb60ebf
--- /dev/null
+++ b/ff.h
@@ -0,0 +1,340 @@
+/*---------------------------------------------------------------------------/
+/  FatFs - FAT file system module include file  R0.09b    (C)ChaN, 2013
+/----------------------------------------------------------------------------/
+/ FatFs module is a generic FAT file system module for small embedded systems.
+/ This is a free software that opened for education, research and commercial
+/ developments under license policy of following terms.
+/
+/  Copyright (C) 2013, ChaN, all right reserved.
+/
+/ * The FatFs module is a free software and there is NO WARRANTY.
+/ * No restriction on use. You can use, modify and redistribute it for
+/   personal, non-profit or commercial product UNDER YOUR RESPONSIBILITY.
+/ * Redistributions of source code must retain the above copyright notice.
+/
+/----------------------------------------------------------------------------*/
+
+#ifndef _FATFS
+#define _FATFS	82786	/* Revision ID */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "integer.h"	/* Basic integer types */
+#include "ffconf.h"		/* FatFs configuration options */
+
+#if _FATFS != _FFCONF
+#error Wrong configuration file (ffconf.h).
+#endif
+
+
+
+/* Definitions of volume management */
+
+#if _MULTI_PARTITION		/* Multiple partition configuration */
+typedef struct {
+	BYTE pd;	/* Physical drive number */
+	BYTE pt;	/* Partition: 0:Auto detect, 1-4:Forced partition) */
+} PARTITION;
+extern PARTITION VolToPart[];	/* Volume - Partition resolution table */
+#define LD2PD(vol) (VolToPart[vol].pd)	/* Get physical drive number */
+#define LD2PT(vol) (VolToPart[vol].pt)	/* Get partition index */
+
+#else							/* Single partition configuration */
+#define LD2PD(vol) (BYTE)(vol)	/* Each logical drive is bound to the same physical drive number */
+#define LD2PT(vol) 0			/* Always mounts the 1st partition or in SFD */
+
+#endif
+
+
+
+/* Type of path name strings on FatFs API */
+
+#if _LFN_UNICODE			/* Unicode string */
+#if !_USE_LFN
+#error _LFN_UNICODE must be 0 in non-LFN cfg.
+#endif
+#ifndef _INC_TCHAR
+typedef WCHAR TCHAR;
+#define _T(x) L ## x
+#define _TEXT(x) L ## x
+#endif
+
+#else						/* ANSI/OEM string */
+#ifndef _INC_TCHAR
+typedef char TCHAR;
+#define _T(x) x
+#define _TEXT(x) x
+#endif
+
+#endif
+
+
+
+/* File system object structure (FATFS) */
+
+typedef struct {
+	BYTE	fs_type;		/* FAT sub-type (0:Not mounted) */
+	BYTE	drv;			/* Physical drive number */
+	BYTE	csize;			/* Sectors per cluster (1,2,4...128) */
+	BYTE	n_fats;			/* Number of FAT copies (1,2) */
+	BYTE	wflag;			/* win[] dirty flag (1:must be written back) */
+	BYTE	fsi_flag;		/* fsinfo dirty flag (1:must be written back) */
+	WORD	id;				/* File system mount ID */
+	WORD	n_rootdir;		/* Number of root directory entries (FAT12/16) */
+#if _MAX_SS != 512
+	WORD	ssize;			/* Bytes per sector (512, 1024, 2048 or 4096) */
+#endif
+#if _FS_REENTRANT
+	_SYNC_t	sobj;			/* Identifier of sync object */
+#endif
+#if !_FS_READONLY
+	DWORD	last_clust;		/* Last allocated cluster */
+	DWORD	free_clust;		/* Number of free clusters */
+	DWORD	fsi_sector;		/* fsinfo sector (FAT32) */
+#endif
+#if _FS_RPATH
+	DWORD	cdir;			/* Current directory start cluster (0:root) */
+#endif
+	DWORD	n_fatent;		/* Number of FAT entries (= number of clusters + 2) */
+	DWORD	fsize;			/* Sectors per FAT */
+	DWORD	volbase;		/* Volume start sector */
+	DWORD	fatbase;		/* FAT start sector */
+	DWORD	dirbase;		/* Root directory start sector (FAT32:Cluster#) */
+	DWORD	database;		/* Data start sector */
+	DWORD	winsect;		/* Current sector appearing in the win[] */
+	BYTE	win[_MAX_SS];	/* Disk access window for Directory, FAT (and Data on tiny cfg) */
+} FATFS;
+
+
+
+/* File object structure (FIL) */
+
+typedef struct {
+	FATFS*	fs;				/* Pointer to the related file system object (**do not change order**) */
+	WORD	id;				/* Owner file system mount ID (**do not change order**) */
+	BYTE	flag;			/* File status flags */
+	BYTE	pad1;
+	DWORD	fptr;			/* File read/write pointer (0ed on file open) */
+	DWORD	fsize;			/* File size */
+	DWORD	sclust;			/* File data start cluster (0:no data cluster, always 0 when fsize is 0) */
+	DWORD	clust;			/* Current cluster of fpter */
+	DWORD	dsect;			/* Current data sector of fpter */
+#if !_FS_READONLY
+	DWORD	dir_sect;		/* Sector containing the directory entry */
+	BYTE*	dir_ptr;		/* Pointer to the directory entry in the window */
+#endif
+#if _USE_FASTSEEK
+	DWORD*	cltbl;			/* Pointer to the cluster link map table (null on file open) */
+#endif
+#if _FS_LOCK
+	UINT	lockid;			/* File lock ID (index of file semaphore table Files[]) */
+#endif
+#if !_FS_TINY
+	BYTE	buf[_MAX_SS];	/* File data read/write buffer */
+#endif
+} FIL;
+
+
+
+/* Directory object structure (DIR) */
+
+typedef struct {
+	FATFS*	fs;				/* Pointer to the owner file system object (**do not change order**) */
+	WORD	id;				/* Owner file system mount ID (**do not change order**) */
+	WORD	index;			/* Current read/write index number */
+	DWORD	sclust;			/* Table start cluster (0:Root dir) */
+	DWORD	clust;			/* Current cluster */
+	DWORD	sect;			/* Current sector */
+	BYTE*	dir;			/* Pointer to the current SFN entry in the win[] */
+	BYTE*	fn;				/* Pointer to the SFN (in/out) {file[8],ext[3],status[1]} */
+#if _USE_LFN
+	WCHAR*	lfn;			/* Pointer to the LFN working buffer */
+	WORD	lfn_idx;		/* Last matched LFN index number (0xFFFF:No LFN) */
+#endif
+} DIR;
+
+
+
+/* File status structure (FILINFO) */
+
+typedef struct {
+	DWORD	fsize;			/* File size */
+	WORD	fdate;			/* Last modified date */
+	WORD	ftime;			/* Last modified time */
+	BYTE	fattrib;		/* Attribute */
+	TCHAR	fname[13];		/* Short file name (8.3 format) */
+#if _USE_LFN
+	TCHAR*	lfname;			/* Pointer to the LFN buffer */
+	UINT 	lfsize;			/* Size of LFN buffer in TCHAR */
+#endif
+} FILINFO;
+
+
+
+/* File function return code (FRESULT) */
+
+typedef enum {
+	FR_OK = 0,				/* (0) Succeeded */
+	FR_DISK_ERR,			/* (1) A hard error occurred in the low level disk I/O layer */
+	FR_INT_ERR,				/* (2) Assertion failed */
+	FR_NOT_READY,			/* (3) The physical drive cannot work */
+	FR_NO_FILE,				/* (4) Could not find the file */
+	FR_NO_PATH,				/* (5) Could not find the path */
+	FR_INVALID_NAME,		/* (6) The path name format is invalid */
+	FR_DENIED,				/* (7) Access denied due to prohibited access or directory full */
+	FR_EXIST,				/* (8) Access denied due to prohibited access */
+	FR_INVALID_OBJECT,		/* (9) The file/directory object is invalid */
+	FR_WRITE_PROTECTED,		/* (10) The physical drive is write protected */
+	FR_INVALID_DRIVE,		/* (11) The logical drive number is invalid */
+	FR_NOT_ENABLED,			/* (12) The volume has no work area */
+	FR_NO_FILESYSTEM,		/* (13) There is no valid FAT volume */
+	FR_MKFS_ABORTED,		/* (14) The f_mkfs() aborted due to any parameter error */
+	FR_TIMEOUT,				/* (15) Could not get a grant to access the volume within defined period */
+	FR_LOCKED,				/* (16) The operation is rejected according to the file sharing policy */
+	FR_NOT_ENOUGH_CORE,		/* (17) LFN working buffer could not be allocated */
+	FR_TOO_MANY_OPEN_FILES,	/* (18) Number of open files > _FS_SHARE */
+	FR_INVALID_PARAMETER	/* (19) Given parameter is invalid */
+} FRESULT;
+
+
+
+/*--------------------------------------------------------------*/
+/* FatFs module application interface                           */
+
+FRESULT f_mount (BYTE vol, FATFS* fs);								/* Mount/Unmount a logical drive */
+FRESULT f_open (FIL* fp, const TCHAR* path, BYTE mode);				/* Open or create a file */
+FRESULT f_read (FIL* fp, void* buff, UINT btr, UINT* br);			/* Read data from a file */
+FRESULT f_lseek (FIL* fp, DWORD ofs);								/* Move file pointer of a file object */
+FRESULT f_close (FIL* fp);											/* Close an open file object */
+FRESULT f_opendir (DIR* dj, const TCHAR* path);						/* Open an existing directory */
+FRESULT f_readdir (DIR* dj, FILINFO* fno);							/* Read a directory item */
+FRESULT f_stat (const TCHAR* path, FILINFO* fno);					/* Get file status */
+FRESULT f_write (FIL* fp, const void* buff, UINT btw, UINT* bw);	/* Write data to a file */
+FRESULT f_getfree (const TCHAR* path, DWORD* nclst, FATFS** fatfs);	/* Get number of free clusters on the drive */
+FRESULT f_truncate (FIL* fp);										/* Truncate file */
+FRESULT f_sync (FIL* fp);											/* Flush cached data of a writing file */
+FRESULT f_unlink (const TCHAR* path);								/* Delete an existing file or directory */
+FRESULT	f_mkdir (const TCHAR* path);								/* Create a new directory */
+FRESULT f_chmod (const TCHAR* path, BYTE value, BYTE mask);			/* Change attribute of the file/dir */
+FRESULT f_utime (const TCHAR* path, const FILINFO* fno);			/* Change times-tamp of the file/dir */
+FRESULT f_rename (const TCHAR* path_old, const TCHAR* path_new);	/* Rename/Move a file or directory */
+FRESULT f_chdrive (BYTE drv);										/* Change current drive */
+FRESULT f_chdir (const TCHAR* path);								/* Change current directory */
+FRESULT f_getcwd (TCHAR* buff, UINT len);							/* Get current directory */
+FRESULT	f_getlabel (const TCHAR* path, TCHAR* label, DWORD* sn);	/* Get volume label */
+FRESULT	f_setlabel (const TCHAR* label);							/* Set volume label */
+FRESULT f_forward (FIL* fp, UINT(*func)(const BYTE*,UINT), UINT btf, UINT* bf);	/* Forward data to the stream */
+FRESULT f_mkfs (BYTE vol, BYTE sfd, UINT au);						/* Create a file system on the drive */
+FRESULT	f_fdisk (BYTE pdrv, const DWORD szt[], void* work);			/* Divide a physical drive into some partitions */
+int f_putc (TCHAR c, FIL* fp);										/* Put a character to the file */
+int f_puts (const TCHAR* str, FIL* cp);								/* Put a string to the file */
+int f_printf (FIL* fp, const TCHAR* str, ...);						/* Put a formatted string to the file */
+TCHAR* f_gets (TCHAR* buff, int len, FIL* fp);						/* Get a string from the file */
+
+#define f_eof(fp) (((fp)->fptr == (fp)->fsize) ? 1 : 0)
+#define f_error(fp) (((fp)->flag & FA__ERROR) ? 1 : 0)
+#define f_tell(fp) ((fp)->fptr)
+#define f_size(fp) ((fp)->fsize)
+
+#ifndef EOF
+#define EOF (-1)
+#endif
+
+
+
+
+/*--------------------------------------------------------------*/
+/* Additional user defined functions                            */
+
+/* RTC function */
+#if !_FS_READONLY
+DWORD get_fattime (void);
+#endif
+
+/* Unicode support functions */
+#if _USE_LFN							/* Unicode - OEM code conversion */
+WCHAR ff_convert (WCHAR chr, UINT dir);	/* OEM-Unicode bidirectional conversion */
+WCHAR ff_wtoupper (WCHAR chr);			/* Unicode upper-case conversion */
+#if _USE_LFN == 3						/* Memory functions */
+void* ff_memalloc (UINT msize);			/* Allocate memory block */
+void ff_memfree (void* mblock);			/* Free memory block */
+#endif
+#endif
+
+/* Sync functions */
+#if _FS_REENTRANT
+int ff_cre_syncobj (BYTE vol, _SYNC_t* sobj);	/* Create a sync object */
+int ff_req_grant (_SYNC_t sobj);				/* Lock sync object */
+void ff_rel_grant (_SYNC_t sobj);				/* Unlock sync object */
+int ff_del_syncobj (_SYNC_t sobj);				/* Delete a sync object */
+#endif
+
+
+
+
+/*--------------------------------------------------------------*/
+/* Flags and offset address                                     */
+
+
+/* File access control and file status flags (FIL.flag) */
+
+#define	FA_READ				0x01
+#define	FA_OPEN_EXISTING	0x00
+#define FA__ERROR			0x80
+
+#if !_FS_READONLY
+#define	FA_WRITE			0x02
+#define	FA_CREATE_NEW		0x04
+#define	FA_CREATE_ALWAYS	0x08
+#define	FA_OPEN_ALWAYS		0x10
+#define FA__WRITTEN			0x20
+#define FA__DIRTY			0x40
+#endif
+
+
+/* FAT sub type (FATFS.fs_type) */
+
+#define FS_FAT12	1
+#define FS_FAT16	2
+#define FS_FAT32	3
+
+
+/* File attribute bits for directory entry */
+
+#define	AM_RDO	0x01	/* Read only */
+#define	AM_HID	0x02	/* Hidden */
+#define	AM_SYS	0x04	/* System */
+#define	AM_VOL	0x08	/* Volume label */
+#define AM_LFN	0x0F	/* LFN entry */
+#define AM_DIR	0x10	/* Directory */
+#define AM_ARC	0x20	/* Archive */
+#define AM_MASK	0x3F	/* Mask of defined bits */
+
+
+/* Fast seek feature */
+#define CREATE_LINKMAP	0xFFFFFFFF
+
+
+
+/*--------------------------------*/
+/* Multi-byte word access macros  */
+
+#if _WORD_ACCESS == 1	/* Enable word access to the FAT structure */
+#define	LD_WORD(ptr)		(WORD)(*(WORD*)(BYTE*)(ptr))
+#define	LD_DWORD(ptr)		(DWORD)(*(DWORD*)(BYTE*)(ptr))
+#define	ST_WORD(ptr,val)	*(WORD*)(BYTE*)(ptr)=(WORD)(val)
+#define	ST_DWORD(ptr,val)	*(DWORD*)(BYTE*)(ptr)=(DWORD)(val)
+#else					/* Use byte-by-byte access to the FAT structure */
+#define	LD_WORD(ptr)		(WORD)(((WORD)*((BYTE*)(ptr)+1)<<8)|(WORD)*(BYTE*)(ptr))
+#define	LD_DWORD(ptr)		(DWORD)(((DWORD)*((BYTE*)(ptr)+3)<<24)|((DWORD)*((BYTE*)(ptr)+2)<<16)|((WORD)*((BYTE*)(ptr)+1)<<8)|*(BYTE*)(ptr))
+#define	ST_WORD(ptr,val)	*(BYTE*)(ptr)=(BYTE)(val); *((BYTE*)(ptr)+1)=(BYTE)((WORD)(val)>>8)
+#define	ST_DWORD(ptr,val)	*(BYTE*)(ptr)=(BYTE)(val); *((BYTE*)(ptr)+1)=(BYTE)((WORD)(val)>>8); *((BYTE*)(ptr)+2)=(BYTE)((DWORD)(val)>>16); *((BYTE*)(ptr)+3)=(BYTE)((DWORD)(val)>>24)
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _FATFS */
diff --git a/ffconf.h b/ffconf.h
new file mode 100644
index 0000000..59d37b3
--- /dev/null
+++ b/ffconf.h
@@ -0,0 +1,192 @@
+/*---------------------------------------------------------------------------/
+/  FatFs - FAT file system module configuration file  R0.09b (C)ChaN, 2013
+/----------------------------------------------------------------------------/
+/
+/ CAUTION! Do not forget to make clean the project after any changes to
+/ the configuration options.
+/
+/----------------------------------------------------------------------------*/
+#ifndef _FFCONF
+#define _FFCONF 82786	/* Revision ID */
+
+
+/*---------------------------------------------------------------------------/
+/ Functions and Buffer Configurations
+/----------------------------------------------------------------------------*/
+
+#define	_FS_TINY		0	/* 0:Normal or 1:Tiny */
+/* When _FS_TINY is set to 1, FatFs uses the sector buffer in the file system
+/  object instead of the sector buffer in the individual file object for file
+/  data transfer. This reduces memory consumption 512 bytes each file object. */
+
+
+#define _FS_READONLY	0	/* 0:Read/Write or 1:Read only */
+/* Setting _FS_READONLY to 1 defines read only configuration. This removes
+/  writing functions, f_write, f_sync, f_unlink, f_mkdir, f_chmod, f_rename,
+/  f_truncate and useless f_getfree. */
+
+
+#define _FS_MINIMIZE	1	/* 0 to 3 */
+/* The _FS_MINIMIZE option defines minimization level to remove some functions.
+/
+/   0: Full function.
+/   1: f_stat, f_getfree, f_unlink, f_mkdir, f_chmod, f_truncate and f_rename
+/      are removed.
+/   2: f_opendir and f_readdir are removed in addition to 1.
+/   3: f_lseek is removed in addition to 2. */
+
+
+#define	_USE_STRFUNC	0	/* 0:Disable or 1-2:Enable */
+/* To enable string functions, set _USE_STRFUNC to 1 or 2. */
+
+
+#define	_USE_MKFS		0	/* 0:Disable or 1:Enable */
+/* To enable f_mkfs function, set _USE_MKFS to 1 and set _FS_READONLY to 0 */
+
+
+#define	_USE_FASTSEEK	0	/* 0:Disable or 1:Enable */
+/* To enable fast seek feature, set _USE_FASTSEEK to 1. */
+
+
+#define _USE_LABEL		0	/* 0:Disable or 1:Enable */
+/* To enable volume label functions, set _USE_LAVEL to 1 */
+
+
+#define	_USE_FORWARD	0	/* 0:Disable or 1:Enable */
+/* To enable f_forward function, set _USE_FORWARD to 1 and set _FS_TINY to 1. */
+
+
+/*---------------------------------------------------------------------------/
+/ Locale and Namespace Configurations
+/----------------------------------------------------------------------------*/
+
+#define _CODE_PAGE	866
+/* The _CODE_PAGE specifies the OEM code page to be used on the target system.
+/  Incorrect setting of the code page can cause a file open failure.
+/
+/   932  - Japanese Shift-JIS (DBCS, OEM, Windows)
+/   936  - Simplified Chinese GBK (DBCS, OEM, Windows)
+/   949  - Korean (DBCS, OEM, Windows)
+/   950  - Traditional Chinese Big5 (DBCS, OEM, Windows)
+/   1250 - Central Europe (Windows)
+/   1251 - Cyrillic (Windows)
+/   1252 - Latin 1 (Windows)
+/   1253 - Greek (Windows)
+/   1254 - Turkish (Windows)
+/   1255 - Hebrew (Windows)
+/   1256 - Arabic (Windows)
+/   1257 - Baltic (Windows)
+/   1258 - Vietnam (OEM, Windows)
+/   437  - U.S. (OEM)
+/   720  - Arabic (OEM)
+/   737  - Greek (OEM)
+/   775  - Baltic (OEM)
+/   850  - Multilingual Latin 1 (OEM)
+/   858  - Multilingual Latin 1 + Euro (OEM)
+/   852  - Latin 2 (OEM)
+/   855  - Cyrillic (OEM)
+/   866  - Russian (OEM)
+/   857  - Turkish (OEM)
+/   862  - Hebrew (OEM)
+/   874  - Thai (OEM, Windows)
+/	1    - ASCII only (Valid for non LFN cfg.)
+*/
+
+
+#define	_USE_LFN	0		/* 0 to 3 */
+#define	_MAX_LFN	255		/* Maximum LFN length to handle (12 to 255) */
+/* The _USE_LFN option switches the LFN support.
+/
+/   0: Disable LFN feature. _MAX_LFN and _LFN_UNICODE have no effect.
+/   1: Enable LFN with static working buffer on the BSS. Always NOT reentrant.
+/   2: Enable LFN with dynamic working buffer on the STACK.
+/   3: Enable LFN with dynamic working buffer on the HEAP.
+/
+/  The LFN working buffer occupies (_MAX_LFN + 1) * 2 bytes. To enable LFN,
+/  Unicode handling functions ff_convert() and ff_wtoupper() must be added
+/  to the project. When enable to use heap, memory control functions
+/  ff_memalloc() and ff_memfree() must be added to the project. */
+
+
+#define	_LFN_UNICODE	0	/* 0:ANSI/OEM or 1:Unicode */
+/* To switch the character code set on FatFs API to Unicode,
+/  enable LFN feature and set _LFN_UNICODE to 1. */
+
+
+#define _FS_RPATH		0	/* 0 to 2 */
+/* The _FS_RPATH option configures relative path feature.
+/
+/   0: Disable relative path feature and remove related functions.
+/   1: Enable relative path. f_chdrive() and f_chdir() are available.
+/   2: f_getcwd() is available in addition to 1.
+/
+/  Note that output of the f_readdir fnction is affected by this option. */
+
+
+/*---------------------------------------------------------------------------/
+/ Physical Drive Configurations
+/----------------------------------------------------------------------------*/
+
+#define _VOLUMES	1
+/* Number of volumes (logical drives) to be used. */
+
+
+#define	_MAX_SS		512		/* 512, 1024, 2048 or 4096 */
+/* Maximum sector size to be handled.
+/  Always set 512 for memory card and hard disk but a larger value may be
+/  required for on-board flash memory, floppy disk and optical disk.
+/  When _MAX_SS is larger than 512, it configures FatFs to variable sector size
+/  and GET_SECTOR_SIZE command must be implememted to the disk_ioctl function. */
+
+
+#define	_MULTI_PARTITION	0	/* 0:Single partition, 1:Enable multiple partition */
+/* When set to 0, each volume is bound to the same physical drive number and
+/ it can mount only first primaly partition. When it is set to 1, each volume
+/ is tied to the partitions listed in VolToPart[]. */
+
+
+#define	_USE_ERASE	0	/* 0:Disable or 1:Enable */
+/* To enable sector erase feature, set _USE_ERASE to 1. CTRL_ERASE_SECTOR command
+/  should be added to the disk_ioctl functio. */
+
+
+
+/*---------------------------------------------------------------------------/
+/ System Configurations
+/----------------------------------------------------------------------------*/
+
+#define _WORD_ACCESS	0	/* 0 or 1 */
+/* Set 0 first and it is always compatible with all platforms. The _WORD_ACCESS
+/  option defines which access method is used to the word data on the FAT volume.
+/
+/   0: Byte-by-byte access.
+/   1: Word access. Do not choose this unless following condition is met.
+/
+/  When the byte order on the memory is big-endian or address miss-aligned word
+/  access results incorrect behavior, the _WORD_ACCESS must be set to 0.
+/  If it is not the case, the value can also be set to 1 to improve the
+/  performance and code size.
+*/
+
+
+/* A header file that defines sync object types on the O/S, such as
+/  windows.h, ucos_ii.h and semphr.h, must be included prior to ff.h. */
+
+#define _FS_REENTRANT	0		/* 0:Disable or 1:Enable */
+#define _FS_TIMEOUT		1000	/* Timeout period in unit of time ticks */
+#define	_SYNC_t			HANDLE	/* O/S dependent type of sync object. e.g. HANDLE, OS_EVENT*, ID and etc.. */
+
+/* The _FS_REENTRANT option switches the reentrancy (thread safe) of the FatFs module.
+/
+/   0: Disable reentrancy. _SYNC_t and _FS_TIMEOUT have no effect.
+/   1: Enable reentrancy. Also user provided synchronization handlers,
+/      ff_req_grant, ff_rel_grant, ff_del_syncobj and ff_cre_syncobj
+/      function must be added to the project. */
+
+
+#define	_FS_LOCK	0	/* 0:Disable or >=1:Enable */
+/* To enable file lock control feature, set _FS_LOCK to 1 or greater.
+   The value defines how many files can be opened simultaneously. */
+
+
+#endif /* _FFCONFIG */
diff --git a/integer.h b/integer.h
new file mode 100644
index 0000000..16ad408
--- /dev/null
+++ b/integer.h
@@ -0,0 +1,37 @@
+/*-------------------------------------------*/
+/* Integer type definitions for FatFs module */
+/*-------------------------------------------*/
+
+#ifndef _INTEGER
+#define _INTEGER
+
+#ifdef _WIN32	/* FatFs development platform */
+
+#include <windows.h>
+#include <tchar.h>
+
+#else			/* Embedded platform */
+
+/* These types must be 16-bit, 32-bit or larger integer */
+typedef int				INT;
+typedef unsigned int	UINT;
+
+/* These types must be 8-bit integer */
+typedef char			CHAR;
+typedef unsigned char	UCHAR;
+typedef unsigned char	BYTE;
+
+/* These types must be 16-bit integer */
+typedef short			SHORT;
+typedef unsigned short	USHORT;
+typedef unsigned short	WORD;
+typedef unsigned short	WCHAR;
+
+/* These types must be 32-bit integer */
+typedef long			LONG;
+typedef unsigned long	ULONG;
+typedef unsigned long	DWORD;
+
+#endif
+
+#endif
diff --git a/intercom.c b/intercom.c
new file mode 100644
index 0000000..9204e26
--- /dev/null
+++ b/intercom.c
@@ -0,0 +1,392 @@
+#include "defines.h"
+#include <stdio.h>
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include <util/delay.h>
+#include <avr/eeprom.h>
+#include <avr/pgmspace.h>
+#include "clunet.h"
+#include "ff.h"
+#include "diskio.h"
+#include "sound.h"
+#include "rtc.h"
+#include "transfer.h"
+
+
+volatile unsigned char mode_current = 1; // Òåêóùèé ðåæèì
+volatile unsigned char mode_temp = 0;    // Ðåæèì íà îäèí ðàç
+volatile unsigned long int record_num = 0;
+char buffer[32];
+
+char STARTED_WAV[] PROGMEM = "/system/started.wav";
+char AUTOLONG_WAV[] PROGMEM = "/system/automid.wav";
+char AUTOFAST_WAV[] PROGMEM = "/system/autofast.wav";
+char SAVED_WAV[] PROGMEM = "/system/saved.wav";
+char OPENME_WAV[] PROGMEM = "/system/openme.wav";
+char OPEN_WAV[] PROGMEM = "/system/open.wav";
+char WAITLONG_WAV[] PROGMEM = "/system/waitlong.wav";
+char EMERGENCY_OPEN_WAV[] PROGMEM = "/system/emeropen.wav";
+char MODE_WAV[] PROGMEM = "/system/mode.wav";
+char MODETEMP_WAV[] PROGMEM = "/system/modetemp.wav";
+char MAINMENU_WAV[] PROGMEM = "/system/mainmenu.wav";
+char MODELIST_WAV[] PROGMEM = "/system/modelist.wav";
+char MODE0_WAV[] PROGMEM = "/system/mode0.wav";
+char MODE1_WAV[] PROGMEM = "/system/mode1.wav";
+char MODE2_WAV[] PROGMEM = "/system/mode2.wav";
+char MODE3_WAV[] PROGMEM = "/system/mode3.wav";
+char MODE4_WAV[] PROGMEM = "/system/mode4.wav";
+char MODE5_WAV[] PROGMEM = "/system/mode5.wav";
+char MODE9_WAV[] PROGMEM = "/system/zdrasti.wav";
+char MODEX_WAV[] PROGMEM = "/system/modex.wav";
+
+void send_current_mode(unsigned char dest)
+{
+	buffer[0] = mode_current;
+	buffer[1] = mode_temp;
+	clunet_send(dest, CLUNET_PRIORITY_INFO, CLUNET_COMMAND_INTERCOM_MODE_INFO, (char*)&buffer, 2); // Îòïðàâëÿåì â ñåòü òåêóùèé ðåæèì
+}
+
+void save_mode()
+{
+	eeprom_write_byte((void*)4, mode_current); // Ðåæèì 
+	eeprom_write_byte((void*)5, mode_temp); // Âðåìåííûé ðåæèì
+	send_current_mode(CLUNET_BROADCAST_ADDRESS);
+}
+
+void data_received(unsigned char src_address, unsigned char dst_address, unsigned char command, char* data, unsigned char size)
+{
+	if (command == CLUNET_COMMAND_TIME && size >= 6) // Ñèíõðîíèçàöèÿ âðåìåíè
+	{
+		set_time(data[3]+2000, data[4], data[5], data[0],data[1],data[2]);
+	}
+	else if (command == CLUNET_COMMAND_INTERCOM_MODE_REQUEST) // Ó íàñ çàïðàøèâàþò ðåæèì
+	{
+		send_current_mode(src_address);
+	}
+	else if (command == CLUNET_COMMAND_INTERCOM_MODE_SET) // Óñòàíîâêà ðåæèìà
+	{
+		if (size >= 1 && (unsigned char)data[0] != 0xFF) mode_current = data[0];
+		if (size >= 2 && (unsigned char)data[1] != 0xFF) mode_temp = data[1];
+		save_mode();
+	}	
+	else if (command == CLUNET_COMMAND_INTERCOM_RECORD_REQUEST) // Ïåðåäà÷à çàïèñåé
+	{
+		if (size == 4) transfer_start(*((unsigned long int*)data), src_address); // Íà÷èíàåì ïåðåäà÷ó
+		else if (size == 1 && data[0] == 1) transfer_ack(); // Ïîäòâåðæàþò ïðè¸ì, ïåðåõîäèì ê ñëåäóþùåìó êóñêó
+		else if (size == 1 && data[0] == 0) transfer_stop(); // Ïðåêðàùåíèå ïåðåäà÷è äàííûõ
+	}
+}
+
+int is_LINE_POWER() // Îïðåäåëÿåò, ÷òî åñòü ñòàáèëüíûé ñèãíàë â ëèíèè
+{
+	int i;	
+	for (i = 0; i < 10; i++)
+	{
+		if (!LINE_POWER) return 0;
+		_delay_ms(10);
+	}
+	return 1;
+}
+
+void intercom_bell() // Èçäà¸ò çâóê âõîäÿùåãî çâîíêà
+{
+	int t;
+	for (t = 0; t < 9; t++)
+	{
+		if (t % 3 == 0)
+			_delay_ms(200);
+		beep(3000, 30);
+		beep(2000, 20);
+		beep(1000, 10);
+	}
+}
+
+int answer_play(char* filename) // Îòâå÷àåò è âîñïðîèçâîäèò ôàéë
+{
+	ANSWER;
+	MODE_MYSOUND;
+	_delay_ms(1000);
+	if (play_wav_pgm(filename) == 0)
+	{
+		while (sound_read() >= 0)
+		{
+			if (!LINE_POWER || OFFHOOK) // Ñíÿëè òðóáêó, èëè ñèãíàë èñ÷åç
+			{
+				sound_stop();
+				return 1;
+			}
+		}
+		sound_stop();
+	}
+	return 0;
+}
+
+int answer_play_open(char* filename) // Îòâå÷àåò, âîñïðîèçâîäèò ôàéë è îòêðûâàåò äâåðü
+{
+	if (answer_play(filename)) return 1; // Ñíÿëè òðóáêó, èëè ñèãíàë èñ÷åç
+	OPEN;
+	return 0;
+}
+
+
+int answer_record(char* filename1, char* filename2) // Îòâå÷àåò, çàïèñûâàåò ñîîáùåíèå,
+{
+	if (answer_play(filename1)) return 1; // Îòâå÷àåì, ïðåäëàãàåì îñòàâèòü ñîîáùåíèå
+	beep(3000, 500);	// Áèèï
+	sprintf(buffer, "/%08lu.wav", record_num); // Ôîðìèðóåì èìÿ ôàéëà
+	clunet_send(CLUNET_BROADCAST_ADDRESS, CLUNET_PRIORITY_INFO, CLUNET_COMMAND_INTERCOM_MESSAGE, (char*)&record_num, sizeof(record_num)); // Îòïðàâëÿåì â ñåòü ñîîáùåíèå
+	record_num++;
+	eeprom_write_dword((void*)0, record_num); // Çàïîìèíàåì êîë-âî çàïèñåé
+	if (rec_wav(buffer) == 0) // Ïèøåì ñîîáùåíèå
+	{
+		int s = 0;
+		long int totalSize = 0;
+		while (s >= 0 && totalSize < 8000UL*RECORD_MAX_LENGTH)
+		{
+			s = sound_write();
+			totalSize += s;
+			if (!LINE_POWER || OFFHOOK) // Ñíÿëè òðóáêó, èëè ñèãíàë èñ÷åç
+			{
+				sound_stop();
+				return 1;
+			}
+		}
+		sound_stop();
+	}	
+	if (play_wav_pgm(filename2) == 0) // Åñëè ïàöèåíò äîæäàëñÿ, áëàãîäàðèì
+	{
+		while (sound_read() >= 0)
+		{
+			if (!LINE_POWER || OFFHOOK) // Ñíÿëè òðóáêó, èëè ñèãíàë èñ÷åç
+			{
+				sound_stop();
+				return 1;
+			}
+		}
+		sound_stop();
+	}
+	return 0;
+}
+
+void incoming_ring() // Âûïîëíÿåòñÿ ïðè ëþáîì âõîäÿùåì çâîíêå
+{
+	LED_RED_ON;	
+	unsigned char mode = (mode_temp != 0) ? mode_temp : mode_current; // Òåêóùèé ðåæèì
+	// Ñîîáùåíèå î çâîíêå, óêàçûâàåì òåêóùèé ðåæèì
+	clunet_send(CLUNET_BROADCAST_ADDRESS, CLUNET_PRIORITY_INFO, CLUNET_COMMAND_INTERCOM_RING, (char*)&mode, 1);
+	intercom_bell();
+	if (mode_temp) // Îáíóëÿåì âðåìåííûé ðåæèì
+	{
+		mode_temp = 0;
+		save_mode();
+	}
+	if (!LINE_POWER) // Àâàðèéíîå îòêðòèå äâåðè, åñëè íàáðàëè è ñðàçó ñáðîñèëè
+	{
+		mode_temp = 0xFF; 
+		save_mode();
+	}
+	if (mode)
+	{
+		switch (mode)
+		{
+			case 1: // Àâòîîòâåò÷èê, äîëãî æä¸ò îòâåòà, ïîòîì çàïèñûâàåò
+				answer_record(AUTOLONG_WAV, SAVED_WAV);
+				break;
+			case 2: // Àâòîîòâåò÷èê, ñðàçó çàïèñûâàåò
+				answer_record(AUTOFAST_WAV, SAVED_WAV);
+				break;
+			case 3: // Ïðèâåòñòâóåò õîçÿèíà, îòêðûâàåò äâåðü
+				answer_play_open(OPENME_WAV);
+				break;
+			case 4: // Ïðèâåòñòâóåò ãîñòÿ, îòêðûâàåò äâåðü
+				answer_play_open(OPEN_WAV);
+				break;
+			case 5: // Äîëãî æä¸ò îòâåòà. Ñîîáùåíèå íå ïèøåò.
+				answer_play(WAITLONG_WAV);
+				break;
+			case 9: // Çäðàñòè, çäðàñòèòå. Ïðîõîäè, áðàòèøêà, ïðîõîäè.
+				answer_play_open(MODE9_WAV);
+				break;				
+			case 0xFF:  // Àâàðèéíîå îòêðòèå äâåðè
+				answer_play_open(EMERGENCY_OPEN_WAV);
+		}
+		MODE_NORMAL;
+		_delay_ms(200); // Íà ñëó÷àé, åñëè êîíòàêòû ñíÿòèÿ òðóáêè íå óñïåëè ðàçîìêíóòüñÿ
+		HANGUP;
+	}
+	while (LINE_POWER); // Æä¸ì ïîêà íå ïðîïàä¸ò ñèãíàë 
+	LED_RED_OFF;
+	while (OFFHOOK); // È ïîëüçîâàòåëü íå ïîëîæèò òðóáêó
+	_delay_ms(100); // Çàùèòà îò äðåáåçãà êîíòàêòîâ
+}
+
+int count_disk() // Ñ÷èòàåò, ÷òî íàáðàëè íà äèñêå
+{
+	int cnt = 1;
+	while (1)
+	{
+		while (CONTROL);
+		_delay_ms(1);
+		int t = 0;
+		while (!CONTROL)
+		{
+			_delay_ms(1);
+			t++;
+			if (t > 200) return cnt;
+		}
+		cnt++;
+	}
+}
+
+void say_mode(char istemp)
+{
+	unsigned char mode = 0;
+	if (!istemp)
+	{
+		mode = mode_current;
+		play_wav_auto_pgm(MODE_WAV);
+	}
+	else 
+	{
+		mode = mode_temp;
+		play_wav_auto_pgm(MODETEMP_WAV);				
+	}
+	switch (mode)
+	{
+		case 0:
+			play_wav_auto_pgm(MODE0_WAV);
+			break;
+		case 1:
+			play_wav_auto_pgm(MODE1_WAV);
+			break;
+		case 2:
+			play_wav_auto_pgm(MODE2_WAV);
+			break;
+		case 3:
+			play_wav_auto_pgm(MODE3_WAV);
+			break;
+		case 4:
+			play_wav_auto_pgm(MODE4_WAV);
+			break;
+		case 5:
+			play_wav_auto_pgm(MODE5_WAV);
+			break;
+		case 9:
+			play_wav_auto_pgm(MODE9_WAV);
+			break;
+		default:
+			play_wav_auto_pgm(MODEX_WAV);
+			break;
+	}
+}
+
+void select_mode(char istemp) // Âûáîò ðåæèìà
+{
+	say_mode(istemp);
+	while (!CONTROL && OFFHOOK) play_wav_auto_pgm(MODELIST_WAV);
+	if (!CONTROL) return;
+	int cnt = count_disk();
+	if (cnt >= 10) cnt = 0;
+	if (!istemp)
+	{
+		mode_current = cnt;
+		say_mode(0);
+	} else {
+		mode_temp = cnt;
+		say_mode(1);
+	}
+	save_mode();
+}
+
+void play_record(long unsigned int num)
+{
+	sprintf(buffer, "/%08lu.wav", num); // Ôîðìèðóåì èìÿ ôàéëà
+	play_wav_auto(buffer);
+}
+
+void control_mode() // Ðåæèì óïðàâëåíèÿ
+{
+	LED_GREEN_ON;
+	while (OFFHOOK)
+	{
+		if (!CONTROL)
+			play_wav_auto_pgm(MAINMENU_WAV);
+		while (!CONTROL && OFFHOOK) play_wav_auto_pgm(MAINMENU_WAV);
+		if (CONTROL)
+		{
+			int cnt = count_disk();
+			switch (cnt)
+			{
+				case 1:
+					select_mode(0);
+					break;
+				case 2:
+					select_mode(1);
+					break;
+				case 10:
+					break;					
+				default:
+					play_record(record_num-(cnt-2));
+					break;
+			}
+		}
+	}
+	LED_GREEN_OFF;
+	_delay_ms(100); // Çàùèòà îò äðåáåçãà êîíòàêòîâ
+}
+
+int main (void)
+{
+	clunet_init();  
+	clunet_set_on_data_received(data_received);	
+	time_init();
+	sei();
+	//eeprom_write_dword((void*)0, 0);
+	record_num = eeprom_read_dword((void*)0); // ×èòàåì êîë-âî çàïèñåé
+	mode_current = eeprom_read_byte((void*)4); // Ðåæèì 
+	mode_temp = eeprom_read_byte((void*)5); // Âðåìåííûé ðåæèì
+
+	disk_initialize(0);	
+
+	unset_bit(DDRA, 3); set_bit(PORTA, 3);	 // Îïðåäåëåíèå ñèãíàëà â ëèíèè	
+	unset_bit(DDRA, 4);	unset_bit(PORTA, 4); // Îòêðûâàëêà äâåðè
+	set_bit(DDRA, 5); HANGUP; // Ðåëå ñíèìàíèÿ òðóáêè
+	set_bit(DDRA, 6); MODE_NORMAL; // Ðåëå âûáîðà ðåæèìà
+	unset_bit(DDRG, 0); set_bit(PORTG, 0); // Îïðåäåëåíèå, ëåæèò ëè òðóáêà	
+	set_bit(DDRD, 6); set_bit(DDRD, 7); // Ñâåòîäèîäû
+	unset_bit(DDRA, 7); set_bit(PORTA, 7); // Ñ÷¸ò÷èê îáîðîòîâ äèñêà
+
+	unset_bit(DDRF, 0); // ADC+
+	unset_bit(PORTF, 0);
+	unset_bit(DDRF, 1); // ADC-
+	unset_bit(PORTF, 1);
+
+	beep(500, 200);
+	beep(1500, 200);
+	beep(3000, 200);
+	_delay_ms(1000);
+	if (play_wav_pgm(STARTED_WAV) == 0)
+	{
+		LED_GREEN_ON;
+		while (sound_read() >= 0) ;
+		LED_GREEN_OFF;
+		sound_stop();
+	} else {
+		LED_RED_ON;
+		beep(3000, 200);
+		beep(1500, 200);
+		beep(500, 200);
+		LED_RED_OFF;
+	}
+	
+	send_current_mode(CLUNET_BROADCAST_ADDRESS);
+
+	while(1)
+	{
+		if (is_LINE_POWER()) incoming_ring();
+		if (OFFHOOK) control_mode();
+		transfer_data(); // Ïåðåäà¸ì äàííûå íà äîñóãå.
+		//play_wav_auto("/00000007.wav");
+	}
+}
+
diff --git a/intercom.lay6 b/intercom.lay6
new file mode 100644
index 0000000..a9ca351
--- /dev/null
+++ b/intercom.lay6
diff --git a/rtc.c b/rtc.c
new file mode 100644
index 0000000..80fdd8a
--- /dev/null
+++ b/rtc.c
@@ -0,0 +1,97 @@
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include "rtc.h"
+#include "bits.h"
+
+volatile char rtc_ok = 0;
+volatile int year;
+volatile int month;
+volatile int mday;
+volatile int hour;
+volatile int min;
+volatile int sec;
+
+DWORD get_fattime(void)
+{
+	if (!rtc_ok) return 0;
+
+	return	  ((DWORD)(year - 1980) << 25)
+			| ((DWORD)month << 21)
+			| ((DWORD)mday << 16)
+			| ((DWORD)hour << 11)
+			| ((DWORD)min << 5)
+			| ((DWORD)sec >> 1);
+}
+
+void set_time(int s_year, int s_month, int s_mday, int s_hour, int s_min, int s_sec)
+{
+	year = s_year;
+	month = s_month;
+	mday = s_mday;
+	hour = s_hour;
+	min = s_min;
+	sec = s_sec;
+	rtc_ok = 1;
+}
+
+void time_init()
+{
+	OCR2 = 0; // Çàïóñêàåì ÷àñû
+	set_bit(ASSR, AS0);
+	set_bit2(TCCR0, CS22, CS20); // x128, êàæäóþ ñåêóíäó
+	set_bit(TIMSK, TOIE0);
+}
+
+int days(int month, int year)
+{
+	switch (month)
+	{
+		case 1:
+		case 3:
+		case 5:
+		case 7:
+		case 8:
+		case 10:
+		case 12:		
+			return 31;
+		case 4:
+		case 6:
+		case 9:
+		case 11:
+			return 30;
+		case 2:
+			return (year % 4 == 0) ? 29 : 28;
+	}
+	return 0;
+}
+
+ISR(TIMER0_OVF_vect)
+{
+	sec++;
+	if (sec > 59)
+	{
+		min++;
+		sec = 0;
+	}
+	if (min > 59)
+	{
+		hour++;
+		min = 0;
+	}
+	if (hour > 23)
+	{
+		mday++;
+		hour = 0;
+	}
+	if (mday > days(month, year))
+	{
+		month++;
+		mday = 1;
+	}
+	if (month > 12)
+	{
+		year++;
+		month = 1;
+	}
+}
+
diff --git a/rtc.h b/rtc.h
new file mode 100644
index 0000000..f4181fd
--- /dev/null
+++ b/rtc.h
@@ -0,0 +1,10 @@
+#ifndef RTC_DEFINED
+#define RTC_DEFINED
+
+#include "integer.h"
+
+DWORD get_fattime (void);
+void set_time(int s_year, int s_month, int s_mday, int s_hour, int s_min, int s_sec);
+void time_init();
+
+#endif
diff --git a/sound.c b/sound.c
new file mode 100644
index 0000000..cfa9da0
--- /dev/null
+++ b/sound.c
@@ -0,0 +1,398 @@
+#include "defines.h"
+#include <string.h>
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include <avr/pgmspace.h>
+#include "sound.h"
+#include "bits.h"
+
+#define NBSIZE 32
+#define FCC(c1,c2,c3,c4)	(((DWORD)c4<<24)+((DWORD)c3<<16)+(c2<<8)+c1)	/* FourCC */
+
+FATFS FATFS_Obj;
+FIL file;
+BYTE buffer[2048];
+volatile UINT playMode;
+volatile UINT readPosition = 0;
+volatile UINT writePosition = 0;
+volatile UINT bufferLeft = 0;
+DWORD fileLeft = 0;
+char playingSound = 0;
+char recordingSound = 0;
+volatile DWORD beep_left = 0;
+UINT beep_freq = 0;
+DWORD recordedBytes = 0;
+
+void sound_init()
+{
+	/* Configure OC3B/OC3C as audio output (Fast PWM) */
+	TCNT3 = 0;
+	TCCR3A = _BV(COM3B1) | _BV(COM3C1) | _BV(WGM30);
+	TCCR3B = _BV(WGM32) | _BV(CS30);
+	OCR3B = 0x80; 
+	OCR3C = 0x80;		/* Center level */
+	DDRE |= _BV(4) | _BV(5);	/* Attach OC3B/OC3C to I/O pad */
+}
+
+void sound_freq_timer(unsigned int freq)
+{
+	if (!freq)
+	{
+		TCCR1B = 0;			/* Stop sampling interrupt (Timer1) */
+		TIMSK &= ~_BV(OCIE1A);
+	} else {
+	
+		/* Configure TIMER1 as sampling interval timer */
+		OCR1A = F_CPU / freq - 1;
+		TCNT1 = 0;
+		TCCR1A = 0;
+		TCCR1B = _BV(WGM12) | _BV(CS10);
+		TIMSK |= _BV(OCIE1A);
+	}
+}
+
+ISR(TIMER1_COMPA_vect)
+{
+	if (playingSound)
+	{
+		UINT ri = readPosition;
+		BYTE *buff, l, r;
+		buff = buffer + ri;
+
+		switch (playMode) {
+		case 0:		/* Mono, 8bit */
+			if (bufferLeft < 1) return;
+			l = r = buff[0];
+			bufferLeft -= 1; ri += 1;
+			break;
+		case 1:		/* Stereo, 8bit */
+			if (bufferLeft < 2) return;
+			l = buff[0]; r = buff[1];
+			bufferLeft -= 2; ri += 2;
+			break;
+		case 2:		/* Mono, 16bit */
+			if (bufferLeft < 2) return;
+			l = r = buff[1] + 128;
+			bufferLeft -= 2; ri += 2;
+			break;
+		default:	/* Stereo, 16bit */
+			if (bufferLeft < 4) return;
+			l = buff[1]; r = buff[3];
+			bufferLeft -= 4; ri += 4;
+		}
+	
+		readPosition = ri & (sizeof(buffer) - 1);
+
+		OCR3B = l;
+		OCR3C = r;
+	} else if (recordingSound)
+	{
+		UINT wi = writePosition;
+		BYTE *buff;
+		buff = buffer + wi;
+		int value = ADC;
+		if (value < 0x200) 
+			value += 512;
+			else value -= 512;
+		value += -384+(RECORD_FIX);		
+		if (value < 0) value = 0;
+		if (value > 0xFF) value = 0xFF;		
+		//if (value >= 0x80-NOICE_LEVEL && value <= 0x80+NOICE_LEVEL) value = 0x80; // Íåáîëüøàÿ çàùèòà îò øóìîâ...
+		*buff = value;
+		wi++;
+		OCR3C = value; // Âîñïðîèçâåäåíèå íà âñòðîåííûé äèíàìèê
+		writePosition = wi & (sizeof(buffer) - 1);
+		bufferLeft++;
+		set_bit(ADCSRA, ADSC);
+	} else if (beep_left)
+	{
+		if ((beep_left * beep_freq * 2 / 8000) % 2 == 0)
+		{
+//			PORTE |= _BV(4);	
+//			DDRE |= _BV(4);	
+			OCR3B = 0xFF;
+			OCR3C = 0xFF;
+		} else {
+//			PORTE &= ~_BV(4);	
+			OCR3B = 0;
+			OCR3C = 0;
+		}
+		beep_left--;
+	}
+}
+
+void sound_stop(void)
+{	
+	OCR3B = 0x80;
+	OCR3C = 0x80;
+	sound_freq_timer(0);
+
+	if (recordingSound)
+	{
+		UINT bw;
+		f_lseek(&file, 0x04);
+		DWORD chunkSize = recordedBytes + 36;		
+		f_write(&file, &chunkSize, 4, &bw);
+		f_lseek(&file, 0x28);
+		f_write(&file, &recordedBytes, 4, &bw);
+	}
+
+	playingSound = recordingSound = 0;
+
+	f_close(&file);
+}
+
+int sound_read()
+{
+	if (fileLeft || bufferLeft >= 4)
+	{
+		if (fileLeft && bufferLeft <= sizeof(buffer) / 2)
+		{	/* Refill FIFO when it gets half empty */
+			UINT br = 0;
+			UINT btr = (fileLeft >= sizeof(buffer) / 2) ? sizeof(buffer) / 2 : fileLeft;
+			f_read(&file, &buffer[writePosition], btr, &br);
+			if (br != btr)
+			{
+				sound_stop();
+				return -1;
+			}
+			fileLeft -= br;
+			writePosition = (writePosition + br) & (sizeof(buffer) - 1);
+			cli();
+			bufferLeft += br;
+			sei();
+			return br;
+		}
+		return 0;
+	}
+	sound_stop();
+	return -1;
+}
+
+int sound_write()
+{
+	if (bufferLeft >= sizeof(buffer) / 2)
+	{
+		UINT br = 0;
+		UINT btr = (bufferLeft >= sizeof(buffer) / 2) ? sizeof(buffer) / 2 : bufferLeft;
+		f_write(&file, &buffer[readPosition], btr, &br);
+		if (br != btr)
+		{
+			sound_stop();
+			return 0;
+		}
+		readPosition = (readPosition + br) & (sizeof(buffer) - 1);
+		//cli();
+		bufferLeft -= br;
+		//sei();
+		recordedBytes += br;
+		return br;
+	}
+	return 0;
+}
+
+
+int init_wav_play()
+{
+	UINT br;
+	DWORD sz, ssz, offw, wsmp, fsmp, eof;
+	char *p, nam[NBSIZE], art[NBSIZE];
+
+
+	/* Is it a WAV file? */
+	if (f_read(&file, buffer, 12, &br) || br != 12) return -1;
+	if (LD_DWORD(&buffer[0]) != FCC('R','I','F','F')) return -2;
+	if (LD_DWORD(&buffer[8]) != FCC('W','A','V','E')) return -3;
+	eof = LD_DWORD(&buffer[4]) + 8;
+
+	/* Analyze the RIFF-WAVE header and get properties */
+	nam[0] = art[0] = 0;
+	playMode = fsmp = wsmp = offw = fileLeft = 0;
+	while (f_tell(&file) < eof) {
+		if (f_read(&file, buffer, 8, &br) || br != 8) return -4;
+		sz = (LD_DWORD(&buffer[4]) + 1) & ~1;
+		switch (LD_DWORD(&buffer[0])) {
+		case FCC('f','m','t',' ') :
+			if (sz > 1000 || sz < 16 || f_read(&file, buffer, sz, &br) || sz != br) return -5;
+			if (LD_WORD(&buffer[0]) != 0x1) return -6;	/* Check if LPCM */
+			if (LD_WORD(&buffer[2]) == 2) {	/* Channels (1 or 2) */
+				playMode = 1; wsmp = 2;
+			} else {
+				playMode = 0; wsmp = 1;
+			}
+			if (LD_WORD(&buffer[14]) == 16) {	/* Resolution (8 or 16) */
+				playMode |= 2; wsmp *= 2;
+			}
+			fsmp = LD_DWORD(&buffer[4]);		/* Sampling rate */
+			break;
+
+		case FCC('f','a','c','t') :
+			f_lseek(&file, f_tell(&file) + sz);
+			break;
+
+		case FCC('d','a','t','a') :
+			offw = f_tell(&file);	/* Wave data start offset */
+			fileLeft = sz;			/* Wave data length [byte] */
+			f_lseek(&file, f_tell(&file) + sz);
+			break;
+
+		case FCC('L','I','S','T'):
+			sz += f_tell(&file);
+			if (f_read(&file, buffer, 4, &br) || br != 4) return -7;
+			if (LD_DWORD(buffer) == FCC('I','N','F','O')) {	/* LIST/INFO chunk */
+				while (f_tell(&file) < sz) {
+					if (f_read(&file, buffer, 8, &br) || br != 8) return -8;
+					ssz = (LD_DWORD(&buffer[4]) + 1) & ~1;
+					p = 0;
+					switch (LD_DWORD(buffer)) {
+					case FCC('I','N','A','M'):		/* INAM sub-chunk */
+						p = nam; break;
+					case FCC('I','A','R','T'):		/* IART sub-cnunk */
+						p = art; break;
+					}
+					if (p && ssz <= NBSIZE) {
+						if (f_read(&file, p, ssz, &br) || br != ssz) return -9;
+					} else {
+						if (f_lseek(&file, f_tell(&file) + ssz)) return -10;
+					}
+				}
+			} else {
+				if (f_lseek(&file, sz)) return -11;	/* Skip unknown sub-chunk type */
+			}
+			break;
+
+		default :	/* Unknown chunk */
+			return -12;
+		}
+	}
+	if (!fileLeft || !fsmp) return -13;		/* Check if valid WAV file */
+	if (f_lseek(&file, offw)) return -14;	/* Seek to top of wav data */
+	if (fsmp < 8000 || fsmp > 44100) return -15;	/* Check fs range */
+	
+	readPosition = 0; writePosition = 0; bufferLeft = 0;	/* Flush FIFO */
+	
+	sound_read();
+
+	sound_init();
+	sound_freq_timer(fsmp);
+	
+	return 0;
+}
+
+int play_wav(char* filename)
+{
+	sound_stop();
+	f_mount(0, &FATFS_Obj); // Ïåðåìîíòèðîâàíèå íà ñëó÷àé, åñëè SD êàðòà âûòàñêèâàëàñü
+	if (f_open(&file, filename, FA_READ) != 0) return -1;
+	if (init_wav_play() < 0)
+	{
+		f_close(&file);
+		return -1;
+	}
+	playingSound = 1;
+	return 0;
+}
+
+int play_wav_pgm(char* filename)
+{
+	BYTE* b = buffer;
+	while ((*b = pgm_read_byte(filename)) != 0)
+	{
+		filename++;
+		b++;
+	}
+	return play_wav((char*)buffer);
+}
+
+int play_wav_auto(char* filename)
+{
+	if (play_wav(filename) != 0) return -1;
+	while (sound_read() >= 0 && !CONTROL) ;
+	sound_stop();
+	return 0;
+}
+
+int play_wav_auto_pgm(char* filename)
+{
+	BYTE* b = buffer;
+	while ((*b = pgm_read_byte(filename)) != 0)
+	{
+		filename++;
+		b++;
+	}
+	return play_wav_auto((char*)buffer);
+}
+
+int init_wav_rec()
+{
+	recordedBytes = readPosition = 0; writePosition = 0; bufferLeft = 0;	/* Flush FIFO */
+	// Äëÿ âûâîäà íà âñòðîåííûé äèíàìèê òîãî, ÷òî ïèøåì
+	TCNT3 = 0;
+	TCCR3A = _BV(COM3C1) | _BV(WGM30);
+	TCCR3B = _BV(WGM32) | _BV(CS30);
+	OCR3C = 0x80;
+	DDRE |= _BV(5);	
+
+	// Ñíèìàåì íàïðÿæåíèå ñ íîãè âûâîäà çâóêà
+	DDRE &= ~_BV(4);
+	PORTE &= ~_BV(4);
+	
+	// ADC1 - ïîçèòèâíûé, ADC0 - íåãàòèâíûé, óñèëåíèå 10x
+	unset_bit(ADCSRA, ADEN);
+	ADMUX = _BV(REFS0) | _BV(MUX3) | _BV(MUX0); /*| (1 << REFS1);*/ 
+	//ADCSRB = 0;
+	unset_bit(DDRF, 0);
+	unset_bit(PORTF, 0);
+	unset_bit(DDRF, 1);
+	unset_bit(PORTF, 1);
+	//set_bit(ADCSRA, ADATE);
+	unset_bit3(ADCSRA, ADPS2, ADPS1, ADPS0);
+	set_bit(ADCSRA, ADEN);
+	set_bit(ADCSRA, ADSC);
+
+	sound_freq_timer(8000);
+	
+	return 0;
+}
+
+int rec_wav(char* filename)
+{
+	// Çàãîëîâîê íà 8êÃö
+	BYTE header[] = {0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00, 0x57, 0x41, 0x56, 0x45, 0x66, 0x6D, 0x74, 0x20,
+					  0x10, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x40, 0x1F, 0x00, 0x00, 0x40, 0x1F, 0x00, 0x00,
+					  0x01, 0x00, 0x08, 0x00, 0x64, 0x61, 0x74, 0x61, 0x00, 0x00, 0x00, 0x00};
+/*	
+	// Çàãîëîâîê íà 16êÃö
+	BYTE header[] = {0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00, 0x57, 0x41, 0x56, 0x45, 0x66, 0x6D, 0x74, 0x20,
+					  0x10, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x80, 0x3E, 0x00, 0x00, 0x80, 0x3E, 0x00, 0x00,
+					  0x01, 0x00, 0x08, 0x00, 0x64, 0x61, 0x74, 0x61, 0x00, 0x00, 0x00, 0x00};
+*/					  
+	sound_stop();
+	f_mount(0, &FATFS_Obj);
+	if (f_open(&file, filename, FA_CREATE_ALWAYS | FA_WRITE) != 0) return -1;
+	UINT bw;
+	f_write(&file, header, sizeof(header), &bw);
+	if (bw != sizeof(header)) return -1;
+	if (init_wav_rec() < 0)
+	{
+		f_close(&file);
+		return -1;
+	}
+	
+	recordingSound = 1;
+	return 0;
+}
+
+void beep(int freq, int length)
+{
+	beep_left = length * 8;
+	beep_freq = freq;
+
+	sound_init();
+	sound_freq_timer(8000);
+
+	while (beep_left) ;
+
+	sound_freq_timer(0);
+}
+
diff --git a/sound.h b/sound.h
new file mode 100644
index 0000000..707297b
--- /dev/null
+++ b/sound.h
@@ -0,0 +1,18 @@
+#ifndef SOUND_DEFINED
+#define SOUND_DEFINED
+
+#include <util/delay.h>
+#include "ff.h"
+
+void sound_init();
+int play_wav_auto(char* filename);
+int play_wav_auto_pgm(char* filename);
+int play_wav(char* filename);
+int play_wav_pgm(char* filename);
+int rec_wav(char* filename);
+int sound_read();
+int sound_write();
+void sound_stop(void);
+void beep(int freq, int length);
+
+#endif
diff --git a/system/autofast.wav b/system/autofast.wav
new file mode 100644
index 0000000..7c9f92e
--- /dev/null
+++ b/system/autofast.wav
diff --git a/system/autolong.wav b/system/autolong.wav
new file mode 100644
index 0000000..cc2c687
--- /dev/null
+++ b/system/autolong.wav
diff --git a/system/automid.wav b/system/automid.wav
new file mode 100644
index 0000000..b008d51
--- /dev/null
+++ b/system/automid.wav
diff --git a/system/emeropen.wav b/system/emeropen.wav
new file mode 100644
index 0000000..a6a6140
--- /dev/null
+++ b/system/emeropen.wav
diff --git a/system/mainmenu.wav b/system/mainmenu.wav
new file mode 100644
index 0000000..ed17b7f
--- /dev/null
+++ b/system/mainmenu.wav
diff --git a/system/mode.wav b/system/mode.wav
new file mode 100644
index 0000000..0932511
--- /dev/null
+++ b/system/mode.wav
diff --git a/system/mode0.wav b/system/mode0.wav
new file mode 100644
index 0000000..8d72b2d
--- /dev/null
+++ b/system/mode0.wav
diff --git a/system/mode1.wav b/system/mode1.wav
new file mode 100644
index 0000000..597ec59
--- /dev/null
+++ b/system/mode1.wav
diff --git a/system/mode2.wav b/system/mode2.wav
new file mode 100644
index 0000000..b2ab9bf
--- /dev/null
+++ b/system/mode2.wav
diff --git a/system/mode3.wav b/system/mode3.wav
new file mode 100644
index 0000000..68d5aa6
--- /dev/null
+++ b/system/mode3.wav
diff --git a/system/mode4.wav b/system/mode4.wav
new file mode 100644
index 0000000..f345cae
--- /dev/null
+++ b/system/mode4.wav
diff --git a/system/mode5.wav b/system/mode5.wav
new file mode 100644
index 0000000..32cdb62
--- /dev/null
+++ b/system/mode5.wav
diff --git a/system/modelist.wav b/system/modelist.wav
new file mode 100644
index 0000000..8749a15
--- /dev/null
+++ b/system/modelist.wav
diff --git a/system/modetemp.wav b/system/modetemp.wav
new file mode 100644
index 0000000..feda19b
--- /dev/null
+++ b/system/modetemp.wav
diff --git a/system/modex.wav b/system/modex.wav
new file mode 100644
index 0000000..41d2c9c
--- /dev/null
+++ b/system/modex.wav
diff --git a/system/open.wav b/system/open.wav
new file mode 100644
index 0000000..a6c11c3
--- /dev/null
+++ b/system/open.wav
diff --git a/system/openme.wav b/system/openme.wav
new file mode 100644
index 0000000..d2c04a4
--- /dev/null
+++ b/system/openme.wav
diff --git a/system/saved.wav b/system/saved.wav
new file mode 100644
index 0000000..cffe332
--- /dev/null
+++ b/system/saved.wav
diff --git a/system/started.wav b/system/started.wav
new file mode 100644
index 0000000..1501ef6
--- /dev/null
+++ b/system/started.wav
diff --git a/system/waitlong.wav b/system/waitlong.wav
new file mode 100644
index 0000000..5e9512e
--- /dev/null
+++ b/system/waitlong.wav
diff --git a/system/zdrasti.wav b/system/zdrasti.wav
new file mode 100644
index 0000000..93e9a3d
--- /dev/null
+++ b/system/zdrasti.wav
diff --git a/transfer.c b/transfer.c
new file mode 100644
index 0000000..3aa6670
--- /dev/null
+++ b/transfer.c
@@ -0,0 +1,77 @@
+#include "defines.h"
+#include "transfer.h"
+#include <avr/io.h>
+#include <util/delay.h>
+#include <stdio.h>
+#include "clunet.h"
+#include "ff.h"
+#include "diskio.h"
+
+volatile char transfer_active = 0;
+volatile unsigned char transfer_address = 0;
+volatile unsigned long int transfer_file_number = 0;
+volatile unsigned long int transfer_file_position = 0;
+volatile int transfer_timeout = 0;
+volatile int transfer_repeats = 0;
+
+// Ôóíêöèÿ ïåðåäà÷è ôàéëîâ, âûçûâàòü ïåðèîäè÷åñêè
+void transfer_data()
+{
+	if (!transfer_active) return; // Åñëè íåò ïåðåäà÷è äàííûõ, íàì òóò íå÷åãî äåëàòü
+	LED_GREEN_ON;
+	LED_RED_ON;
+	if (transfer_timeout == 0) // Åñëè íå â ñîñòîÿíèè îæèäàíèÿ îòâåòà
+	{
+		unsigned char buffer[4+4+TRANSFER_PACKET_SIZE];
+		*((unsigned long int*)buffer) = transfer_file_number; // Íîìåð ôàéëà
+		*((unsigned long int*)&buffer[4]) = transfer_file_position; // Ïîçèöèÿ...
+		char filename[16];
+		sprintf(filename, "/%08lu.wav", transfer_file_number); // Ôîðìèðóåì èìÿ ôàéëà
+		UINT br = 0; // Ñêîëüêî ïðî÷èòàíî áàéò...
+		FIL file;
+		if (f_open(&file, filename, FA_READ) == 0)
+		{
+			f_lseek(&file, transfer_file_position);
+			f_read(&file, &buffer[8], TRANSFER_PACKET_SIZE, &br);
+			f_close(&file);
+		}
+		clunet_send(transfer_address, CLUNET_PRIORITY_MESSAGE, CLUNET_COMMAND_INTERCOM_RECORD_DATA, (char*)&buffer, 8+br); // Êóñîê ôàéëà
+	}
+	transfer_timeout++; // Ñ÷èòàåì òàéìàóò...
+	if (transfer_timeout >= TRANSFER_TIMEOUT) // È åñëè äîëãî íåò îòâåòà
+	{ 
+		transfer_repeats++; // Ïûòàåìñÿ ïîâòîðèòü
+		transfer_timeout = 0; 
+		if (transfer_repeats >= 3) transfer_active = 0; // Íî ïîñëå òð¸õ ïîâòîðîâ îòìåíÿåì ïåðåäà÷ó
+	}
+	LED_RED_OFF;
+	_delay_ms(TRANSFER_PAUSE); // Çàäåðæèâàåìñÿ êàæäûé ðàç
+	LED_GREEN_OFF;
+}
+
+// Âûçûâàòü äëÿ íà÷àëà ïåðåäà÷è ôàéëîâ
+void transfer_start(unsigned long int number, unsigned char address)
+{
+	transfer_file_number = number;
+	transfer_file_position = 
+		transfer_timeout =
+		transfer_repeats = 0;
+	transfer_address = address;
+	transfer_active = 1;
+}
+
+// Ïîäòâåðæäåíèå ïðè¸ìà ïàêåòà
+void transfer_ack()
+{
+	// Ïðè¸ì ïàêåòà ïîäòâåðæä¸ì, äâèæåìñÿ ïî ôàéëó äàëüøå
+	transfer_file_position += TRANSFER_PACKET_SIZE;
+		transfer_timeout =
+		transfer_repeats = 0;
+}
+
+// Ïðåêðàùåíèå ïåðåäà÷è
+void transfer_stop()
+{
+	transfer_active = 0;
+}
+
diff --git a/transfer.h b/transfer.h
new file mode 100644
index 0000000..ee38212
--- /dev/null
+++ b/transfer.h
@@ -0,0 +1,11 @@
+// Ôóíêöèÿ ïåðåäà÷è ôàéëîâ, âûçûâàòü ïåðèîäè÷åñêè
+void transfer_data();
+
+// Âûçûâàòü äëÿ íà÷àëà ïåðåäà÷è ôàéëîâ
+void transfer_start(unsigned long int number, unsigned char address);
+
+// Ïîäòâåðæäåíèå ïðè¸ìà ïàêåòà
+void transfer_ack();
+
+// Ïðåêðàùåíèå ïåðåäà÷è
+void transfer_stop();