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Diffstat (limited to 'ArduinoAddons/Arduino_1.0.x/libraries/U8glib/utility/u8g_com_arduino_st7920_spi.c')
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diff --git a/ArduinoAddons/Arduino_1.0.x/libraries/U8glib/utility/u8g_com_arduino_st7920_spi.c b/ArduinoAddons/Arduino_1.0.x/libraries/U8glib/utility/u8g_com_arduino_st7920_spi.c
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index 000000000..9a5c2bef3
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+++ b/ArduinoAddons/Arduino_1.0.x/libraries/U8glib/utility/u8g_com_arduino_st7920_spi.c
@@ -0,0 +1,330 @@
+/*
+
+ u8g_com_arduino_st7920_spi.c
+
+ Universal 8bit Graphics Library
+
+ Copyright (c) 2011, olikraus@gmail.com
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without modification,
+ are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright notice, this list
+ of conditions and the following disclaimer.
+
+ * Redistributions in binary form must reproduce the above copyright notice, this
+ list of conditions and the following disclaimer in the documentation and/or other
+ materials provided with the distribution.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+ CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ A special SPI interface for ST7920 controller
+
+ Update for ATOMIC operation done (01 Jun 2013)
+ U8G_ATOMIC_OR(ptr, val)
+ U8G_ATOMIC_AND(ptr, val)
+ U8G_ATOMIC_START();
+ U8G_ATOMIC_END();
+
+
+*/
+
+#include "u8g.h"
+
+#if defined(ARDUINO)
+
+#if ARDUINO < 100
+#include <WProgram.h>
+#include "wiring_private.h"
+#include "pins_arduino.h"
+
+#else
+#include <Arduino.h>
+#include "wiring_private.h"
+#endif
+
+#if defined(__AVR__)
+
+static uint8_t u8g_bitData, u8g_bitNotData;
+static uint8_t u8g_bitClock, u8g_bitNotClock;
+static volatile uint8_t *u8g_outData;
+static volatile uint8_t *u8g_outClock;
+
+static void u8g_com_arduino_init_shift_out(uint8_t dataPin, uint8_t clockPin)
+{
+ u8g_outData = portOutputRegister(digitalPinToPort(dataPin));
+ u8g_outClock = portOutputRegister(digitalPinToPort(clockPin));
+ u8g_bitData = digitalPinToBitMask(dataPin);
+ u8g_bitClock = digitalPinToBitMask(clockPin);
+
+ u8g_bitNotClock = u8g_bitClock;
+ u8g_bitNotClock ^= 0x0ff;
+
+ u8g_bitNotData = u8g_bitData;
+ u8g_bitNotData ^= 0x0ff;
+}
+
+static void u8g_com_arduino_do_shift_out_msb_first(uint8_t val) U8G_NOINLINE;
+static void u8g_com_arduino_do_shift_out_msb_first(uint8_t val)
+{
+ uint8_t cnt = 8;
+ uint8_t bitData = u8g_bitData;
+ uint8_t bitNotData = u8g_bitNotData;
+ uint8_t bitClock = u8g_bitClock;
+ uint8_t bitNotClock = u8g_bitNotClock;
+ volatile uint8_t *outData = u8g_outData;
+ volatile uint8_t *outClock = u8g_outClock;
+
+
+ U8G_ATOMIC_START();
+ bitData |= *outData;
+ bitNotData &= *outData;
+ do
+ {
+ if ( val & 128 )
+ *outData = bitData;
+ else
+ *outData = bitNotData;
+
+ /*
+ *outClock |= bitClock;
+ val <<= 1;
+ cnt--;
+ *outClock &= bitNotClock;
+ */
+
+ val <<= 1;
+ *outClock &= bitNotClock;
+ cnt--;
+ // removed micro delays, because AVRs are too slow and the delay is not required
+ //u8g_MicroDelay();
+ *outClock |= bitClock;
+ //u8g_MicroDelay();
+ } while( cnt != 0 );
+ U8G_ATOMIC_END();
+}
+
+#elif defined(__18CXX) || defined(__PIC32MX)
+
+uint16_t dog_bitData, dog_bitNotData;
+uint16_t dog_bitClock, dog_bitNotClock;
+volatile uint32_t *dog_outData;
+volatile uint32_t *dog_outClock;
+volatile uint32_t dog_pic32_spi_tmp;
+
+static void u8g_com_arduino_init_shift_out(uint8_t dataPin, uint8_t clockPin)
+{
+ dog_outData = portOutputRegister(digitalPinToPort(dataPin));
+ dog_outClock = portOutputRegister(digitalPinToPort(clockPin));
+ dog_bitData = digitalPinToBitMask(dataPin);
+ dog_bitClock = digitalPinToBitMask(clockPin);
+
+ dog_bitNotClock = dog_bitClock;
+ dog_bitNotClock ^= 0x0ffff;
+
+ dog_bitNotData = dog_bitData;
+ dog_bitNotData ^= 0x0ffff;
+}
+
+static void u8g_com_arduino_do_shift_out_msb_first(uint8_t val)
+{
+ uint8_t cnt = 8;
+ U8G_ATOMIC_START();
+ do
+ {
+ if ( val & 128 )
+ *dog_outData |= dog_bitData;
+ else
+ *dog_outData &= dog_bitNotData;
+ val <<= 1;
+ //u8g_MicroDelay();
+ //*dog_outClock |= dog_bitClock;
+ *dog_outClock &= dog_bitNotClock;
+ cnt--;
+ u8g_MicroDelay();
+ //*dog_outClock &= dog_bitNotClock;
+ *dog_outClock |= dog_bitClock;
+ u8g_MicroDelay();
+
+ } while( cnt != 0 );
+ U8G_ATOMIC_END();
+}
+
+#else
+
+/* default interface, Arduino DUE (__arm__) */
+
+uint8_t u8g_data_pin;
+uint8_t u8g_clock_pin;
+
+static void u8g_com_arduino_init_shift_out(uint8_t dataPin, uint8_t clockPin)
+{
+ u8g_data_pin = dataPin;
+ u8g_clock_pin = clockPin;
+}
+
+static void u8g_com_arduino_do_shift_out_msb_first(uint8_t val)
+{
+ uint8_t cnt = 8;
+ do
+ {
+ if ( val & 128 )
+ digitalWrite(u8g_data_pin, HIGH);
+ else
+ digitalWrite(u8g_data_pin, LOW);
+ val <<= 1;
+ //u8g_MicroDelay();
+ digitalWrite(u8g_clock_pin, LOW);
+ cnt--;
+ u8g_MicroDelay();
+ digitalWrite(u8g_clock_pin, HIGH);
+ u8g_MicroDelay();
+ } while( cnt != 0 );
+}
+
+#endif
+
+
+static void u8g_com_arduino_st7920_write_byte_seq(uint8_t rs, uint8_t *ptr, uint8_t len)
+{
+ uint8_t i;
+
+ if ( rs == 0 )
+ {
+ /* command */
+ u8g_com_arduino_do_shift_out_msb_first(0x0f8);
+ }
+ else if ( rs == 1 )
+ {
+ /* data */
+ u8g_com_arduino_do_shift_out_msb_first(0x0fa);
+ }
+
+ while( len > 0 )
+ {
+ u8g_com_arduino_do_shift_out_msb_first(*ptr & 0x0f0);
+ u8g_com_arduino_do_shift_out_msb_first(*ptr << 4);
+ ptr++;
+ len--;
+ u8g_10MicroDelay();
+ }
+
+ for( i = 0; i < 4; i++ )
+ u8g_10MicroDelay();
+}
+
+static void u8g_com_arduino_st7920_write_byte(uint8_t rs, uint8_t val)
+{
+ uint8_t i;
+
+ if ( rs == 0 )
+ {
+ /* command */
+ u8g_com_arduino_do_shift_out_msb_first(0x0f8);
+ }
+ else if ( rs == 1 )
+ {
+ /* data */
+ u8g_com_arduino_do_shift_out_msb_first(0x0fa);
+ }
+
+ u8g_com_arduino_do_shift_out_msb_first(val & 0x0f0);
+ u8g_com_arduino_do_shift_out_msb_first(val << 4);
+
+ for( i = 0; i < 4; i++ )
+ u8g_10MicroDelay();
+
+}
+
+
+uint8_t u8g_com_arduino_st7920_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr)
+{
+ switch(msg)
+ {
+ case U8G_COM_MSG_INIT:
+ u8g_com_arduino_assign_pin_output_high(u8g);
+ u8g_com_arduino_digital_write(u8g, U8G_PI_CS, LOW);
+ // u8g_com_arduino_digital_write(u8g, U8G_PI_SCK, LOW);
+ u8g_com_arduino_digital_write(u8g, U8G_PI_SCK, HIGH);
+ u8g_com_arduino_digital_write(u8g, U8G_PI_MOSI, LOW);
+ u8g_com_arduino_init_shift_out(u8g->pin_list[U8G_PI_MOSI], u8g->pin_list[U8G_PI_SCK]);
+ u8g->pin_list[U8G_PI_A0_STATE] = 0; /* inital RS state: command mode */
+ break;
+
+ case U8G_COM_MSG_STOP:
+ break;
+
+ case U8G_COM_MSG_RESET:
+ if ( u8g->pin_list[U8G_PI_RESET] != U8G_PIN_NONE )
+ u8g_com_arduino_digital_write(u8g, U8G_PI_RESET, arg_val);
+ break;
+
+ case U8G_COM_MSG_CHIP_SELECT:
+ if ( arg_val == 0 )
+ {
+ /* disable, note: the st7920 has an active high chip select */
+ u8g_com_arduino_digital_write(u8g, U8G_PI_CS, LOW);
+ }
+ else
+ {
+ /* enable */
+ //u8g_com_arduino_digital_write(u8g, U8G_PI_SCK, HIGH);
+ u8g_com_arduino_digital_write(u8g, U8G_PI_CS, HIGH);
+ /* 28 Dec 2013 reassign pins, fixes issue with more than one display */
+ /* issue 227 */
+ u8g_com_arduino_init_shift_out(u8g->pin_list[U8G_PI_MOSI], u8g->pin_list[U8G_PI_SCK]);
+ }
+ break;
+
+ case U8G_COM_MSG_WRITE_BYTE:
+ u8g_com_arduino_st7920_write_byte( u8g->pin_list[U8G_PI_A0_STATE], arg_val);
+ //u8g->pin_list[U8G_PI_A0_STATE] = 2;
+ //u8g_arduino_sw_spi_shift_out(u8g->pin_list[U8G_PI_MOSI], u8g->pin_list[U8G_PI_SCK], arg_val);
+ break;
+
+ case U8G_COM_MSG_WRITE_SEQ:
+ u8g_com_arduino_st7920_write_byte_seq(u8g->pin_list[U8G_PI_A0_STATE], (uint8_t *)arg_ptr, arg_val);
+ break;
+
+ case U8G_COM_MSG_WRITE_SEQ_P:
+ {
+ register uint8_t *ptr = arg_ptr;
+ while( arg_val > 0 )
+ {
+ u8g_com_arduino_st7920_write_byte(u8g->pin_list[U8G_PI_A0_STATE], u8g_pgm_read(ptr) );
+ //u8g->pin_list[U8G_PI_A0_STATE] = 2;
+ ptr++;
+ arg_val--;
+ }
+ }
+ break;
+
+ case U8G_COM_MSG_ADDRESS: /* define cmd (arg_val = 0) or data mode (arg_val = 1) */
+ u8g->pin_list[U8G_PI_A0_STATE] = arg_val;
+ break;
+ }
+ return 1;
+}
+
+#else /* ARDUINO */
+
+uint8_t u8g_com_arduino_st7920_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr)
+{
+ return 1;
+}
+
+#endif /* ARDUINO */
+
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