diff options
Diffstat (limited to 'ArduinoAddons/Arduino_1.0.x/libraries/U8glib/utility/u8g_com_arduino_sw_spi.c')
| -rwxr-xr-x | ArduinoAddons/Arduino_1.0.x/libraries/U8glib/utility/u8g_com_arduino_sw_spi.c | 301 |
1 files changed, 301 insertions, 0 deletions
diff --git a/ArduinoAddons/Arduino_1.0.x/libraries/U8glib/utility/u8g_com_arduino_sw_spi.c b/ArduinoAddons/Arduino_1.0.x/libraries/U8glib/utility/u8g_com_arduino_sw_spi.c new file mode 100755 index 000000000..7752adc82 --- /dev/null +++ b/ArduinoAddons/Arduino_1.0.x/libraries/U8glib/utility/u8g_com_arduino_sw_spi.c @@ -0,0 +1,301 @@ +/* + + u8g_arduino_sw_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. + + 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 + +/*=========================================================*/ +/* Arduino, AVR */ + +#if defined(__AVR__) + +uint8_t u8g_bitData, u8g_bitNotData; +uint8_t u8g_bitClock, u8g_bitNotClock; +volatile uint8_t *u8g_outData; +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(); + do + { + if ( val & 128 ) + *outData |= bitData; + else + *outData &= bitNotData; + + *outClock |= bitClock; + val <<= 1; + cnt--; + *outClock &= bitNotClock; + } while( cnt != 0 ); + U8G_ATOMIC_END(); +} + +/*=========================================================*/ +/* Arduino, Chipkit */ +#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; + /* + There must be some delay here. However + fetching the adress dog_outClock is enough delay, so + do not place dog_outClock in a local variable. This will + break the procedure + */ + *dog_outClock |= dog_bitClock; + cnt--; + *dog_outClock &= dog_bitNotClock; + /* + little additional delay after clk pulse, done by 3x32bit reads + from I/O. Optimized for PIC32 with 80 MHz. + */ + dog_pic32_spi_tmp = *dog_outClock; + dog_pic32_spi_tmp = *dog_outClock; + dog_pic32_spi_tmp = *dog_outClock; + } while( cnt != 0 ); + U8G_ATOMIC_END(); +} + +/*=========================================================*/ +/* Arduino Due */ +#elif defined(__SAM3X8E__) + +/* Due */ + +void u8g_digital_write_sam_high(uint8_t pin) +{ + PIO_Set( g_APinDescription[pin].pPort, g_APinDescription[pin].ulPin) ; +} + +void u8g_digital_write_sam_low(uint8_t pin) +{ + PIO_Clear( g_APinDescription[pin].pPort, g_APinDescription[pin].ulPin) ; +} + +static uint8_t u8g_sam_data_pin; +static uint8_t u8g_sam_clock_pin; + +static void u8g_com_arduino_init_shift_out(uint8_t dataPin, uint8_t clockPin) +{ + u8g_sam_data_pin = dataPin; + u8g_sam_clock_pin = clockPin; +} + +static void u8g_com_arduino_do_shift_out_msb_first(uint8_t val) +{ + uint8_t i = 8; + do + { + if ( val & 128 ) + u8g_digital_write_sam_high(u8g_sam_data_pin); + else + u8g_digital_write_sam_low(u8g_sam_data_pin); + val <<= 1; + //u8g_MicroDelay(); + u8g_digital_write_sam_high(u8g_sam_clock_pin); + u8g_MicroDelay(); + u8g_digital_write_sam_low(u8g_sam_clock_pin); + u8g_MicroDelay(); + i--; + } while( i != 0 ); +} + + +#else +/* empty interface */ + +static void u8g_com_arduino_init_shift_out(uint8_t dataPin, uint8_t clockPin) +{ +} + +static void u8g_com_arduino_do_shift_out_msb_first(uint8_t val) +{ +} + +#endif + + +uint8_t u8g_com_arduino_sw_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_SCK, LOW); + 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]); + 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 */ + u8g_com_arduino_digital_write(u8g, U8G_PI_CS, HIGH); + } + else + { + /* enable */ + u8g_com_arduino_digital_write(u8g, U8G_PI_SCK, LOW); + u8g_com_arduino_digital_write(u8g, U8G_PI_CS, LOW); + /* 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_do_shift_out_msb_first( arg_val ); + //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: + { + register uint8_t *ptr = arg_ptr; + while( arg_val > 0 ) + { + u8g_com_arduino_do_shift_out_msb_first(*ptr++); + // u8g_arduino_sw_spi_shift_out(u8g->pin_list[U8G_PI_MOSI], u8g->pin_list[U8G_PI_SCK], *ptr++); + arg_val--; + } + } + break; + + case U8G_COM_MSG_WRITE_SEQ_P: + { + register uint8_t *ptr = arg_ptr; + while( arg_val > 0 ) + { + u8g_com_arduino_do_shift_out_msb_first( u8g_pgm_read(ptr) ); + //u8g_arduino_sw_spi_shift_out(u8g->pin_list[U8G_PI_MOSI], u8g->pin_list[U8G_PI_SCK], u8g_pgm_read(ptr)); + ptr++; + arg_val--; + } + } + break; + + case U8G_COM_MSG_ADDRESS: /* define cmd (arg_val = 0) or data mode (arg_val = 1) */ + u8g_com_arduino_digital_write(u8g, U8G_PI_A0, arg_val); + break; + } + return 1; +} + +#else /* ARDUINO */ + +uint8_t u8g_com_arduino_sw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr) +{ + return 1; +} + +#endif /* ARDUINO */ + |