123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144 |
- /*
-
- u8g_arduino_std_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.
-
-
- */
-
- #include "u8g.h"
-
-
- #if defined(ARDUINO)
-
- #if ARDUINO < 100
- #include <WProgram.h>
- #else
- #include <Arduino.h>
- #endif
-
- void u8g_arduino_sw_spi_shift_out(uint8_t dataPin, uint8_t clockPin, uint8_t val)
- {
- uint8_t i = 8;
- do
- {
- if ( val & 128 )
- digitalWrite(dataPin, HIGH);
- else
- digitalWrite(dataPin, LOW);
- val <<= 1;
- u8g_MicroDelay(); /* 23 Sep 2012 */
- //delay(1);
- digitalWrite(clockPin, HIGH);
- u8g_MicroDelay(); /* 23 Sep 2012 */
- //delay(1);
- digitalWrite(clockPin, LOW);
- u8g_MicroDelay(); /* 23 Sep 2012 */
- //delay(1);
- i--;
- } while( i != 0 );
- }
-
- uint8_t u8g_com_arduino_std_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);
- 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);
- }
- break;
-
- case U8G_COM_MSG_WRITE_BYTE:
- 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_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_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_std_sw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr)
- {
- return 1;
- }
-
- #endif /* ARDUINO */
|