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- /*
-
- u8g_arduino_port_d_wr.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.
-
-
- Assumes PORTD for 8 bit data transfer.
- EN is assumed to be a low active write signal (WR)
-
- ILI9325D_320x240 from iteadstudio.com
- RS=19, WR=18, CS=17, RST=16
-
-
- u8g_Init8Bit(u8g, dev, d0, d1, d2, d3, d4, d5, d6, d7, en, cs1, cs2, di, rw, reset)
- u8g_Init8Bit(u8g, dev, 8, 9, 10, 11, 4, 5, 6, 7, 18, 14, 15, 17, 16, U8G_PIN_NONE)
-
- */
-
- #include "u8g.h"
-
-
- #if defined(ARDUINO) && defined(PORTD)
-
- #if ARDUINO < 100
- #include <WProgram.h>
- #else
- #include <Arduino.h>
- #endif
-
-
-
-
-
-
- static void u8g_com_arduino_port_d_8bit_wr(u8g_t *u8g, uint8_t val)
- {
- PORTD = val;
-
- /* WR cycle time must be 1 micro second, digitalWrite is slow enough to do this */
- u8g_com_arduino_digital_write(u8g, U8G_PI_EN, LOW);
- u8g_com_arduino_digital_write(u8g, U8G_PI_EN, HIGH);
- }
-
-
- uint8_t u8g_com_arduino_port_d_wr_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr)
- {
-
- switch(msg)
- {
- case U8G_COM_MSG_INIT:
-
- #ifdef UCSR0B
- UCSR0B = 0; // disable USART 0
- #endif
- DDRD = 0x0ff;
- PORTD = 0x0ff;
-
- /* setup the RW pin as output and force it to low */
- if ( u8g->pin_list[U8G_PI_RW] != U8G_PIN_NONE )
- {
- pinMode(u8g->pin_list[U8G_PI_RW], OUTPUT);
- u8g_com_arduino_digital_write(u8g, U8G_PI_RW, HIGH);
- }
- /* set all pins (except RW pin) */
- u8g_com_arduino_assign_pin_output_high(u8g);
- u8g_com_arduino_digital_write(u8g, U8G_PI_EN, HIGH);
- break;
- case U8G_COM_MSG_STOP:
- break;
- case U8G_COM_MSG_CHIP_SELECT:
- if ( arg_val == 0 )
- {
- /* disable */
- u8g_com_arduino_digital_write(u8g, U8G_PI_CS1, HIGH);
- u8g_com_arduino_digital_write(u8g, U8G_PI_CS2, HIGH);
- }
- else if ( arg_val == 1 )
- {
- /* enable */
- u8g_com_arduino_digital_write(u8g, U8G_PI_CS1, LOW);
- u8g_com_arduino_digital_write(u8g, U8G_PI_CS2, HIGH);
- }
- else if ( arg_val == 2 )
- {
- /* enable */
- u8g_com_arduino_digital_write(u8g, U8G_PI_CS1, HIGH);
- u8g_com_arduino_digital_write(u8g, U8G_PI_CS2, LOW);
- }
- else
- {
- /* enable */
- u8g_com_arduino_digital_write(u8g, U8G_PI_CS1, LOW);
- u8g_com_arduino_digital_write(u8g, U8G_PI_CS2, LOW);
- }
- break;
- case U8G_COM_MSG_WRITE_BYTE:
- u8g_com_arduino_port_d_8bit_wr(u8g, arg_val);
- break;
- case U8G_COM_MSG_WRITE_SEQ:
- {
- register uint8_t *ptr = arg_ptr;
- while( arg_val > 0 )
- {
- u8g_com_arduino_port_d_8bit_wr(u8g, *ptr++);
- arg_val--;
- }
- }
- break;
- case U8G_COM_MSG_WRITE_SEQ_P:
- {
- register uint8_t *ptr = arg_ptr;
- while( arg_val > 0 )
- {
- u8g_com_arduino_port_d_8bit_wr(u8g, 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_DI, arg_val);
- 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;
- }
- return 1;
- }
-
- #else
-
-
- uint8_t u8g_com_arduino_port_d_wr_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr)
- {
- return 1;
- }
-
- #endif /* ARDUINO && PORTD */
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