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169 lines
4.7 KiB
169 lines
4.7 KiB
![]()
12 years ago
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/*
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u8g_arduino_port_d_wr.c
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Universal 8bit Graphics Library
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Copyright (c) 2011, olikraus@gmail.com
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this list
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of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice, this
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list of conditions and the following disclaimer in the documentation and/or other
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materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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Assumes PORTD for 8 bit data transfer.
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EN is assumed to be a low active write signal (WR)
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ILI9325D_320x240 from iteadstudio.com
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RS=19, WR=18, CS=17, RST=16
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u8g_Init8Bit(u8g, dev, d0, d1, d2, d3, d4, d5, d6, d7, en, cs1, cs2, di, rw, reset)
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u8g_Init8Bit(u8g, dev, 8, 9, 10, 11, 4, 5, 6, 7, 18, 14, 15, 17, 16, U8G_PIN_NONE)
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*/
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#include "u8g.h"
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#if defined(ARDUINO) && defined(PORTD)
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#if ARDUINO < 100
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#include <WProgram.h>
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#else
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#include <Arduino.h>
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#endif
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static void u8g_com_arduino_port_d_8bit_wr(u8g_t *u8g, uint8_t val)
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{
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PORTD = val;
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/* WR cycle time must be 1 micro second, digitalWrite is slow enough to do this */
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u8g_com_arduino_digital_write(u8g, U8G_PI_EN, LOW);
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u8g_com_arduino_digital_write(u8g, U8G_PI_EN, HIGH);
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}
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uint8_t u8g_com_arduino_port_d_wr_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr)
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{
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switch(msg)
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{
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case U8G_COM_MSG_INIT:
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#ifdef UCSR0B
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UCSR0B = 0; // disable USART 0
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#endif
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DDRD = 0x0ff;
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PORTD = 0x0ff;
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/* setup the RW pin as output and force it to low */
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if ( u8g->pin_list[U8G_PI_RW] != U8G_PIN_NONE )
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{
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pinMode(u8g->pin_list[U8G_PI_RW], OUTPUT);
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u8g_com_arduino_digital_write(u8g, U8G_PI_RW, HIGH);
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}
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/* set all pins (except RW pin) */
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u8g_com_arduino_assign_pin_output_high(u8g);
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u8g_com_arduino_digital_write(u8g, U8G_PI_EN, HIGH);
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break;
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case U8G_COM_MSG_STOP:
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break;
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case U8G_COM_MSG_CHIP_SELECT:
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if ( arg_val == 0 )
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{
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/* disable */
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u8g_com_arduino_digital_write(u8g, U8G_PI_CS1, HIGH);
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u8g_com_arduino_digital_write(u8g, U8G_PI_CS2, HIGH);
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}
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else if ( arg_val == 1 )
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{
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/* enable */
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u8g_com_arduino_digital_write(u8g, U8G_PI_CS1, LOW);
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u8g_com_arduino_digital_write(u8g, U8G_PI_CS2, HIGH);
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}
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else if ( arg_val == 2 )
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{
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/* enable */
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u8g_com_arduino_digital_write(u8g, U8G_PI_CS1, HIGH);
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u8g_com_arduino_digital_write(u8g, U8G_PI_CS2, LOW);
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}
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else
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{
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/* enable */
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u8g_com_arduino_digital_write(u8g, U8G_PI_CS1, LOW);
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u8g_com_arduino_digital_write(u8g, U8G_PI_CS2, LOW);
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}
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break;
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case U8G_COM_MSG_WRITE_BYTE:
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u8g_com_arduino_port_d_8bit_wr(u8g, arg_val);
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break;
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case U8G_COM_MSG_WRITE_SEQ:
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{
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register uint8_t *ptr = arg_ptr;
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while( arg_val > 0 )
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{
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u8g_com_arduino_port_d_8bit_wr(u8g, *ptr++);
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arg_val--;
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}
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}
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break;
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case U8G_COM_MSG_WRITE_SEQ_P:
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{
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register uint8_t *ptr = arg_ptr;
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while( arg_val > 0 )
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{
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u8g_com_arduino_port_d_8bit_wr(u8g, u8g_pgm_read(ptr));
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ptr++;
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arg_val--;
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}
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}
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break;
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case U8G_COM_MSG_ADDRESS: /* define cmd (arg_val = 0) or data mode (arg_val = 1) */
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u8g_com_arduino_digital_write(u8g, U8G_PI_DI, arg_val);
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break;
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case U8G_COM_MSG_RESET:
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if ( u8g->pin_list[U8G_PI_RESET] != U8G_PIN_NONE )
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u8g_com_arduino_digital_write(u8g, U8G_PI_RESET, arg_val);
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break;
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}
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return 1;
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}
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#else
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uint8_t u8g_com_arduino_port_d_wr_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr)
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{
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return 1;
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}
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#endif /* ARDUINO && PORTD */
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