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/*
* @file display.c
* Display library for ILI9481 display
*
* Copyright (C) 2018 Clyne Sullivan
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <display.h>
#include <clock.h>
#include <gpio.h>
#include <stdint.h>
#define LCD_RD GPIO_PORT(A, 0)
#define LCD_WR GPIO_PORT(A, 1)
#define LCD_RS GPIO_PORT(A, 4)
#define LCD_CS GPIO_PORT(B, 0)
#define LCD_RST GPIO_PORT(C, 1)
#define LCD_D0 GPIO_PORT(A, 9)
#define LCD_D1 GPIO_PORT(C, 7)
#define LCD_D2 GPIO_PORT(A, 10)
#define LCD_D3 GPIO_PORT(B, 3)
#define LCD_D4 GPIO_PORT(B, 5)
#define LCD_D5 GPIO_PORT(B, 4)
#define LCD_D6 GPIO_PORT(B, 10)
#define LCD_D7 GPIO_PORT(A, 8)
void dsp_dmode(int mode)
{
static int old = 0;
if (mode != old) {
gpio_mode(LCD_D0, mode);
gpio_mode(LCD_D1, mode);
gpio_mode(LCD_D2, mode);
gpio_mode(LCD_D3, mode);
gpio_mode(LCD_D4, mode);
gpio_mode(LCD_D5, mode);
gpio_mode(LCD_D6, mode);
gpio_mode(LCD_D7, mode);
old = mode;
}
}
// bbbbbggg gggrrrrr
uint16_t dsp_color(uint8_t r, uint8_t g, uint8_t b)
{
r &= 0x1F;
g &= 0x3F;
b &= 0x1F;
uint16_t c = (b << 11) | (g << 5) | r;
return c;
}
void dsp_write_data(uint8_t data)
{
gpio_dout(LCD_D0, data & 0x01);
gpio_dout(LCD_D1, data & 0x02);
gpio_dout(LCD_D2, data & 0x04);
gpio_dout(LCD_D3, data & 0x08);
gpio_dout(LCD_D4, data & 0x10);
gpio_dout(LCD_D5, data & 0x20);
gpio_dout(LCD_D6, data & 0x40);
gpio_dout(LCD_D7, data & 0x80);
gpio_dout(LCD_WR, 0);
gpio_dout(LCD_WR, 1);
}
uint8_t dsp_read_data(void)
{
uint8_t ret = 0;
gpio_dout(LCD_RD, 0);
ret |= gpio_din(LCD_D0);
ret |= gpio_din(LCD_D1) << 1;
ret |= gpio_din(LCD_D2) << 2;
ret |= gpio_din(LCD_D3) << 3;
ret |= gpio_din(LCD_D4) << 4;
ret |= gpio_din(LCD_D5) << 5;
ret |= gpio_din(LCD_D6) << 6;
ret |= gpio_din(LCD_D7) << 7;
gpio_dout(LCD_RD, 1);
return ret;
}
void dsp_write_cmd(uint8_t data)
{
gpio_dout(LCD_RS, 0);
dsp_write_data(data);
gpio_dout(LCD_RS, 1);
}
void dsp_set_addr_base(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2)
{
dsp_write_cmd(0x2A);
dsp_write_data(x1 >> 8);
dsp_write_data(x1 & 0xFF);
dsp_write_data(x2 >> 8);
dsp_write_data(x2 & 0xFF);
dsp_write_cmd(0x2B);
dsp_write_data(y1 >> 8);
dsp_write_data(y1 & 0xFF);
dsp_write_data(y2 >> 8);
dsp_write_data(y2 & 0xFF);
}
void dsp_set_addr(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2)
{
dsp_set_addr_base(x1, y1, x2, y2);
dsp_write_cmd(0x2C); // begin writing
}
void dsp_set_addr_read(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2)
{
dsp_set_addr_base(x1, y1, x2, y2);
dsp_write_cmd(0x2E); // begin reading
}
void dsp_init(void)
{
gpio_mode(LCD_CS, OUTPUT);
gpio_mode(LCD_RS, OUTPUT);
gpio_mode(LCD_RD, OUTPUT);
gpio_mode(LCD_WR, OUTPUT);
gpio_mode(LCD_RST, OUTPUT);
dsp_dmode(OUTPUT);
gpio_speed(LCD_CS, VERYHIGH);
gpio_speed(LCD_RS, VERYHIGH);
gpio_speed(LCD_RD, VERYHIGH);
gpio_speed(LCD_WR, VERYHIGH);
gpio_speed(LCD_RST, VERYHIGH);
gpio_speed(LCD_D0, VERYHIGH);
gpio_speed(LCD_D1, VERYHIGH);
gpio_speed(LCD_D2, VERYHIGH);
gpio_speed(LCD_D3, VERYHIGH);
gpio_speed(LCD_D4, VERYHIGH);
gpio_speed(LCD_D5, VERYHIGH);
gpio_speed(LCD_D6, VERYHIGH);
gpio_speed(LCD_D7, VERYHIGH);
gpio_dout(LCD_CS, 0);
gpio_dout(LCD_RS, 1);
gpio_dout(LCD_RD, 1);
gpio_dout(LCD_WR, 1);
gpio_dout(LCD_RST, 1);
gpio_dout(LCD_D0, 0);
gpio_dout(LCD_D1, 0);
gpio_dout(LCD_D2, 0);
gpio_dout(LCD_D3, 0);
gpio_dout(LCD_D4, 0);
gpio_dout(LCD_D5, 0);
gpio_dout(LCD_D6, 0);
gpio_dout(LCD_D7, 0);
delay(50);
gpio_dout(LCD_RST, 0);
delay(15);
gpio_dout(LCD_RST, 1);
delay(15);
dsp_write_cmd(0x01); // soft reset
delay(50);
dsp_write_cmd(0xD0); // power setting
dsp_write_data(0x07);
dsp_write_data(0x42);
dsp_write_data(0x18);
dsp_write_cmd(0xD1); // vcom control
dsp_write_data(0x00);
dsp_write_data(0x07);
dsp_write_data(0x10);
dsp_write_cmd(0xD2); // power for normal mode
dsp_write_data(0x01);
dsp_write_data(0x02);
dsp_write_cmd(0xD3);
dsp_write_data(0x01);
dsp_write_data(0x02);
dsp_write_cmd(0xD4);
dsp_write_data(0x01);
dsp_write_data(0x02);
dsp_write_cmd(0xC0); // panel driving setting
dsp_write_data(0x10);
dsp_write_data(0x3B);
dsp_write_data(0x00);
dsp_write_data(0x02);
dsp_write_data(0x11);
dsp_write_cmd(0xC5); // frame rate/inversion ctl
dsp_write_data(0x03);
dsp_write_cmd(0x36); // rot. and stuff
dsp_write_data(0xA3);
dsp_write_cmd(0x3A); // set pixel format
dsp_write_data(0x55);
dsp_write_cmd(0x11);
delay(150);
dsp_write_cmd(0x29); // set display on
delay(150);
dsp_write_cmd(0x53);
dsp_write_data(0x2C);
//dsp_write_cmd(0x51);
//dsp_write_data(128);
/*dsp_write_cmd(0x33); // set scroll area
dsp_write_data(0x00);
dsp_write_data(0x00);
dsp_write_data(LCD_HEIGHT >> 8);
dsp_write_data((LCD_HEIGHT & 0xFF) - 1);
dsp_write_data(0x00);
dsp_write_data(0x00);
dsp_write_cmd(0x37);
dsp_write_data(0x00);
dsp_write_data(0x00);*/
}
void dsp_backlight(uint8_t value)
{
dsp_write_cmd(0x51);
dsp_write_data(value);
}
void dsp_sleep(void)
{
// backlight
dsp_backlight(0x00);
// display off
dsp_write_cmd(0x28);
// sleep mode
dsp_write_cmd(0x10);
delay(5);
}
void dsp_wakeup(void)
{
// unsleep
dsp_write_cmd(0x11);
//delay(5);
for (uint32_t i = 0; i < 20000; i++)
asm("");
// display on
dsp_write_cmd(0x29);
dsp_backlight(0xFF);
}
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