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/**
* dogs.c - Interface for drawing to the EADOGS102N-6 display.
* Copyright (C) 2020 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.
* See the GNU General Public License for more details.
*/
#include "ch.h"
#include "dogs.h"
#include "hal.h"
#define SET_DATA palSetPad(GPIOC, 15)
#define SET_CMD palClearPad(GPIOC, 15)
#define CS_HIGH palSetPad(GPIOA, 4)
#define CS_LOW palClearPad(GPIOA, 4)
unsigned char dogs_buffer[DISP_WIDTH * DISP_HEIGHT / 8];
static void dogs_init_display();
void dogs_init()
{
// SPI
palSetPadMode(GPIOB, 1, PAL_MODE_ALTERNATE(1)); // MOSI
palSetPadMode(GPIOA, 5, PAL_MODE_ALTERNATE(0)); // CLK
palSetPadMode(GPIOA, 4, PAL_MODE_OUTPUT_PUSHPULL); // nCS
palSetPadMode(GPIOC, 14, PAL_MODE_OUTPUT_PUSHPULL); // nRST
palSetPadMode(GPIOC, 15, PAL_MODE_OUTPUT_PUSHPULL); // CD
palSetPad(GPIOA, 4);
palSetPad(GPIOC, 14);
palClearPad(GPIOC, 15);
static const SPIConfig ls_spicfg = {
false,
NULL,
SPI_CR1_BR_2 | SPI_CR1_BR_1,
0
};
spiStart(&SPID1, &ls_spicfg);
dogs_init_display();
dogs_clear();
}
void dogs_write_data(unsigned char byte)
{
SET_DATA;
spiSend(&SPID1, 1, &byte);
}
void dogs_write_cmd(unsigned char byte)
{
SET_CMD;
spiSend(&SPID1, 1, &byte);
}
void dogs_set_column(unsigned int col)
{
//if (col < DISP_WIDTH) {
dogs_write_cmd(0x10 | ((col >> 4) & 0xF));
dogs_write_cmd(0x00 | (col & 0xF));
//}
}
void dogs_set_power(unsigned int bits)
{
dogs_write_cmd(0x28 | (bits & 0x7));
}
void dogs_set_scroll_line(unsigned int startline)
{
dogs_write_cmd(0x40 | (startline & 0x3F));
}
void dogs_set_page(unsigned int page)
{
dogs_write_cmd(0xB0 | (page & 0xF));
}
void dogs_set_vlcd_ratio(unsigned int ratio)
{
dogs_write_cmd(0x20 | (ratio & 0x7));
}
void dogs_set_contrast(unsigned int value)
{
dogs_write_cmd(0x81);
dogs_write_cmd(0x00 | (value & 0x3F));
}
void dogs_set_pixelson(bool on)
{
dogs_write_cmd(on ? 0xA5 : 0xA4);
}
void dogs_set_invert(bool invert)
{
dogs_write_cmd(invert ? 0xA7 : 0xA6);
}
void dogs_set_sleep(bool sleep)
{
dogs_write_cmd(sleep ? 0xAE : 0xAF);
}
void dogs_set_segdir(bool normal)
{
dogs_write_cmd(normal ? 0xA0 : 0xA1);
}
void dogs_set_comdir(bool normal)
{
dogs_write_cmd(normal ? 0xC0 : 0xC8);
}
void dogs_reset()
{
dogs_write_cmd(0xE2);
}
void dogs_set_bias(bool higher)
{
dogs_write_cmd(higher ? 0xA2 : 0xA3);
}
void dogs_set_advanced(unsigned int bits)
{
dogs_write_cmd(0xFA);
dogs_write_cmd(0x10 | bits);
}
void dogs_init_display()
{
CS_LOW;
dogs_reset();
CS_HIGH;
chThdSleepMilliseconds(100);
CS_LOW;
dogs_set_scroll_line(0);
dogs_set_segdir(true);
dogs_set_comdir(false);
dogs_set_pixelson(false);
dogs_set_invert(false);
dogs_set_bias(true);
dogs_set_power(0x07);
dogs_set_vlcd_ratio(7);
dogs_set_contrast(0x10);
dogs_set_advanced(0x83);
dogs_set_sleep(false);
CS_HIGH;
}
void dogs_clear()
{
unsigned char *ptr = dogs_buffer;
for (unsigned int i = 0; i < sizeof(dogs_buffer); i++) {
*ptr++ = 0;
}
dogs_flush();
}
void dogs_flush()
{
unsigned char *ptr = dogs_buffer;
CS_LOW;
for (int page = 0; page < 8; page++) {
dogs_set_page(page);
dogs_set_column(30);
for (int i = 0; i < 102; i++)
dogs_write_data(*ptr++);
}
CS_HIGH;
}
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