142 lines
4.5 KiB
C
142 lines
4.5 KiB
C
/***************************************************************************
|
|
* Copyright (C) 2021 - 2025 by Federico Amedeo Izzo IU2NUO, *
|
|
* Niccolò Izzo IU2KIN *
|
|
* Frederik Saraci IU2NRO *
|
|
* Silvano Seva IU2KWO *
|
|
* Mathis Schmieder DB9MAT *
|
|
* *
|
|
* 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 <http://www.gnu.org/licenses/> *
|
|
***************************************************************************/
|
|
|
|
#include <stdio.h>
|
|
#include <stddef.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include "peripherals/gpio.h"
|
|
#include "interfaces/display.h"
|
|
#include "interfaces/delays.h"
|
|
#include "hwconfig.h"
|
|
#include "drivers/SPI/spi_stm32.h"
|
|
|
|
extern const struct spiDevice spi2;
|
|
|
|
/**
|
|
* \internal
|
|
* Send one row of pixels to the display.
|
|
* Pixels in framebuffer are stored "by rows", while display needs data to be
|
|
* sent "by columns": this function performs the needed conversion.
|
|
*
|
|
* @param row: pixel row to be be sent.
|
|
*/
|
|
void SSD1306_renderRow(uint8_t row, uint8_t *frameBuffer)
|
|
{
|
|
for(uint16_t i = 0; i < 64; i++)
|
|
{
|
|
uint8_t out = 0;
|
|
uint8_t tmp = frameBuffer[(i * 16) + (15 - row)];
|
|
|
|
for(uint8_t j = 0; j < 8; j++)
|
|
{
|
|
out |= ((tmp >> (7-j)) & 0x01) << j;
|
|
}
|
|
|
|
spi_send(&spi2, &out, 1);
|
|
}
|
|
}
|
|
|
|
|
|
void SSD1306_init()
|
|
{
|
|
gpio_setPin(LCD_CS);
|
|
gpio_clearPin(LCD_RS);
|
|
|
|
gpio_clearPin(LCD_RST); // Reset controller
|
|
delayMs(50);
|
|
gpio_setPin(LCD_RST);
|
|
delayMs(50);
|
|
|
|
static const uint8_t init[] =
|
|
{
|
|
0xAE, // SH110X_DISPLAYOFF
|
|
0xD5, // SH110X_SETDISPLAYCLOCKDIV, 0x51
|
|
0x51,
|
|
0x81, // SH110X_SETCONTRAST, 0x4F
|
|
0x4F,
|
|
0xAD, // SH110X_DCDC, 0x8A
|
|
0x8A,
|
|
0xA0, // SH110X_SEGREMAP
|
|
0xC0, // SH110X_COMSCANINC
|
|
0xDC, // SH110X_SETDISPSTARTLINE, 0x0
|
|
0x00,
|
|
0xD3, // SH110X_SETDISPLAYOFFSET, 0x60
|
|
0x60,
|
|
0xD9, // SH110X_SETPRECHARGE, 0x22
|
|
0x22,
|
|
0xDB, // SH110X_SETVCOMDETECT, 0x35
|
|
0x35,
|
|
0xA8, // SH110X_SETMULTIPLEX, 0x3F
|
|
0x3F,
|
|
0xA4, // SH110X_DISPLAYALLON_RESUME
|
|
0xA6, // SH110X_NORMALDISPLAY
|
|
0xAF // SH110x_DISPLAYON
|
|
};
|
|
|
|
gpio_clearPin(LCD_CS);
|
|
gpio_clearPin(LCD_DC);
|
|
spi_send(&spi2, init, sizeof(init));
|
|
gpio_setPin(LCD_CS);
|
|
}
|
|
|
|
void SSD1306_terminate()
|
|
{
|
|
|
|
}
|
|
|
|
void SSD1306_renderRows(uint8_t startRow, uint8_t endRow, void *fb)
|
|
{
|
|
gpio_clearPin(LCD_CS);
|
|
|
|
for(uint8_t row = startRow; row <= endRow; row++)
|
|
{
|
|
uint8_t cmd[3];
|
|
cmd[0] = 0xB0 | row; /* Set Y position */
|
|
cmd[1] = 0x00; /* Set X position */
|
|
cmd[2] = 0x10;
|
|
|
|
gpio_clearPin(LCD_RS); /* RS low -> command mode */
|
|
spi_send(&spi2, cmd, sizeof(cmd));
|
|
gpio_setPin(LCD_RS); /* RS high -> data mode */
|
|
SSD1306_renderRow(row, (uint8_t *) fb);
|
|
}
|
|
|
|
gpio_setPin(LCD_CS);
|
|
}
|
|
|
|
void SSD1306_render(void *fb)
|
|
{
|
|
SSD1306_renderRows(0, (CONFIG_SCREEN_WIDTH / 8) - 1, fb);
|
|
}
|
|
|
|
void SSD1306_setContrast(uint8_t contrast)
|
|
{
|
|
uint8_t cmd[2];
|
|
cmd[0] = 0x81; /* Set Electronic Volume */
|
|
cmd[0] = contrast; /* Controller contrast range is 0 - 63 */
|
|
|
|
gpio_clearPin(LCD_CS);
|
|
gpio_clearPin(LCD_DC); /* RS low -> command mode */
|
|
spi_send(&spi2, cmd, sizeof(cmd));
|
|
gpio_setPin(LCD_CS);
|
|
}
|