128 lines
4.5 KiB
C
128 lines
4.5 KiB
C
/***************************************************************************
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* Copyright (C) 2021 - 2025 by Federico Amedeo Izzo IU2NUO, *
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* Niccolò Izzo IU2KIN *
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* Frederik Saraci IU2NRO *
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* Silvano Seva IU2KWO *
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* Mathis Schmieder DB9MAT *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, see <http://www.gnu.org/licenses/> *
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***************************************************************************/
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#include <stdio.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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#include "peripherals/gpio.h"
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#include "interfaces/delays.h"
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#include "hwconfig.h"
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#include "drivers/SPI/spi_stm32.h"
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#include "SH110x_Mod17.h"
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extern const struct spiDevice spi2;
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void SH110x_init()
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{
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gpio_setPin(LCD_CS);
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gpio_clearPin(LCD_DC);
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gpio_clearPin(LCD_RST); /* Reset controller */
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delayMs(50);
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gpio_setPin(LCD_RST);
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delayMs(50);
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static const uint8_t init[] =
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{
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0xAE, /* SH110X_DISPLAYOFF */
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0xD5, /* SH110X_SETDISPLAYCLOCKDIV, 0x51 */
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0x51,
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0x81, /* SH110X_SETCONTRAST, 0x4F */
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0x4F,
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0xAD, /* SH110X_DCDC, 0x8A */
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0x8A,
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0xA1, /* SH110X_SEGREMAP */
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0xC0, /* SH110X_COMSCANINC */
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0xDC, /* SH110X_SETDISPSTARTLINE, 0x0 */
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0x00,
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0xD3, /* SH110X_SETDISPLAYOFFSET, 0x60 */
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0x60,
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0xD9, /* SH110X_SETPRECHARGE, 0x22 */
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0x22,
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0xDB, /* SH110X_SETVCOMDETECT, 0x35 */
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0x35,
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0xA8, /* SH110X_SETMULTIPLEX, 0x3F */
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0x3F,
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0xA4, /* SH110X_DISPLAYALLON_RESUME */
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0xA6, /* SH110X_NORMALDISPLAY */
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0xAF /* SH110x_DISPLAYON */
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};
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gpio_clearPin(LCD_CS);
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gpio_clearPin(LCD_DC); /* DC low -> command mode */
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spi_send(&spi2, init, sizeof(init));
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gpio_setPin(LCD_CS);
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}
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void SH110x_terminate()
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{
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uint8_t dispOff = 0xAE;
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gpio_clearPin(LCD_CS);
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gpio_clearPin(LCD_DC); /* DC low -> command mode */
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spi_send(&spi2, &dispOff, 1);
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gpio_setPin(LCD_CS);
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}
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void SH110x_renderRows(uint8_t startRow, uint8_t endRow, void *fb)
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{
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gpio_clearPin(LCD_CS);
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uint8_t *frameBuffer = (uint8_t *) fb;
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for(uint8_t y = startRow; y < endRow; y++)
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{
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for(uint8_t x = 0; x < CONFIG_SCREEN_WIDTH/8; x++)
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{
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uint8_t cmd[3];
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cmd[0] = (y & 0x0F); /* Set Y position */
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cmd[1] = (0x10 | ((y >> 4) & 0x07));
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cmd[2] = (0xB0 | x); /* Set X position */
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gpio_clearPin(LCD_DC); /* RS low -> command mode */
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spi_send(&spi2, cmd, sizeof(cmd));
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gpio_setPin(LCD_DC); /* RS high -> data mode */
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size_t pos = x + y * (CONFIG_SCREEN_WIDTH/8);
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spi_send(&spi2, &frameBuffer[pos], 1);
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}
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}
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gpio_setPin(LCD_CS);
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}
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void SH110x_render(void *fb)
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{
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SH110x_renderRows(0, CONFIG_SCREEN_HEIGHT, fb);
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}
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void SH110x_setContrast(uint8_t contrast)
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{
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uint8_t cmd[2];
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cmd[0] = 0x81; /* Set Electronic Volume */
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cmd[0] = contrast; /* Controller contrast range is 0 - 63 */
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gpio_clearPin(LCD_CS);
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gpio_clearPin(LCD_DC); /* RS low -> command mode */
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spi_send(&spi2, cmd, sizeof(cmd));
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gpio_setPin(LCD_CS);
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}
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