113 lines
4.4 KiB
C
113 lines
4.4 KiB
C
/***************************************************************************
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* Copyright (C) 2021 - 2023 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 <SPI2.h>
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#include "SH110x_Mod17.h"
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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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gpio_clearPin(LCD_CS);
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gpio_clearPin(LCD_DC); /* DC low -> command mode */
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spi2_sendRecv(0xAE); /* SH110X_DISPLAYOFF */
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spi2_sendRecv(0xD5); /* SH110X_SETDISPLAYCLOCKDIV, 0x51 */
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spi2_sendRecv(0x51);
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spi2_sendRecv(0x81); /* SH110X_SETCONTRAST, 0x4F */
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spi2_sendRecv(0x4F);
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spi2_sendRecv(0xAD); /* SH110X_DCDC, 0x8A */
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spi2_sendRecv(0x8A);
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spi2_sendRecv(0xA1); /* SH110X_SEGREMAP */
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spi2_sendRecv(0xC0); /* SH110X_COMSCANINC */
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spi2_sendRecv(0xDC); /* SH110X_SETDISPSTARTLINE, 0x0 */
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spi2_sendRecv(0x00);
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spi2_sendRecv(0xD3); /* SH110X_SETDISPLAYOFFSET, 0x60 */
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spi2_sendRecv(0x60);
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spi2_sendRecv(0xD9); /* SH110X_SETPRECHARGE, 0x22 */
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spi2_sendRecv(0x22);
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spi2_sendRecv(0xDB); /* SH110X_SETVCOMDETECT, 0x35 */
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spi2_sendRecv(0x35);
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spi2_sendRecv(0xA8); /* SH110X_SETMULTIPLEX, 0x3F */
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spi2_sendRecv(0x3F);
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spi2_sendRecv(0xA4); /* SH110X_DISPLAYALLON_RESUME */
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spi2_sendRecv(0xA6); /* SH110X_NORMALDISPLAY */
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spi2_sendRecv(0xAF); /* SH110x_DISPLAYON */
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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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spi2_sendRecv(0xAE);
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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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gpio_clearPin(LCD_DC); /* RS low -> command mode */
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(void) spi2_sendRecv(y & 0x0F); /* Set Y position */
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(void) spi2_sendRecv(0x10 | ((y >> 4) & 0x07));
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(void) spi2_sendRecv(0xB0 | x); /* Set X position */
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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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spi2_sendRecv(frameBuffer[pos]);
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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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gpio_clearPin(LCD_CS);
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gpio_clearPin(LCD_DC); /* RS low -> command mode */
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(void) spi2_sendRecv(0x81); /* Set Electronic Volume */
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(void) spi2_sendRecv(contrast); /* Controller contrast range is 0 - 63 */
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gpio_setPin(LCD_CS);
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}
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