kopia lustrzana https://github.com/OpenRTX/OpenRTX
153 wiersze
5.4 KiB
C
153 wiersze
5.4 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/display.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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/*
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* LCD framebuffer, statically allocated and placed in the "large" RAM block
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* starting at 0x20000000.
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* Pixel format is black and white, one bit per pixel.
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*/
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#define FB_SIZE (((CONFIG_SCREEN_HEIGHT * CONFIG_SCREEN_WIDTH) / 8 ) + 1)
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static uint8_t __attribute__((section(".bss2"))) frameBuffer[FB_SIZE];
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void display_init()
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{
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/* Clear framebuffer, setting all pixels to 0x00 makes the screen white */
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memset(frameBuffer, 0x00, FB_SIZE);
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/*
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* Initialise SPI2 for external flash and LCD
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*/
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gpio_setMode(SPI2_CLK, ALTERNATE);
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gpio_setMode(SPI2_SDO, ALTERNATE);
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gpio_setMode(SPI2_SDI, ALTERNATE);
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gpio_setAlternateFunction(SPI2_CLK, 5); /* SPI2 is on AF5 */
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gpio_setAlternateFunction(SPI2_SDO, 5);
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gpio_setAlternateFunction(SPI2_SDI, 5);
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spi2_init();
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/*
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* Initialise GPIOs for LCD control
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*/
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gpio_setMode(LCD_CS, OUTPUT);
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gpio_setMode(LCD_RST, OUTPUT);
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gpio_setMode(LCD_RS, OUTPUT);
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gpio_setPin(LCD_CS);
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gpio_clearPin(LCD_RS);
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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_RS); /* RS 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 display_terminate()
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{
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spi2_terminate();
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}
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void display_renderRows(uint8_t startRow, uint8_t endRow)
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{
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gpio_clearPin(LCD_CS);
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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_RS); /* 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_RS); /* 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 display_render()
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{
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display_renderRows(0, CONFIG_SCREEN_HEIGHT);
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}
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void *display_getFrameBuffer()
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{
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return (void *)(frameBuffer);
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}
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void display_setContrast(uint8_t contrast)
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{
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gpio_clearPin(LCD_CS);
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gpio_clearPin(LCD_RS); /* 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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void display_setBacklightLevel(uint8_t level)
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{
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(void) level;
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}
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