147 lines
4.3 KiB
C
147 lines
4.3 KiB
C
/****************************************************************************
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* boards/xtensa/esp32/common/src/esp32_st7789.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdio.h>
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#include <stdbool.h>
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#include <debug.h>
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#include <errno.h>
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#include <nuttx/arch.h>
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#include <nuttx/board.h>
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#include <nuttx/spi/spi.h>
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#include <nuttx/lcd/lcd.h>
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#include <nuttx/lcd/st7789.h>
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#include <arch/board/board.h>
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#include "esp32_spi.h"
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#include "esp32_gpio.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#ifndef CONFIG_SPI_CMDDATA
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# error "The ST7789 driver requires CONFIG_SPI_CMDATA in the config"
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#endif
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#ifndef CONFIG_ESP32_SPI_SWCS
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# error "The ST7789 driver requires CONFIG_ESP32_SPI_SWCS in the config"
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#endif
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static struct spi_dev_s *g_spidev;
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static struct lcd_dev_s *g_lcd = NULL;
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: board_lcd_initialize
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*
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* Description:
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* Initialize the LCD video hardware. The initial state of the LCD is
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* fully initialized, display memory cleared, and the LCD ready to use, but
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* with the power setting at 0 (full off).
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*
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****************************************************************************/
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int board_lcd_initialize(void)
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{
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g_spidev = esp32_spibus_initialize(DISPLAY_SPI);
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if (!g_spidev)
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{
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lcderr("ERROR: Failed to initialize SPI port %d\n", DISPLAY_SPI);
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return -ENODEV;
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}
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/* SPI RX is not used. Same pin is used as LCD Data/Command control */
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esp32_configgpio(DISPLAY_DC, OUTPUT);
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esp32_gpiowrite(DISPLAY_DC, true);
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/* Pull LCD_RESET high */
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esp32_configgpio(DISPLAY_RST, OUTPUT);
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esp32_gpiowrite(DISPLAY_RST, false);
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up_mdelay(1);
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esp32_gpiowrite(DISPLAY_RST, true);
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up_mdelay(10);
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/* Set full brightness */
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esp32_configgpio(DISPLAY_BCKL, OUTPUT);
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esp32_gpiowrite(DISPLAY_BCKL, true);
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lcdinfo("LCD successfully initialized");
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return OK;
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}
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/****************************************************************************
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* Name: board_lcd_getdev
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*
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* Description:
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* Return a a reference to the LCD object for the specified LCD. This
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* allows support for multiple LCD devices.
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*
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****************************************************************************/
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struct lcd_dev_s *board_lcd_getdev(int devno)
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{
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g_lcd = st7789_lcdinitialize(g_spidev);
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if (g_lcd == NULL)
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{
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lcderr("ERROR: Failed to bind SPI port %d to LCD %d\n", DISPLAY_SPI,
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devno);
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return NULL;
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}
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lcdinfo("SPI port %d bound to LCD %d\n", DISPLAY_SPI, devno);
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return g_lcd;
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}
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/****************************************************************************
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* Name: board_lcd_uninitialize
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*
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* Description:
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* Uninitialize the LCD support
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*
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****************************************************************************/
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void board_lcd_uninitialize(void)
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{
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/* Turn the display off */
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g_lcd->setpower(g_lcd, 0);
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}
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