369 lines
9.7 KiB
C
369 lines
9.7 KiB
C
/*
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* Copyright (c) 2017 Jan Van Winkel <jan.van_winkel@dxplore.eu>
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* Copyright (c) 2019 Nordic Semiconductor ASA
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* Copyright (c) 2019 Marc Reilly
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include "display_st7789v.h"
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#include <device.h>
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#include <drivers/spi.h>
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#include <drivers/gpio.h>
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#include <sys/byteorder.h>
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#include <drivers/display.h>
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#define LOG_LEVEL CONFIG_DISPLAY_LOG_LEVEL
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#include <logging/log.h>
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LOG_MODULE_REGISTER(display_st7789v);
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#define ST7789V_CS_PIN DT_INST_0_SITRONIX_ST7789V_CS_GPIOS_PIN
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#define ST7789V_CMD_DATA_PIN DT_INST_0_SITRONIX_ST7789V_CMD_DATA_GPIOS_PIN
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#define ST7789V_RESET_PIN DT_INST_0_SITRONIX_ST7789V_RESET_GPIOS_PIN
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struct st7789v_data {
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struct device *spi_dev;
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struct spi_config spi_config;
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#ifdef DT_INST_0_SITRONIX_ST7789V_CS_GPIOS_CONTROLLER
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struct spi_cs_control cs_ctrl;
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#endif
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#ifdef DT_INST_0_SITRONIX_ST7789V_RESET_GPIOS_CONTROLLER
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struct device *reset_gpio;
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#endif
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struct device *cmd_data_gpio;
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u16_t height;
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u16_t width;
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u16_t x_offset;
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u16_t y_offset;
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};
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#ifdef CONFIG_ST7789V_RGB565
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#define ST7789V_PIXEL_SIZE 2u
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#else
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#define ST7789V_PIXEL_SIZE 3u
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#endif
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static int st7789v_blanking_off(const struct device *dev);
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static int st7789v_blanking_on(const struct device *dev);
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void st7789v_set_lcd_margins(struct st7789v_data *data,
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u16_t x_offset, u16_t y_offset)
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{
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data->x_offset = x_offset;
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data->y_offset = y_offset;
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}
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static void st7789v_set_cmd(struct st7789v_data *data, int is_cmd)
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{
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gpio_pin_write(data->cmd_data_gpio, ST7789V_CMD_DATA_PIN, !is_cmd);
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}
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void st7789v_transmit(struct st7789v_data *data, u8_t cmd,
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u8_t *tx_data, size_t tx_count)
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{
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struct spi_buf tx_buf = { .buf = &cmd, .len = 1 };
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struct spi_buf_set tx_bufs = { .buffers = &tx_buf, .count = 1 };
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st7789v_set_cmd(data, true);
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spi_write(data->spi_dev, &data->spi_config, &tx_bufs);
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if (tx_data != NULL) {
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tx_buf.buf = tx_data;
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tx_buf.len = tx_count;
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st7789v_set_cmd(data, false);
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spi_write(data->spi_dev, &data->spi_config, &tx_bufs);
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}
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}
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static void st7789v_exit_sleep(struct st7789v_data *data)
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{
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st7789v_transmit(data, ST7789V_CMD_SLEEP_OUT, NULL, 0);
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k_sleep(120);
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}
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static void st7789v_reset_display(struct st7789v_data *data)
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{
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LOG_DBG("Resetting display");
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#ifdef DT_INST_0_SITRONIX_ST7789V_RESET_GPIOS_CONTROLLER
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gpio_pin_write(data->reset_gpio, ST7789V_RESET_PIN, 1);
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k_sleep(1);
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gpio_pin_write(data->reset_gpio, ST7789V_RESET_PIN, 0);
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k_sleep(6);
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gpio_pin_write(data->reset_gpio, ST7789V_RESET_PIN, 1);
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k_sleep(20);
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#else
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st7789v_transmit(p_st7789v, ST7789V_CMD_SW_RESET, NULL, 0);
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k_sleep(5);
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#endif
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}
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int st7789v_init(struct device *dev)
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{
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struct st7789v_data *data = (struct st7789v_data *)dev->driver_data;
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data->spi_dev = device_get_binding(DT_INST_0_SITRONIX_ST7789V_BUS_NAME);
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if (data->spi_dev == NULL) {
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LOG_ERR("Could not get SPI device for LCD");
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return -EPERM;
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}
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data->spi_config.frequency = DT_INST_0_SITRONIX_ST7789V_SPI_MAX_FREQUENCY;
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data->spi_config.operation = SPI_OP_MODE_MASTER | SPI_WORD_SET(8);
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data->spi_config.slave = DT_INST_0_SITRONIX_ST7789V_BASE_ADDRESS;
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#ifdef DT_INST_0_SITRONIX_ST7789V_CS_GPIOS_CONTROLLER
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data->cs_ctrl.gpio_dev =
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device_get_binding(DT_INST_0_SITRONIX_ST7789V_CS_GPIOS_CONTROLLER);
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data->cs_ctrl.gpio_pin = DT_INST_0_SITRONIX_ST7789V_CS_GPIOS_PIN;
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data->cs_ctrl.delay = 0U;
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data->spi_config.cs = &(data->cs_ctrl);
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#else
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data->spi_config.cs = NULL;
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#endif
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#ifdef DT_INST_0_SITRONIX_ST7789V_RESET_GPIOS_CONTROLLER
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data->reset_gpio =
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device_get_binding(DT_INST_0_SITRONIX_ST7789V_RESET_GPIOS_CONTROLLER);
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if (data->reset_gpio == NULL) {
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LOG_ERR("Could not get GPIO port for display reset");
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return -EPERM;
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}
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if (gpio_pin_configure(data->reset_gpio, ST7789V_RESET_PIN, GPIO_DIR_OUT)) {
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LOG_ERR("Couldn't configure reset pin");
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return -EIO;
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}
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#endif
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data->cmd_data_gpio =
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device_get_binding(DT_INST_0_SITRONIX_ST7789V_CMD_DATA_GPIOS_CONTROLLER);
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if (data->cmd_data_gpio == NULL) {
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LOG_ERR("Could not get GPIO port for cmd/DATA port");
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return -EPERM;
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}
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if (gpio_pin_configure(data->cmd_data_gpio, ST7789V_CMD_DATA_PIN,
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GPIO_DIR_OUT)) {
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LOG_ERR("Couldn't configure cmd/DATA pin");
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return -EIO;
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}
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data->width = 240;
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data->height = 320;
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data->x_offset = 0;
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data->y_offset = 0;
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#ifdef DT_INST_0_SITRONIX_ST7789V_WIDTH
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data->width = DT_INST_0_SITRONIX_ST7789V_WIDTH;
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#endif
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#ifdef DT_INST_0_SITRONIX_ST7789V_HEIGHT
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data->height = DT_INST_0_SITRONIX_ST7789V_HEIGHT;
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#endif
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st7789v_reset_display(data);
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st7789v_blanking_on(dev);
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st7789v_lcd_init(data);
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st7789v_exit_sleep(data);
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return 0;
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}
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int st7789v_cmd_read8(struct st7789v_data *data, int cmd, u8_t *pRet)
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{
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u8_t sendbuff[4];
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sendbuff[0] = cmd;
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const struct spi_buf tx_buf[2] = {
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{ .buf = sendbuff, .len = 1 },
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{ .buf = 0, .len = 1 },
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};
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const struct spi_buf rx_buf[2] = {
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{ .buf = 0, .len = 1 },
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{ .buf = pRet, .len = 1 }
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};
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struct spi_buf_set tx_bufs = { .buffers = tx_buf, .count = 2 };
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struct spi_buf_set rx_bufs = { .buffers = rx_buf, .count = 2 };
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st7789v_set_cmd(data, 1);
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int ret = spi_transceive(data->spi_dev, &data->spi_config, &tx_bufs,
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&rx_bufs);
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st7789v_set_cmd(data, 0);
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return ret;
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}
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static int st7789v_blanking_on(const struct device *dev)
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{
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struct st7789v_data *driver = (struct st7789v_data *)dev->driver_data;
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st7789v_transmit(driver, ST7789V_CMD_DISP_OFF, NULL, 0);
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return 0;
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}
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static int st7789v_blanking_off(const struct device *dev)
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{
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struct st7789v_data *driver = (struct st7789v_data *)dev->driver_data;
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st7789v_transmit(driver, ST7789V_CMD_DISP_ON, NULL, 0);
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return 0;
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}
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static int st7789v_read(const struct device *dev,
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const u16_t x,
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const u16_t y,
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const struct display_buffer_descriptor *desc,
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void *buf)
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{
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return -ENOTSUP;
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}
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static void st7789v_set_mem_area(struct st7789v_data *data, const u16_t x,
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const u16_t y, const u16_t w, const u16_t h)
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{
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u16_t spi_data[2];
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u16_t ram_x = x + data->x_offset;
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u16_t ram_y = y + data->y_offset;
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spi_data[0] = sys_cpu_to_be16(ram_x);
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spi_data[1] = sys_cpu_to_be16(ram_x + w - 1);
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st7789v_transmit(data, ST7789V_CMD_CASET, (u8_t *)&spi_data[0], 4);
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spi_data[0] = sys_cpu_to_be16(ram_y);
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spi_data[1] = sys_cpu_to_be16(ram_y + h - 1);
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st7789v_transmit(data, ST7789V_CMD_RASET, (u8_t *)&spi_data[0], 4);
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}
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static int st7789v_write(const struct device *dev,
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const u16_t x,
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const u16_t y,
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const struct display_buffer_descriptor *desc,
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const void *buf)
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{
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struct st7789v_data *data = (struct st7789v_data *)dev->driver_data;
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const u8_t *write_data_start = (u8_t *) buf;
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struct spi_buf tx_buf;
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struct spi_buf_set tx_bufs;
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u16_t write_cnt;
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u16_t nbr_of_writes;
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u16_t write_h;
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__ASSERT(desc->width <= desc->pitch, "Pitch is smaller then width");
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__ASSERT((desc->pitch * ST7789V_PIXEL_SIZE * desc->height) <= desc->buf_size,
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"Input buffer to small");
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LOG_DBG("Writing %dx%d (w,h) @ %dx%d (x,y)",
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desc->width, desc->height, x, y);
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st7789v_set_mem_area(data, x, y, desc->width, desc->height);
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if (desc->pitch > desc->width) {
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write_h = 1U;
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nbr_of_writes = desc->height;
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} else {
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write_h = desc->height;
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nbr_of_writes = 1U;
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}
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st7789v_transmit(data, ST7789V_CMD_RAMWR,
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(void *) write_data_start,
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desc->width * ST7789V_PIXEL_SIZE * write_h);
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tx_bufs.buffers = &tx_buf;
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tx_bufs.count = 1;
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write_data_start += (desc->pitch * ST7789V_PIXEL_SIZE);
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for (write_cnt = 1U; write_cnt < nbr_of_writes; ++write_cnt) {
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tx_buf.buf = (void *)write_data_start;
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tx_buf.len = desc->width * ST7789V_PIXEL_SIZE * write_h;
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spi_write(data->spi_dev, &data->spi_config, &tx_bufs);
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write_data_start += (desc->pitch * ST7789V_PIXEL_SIZE);
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}
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return 0;
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}
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void *st7789v_get_framebuffer(const struct device *dev)
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{
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return NULL;
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}
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int st7789v_set_brightness(const struct device *dev,
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const u8_t brightness)
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{
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return -ENOTSUP;
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}
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int st7789v_set_contrast(const struct device *dev,
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const u8_t contrast)
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{
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return -ENOTSUP;
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}
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void st7789v_get_capabilities(const struct device *dev,
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struct display_capabilities *capabilities)
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{
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struct st7789v_data *data = (struct st7789v_data *)dev->driver_data;
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memset(capabilities, 0, sizeof(struct display_capabilities));
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capabilities->x_resolution = data->width;
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capabilities->y_resolution = data->height;
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#ifdef CONFIG_ST7789V_RGB565
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capabilities->supported_pixel_formats = PIXEL_FORMAT_RGB_565;
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capabilities->current_pixel_format = PIXEL_FORMAT_RGB_565;
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#else
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capabilities->supported_pixel_formats = PIXEL_FORMAT_RGB_888;
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capabilities->current_pixel_format = PIXEL_FORMAT_RGB_888;
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#endif
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capabilities->current_orientation = DISPLAY_ORIENTATION_NORMAL;
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}
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int st7789v_set_pixel_format(const struct device *dev,
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const enum display_pixel_format pixel_format)
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{
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#ifdef CONFIG_ST7789V_RGB565
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if (pixel_format == PIXEL_FORMAT_RGB_565) {
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#else
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if (pixel_format == PIXEL_FORMAT_RGB_888) {
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#endif
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return 0;
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}
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LOG_ERR("Pixel format change not implemented");
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return -ENOTSUP;
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}
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int st7789v_set_orientation(const struct device *dev,
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const enum display_orientation orientation)
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{
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if (orientation == DISPLAY_ORIENTATION_NORMAL) {
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return 0;
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}
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LOG_ERR("Changing display orientation not implemented");
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return -ENOTSUP;
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}
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static const struct display_driver_api st7789v_api = {
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.blanking_on = st7789v_blanking_on,
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.blanking_off = st7789v_blanking_off,
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.write = st7789v_write,
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.read = st7789v_read,
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.get_framebuffer = st7789v_get_framebuffer,
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.set_brightness = st7789v_set_brightness,
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.set_contrast = st7789v_set_contrast,
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.get_capabilities = st7789v_get_capabilities,
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.set_pixel_format = st7789v_set_pixel_format,
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.set_orientation = st7789v_set_orientation,
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};
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static struct st7789v_data st7789v_data;
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DEVICE_AND_API_INIT(st7789v, DT_INST_0_SITRONIX_ST7789V_LABEL, &st7789v_init,
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&st7789v_data, NULL, APPLICATION,
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CONFIG_APPLICATION_INIT_PRIORITY, &st7789v_api);
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