/* * SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: CC0-1.0 */ #include #include "freertos/FreeRTOS.h" #include "freertos/task.h" #include "esp_timer.h" #include "esp_lcd_panel_io.h" #include "esp_lcd_panel_vendor.h" #include "esp_lcd_panel_ops.h" #include "driver/gpio.h" #include "driver/spi_master.h" #include "esp_err.h" #include "esp_log.h" #include "lvgl.h" #if CONFIG_EXAMPLE_LCD_CONTROLLER_ST7789 //#include "esp_lcd_st7789.h" #elif CONFIG_EXAMPLE_LCD_CONTROLLER_GC9B71 #include "esp_lcd_panel_gc9b71.h" #endif #if CONFIG_EXAMPLE_LCD_TOUCH_ENABLED #include "driver/i2c.h" #if CONFIG_EXAMPLE_LCD_TOUCH_CONTROLLER_CST816 #include "esp_lcd_touch_cst816s.h" #endif #endif static const char *TAG = "example"; // Using SPI2 in the example #define LCD_HOST SPI2_HOST #if CONFIG_EXAMPLE_LCD_TOUCH_ENABLED #define EXAMPLE_I2C_NUM 0 // I2C number #define EXAMPLE_I2C_SCL 2 #define EXAMPLE_I2C_SDA 3 #endif //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// //////////////////// Please update the following configuration according to your LCD spec ////////////////////////////// //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// #define EXAMPLE_LCD_PIXEL_CLOCK_HZ (20 * 1000 * 1000) #define EXAMPLE_LCD_BK_LIGHT_ON_LEVEL 1 #define EXAMPLE_LCD_BK_LIGHT_OFF_LEVEL !EXAMPLE_LCD_BK_LIGHT_ON_LEVEL #define EXAMPLE_PIN_NUM_SCLK 14 #if CONFIG_EXAMPLE_LCD_CONTROLLER_ST7789 #define EXAMPLE_PIN_NUM_MOSI 21 //#define EXAMPLE_PIN_NUM_MISO -1 #define EXAMPLE_PIN_NUM_LCD_DC 12 #elif CONFIG_EXAMPLE_LCD_CONTROLLER_GC9B71 #define EXAMPLE_PIN_NUM_D0 21 #define EXAMPLE_PIN_NUM_D1 12 #define EXAMPLE_PIN_NUM_D2 19 #define EXAMPLE_PIN_NUM_D3 20 #endif #define EXAMPLE_PIN_NUM_LCD_RST 13 #define EXAMPLE_PIN_NUM_LCD_CS 9 #define EXAMPLE_PIN_NUM_BK_LIGHT 46 #define EXAMPLE_PIN_NUM_TP_RST 10 #define EXAMPLE_PIN_NUM_TP_INT 11 // The pixel number in horizontal and vertical #if CONFIG_EXAMPLE_LCD_CONTROLLER_ST7789 #define EXAMPLE_LCD_H_RES 240 #define EXAMPLE_LCD_V_RES 300 #elif CONFIG_EXAMPLE_LCD_CONTROLLER_GC9B71 #define EXAMPLE_LCD_H_RES 320 #define EXAMPLE_LCD_V_RES 384 #endif // Bit number used to represent command and parameter #define EXAMPLE_LCD_CMD_BITS 8 #define EXAMPLE_LCD_PARAM_BITS 8 #define EXAMPLE_LVGL_TICK_PERIOD_MS 2 #if CONFIG_EXAMPLE_LCD_TOUCH_ENABLED esp_lcd_touch_handle_t tp = NULL; #endif extern void example_lvgl_demo_ui(lv_disp_t *disp); static bool example_notify_lvgl_flush_ready(esp_lcd_panel_io_handle_t panel_io, esp_lcd_panel_io_event_data_t *edata, void *user_ctx) { lv_disp_drv_t *disp_driver = (lv_disp_drv_t *)user_ctx; lv_disp_flush_ready(disp_driver); return false; } static void example_lvgl_flush_cb(lv_disp_drv_t *drv, const lv_area_t *area, lv_color_t *color_map) { esp_lcd_panel_handle_t panel_handle = (esp_lcd_panel_handle_t) drv->user_data; int offsetx1 = area->x1; int offsetx2 = area->x2; int offsety1 = area->y1; int offsety2 = area->y2; // copy a buffer's content to a specific area of the display esp_lcd_panel_draw_bitmap(panel_handle, offsetx1, offsety1, offsetx2 + 1, offsety2 + 1, color_map); } /* Rotate display and touch, when rotated screen in LVGL. Called when driver parameters are updated. */ static void example_lvgl_port_update_callback(lv_disp_drv_t *drv) { esp_lcd_panel_handle_t panel_handle = (esp_lcd_panel_handle_t) drv->user_data; switch (drv->rotated) { case LV_DISP_ROT_NONE: // Rotate LCD display esp_lcd_panel_swap_xy(panel_handle, false); esp_lcd_panel_mirror(panel_handle, true, false); #if CONFIG_EXAMPLE_LCD_TOUCH_ENABLED // Rotate LCD touch esp_lcd_touch_set_mirror_y(tp, false); esp_lcd_touch_set_mirror_x(tp, false); #endif break; case LV_DISP_ROT_90: // Rotate LCD display esp_lcd_panel_swap_xy(panel_handle, true); esp_lcd_panel_mirror(panel_handle, true, true); #if CONFIG_EXAMPLE_LCD_TOUCH_ENABLED // Rotate LCD touch esp_lcd_touch_set_mirror_y(tp, false); esp_lcd_touch_set_mirror_x(tp, false); #endif break; case LV_DISP_ROT_180: // Rotate LCD display esp_lcd_panel_swap_xy(panel_handle, false); esp_lcd_panel_mirror(panel_handle, false, true); #if CONFIG_EXAMPLE_LCD_TOUCH_ENABLED // Rotate LCD touch esp_lcd_touch_set_mirror_y(tp, false); esp_lcd_touch_set_mirror_x(tp, false); #endif break; case LV_DISP_ROT_270: // Rotate LCD display esp_lcd_panel_swap_xy(panel_handle, true); esp_lcd_panel_mirror(panel_handle, false, false); #if CONFIG_EXAMPLE_LCD_TOUCH_ENABLED // Rotate LCD touch esp_lcd_touch_set_mirror_y(tp, false); esp_lcd_touch_set_mirror_x(tp, false); #endif break; } } #if CONFIG_EXAMPLE_LCD_TOUCH_ENABLED static void example_lvgl_touch_cb(lv_indev_drv_t * drv, lv_indev_data_t * data) { uint16_t touchpad_x[1] = {0}; uint16_t touchpad_y[1] = {0}; uint8_t touchpad_cnt = 0; /* Read touch controller data */ esp_lcd_touch_read_data(drv->user_data); /* Get coordinates */ bool touchpad_pressed = esp_lcd_touch_get_coordinates(drv->user_data, touchpad_x, touchpad_y, NULL, &touchpad_cnt, 1); if (touchpad_pressed && touchpad_cnt > 0) { ESP_LOGI(TAG, "Touch x=%x,y=%x ", touchpad_x[0], touchpad_y[0]); data->point.x = touchpad_x[0]; data->point.y = touchpad_y[0]; data->state = LV_INDEV_STATE_PRESSED; } else { data->state = LV_INDEV_STATE_RELEASED; } } #endif static void example_increase_lvgl_tick(void *arg) { /* Tell LVGL how many milliseconds has elapsed */ lv_tick_inc(EXAMPLE_LVGL_TICK_PERIOD_MS); } void app_main(void) { static lv_disp_draw_buf_t disp_buf; // contains internal graphic buffer(s) called draw buffer(s) static lv_disp_drv_t disp_drv; // contains callback functions ESP_LOGI(TAG, "Turn off LCD backlight"); gpio_config_t bk_gpio_config = { .mode = GPIO_MODE_OUTPUT, .pin_bit_mask = 1ULL << EXAMPLE_PIN_NUM_BK_LIGHT }; ESP_ERROR_CHECK(gpio_config(&bk_gpio_config)); ESP_LOGI(TAG, "Initialize SPI bus"); #if CONFIG_EXAMPLE_LCD_CONTROLLER_ST7789 spi_bus_config_t buscfg = { .sclk_io_num = EXAMPLE_PIN_NUM_SCLK, .mosi_io_num = EXAMPLE_PIN_NUM_MOSI, .miso_io_num = -1, .quadwp_io_num = -1, .quadhd_io_num = -1, .max_transfer_sz = EXAMPLE_LCD_H_RES * 80 * sizeof(uint16_t), }; ESP_ERROR_CHECK(spi_bus_initialize(LCD_HOST, &buscfg, SPI_DMA_CH_AUTO)); ESP_LOGI(TAG, "Install panel IO"); esp_lcd_panel_io_handle_t io_handle = NULL; esp_lcd_panel_io_spi_config_t io_config = { .dc_gpio_num = EXAMPLE_PIN_NUM_LCD_DC, .cs_gpio_num = EXAMPLE_PIN_NUM_LCD_CS, .pclk_hz = EXAMPLE_LCD_PIXEL_CLOCK_HZ, .lcd_cmd_bits = EXAMPLE_LCD_CMD_BITS, .lcd_param_bits = EXAMPLE_LCD_PARAM_BITS, .spi_mode = 0, .trans_queue_depth = 10, .on_color_trans_done = example_notify_lvgl_flush_ready, .user_ctx = &disp_drv, }; #elif CONFIG_EXAMPLE_LCD_CONTROLLER_GC9B71 spi_bus_config_t buscfg = { .sclk_io_num = EXAMPLE_PIN_NUM_SCLK, .mosi_io_num = EXAMPLE_PIN_NUM_D0, .miso_io_num = EXAMPLE_PIN_NUM_D1, .quadwp_io_num = EXAMPLE_PIN_NUM_D2, .quadhd_io_num = EXAMPLE_PIN_NUM_D3, .max_transfer_sz = EXAMPLE_LCD_H_RES * 80 * sizeof(uint16_t), }; ESP_ERROR_CHECK(spi_bus_initialize(LCD_HOST, &buscfg, SPI_DMA_CH_AUTO)); ESP_LOGI(TAG, "Install panel IO"); esp_lcd_panel_io_handle_t io_handle = NULL; esp_lcd_panel_io_spi_config_t io_config = { .dc_gpio_num = -1, .cs_gpio_num = EXAMPLE_PIN_NUM_LCD_CS, .pclk_hz = EXAMPLE_LCD_PIXEL_CLOCK_HZ, .lcd_cmd_bits = EXAMPLE_LCD_CMD_BITS, .lcd_param_bits = EXAMPLE_LCD_PARAM_BITS, .spi_mode = 0, .trans_queue_depth = 10, .on_color_trans_done = example_notify_lvgl_flush_ready, .user_ctx = &disp_drv, }; #endif // Attach the LCD to the SPI bus ESP_ERROR_CHECK(esp_lcd_new_panel_io_spi((esp_lcd_spi_bus_handle_t)LCD_HOST, &io_config, &io_handle)); esp_lcd_panel_handle_t panel_handle = NULL; esp_lcd_panel_dev_config_t panel_config = { .reset_gpio_num = EXAMPLE_PIN_NUM_LCD_RST, .rgb_endian = LCD_RGB_ENDIAN_BGR, .bits_per_pixel = 16, }; #if CONFIG_EXAMPLE_LCD_CONTROLLER_ST7789 ESP_LOGI(TAG, "Install ST7789 panel driver"); ESP_ERROR_CHECK(esp_lcd_new_panel_st7789(io_handle, &panel_config, &panel_handle)); #elif CONFIG_EXAMPLE_LCD_CONTROLLER_GC9B71 ESP_LOGI(TAG, "Install GC9B71 panel driver"); ESP_ERROR_CHECK(esp_lcd_new_panel_gc9b71(io_handle, &panel_config, &panel_handle)); #endif ESP_ERROR_CHECK(esp_lcd_panel_reset(panel_handle)); ESP_ERROR_CHECK(esp_lcd_panel_init(panel_handle)); #if CONFIG_EXAMPLE_LCD_CONTROLLER_GC9B71 // ESP_ERROR_CHECK(esp_lcd_panel_invert_color(panel_handle, true)); #endif ESP_ERROR_CHECK(esp_lcd_panel_mirror(panel_handle, true, false)); // user can flush pre-defined pattern to the screen before we turn on the screen or backlight ESP_ERROR_CHECK(esp_lcd_panel_disp_on_off(panel_handle, true)); #if CONFIG_EXAMPLE_LCD_TOUCH_ENABLED esp_lcd_touch_handle_t tp = NULL; esp_lcd_panel_io_handle_t tp_io_handle = NULL; ESP_LOGI(TAG, "Initialize I2C"); const i2c_config_t i2c_conf = { .mode = I2C_MODE_MASTER, .sda_io_num = EXAMPLE_I2C_SDA, .scl_io_num = EXAMPLE_I2C_SCL, .sda_pullup_en = GPIO_PULLUP_ENABLE, .scl_pullup_en = GPIO_PULLUP_ENABLE, .master.clk_speed = 400000, }; /* Initialize I2C */ ESP_ERROR_CHECK(i2c_param_config(EXAMPLE_I2C_NUM, &i2c_conf)); ESP_ERROR_CHECK(i2c_driver_install(EXAMPLE_I2C_NUM, i2c_conf.mode, 0, 0, 0)); #if CONFIG_EXAMPLE_LCD_TOUCH_CONTROLLER_CST816 esp_lcd_panel_io_i2c_config_t tp_io_config = ESP_LCD_TOUCH_IO_I2C_CST816S_CONFIG(); #endif ESP_LOGI(TAG, "Initialize touch IO (I2C)"); /* Touch IO handle */ ESP_ERROR_CHECK(esp_lcd_new_panel_io_i2c((esp_lcd_i2c_bus_handle_t)EXAMPLE_I2C_NUM, &tp_io_config, &tp_io_handle)); esp_lcd_touch_config_t tp_cfg = { .x_max = EXAMPLE_LCD_V_RES, .y_max = EXAMPLE_LCD_H_RES, .rst_gpio_num = EXAMPLE_PIN_NUM_TP_RST , .int_gpio_num = EXAMPLE_PIN_NUM_TP_INT , .flags = { .swap_xy = 1, .mirror_x = 1, .mirror_y = 0, }, }; /* Initialize touch */ #if CONFIG_EXAMPLE_LCD_TOUCH_CONTROLLER_CST816 ESP_LOGI(TAG, "Initialize touch controller CST816"); ESP_ERROR_CHECK(esp_lcd_touch_new_i2c_cst816s(tp_io_handle, &tp_cfg, &tp)); #endif // CONFIG_EXAMPLE_LCD_TOUCH_CONTROLLER_CST816 #endif // CONFIG_EXAMPLE_LCD_TOUCH_ENABLED ESP_LOGI(TAG, "Turn on LCD backlight"); gpio_set_level(EXAMPLE_PIN_NUM_BK_LIGHT, EXAMPLE_LCD_BK_LIGHT_ON_LEVEL); ESP_LOGI(TAG, "Initialize LVGL library"); lv_init(); // alloc draw buffers used by LVGL // it's recommended to choose the size of the draw buffer(s) to be at least 1/10 screen sized lv_color_t *buf1 = heap_caps_malloc(EXAMPLE_LCD_H_RES * 20 * sizeof(lv_color_t), MALLOC_CAP_DMA); assert(buf1); lv_color_t *buf2 = heap_caps_malloc(EXAMPLE_LCD_H_RES * 20 * sizeof(lv_color_t), MALLOC_CAP_DMA); assert(buf2); // initialize LVGL draw buffers lv_disp_draw_buf_init(&disp_buf, buf1, buf2, EXAMPLE_LCD_H_RES * 20); ESP_LOGI(TAG, "Register display driver to LVGL"); lv_disp_drv_init(&disp_drv); disp_drv.hor_res = EXAMPLE_LCD_H_RES; disp_drv.ver_res = EXAMPLE_LCD_V_RES; disp_drv.flush_cb = example_lvgl_flush_cb; disp_drv.drv_update_cb = example_lvgl_port_update_callback; disp_drv.draw_buf = &disp_buf; disp_drv.user_data = panel_handle; lv_disp_t *disp = lv_disp_drv_register(&disp_drv); ESP_LOGI(TAG, "Install LVGL tick timer"); // Tick interface for LVGL (using esp_timer to generate 2ms periodic event) const esp_timer_create_args_t lvgl_tick_timer_args = { .callback = &example_increase_lvgl_tick, .name = "lvgl_tick" }; esp_timer_handle_t lvgl_tick_timer = NULL; ESP_ERROR_CHECK(esp_timer_create(&lvgl_tick_timer_args, &lvgl_tick_timer)); ESP_ERROR_CHECK(esp_timer_start_periodic(lvgl_tick_timer, EXAMPLE_LVGL_TICK_PERIOD_MS * 1000)); #if CONFIG_EXAMPLE_LCD_TOUCH_ENABLED static lv_indev_drv_t indev_drv; // Input device driver (Touch) lv_indev_drv_init(&indev_drv); indev_drv.type = LV_INDEV_TYPE_POINTER; indev_drv.disp = disp; indev_drv.read_cb = example_lvgl_touch_cb; indev_drv.user_data = tp; lv_indev_drv_register(&indev_drv); #endif ESP_LOGI(TAG, "Display LVGL Meter Widget"); example_lvgl_demo_ui(disp); while (1) { // raise the task priority of LVGL and/or reduce the handler period can improve the performance vTaskDelay(pdMS_TO_TICKS(10)); // The task running lv_timer_handler should have lower priority than that running `lv_tick_inc` lv_timer_handler(); } }