// // display: initialize lcd and lvgl // #include "display.h" #include "esp_err.h" #include "esp_log.h" #include "esp_check.h" #include "driver/i2c.h" #include "driver/gpio.h" #include "driver/spi_master.h" #include "esp_lcd_panel_io.h" #include "esp_lcd_panel_vendor.h" #include "esp_lcd_panel_ops.h" #include "esp_lvgl_port.h" #include #include "esp_timer.h" #include "esp_heap_caps.h" #include "freertos/FreeRTOS.h" #include "freertos/task.h" // Private variables static const char *TAG = "display"; static void lvgl_timer_task(void *arg); static SemaphoreHandle_t lvgl_mux; // LVGL mutex static SemaphoreHandle_t touch_mux; // Touch mutex #define BSP_NULL_CHECK(x, ret) assert(x) #if USE_TOUCH_DISPLAY static void bsp_touchpad_read(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 data from touch controller into memory */ if (xSemaphoreTake(touch_mux, 0) == pdTRUE) { 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) { data->point.x = touchpad_x[0]; data->point.y = touchpad_y[0]; data->state = LV_INDEV_STATE_PRESSED; printf("data->point.x = %u \n", data->point.x); printf("data->point.y = %u \n", data->point.y); } else { data->state = LV_INDEV_STATE_RELEASED; } } static void touch_callback(esp_lcd_touch_handle_t tp) { BaseType_t xHigherPriorityTaskWoken = pdFALSE; xSemaphoreGiveFromISR(touch_mux, &xHigherPriorityTaskWoken); if (xHigherPriorityTaskWoken) { portYIELD_FROM_ISR(); } } #endif // Flush ready 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; } // Flush buffer to display 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); } // Tick handler static void example_increase_lvgl_tick(void *arg) { /* Tell LVGL how many milliseconds has elapsed */ lv_tick_inc(EXAMPLE_LVGL_TICK_PERIOD_MS); } // Initialize display void display_init() { 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 gpio_config_t pwr_gpio_config = { .mode = GPIO_MODE_OUTPUT, .pin_bit_mask = 1ULL << EXAMPLE_PIN_NUM_POWER}; ESP_ERROR_CHECK(gpio_config(&pwr_gpio_config)); gpio_set_level(EXAMPLE_PIN_NUM_POWER, EXAMPLE_LCD_BK_LIGHT_ON_LEVEL); gpio_config_t input_conf = { .mode = GPIO_MODE_INPUT, .pull_up_en = GPIO_PULLUP_ENABLE, .pin_bit_mask = 1ULL << PIN_LCD_RD}; ESP_ERROR_CHECK(gpio_config(&input_conf)); 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)); gpio_set_level(EXAMPLE_PIN_NUM_BK_LIGHT, EXAMPLE_LCD_BK_LIGHT_ON_LEVEL); ESP_LOGI(TAG, "Initialize Intel 8080 bus"); esp_lcd_i80_bus_handle_t i80_bus = NULL; esp_lcd_i80_bus_config_t bus_config = { .clk_src = LCD_CLK_SRC_DEFAULT, .dc_gpio_num = EXAMPLE_PIN_NUM_DC, .wr_gpio_num = EXAMPLE_PIN_NUM_PCLK, .data_gpio_nums = { EXAMPLE_PIN_NUM_DATA0, EXAMPLE_PIN_NUM_DATA1, EXAMPLE_PIN_NUM_DATA2, EXAMPLE_PIN_NUM_DATA3, EXAMPLE_PIN_NUM_DATA4, EXAMPLE_PIN_NUM_DATA5, EXAMPLE_PIN_NUM_DATA6, EXAMPLE_PIN_NUM_DATA7, }, .bus_width = 8, .max_transfer_bytes = LVGL_LCD_BUF_SIZE * sizeof(uint16_t) //.psram_trans_align = EXAMPLE_PSRAM_DATA_ALIGNMENT, //.sram_trans_align = 4, }; ESP_ERROR_CHECK(esp_lcd_new_i80_bus(&bus_config, &i80_bus)); esp_lcd_panel_io_handle_t io_handle = NULL; esp_lcd_panel_io_i80_config_t io_config = { .cs_gpio_num = EXAMPLE_PIN_NUM_CS, .pclk_hz = EXAMPLE_LCD_PIXEL_CLOCK_HZ, .trans_queue_depth = 20, .dc_levels = { .dc_idle_level = 0, .dc_cmd_level = 0, .dc_dummy_level = 0, .dc_data_level = 1, }, .on_color_trans_done = example_notify_lvgl_flush_ready, .user_ctx = &disp_drv, .lcd_cmd_bits = EXAMPLE_LCD_CMD_BITS, .lcd_param_bits = EXAMPLE_LCD_PARAM_BITS, }; ESP_ERROR_CHECK(esp_lcd_new_panel_io_i80(i80_bus, &io_config, &io_handle)); esp_lcd_panel_handle_t panel_handle = NULL; ESP_LOGI(TAG, "Install LCD driver of st7789"); esp_lcd_panel_dev_config_t panel_config = { .reset_gpio_num = EXAMPLE_PIN_NUM_RST, .rgb_endian = ESP_LCD_COLOR_SPACE_RGB, .bits_per_pixel = 16, }; ESP_ERROR_CHECK(esp_lcd_new_panel_st7789(io_handle, &panel_config, &panel_handle)); esp_lcd_panel_reset(panel_handle); esp_lcd_panel_init(panel_handle); esp_lcd_panel_invert_color(panel_handle, true); esp_lcd_panel_swap_xy(panel_handle, true); esp_lcd_panel_mirror(panel_handle, false, true); // the gap is LCD panel specific, even panels with the same driver IC, can have different gap value esp_lcd_panel_set_gap(panel_handle, 0, 35); esp_lcd_panel_io_tx_param(io_handle, 0xF2, (uint8_t[]){0}, 1); // 3Gamma function disable esp_lcd_panel_io_tx_param(io_handle, 0x26, (uint8_t[]){1}, 1); // Gamma curve 1 selected esp_lcd_panel_io_tx_param(io_handle, 0xE0, (uint8_t[]){ // Set positive gamma 0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08, 0x4E, 0xF1, 0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00}, 15); esp_lcd_panel_io_tx_param(io_handle, 0xE1, (uint8_t[]){// Set negative gamma 0x00, 0x0E, 0x14, 0x03, 0x11, 0x07, 0x31, 0xC1, 0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F}, 15); ESP_ERROR_CHECK(esp_lcd_panel_disp_on_off(panel_handle, true)); #if USE_TOUCH_DISPLAY // CST816 TOUCH TESTING FUNCTION esp_lcd_touch_handle_t tp = NULL; esp_lcd_panel_io_handle_t tp_io_handle = NULL; 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, }; ESP_LOGI(TAG, "Initializing I2C for display touch"); /* 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)); i2c_cmd_handle_t cmd; for (int i = 0; i < 0x7f; i++) { cmd = i2c_cmd_link_create(); i2c_master_start(cmd); i2c_master_write_byte(cmd, (i << 1) | I2C_MASTER_WRITE, true); i2c_master_stop(cmd); if (i2c_master_cmd_begin(EXAMPLE_I2C_NUM, cmd, portMAX_DELAY) == ESP_OK) { ESP_LOGW("I2C_TEST", "%02X", i); } i2c_cmd_link_delete(cmd); } esp_lcd_panel_io_i2c_config_t tp_io_config = ESP_LCD_TOUCH_IO_I2C_CST816S_CONFIG(); ESP_LOGI(TAG, "esp_lcd_new_panel_io_i2c"); 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 = 170, .y_max = 320, .rst_gpio_num = 21, .int_gpio_num = 16, .levels = { .reset = 0, .interrupt = 0, }, .flags = { .swap_xy = 1, .mirror_x = 0, .mirror_y = 1, }, .interrupt_callback = touch_callback, }; ESP_LOGI(TAG, "esp_lcd_touch_new_i2c_cst816s"); esp_lcd_touch_new_i2c_cst816s(tp_io_handle, &tp_cfg, &tp); // END OF CST816 TOUCH TESTING FUNCTION #endif lv_init(); lvgl_mux = xSemaphoreCreateMutex(); BSP_NULL_CHECK(lvgl_mux, NULL); #if USE_TOUCH_DISPLAY touch_mux = xSemaphoreCreateBinary(); BSP_NULL_CHECK(touch_mux, NULL); #endif // 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(LVGL_LCD_BUF_SIZE * sizeof(lv_color_t), MALLOC_CAP_DMA); assert(buf1); lv_disp_draw_buf_init(&disp_buf, buf1, NULL, LVGL_LCD_BUF_SIZE); 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.draw_buf = &disp_buf; disp_drv.user_data = panel_handle; disp_drv.sw_rotate = 1; 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 USE_TOUCH_DISPLAY static lv_indev_drv_t indev_drv; // Input device driver (Touch) lv_indev_t *indev_touchpad; lv_indev_drv_init(&indev_drv); indev_drv.type = LV_INDEV_TYPE_POINTER; indev_drv.disp = disp; indev_drv.read_cb = bsp_touchpad_read; indev_drv.user_data = tp; indev_touchpad = lv_indev_drv_register(&indev_drv); BSP_NULL_CHECK(indev_touchpad, ESP_ERR_NO_MEM); #endif xTaskCreatePinnedToCore(lvgl_timer_task, "lvgl Timer", 10000, NULL, 4, NULL, 1); } // Task for lvgl timer static void lvgl_timer_task(void *arg) { ESP_LOGI(TAG, "Starting LVGL task"); while (1) { display_lock(0); uint32_t task_delay_ms = lv_timer_handler(); display_unlock(); if (task_delay_ms > 500) { task_delay_ms = 500; } else if (task_delay_ms < 5) { task_delay_ms = 5; } vTaskDelay(pdMS_TO_TICKS(task_delay_ms)); } } // Semaphore-based locking of display bool display_lock(uint32_t timeout_ms) { BSP_NULL_CHECK(lvgl_mux, NULL); const TickType_t timeout_ticks = (timeout_ms == 0) ? portMAX_DELAY : pdMS_TO_TICKS(timeout_ms); return xSemaphoreTake(lvgl_mux, timeout_ticks) == pdTRUE; } // Semaphore-based unlocking of display void display_unlock(void) { BSP_NULL_CHECK(lvgl_mux, NULL); xSemaphoreGive(lvgl_mux); }