esp-idf/examples/peripherals/lcd/i80_controller/main/i80_controller_example_main.c

/*
 * SPDX-FileCopyrightText: 2021-2023 Espressif Systems (Shanghai) CO LTD
 *
 * SPDX-License-Identifier: CC0-1.0
 */

#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/semphr.h"
#include "esp_timer.h"
#include "esp_lcd_panel_io.h"
#include "esp_lcd_panel_vendor.h"
#include "esp_lcd_panel_ops.h"
#include "esp_lcd_touch.h"
#include "esp_spiffs.h"
#include "driver/gpio.h"
#include "driver/i2c.h"
#include "esp_err.h"
#include "esp_log.h"
#include "esp_dma_utils.h"
#include "lvgl.h"
#if CONFIG_EXAMPLE_LCD_TOUCH_CONTROLLER_GT911
#include "esp_lcd_touch_gt911.h"
#elif CONFIG_EXAMPLE_LCD_TOUCH_CONTROLLER_TT21100
#include "esp_lcd_touch_tt21100.h"
#elif CONFIG_EXAMPLE_LCD_TOUCH_CONTROLLER_FT5X06
#include "esp_lcd_touch_ft5x06.h"
#endif

static const char *TAG = "example";

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////// Please update the following configuration according to your LCD spec //////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#if CONFIG_EXAMPLE_LCD_I80_COLOR_IN_PSRAM
// PCLK frequency can't go too high as the limitation of PSRAM bandwidth
#define EXAMPLE_LCD_PIXEL_CLOCK_HZ     (2 * 1000 * 1000)
#else
#define EXAMPLE_LCD_PIXEL_CLOCK_HZ     (10 * 1000 * 1000)
#endif // CONFIG_EXAMPLE_LCD_I80_COLOR_IN_PSRAM

#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_DATA0          6
#define EXAMPLE_PIN_NUM_DATA1          7
#define EXAMPLE_PIN_NUM_DATA2          8
#define EXAMPLE_PIN_NUM_DATA3          9
#define EXAMPLE_PIN_NUM_DATA4          10
#define EXAMPLE_PIN_NUM_DATA5          11
#define EXAMPLE_PIN_NUM_DATA6          12
#define EXAMPLE_PIN_NUM_DATA7          13
#if CONFIG_EXAMPLE_LCD_I80_BUS_WIDTH > 8
#define EXAMPLE_PIN_NUM_DATA8          14
#define EXAMPLE_PIN_NUM_DATA9          15
#define EXAMPLE_PIN_NUM_DATA10         16
#define EXAMPLE_PIN_NUM_DATA11         17
#define EXAMPLE_PIN_NUM_DATA12         18
#define EXAMPLE_PIN_NUM_DATA13         19
#define EXAMPLE_PIN_NUM_DATA14         20
#define EXAMPLE_PIN_NUM_DATA15         21
#endif
#define EXAMPLE_PIN_NUM_PCLK           5
#define EXAMPLE_PIN_NUM_CS             3
#define EXAMPLE_PIN_NUM_DC             4
#define EXAMPLE_PIN_NUM_RST            2
#define EXAMPLE_PIN_NUM_BK_LIGHT       1

// The pixel number in horizontal and vertical
#define EXAMPLE_LCD_H_RES              240
#define EXAMPLE_LCD_V_RES              280
// Bit number used to represent command and parameter
#if CONFIG_EXAMPLE_LCD_I80_CONTROLLER_ST7789
#define EXAMPLE_LCD_CMD_BITS           8
#define EXAMPLE_LCD_PARAM_BITS         8
#elif CONFIG_EXAMPLE_LCD_I80_CONTROLLER_NT35510
#define EXAMPLE_LCD_CMD_BITS           16
#define EXAMPLE_LCD_PARAM_BITS         16
#elif CONFIG_EXAMPLE_LCD_I80_CONTROLLER_ILI9341
#define EXAMPLE_LCD_CMD_BITS           8
#define EXAMPLE_LCD_PARAM_BITS         8
#endif

#if CONFIG_EXAMPLE_LCD_TOUCH_ENABLED
#define EXAMPLE_I2C_NUM                 0   // I2C number
#define EXAMPLE_I2C_SCL                 39
#define EXAMPLE_I2C_SDA                 40
#endif

#define EXAMPLE_LVGL_TICK_PERIOD_MS    2
#define EXAMPLE_LVGL_TASK_MAX_DELAY_MS 500
#define EXAMPLE_LVGL_TASK_MIN_DELAY_MS 1
#define EXAMPLE_LVGL_TASK_STACK_SIZE   (4 * 1024)
#define EXAMPLE_LVGL_TASK_PRIORITY     2

// Supported alignment: 16, 32, 64. A higher alignment can enables higher burst transfer size, thus a higher i80 bus throughput.
#define EXAMPLE_PSRAM_DATA_ALIGNMENT   64

static SemaphoreHandle_t lvgl_mux = NULL;

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);
}

#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) {
        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);
}

bool example_lvgl_lock(int timeout_ms)
{
    // Convert timeout in milliseconds to FreeRTOS ticks
    // If `timeout_ms` is set to -1, the program will block until the condition is met
    const TickType_t timeout_ticks = (timeout_ms == -1) ? portMAX_DELAY : pdMS_TO_TICKS(timeout_ms);
    return xSemaphoreTakeRecursive(lvgl_mux, timeout_ticks) == pdTRUE;
}

void example_lvgl_unlock(void)
{
    xSemaphoreGiveRecursive(lvgl_mux);
}

static void example_lvgl_port_task(void *arg)
{
    ESP_LOGI(TAG, "Starting LVGL task");
    uint32_t task_delay_ms = EXAMPLE_LVGL_TASK_MAX_DELAY_MS;
    while (1) {
        // Lock the mutex due to the LVGL APIs are not thread-safe
        if (example_lvgl_lock(-1)) {
            task_delay_ms = lv_timer_handler();
            // Release the mutex
            example_lvgl_unlock();
        }
        if (task_delay_ms > EXAMPLE_LVGL_TASK_MAX_DELAY_MS) {
            task_delay_ms = EXAMPLE_LVGL_TASK_MAX_DELAY_MS;
        } else if (task_delay_ms < EXAMPLE_LVGL_TASK_MIN_DELAY_MS) {
            task_delay_ms = EXAMPLE_LVGL_TASK_MIN_DELAY_MS;
        }
        vTaskDelay(pdMS_TO_TICKS(task_delay_ms));
    }
}

#if CONFIG_EXAMPLE_LCD_IMAGE_FROM_FILE_SYSTEM
void example_init_filesystem(void)
{
    ESP_LOGI(TAG, "Initializing filesystem");
    esp_vfs_spiffs_conf_t conf = {
        .base_path = "/spiffs",
        .partition_label = "storage",
        .max_files = 5,
        .format_if_mount_failed = true
    };

    // Use settings defined above to initialize and mount SPIFFS filesystem.
    // Note: esp_vfs_spiffs_register is an all-in-one convenience function.
    esp_err_t ret = esp_vfs_spiffs_register(&conf);

    if (ret != ESP_OK) {
        if (ret == ESP_FAIL) {
            ESP_LOGE(TAG, "Failed to mount or format filesystem");
        } else if (ret == ESP_ERR_NOT_FOUND) {
            ESP_LOGE(TAG, "Failed to find SPIFFS partition");
        } else {
            ESP_LOGE(TAG, "Failed to initialize SPIFFS (%s)", esp_err_to_name(ret));
        }
        return;
    }

    size_t total = 0, used = 0;
    ret = esp_spiffs_info(conf.partition_label, &total, &used);
    if (ret != ESP_OK) {
        ESP_LOGE(TAG, "Failed to get SPIFFS partition information (%s). Formatting...", esp_err_to_name(ret));
        esp_spiffs_format(conf.partition_label);
        return;
    } else {
        ESP_LOGI(TAG, "Partition size: total: %zu, used: %zu", total, used);
    }
}
#endif // CONFIG_EXAMPLE_LCD_IMAGE_FROM_FILE_SYSTEM

void example_init_i80_bus(esp_lcd_panel_io_handle_t *io_handle, void *user_ctx)
{
    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,
#if CONFIG_EXAMPLE_LCD_I80_BUS_WIDTH > 8
            EXAMPLE_PIN_NUM_DATA8,
            EXAMPLE_PIN_NUM_DATA9,
            EXAMPLE_PIN_NUM_DATA10,
            EXAMPLE_PIN_NUM_DATA11,
            EXAMPLE_PIN_NUM_DATA12,
            EXAMPLE_PIN_NUM_DATA13,
            EXAMPLE_PIN_NUM_DATA14,
            EXAMPLE_PIN_NUM_DATA15,
#endif
        },
        .bus_width = CONFIG_EXAMPLE_LCD_I80_BUS_WIDTH,
        .max_transfer_bytes = EXAMPLE_LCD_H_RES * 100 * 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_i80_config_t io_config = {
        .cs_gpio_num = EXAMPLE_PIN_NUM_CS,
        .pclk_hz = EXAMPLE_LCD_PIXEL_CLOCK_HZ,
        .trans_queue_depth = 10,
        .dc_levels = {
            .dc_idle_level = 0,
            .dc_cmd_level = 0,
            .dc_dummy_level = 0,
            .dc_data_level = 1,
        },
        .flags = {
            .swap_color_bytes = !LV_COLOR_16_SWAP, // Swap can be done in LvGL (default) or DMA
        },
        .on_color_trans_done = example_notify_lvgl_flush_ready,
        .user_ctx = user_ctx,
        .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));
}

void example_init_lcd_panel(esp_lcd_panel_io_handle_t io_handle, esp_lcd_panel_handle_t *panel)
{
    esp_lcd_panel_handle_t panel_handle = NULL;
#if CONFIG_EXAMPLE_LCD_I80_CONTROLLER_ST7789
    ESP_LOGI(TAG, "Install LCD driver of st7789");
    esp_lcd_panel_dev_config_t panel_config = {
        .reset_gpio_num = EXAMPLE_PIN_NUM_RST,
        .rgb_ele_order = LCD_RGB_ELEMENT_ORDER_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);
    // Set inversion, x/y coordinate order, x/y mirror according to your LCD module spec
    // the gap is LCD panel specific, even panels with the same driver IC, can have different gap value
    esp_lcd_panel_invert_color(panel_handle, true);
    esp_lcd_panel_set_gap(panel_handle, 0, 20);
#elif CONFIG_EXAMPLE_LCD_I80_CONTROLLER_NT35510
    ESP_LOGI(TAG, "Install LCD driver of nt35510");
    esp_lcd_panel_dev_config_t panel_config = {
        .reset_gpio_num = EXAMPLE_PIN_NUM_RST,
        .rgb_ele_order = LCD_RGB_ELEMENT_ORDER_BGR,
        .bits_per_pixel = 16,
    };
    ESP_ERROR_CHECK(esp_lcd_new_panel_nt35510(io_handle, &panel_config, &panel_handle));

    esp_lcd_panel_reset(panel_handle);
    esp_lcd_panel_init(panel_handle);
    // Set inversion, x/y coordinate order, x/y mirror according to your LCD module spec
    // the gap is LCD panel specific, even panels with the same driver IC, can have different gap value
    esp_lcd_panel_swap_xy(panel_handle, true);
    esp_lcd_panel_mirror(panel_handle, true, false);
#elif CONFIG_EXAMPLE_LCD_I80_CONTROLLER_ILI9341
    // ILI9341 is NOT a distinct driver, but a special case of ST7789
    // (essential registers are identical). A few lines further down in this code,
    // it's shown how to issue additional device-specific commands.
    ESP_LOGI(TAG, "Install LCD driver of ili9341 (st7789 compatible)");
    esp_lcd_panel_dev_config_t panel_config = {
        .reset_gpio_num = EXAMPLE_PIN_NUM_RST,
        .rgb_ele_order = LCD_RGB_ELEMENT_ORDER_BGR,
        .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);
    // Set inversion, x/y coordinate order, x/y mirror according to your LCD module spec
    // the gap is LCD panel specific, even panels with the same driver IC, can have different gap value
    esp_lcd_panel_swap_xy(panel_handle, true);
    esp_lcd_panel_invert_color(panel_handle, false);
    // ILI9341 is very similar to ST7789 and shares the same driver.
    // Anything unconventional (such as this custom gamma table) can
    // be issued here in user code and need not modify the driver.
    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);
#endif
    *panel = panel_handle;
}

#if CONFIG_EXAMPLE_LCD_TOUCH_ENABLED
void example_init_lcd_touch(esp_lcd_touch_handle_t *tp_handle)
{
    esp_lcd_touch_handle_t tp = NULL;
    esp_lcd_panel_io_handle_t tp_io_handle = NULL;

    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_GT911
    esp_lcd_panel_io_i2c_config_t tp_io_config = ESP_LCD_TOUCH_IO_I2C_GT911_CONFIG();
#elif CONFIG_EXAMPLE_LCD_TOUCH_CONTROLLER_TT21100
    esp_lcd_panel_io_i2c_config_t tp_io_config = ESP_LCD_TOUCH_IO_I2C_TT21100_CONFIG();
#elif CONFIG_EXAMPLE_LCD_TOUCH_CONTROLLER_FT5X06
    esp_lcd_panel_io_i2c_config_t tp_io_config = ESP_LCD_TOUCH_IO_I2C_FT5x06_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 = -1,
        .int_gpio_num = -1,
        .flags = {
            .swap_xy = 1,
            .mirror_x = 1,
            .mirror_y = 0,
        },
    };

    /* Initialize touch */
#if CONFIG_EXAMPLE_LCD_TOUCH_CONTROLLER_GT911
    ESP_LOGI(TAG, "Initialize touch controller GT911");
    ESP_ERROR_CHECK(esp_lcd_touch_new_i2c_gt911(tp_io_handle, &tp_cfg, &tp));
#elif CONFIG_EXAMPLE_LCD_TOUCH_CONTROLLER_TT21100
    ESP_LOGI(TAG, "Initialize touch controller TT21100");
    ESP_ERROR_CHECK(esp_lcd_touch_new_i2c_tt21100(tp_io_handle, &tp_cfg, &tp));
#elif CONFIG_EXAMPLE_LCD_TOUCH_CONTROLLER_FT5X06
    ESP_LOGI(TAG, "Initialize touch controller FT5X06");
    ESP_ERROR_CHECK(esp_lcd_touch_new_i2c_ft5x06(tp_io_handle, &tp_cfg, &tp));
#endif
    *tp_handle = tp;
}
#endif // CONFIG_EXAMPLE_LCD_TOUCH_ENABLED

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

#if EXAMPLE_PIN_NUM_BK_LIGHT >= 0
    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));
    gpio_set_level(EXAMPLE_PIN_NUM_BK_LIGHT, EXAMPLE_LCD_BK_LIGHT_OFF_LEVEL);
#endif // EXAMPLE_PIN_NUM_BK_LIGHT >= 0

#if CONFIG_EXAMPLE_LCD_IMAGE_FROM_FILE_SYSTEM
    example_init_filesystem();
#endif // CONFIG_EXAMPLE_LCD_IMAGE_FROM_FILE_SYSTEM

    esp_lcd_panel_io_handle_t io_handle = NULL;
    example_init_i80_bus(&io_handle, &disp_drv);

    esp_lcd_panel_handle_t panel_handle = NULL;
    example_init_lcd_panel(io_handle, &panel_handle);

#if CONFIG_EXAMPLE_LCD_TOUCH_ENABLED
    esp_lcd_touch_handle_t tp_handle = NULL;
    example_init_lcd_touch(&tp_handle);
#endif // CONFIG_EXAMPLE_LCD_TOUCH_ENABLED

    // Stub: 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 EXAMPLE_PIN_NUM_BK_LIGHT >= 0
    ESP_LOGI(TAG, "Turn on LCD backlight");
    gpio_set_level(EXAMPLE_PIN_NUM_BK_LIGHT, EXAMPLE_LCD_BK_LIGHT_ON_LEVEL);
#endif // EXAMPLE_PIN_NUM_BK_LIGHT >= 0

    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 = NULL;
    lv_color_t *buf2 = NULL;
    uint32_t malloc_flags = 0;
#if CONFIG_EXAMPLE_LCD_I80_COLOR_IN_PSRAM
    malloc_flags |= ESP_DMA_MALLOC_FLAG_PSRAM;
#endif // CONFIG_EXAMPLE_LCD_I80_COLOR_IN_PSRAM
    ESP_ERROR_CHECK(esp_dma_malloc(EXAMPLE_LCD_H_RES * 100 * sizeof(lv_color_t), malloc_flags, (void *)&buf1, NULL));
    ESP_ERROR_CHECK(esp_dma_malloc(EXAMPLE_LCD_H_RES * 100 * sizeof(lv_color_t), malloc_flags, (void *)&buf2, NULL));
    assert(buf1);
    assert(buf2);
    ESP_LOGI(TAG, "buf1@%p, buf2@%p", buf1, buf2);
    // initialize LVGL draw buffers
    lv_disp_draw_buf_init(&disp_buf, buf1, buf2, EXAMPLE_LCD_H_RES * 100);

    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;
    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_handle;
    lv_indev_drv_register(&indev_drv);
#endif // CONFIG_EXAMPLE_LCD_TOUCH_ENABLED

    lvgl_mux = xSemaphoreCreateRecursiveMutex();
    assert(lvgl_mux);
    ESP_LOGI(TAG, "Create LVGL task");
    xTaskCreate(example_lvgl_port_task, "LVGL", EXAMPLE_LVGL_TASK_STACK_SIZE, NULL, EXAMPLE_LVGL_TASK_PRIORITY, NULL);

    ESP_LOGI(TAG, "Display LVGL animation");
    // Lock the mutex due to the LVGL APIs are not thread-safe
    if (example_lvgl_lock(-1)) {
        example_lvgl_demo_ui(disp);
        // Release the mutex
        example_lvgl_unlock();
    }
}