书接上回，上一篇blog是使用esp32s3通过ov2640摄像头拍摄到一帧照片，并把它保存到了SD卡中，这第二篇就通过LCD将拍摄到的图片显示到LCD上，本次分享硬件使用的 ESP32-S3-CAM 果云科技开发板，并且使用了配套的LCD扩展板，扩展板上可以插一个驱动为ili9341的SPI屏

一：现象！

第一件事，还是摆具体实现的现象：

摄像头拍到的图像实时传输到LCD屏幕上，唯一缺点是使用的图像RGB565的格式，图像不那么清晰

二：配置！

这次esp32用到的外设有camera、lcd以及led，psram这些，没有其他的什么，

先来讲讲这些基础配置，camera和led的配置代码如上一篇blog一样，不需要做什么改变，在每次主函数和任务开始前进行一个初始化操作即可，然后是lcd，lcd的初始化主要是参考了idf的example：spi_lcd_touch，

因为我们lcd与mcu的通信一般是spi，所以需要初始化lcd和mcu之间的spi通信，代码如下所示：

spi_bus_config_t buscfg = {.sclk_io_num = EXAMPLE_PIN_NUM_SCLK,.mosi_io_num = EXAMPLE_PIN_NUM_MOSI,.miso_io_num = EXAMPLE_PIN_NUM_MISO,.quadwp_io_num = -1,.quadhd_io_num = -1,.max_transfer_sz = EXAMPLE_LCD_H_RES * 80 * sizeof(uint16_t),
};
spi_bus_initialize(LCD_HOST, &buscfg, SPI_DMA_CH_AUTO);

这里面我们需要定义spi的三个引脚，max_transfer_sz是一次最大传输字节数，这个配置影响的是DMA的传输性能

紧接着是要初始化esp_lcd_panel_io，也就是LCD面板IO句柄

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,
};esp_lcd_new_panel_io_spi((esp_lcd_spi_bus_handle_t)LCD_HOST, &io_config, &io_handle);

在此之前我们还需要定义一个面板驱动

esp_lcd_panel_handle_t panel_handle = NULL;

最后是初始化具体的lcd驱动，包括重启的io和lcd显示的rgb格式

    // 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_ele_order = ESP_LCD_COLOR_SPACE_RGB,.bits_per_pixel = 16,};

最后是需要检查驱动ILI9341屏幕这一系列命令有没有报错

    ESP_ERROR_CHECK(esp_lcd_new_panel_ili9341(io_handle, &panel_config, &panel_handle));ESP_ERROR_CHECK(esp_lcd_panel_reset(panel_handle));ESP_ERROR_CHECK(esp_lcd_panel_init(panel_handle));ESP_ERROR_CHECK(esp_lcd_panel_swap_xy(panel_handle, true));ESP_ERROR_CHECK(esp_lcd_panel_invert_color(panel_handle, true));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 backlightESP_ERROR_CHECK(esp_lcd_panel_disp_on_off(panel_handle, true));ESP_LOGI(TAG, "Turn on LCD backlight");gpio_set_level(EXAMPLE_PIN_NUM_BK_LIGHT, EXAMPLE_LCD_BK_LIGHT_ON_LEVEL);

这里面有一句很关键的代码，就是 ESP_ERROR_CHECK(esp_lcd_panel_swap_xy(panel_handle, true));
ESP_ERROR_CHECK(esp_lcd_panel_invert_color(panel_handle, true));

这两句代码翻转了LCD屏显示的方向，从原来的纵向改成了横向显示，以及将ILI9341默认的BGR565颜色编码格式改成了RGB565

最后就是根据原理图修改io引脚，

具体修改之后的.h文件如下：

#define LCD_HOST  SPI2_HOST////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////// Please update the following configuration according to your LCD spec //////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#define EXAMPLE_LCD_PIXEL_CLOCK_HZ     (40 * 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           3
#define EXAMPLE_PIN_NUM_MOSI           45
#define EXAMPLE_PIN_NUM_MISO           46
#define EXAMPLE_PIN_NUM_LCD_DC         47
#define EXAMPLE_PIN_NUM_LCD_RST        21
#define EXAMPLE_PIN_NUM_LCD_CS         14
#define EXAMPLE_PIN_NUM_BK_LIGHT       0
#define EXAMPLE_PIN_NUM_TOUCH_CS       -256// The pixel number in horizontal and vertical#define EXAMPLE_LCD_H_RES              240
#define EXAMPLE_LCD_V_RES              320
#define LCD_WIDTH 320
#define LCD_HEIGHT 240
// #elif CONFIG_EXAMPLE_LCD_CONTROLLER_GC9A01
// #define EXAMPLE_LCD_H_RES              240
// #define EXAMPLE_LCD_V_RES              240
// #endif
// Bit number used to represent command and parameter
#define EXAMPLE_LCD_CMD_BITS           8
#define EXAMPLE_LCD_PARAM_BITS         8

三：学习历程

为了实现我们最终想要实现的功能，我将他划分成了三个部分，首先是需要camera。camera可以捕获到照片，这是第一步，而第一步我们在第一篇blog已经完成了，然后是第二步，我们需要点亮lcd屏幕，这个部分我主要参考的是上文中提到的example，

代码我也贴在下面，

/** 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 "driver/gpio.h"
#include "driver/spi_master.h"
#include "esp_err.h"
#include "esp_log.h"
#include "lvgl.h"#if CONFIG_EXAMPLE_LCD_CONTROLLER_ILI9341
#include "esp_lcd_ili9341.h"
#elif CONFIG_EXAMPLE_LCD_CONTROLLER_GC9A01
#include "esp_lcd_gc9a01.h"
#endif#if CONFIG_EXAMPLE_LCD_TOUCH_CONTROLLER_STMPE610
#include "esp_lcd_touch_stmpe610.h"
#endifstatic const char *TAG = "example";// Using SPI2 in the example
#define LCD_HOST  SPI2_HOST////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////// Please update the following configuration according to your LCD spec //////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#define EXAMPLE_LCD_PIXEL_CLOCK_HZ     (40 * 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           3
#define EXAMPLE_PIN_NUM_MOSI           45
#define EXAMPLE_PIN_NUM_MISO           46
#define EXAMPLE_PIN_NUM_LCD_DC         47
#define EXAMPLE_PIN_NUM_LCD_RST        21
#define EXAMPLE_PIN_NUM_LCD_CS         14
#define EXAMPLE_PIN_NUM_BK_LIGHT       0
#define EXAMPLE_PIN_NUM_TOUCH_CS       1// The pixel number in horizontal and vertical
#if CONFIG_EXAMPLE_LCD_CONTROLLER_ILI9341
#define EXAMPLE_LCD_H_RES              240
#define EXAMPLE_LCD_V_RES              320
#elif CONFIG_EXAMPLE_LCD_CONTROLLER_GC9A01
#define EXAMPLE_LCD_H_RES              240
#define EXAMPLE_LCD_V_RES              240
#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
#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     2static SemaphoreHandle_t lvgl_mux = NULL;#if CONFIG_EXAMPLE_LCD_TOUCH_ENABLED
esp_lcd_touch_handle_t tp = NULL;
#endifextern 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 displayesp_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 displayesp_lcd_panel_swap_xy(panel_handle, false);esp_lcd_panel_mirror(panel_handle, true, false);
#if CONFIG_EXAMPLE_LCD_TOUCH_ENABLED// Rotate LCD touchesp_lcd_touch_set_mirror_y(tp, false);esp_lcd_touch_set_mirror_x(tp, false);
#endifbreak;case LV_DISP_ROT_90:// Rotate LCD displayesp_lcd_panel_swap_xy(panel_handle, true);esp_lcd_panel_mirror(panel_handle, true, true);
#if CONFIG_EXAMPLE_LCD_TOUCH_ENABLED// Rotate LCD touchesp_lcd_touch_set_mirror_y(tp, false);esp_lcd_touch_set_mirror_x(tp, false);
#endifbreak;case LV_DISP_ROT_180:// Rotate LCD displayesp_lcd_panel_swap_xy(panel_handle, false);esp_lcd_panel_mirror(panel_handle, false, true);
#if CONFIG_EXAMPLE_LCD_TOUCH_ENABLED// Rotate LCD touchesp_lcd_touch_set_mirror_y(tp, false);esp_lcd_touch_set_mirror_x(tp, false);
#endifbreak;case LV_DISP_ROT_270:// Rotate LCD displayesp_lcd_panel_swap_xy(panel_handle, true);esp_lcd_panel_mirror(panel_handle, false, false);
#if CONFIG_EXAMPLE_LCD_TOUCH_ENABLED// Rotate LCD touchesp_lcd_touch_set_mirror_y(tp, false);esp_lcd_touch_set_mirror_x(tp, false);
#endifbreak;}
}#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;}
}
#endifstatic 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 metconst 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-safeif (example_lvgl_lock(-1)) {task_delay_ms = lv_timer_handler();// Release the mutexexample_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));}
}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 functionsESP_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");spi_bus_config_t buscfg = {.sclk_io_num = EXAMPLE_PIN_NUM_SCLK,.mosi_io_num = EXAMPLE_PIN_NUM_MOSI,.miso_io_num = EXAMPLE_PIN_NUM_MISO,.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,};// Attach the LCD to the SPI busESP_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_ele_order = LCD_RGB_ELEMENT_ORDER_BGR,.bits_per_pixel = 16,};
#if CONFIG_EXAMPLE_LCD_CONTROLLER_ILI9341ESP_LOGI(TAG, "Install ILI9341 panel driver");ESP_ERROR_CHECK(esp_lcd_new_panel_ili9341(io_handle, &panel_config, &panel_handle));
#elif CONFIG_EXAMPLE_LCD_CONTROLLER_GC9A01ESP_LOGI(TAG, "Install GC9A01 panel driver");ESP_ERROR_CHECK(esp_lcd_new_panel_gc9a01(io_handle, &panel_config, &panel_handle));
#endifESP_ERROR_CHECK(esp_lcd_panel_reset(panel_handle));ESP_ERROR_CHECK(esp_lcd_panel_init(panel_handle));
#if CONFIG_EXAMPLE_LCD_CONTROLLER_GC9A01ESP_ERROR_CHECK(esp_lcd_panel_invert_color(panel_handle, true));
#endifESP_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 backlightESP_ERROR_CHECK(esp_lcd_panel_disp_on_off(panel_handle, true));#if CONFIG_EXAMPLE_LCD_TOUCH_ENABLEDesp_lcd_panel_io_handle_t tp_io_handle = NULL;esp_lcd_panel_io_spi_config_t tp_io_config = ESP_LCD_TOUCH_IO_SPI_STMPE610_CONFIG(EXAMPLE_PIN_NUM_TOUCH_CS);// Attach the TOUCH to the SPI busESP_ERROR_CHECK(esp_lcd_new_panel_io_spi((esp_lcd_spi_bus_handle_t)LCD_HOST, &tp_io_config, &tp_io_handle));esp_lcd_touch_config_t tp_cfg = {.x_max = EXAMPLE_LCD_H_RES,.y_max = EXAMPLE_LCD_V_RES,.rst_gpio_num = -1,.int_gpio_num = -1,.flags = {.swap_xy = 0,.mirror_x = 0,.mirror_y = 0,},};#if CONFIG_EXAMPLE_LCD_TOUCH_CONTROLLER_STMPE610ESP_LOGI(TAG, "Initialize touch controller STMPE610");ESP_ERROR_CHECK(esp_lcd_touch_new_spi_stmpe610(tp_io_handle, &tp_cfg, &tp));
#endif // CONFIG_EXAMPLE_LCD_TOUCH_CONTROLLER_STMPE610
#endif // CONFIG_EXAMPLE_LCD_TOUCH_ENABLEDESP_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 sizedlv_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 bufferslv_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_ENABLEDstatic 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);
#endiflvgl_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 Meter Widget");// Lock the mutex due to the LVGL APIs are not thread-safeif (example_lvgl_lock(-1)) {example_lvgl_demo_ui(disp);// Release the mutexexample_lvgl_unlock();}
}

主要用的是lvgl，在根据原理图我修改了IO口配置后，也成功将lcd点亮，

效果图如下：

这一步通过lvgl也完成了，然后就需要将lcd代码加入到我们已有的工程中：

首先是将lvgl、ili9341显示屏驱动加入到工程中

使用命令：

idf.py add-dependency "lvgl/lvgl@v8.3.3"
idf.py add-dependency "someuser/esp_lcd_ili9341"

即可将需要的依赖加入其中，然后是先编译一下，将这些依赖编译加入到我们的项目中，然后移植一下，就可以实现example中的效果

最后，就是将拍摄到的图像显示到lcd屏幕上了

我们在这里创建一个lcd的task，通过camera的 esp_camera_fb_get这个函数，将捕获到的一帧数据存到一个指针中，然后通过判断拍摄到的分辨率和lcd是否一致，可以将这帧数据直接发送给lcd并且显示出来了，代码如下：

            // 如果分辨率和LCD一致if (fb->width == LCD_WIDTH && fb->height == LCD_HEIGHT && fb->format == PIXFORMAT_RGB565){// 直接送LCDesp_lcd_panel_draw_bitmap(panel_handle, 0, 0, LCD_WIDTH, LCD_HEIGHT, fb->buf);}else{ESP_LOGE("LCD", "Frame size/format mismatch: %dx%d fmt:%d", fb->width, fb->height, fb->format);}// 释放摄像头缓冲esp_camera_fb_return(fb);}else{ESP_LOGE("LCD", "Failed to get camera frame");}

因为之前的配置，我已经把所有的坑帮你们趟过去了，所以应该会很顺利的显示出来图像

，最后如果需要显示视频的话，加一个while循环就可以了。

void lcd_task(void *param)
{while (1){camera_fb_t *fb = esp_camera_fb_get();if (fb){// 如果分辨率和LCD一致if (fb->width == LCD_WIDTH && fb->height == LCD_HEIGHT && fb->format == PIXFORMAT_RGB565){// 直接送LCDesp_lcd_panel_draw_bitmap(panel_handle, 0, 0, LCD_WIDTH, LCD_HEIGHT, fb->buf);}else{ESP_LOGE("LCD", "Frame size/format mismatch: %dx%d fmt:%d", fb->width, fb->height, fb->format);}// 释放摄像头缓冲esp_camera_fb_return(fb);}else{ESP_LOGE("LCD", "Failed to get camera frame");}// 根据需要调整刷新率vTaskDelay(pdMS_TO_TICKS(33)); // ~100fps上限}
}

最后是main函数

void app_main(void)
{esp_err_t ret;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 functionsled_init();// 检测 PSRAM 存在性和大小if(esp_psram_get_size() == 0) {ESP_LOGE("BOOT", "PSRAM NOT DETECTED! Check hardware connection.");vTaskDelay(pdMS_TO_TICKS(1000));esp_restart(); // 自动重启}ESP_LOGI("BOOT", "PSRAM Size: %d KB", esp_psram_get_size() / 1024);// // 初始化 PSRAM 缓存esp_psram_init();// 启用 PSRAM 分配// heap_caps_malloc_extmem_enable(64); // 最小分配单元64字节bsp_camera_init();lcd_init();xTaskCreatePinnedToCore(lcd_task,"lcd",4096,NULL,3,NULL,1);xTaskCreatePinnedToCore(led_blink_task,"led",4096,NULL,3,NULL,1);
//  x

最后源码链接：

通过网盘分享的文件：esp32_video
链接: https://pan.baidu.com/s/1WMGu-un_VoYQoCyNi2LvMQ?pwd=vide 提取码: vide
--来自百度网盘超级会员v4的分享