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 backlight
ESP_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"
#endif
static 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 2
static SemaphoreHandle_t lvgl_mux = NULL;
#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) {
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));
}
}
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");
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 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_ele_order = LCD_RGB_ELEMENT_ORDER_BGR,
.bits_per_pixel = 16,
};
#if CONFIG_EXAMPLE_LCD_CONTROLLER_ILI9341
ESP_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_GC9A01
ESP_LOGI(TAG, "Install GC9A01 panel driver");
ESP_ERROR_CHECK(esp_lcd_new_panel_gc9a01(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_GC9A01
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_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 bus
ESP_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_STMPE610
ESP_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_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
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 Meter Widget");
// 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();
}
}
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LCD
esp_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LCD
esp_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 functions
led_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