esp32cam ov2640数据
时间: 2023-09-01 14:10:49 浏览: 44
ESP32-CAM模块使用OV2640图像传感器进行图像采集,可以通过以下方式获取图像数据:
1. 使用Arduino IDE中的ESP32-CAM库进行开发,使用`camera.capture()`函数获取图像数据,如下所示:
```c++
#include "esp_camera.h"
camera_config_t config;
void setup() {
config.ledc_channel = LEDC_CHANNEL_0;
config.ledc_timer = LEDC_TIMER_0;
config.pin_d0 = Y2_GPIO_NUM;
config.pin_d1 = Y3_GPIO_NUM;
config.pin_d2 = Y4_GPIO_NUM;
config.pin_d3 = Y5_GPIO_NUM;
config.pin_d4 = Y6_GPIO_NUM;
config.pin_d5 = Y7_GPIO_NUM;
config.pin_d6 = Y8_GPIO_NUM;
config.pin_d7 = Y9_GPIO_NUM;
config.pin_xclk = XCLK_GPIO_NUM;
config.pin_pclk = PCLK_GPIO_NUM;
config.pin_vsync = VSYNC_GPIO_NUM;
config.pin_href = HREF_GPIO_NUM;
config.pin_sscb_sda = SIOD_GPIO_NUM;
config.pin_sscb_scl = SIOC_GPIO_NUM;
config.xclk_freq_hz = 20000000;
config.pixel_format = PIXFORMAT_JPEG;
// 初始化相机
esp_err_t err = esp_camera_init(&config);
if (err != ESP_OK) {
Serial.printf("Camera init failed with error 0x%x", err);
return;
}
}
void loop() {
camera_fb_t *fb = NULL;
fb = esp_camera_fb_get();
if (!fb) {
Serial.println("Camera capture failed");
return;
}
// fb->buf 是图像数据,大小为 fb->len
// 处理图像数据...
esp_camera_fb_return(fb); // 释放图像数据
}
```
2. 使用ESP-IDF进行开发,使用`esp_camera.h`中的API获取图像数据,如下所示:
```c++
#include "esp_camera.h"
camera_config_t config;
void app_main() {
config.ledc_channel = LEDC_CHANNEL_0;
config.ledc_timer = LEDC_TIMER_0;
config.pin_d0 = Y2_GPIO_NUM;
config.pin_d1 = Y3_GPIO_NUM;
config.pin_d2 = Y4_GPIO_NUM;
config.pin_d3 = Y5_GPIO_NUM;
config.pin_d4 = Y6_GPIO_NUM;
config.pin_d5 = Y7_GPIO_NUM;
config.pin_d6 = Y8_GPIO_NUM;
config.pin_d7 = Y9_GPIO_NUM;
config.pin_xclk = XCLK_GPIO_NUM;
config.pin_pclk = PCLK_GPIO_NUM;
config.pin_vsync = VSYNC_GPIO_NUM;
config.pin_href = HREF_GPIO_NUM;
config.pin_sscb_sda = SIOD_GPIO_NUM;
config.pin_sscb_scl = SIOC_GPIO_NUM;
config.xclk_freq_hz = 20000000;
config.pixel_format = PIXFORMAT_JPEG;
// 初始化相机
esp_err_t err = esp_camera_init(&config);
if (err != ESP_OK) {
ESP_LOGE(TAG, "Camera init failed with error 0x%x", err);
return;
}
// 获取图像数据
camera_fb_t *fb = esp_camera_fb_get();
if (!fb) {
ESP_LOGE(TAG, "Camera capture failed");
return;
}
// fb->buf 是图像数据,大小为 fb->len
// 处理图像数据...
esp_camera_fb_return(fb); // 释放图像数据
}
```
以上两种方式可以获取JPEG格式的图像数据,如果需要获取其他格式的数据(如BMP、PNG等),可以通过使用相应的库进行转换。