ESP32-Cam--获取图像定时写入SD卡

﹏ヽ暗。殇╰゛Y 2023-06-20 06:18 10阅读 0赞

#include <esp_event_loop.h>
    #include <esp_log.h>
    #include <esp_system.h>
    #include <nvs_flash.h>
    #include <sys/param.h>
    
    #include "freertos/FreeRTOS.h"
    #include "freertos/task.h"
    
    #include "driver/sdmmc_host.h"
    #include "driver/sdmmc_defs.h"
    #include "sdmmc_cmd.h"
    #include "esp_vfs_fat.h"
    
    #include "esp_camera.h"
    
    static const char *TAG = "example:sd_jpg";
    
    static camera_config_t camera_config = { 
        .pin_pwdn = -1,
        .pin_reset = CONFIG_RESET,
        .pin_xclk = CONFIG_XCLK,
        .pin_sscb_sda = CONFIG_SDA,
        .pin_sscb_scl = CONFIG_SCL,
    
        .pin_d7 = CONFIG_D7,
        .pin_d6 = CONFIG_D6,
        .pin_d5 = CONFIG_D5,
        .pin_d4 = CONFIG_D4,
        .pin_d3 = CONFIG_D3,
        .pin_d2 = CONFIG_D2,
        .pin_d1 = CONFIG_D1,
        .pin_d0 = CONFIG_D0,
        .pin_vsync = CONFIG_VSYNC,
        .pin_href = CONFIG_HREF,
        .pin_pclk = CONFIG_PCLK,
    
        //XCLK 20MHz or 10MHz
        .xclk_freq_hz = CONFIG_XCLK_FREQ,
        .ledc_timer = LEDC_TIMER_0,
        .ledc_channel = LEDC_CHANNEL_0,
    
        .pixel_format = PIXFORMAT_JPEG, //YUV422,GRAYSCALE,RGB565,JPEG
        .frame_size = FRAMESIZE_UXGA,   //QQVGA-UXGA Do not use sizes above QVGA when not JPEG
    
        .jpeg_quality = 12, //0-63 lower number means higher quality
        .fb_count = 1       //if more than one, i2s runs in continuous mode. Use only with JPEG
    };
    
    static esp_err_t init_camera()
    { 
      //initialize the camera
      esp_err_t err = esp_camera_init(&camera_config);
      if (err != ESP_OK)
      { 
        ESP_LOGE(TAG, "Camera Init Failed");
        return err;
      }
    
      return ESP_OK;
    }
    
    static void init_sdcard()
    { 
      esp_err_t ret = ESP_FAIL;
      sdmmc_host_t host = SDMMC_HOST_DEFAULT();
      sdmmc_slot_config_t slot_config = SDMMC_SLOT_CONFIG_DEFAULT();
      esp_vfs_fat_sdmmc_mount_config_t mount_config = { 
          .format_if_mount_failed = false,
          .max_files = 3,
      };
      sdmmc_card_t *card;
    
      ESP_LOGI(TAG, "Mounting SD card...");
      ret = esp_vfs_fat_sdmmc_mount("/sdcard", &host, &slot_config, &mount_config, &card);
    
      if (ret == ESP_OK)
      { 
        ESP_LOGI(TAG, "SD card mount successfully!");
      }
      else
      { 
        ESP_LOGE(TAG, "Failed to mount SD card VFAT filesystem. Error: %s", esp_err_to_name(ret));
      }
    }
    
    void app_main()
    { 
      init_sdcard();
      init_camera();
    
      while (1)
      { 
        ESP_LOGI(TAG, "Taking picture...");
        camera_fb_t *pic = esp_camera_fb_get();
        int64_t timestamp = esp_timer_get_time();
    
        char *pic_name = malloc(17 + sizeof(int64_t));
        sprintf(pic_name, "/sdcard/pic_%lli.jpg", timestamp);
        FILE *file = fopen(pic_name, "w");
        if (file != NULL)
        { 
          size_t err = fwrite(pic->buf, 1, pic->len, file);
          ESP_LOGI(TAG, "File saved: %s", pic_name);
        }
        else
        { 
          ESP_LOGE(TAG, "Could not open file =(");
        }
        fclose(file);
        free(pic_name);
    
        vTaskDelay(20000 / portTICK_RATE_MS);
      }
    }

这是引脚配置文件：

config XCLK_FREQ
      int "XCLK Frequency"
      default "20000000"
      help
          The XCLK Frequency in Herz.
          
    menu "Pin Configuration"
      config D0
        int "D0"
        default "5"
      config D1
        int "D1"
        default "18"
      config D2
        int "D2"
        default "19"
      config D3
        int "D3"
        default "21"
      config D4
        int "D4"
        default "36"
      config D5
        int "D5"
        default "39"
      config D6
        int "D6"
        default "34"
      config D7
        int "D7"
        default "35"
      config XCLK
        int "XCLK"
        default "0"
      config PCLK
        int "PCLK"
        default "22"
      config VSYNC
        int "VSYNC"
        default "25"
      config HREF
        int "HREF"
        default "23"
      config SDA
        int "SDA"
        default "26"
      config SCL
        int "SCL"
        default "27"
      config RESET
        int "RESET"
        default "32"
    endmenu
    	
    endmenu