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#include "esp_camera.h"
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#include "Arduino.h"
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#include "FS.h"
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#include "SD_MMC.h"
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#include "soc/soc.h"           // 解决掉电检测问题
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#include "soc/rtc_cntl_reg.h"  // 解决掉电检测问题
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#include <EEPROM.h>            // 用于持久化照片编号
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#define EEPROM_SIZE 1
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// AI-Thinker ESP32-CAM 引脚定义
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#define PWDN_GPIO_NUM     32
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#define RESET_GPIO_NUM    -1
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#define XCLK_GPIO_NUM      0
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#define SIOD_GPIO_NUM     26
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#define SIOC_GPIO_NUM     27
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#define Y9_GPIO_NUM       35
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#define Y8_GPIO_NUM       34
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#define Y7_GPIO_NUM       39
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#define Y6_GPIO_NUM       36
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#define Y5_GPIO_NUM       21
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#define Y4_GPIO_NUM       19
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#define Y3_GPIO_NUM       18
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#define Y2_GPIO_NUM        5
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#define VSYNC_GPIO_NUM    25
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#define HREF_GPIO_NUM     23
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#define PCLK_GPIO_NUM     22
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int pictureNumber = 0;
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void setup() {
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  WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG, 0); // 关闭掉电检测，防止电压瞬降导致重启
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  Serial.begin(115200);
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  // 摄像头配置
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  camera_config_t config;
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  config.ledc_channel = LEDC_CHANNEL_0;
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  config.ledc_timer = LEDC_TIMER_0;
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  config.pin_d0 = Y2_GPIO_NUM;
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  config.pin_d1 = Y3_GPIO_NUM;
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  config.pin_d2 = Y4_GPIO_NUM;
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  config.pin_d3 = Y5_GPIO_NUM;
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  config.pin_d4 = Y6_GPIO_NUM;
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  config.pin_d5 = Y7_GPIO_NUM;
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  config.pin_d6 = Y8_GPIO_NUM;
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  config.pin_d7 = Y9_GPIO_NUM;
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  config.pin_xclk = XCLK_GPIO_NUM;
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  config.pin_pclk = PCLK_GPIO_NUM;
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  config.pin_vsync = VSYNC_GPIO_NUM;
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  config.pin_href = HREF_GPIO_NUM;
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  config.pin_sscb_sda = SIOD_GPIO_NUM;
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  config.pin_sscb_scl = SIOC_GPIO_NUM;
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  config.pin_pwdn = PWDN_GPIO_NUM;
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  config.pin_reset = RESET_GPIO_NUM;
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  config.xclk_freq_hz = 20000000;
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  config.pixel_format = PIXFORMAT_JPEG;
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  // 根据内存情况调整图片质量
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  if(psramFound()){
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    config.frame_size = FRAMESIZE_UXGA; // 1600x1200
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    config.jpeg_quality = 10;
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    config.fb_count = 2;
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  } else {
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    config.frame_size = FRAMESIZE_SVGA;
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    config.jpeg_quality = 12;
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    config.fb_count = 1;
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  }
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  // 初始化摄像头
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  esp_err_t err = esp_camera_init(&config);
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  if (err != ESP_OK) {
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    Serial.printf("Camera init failed, 0x%x", err);
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    return;
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  }
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  // 初始化 SD 卡 (使用 1-线模式以节省功耗/引脚)
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  if(!SD_MMC.begin("/sdcard", true)){
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    Serial.println("SD Card Mount Failed");
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    return;
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  }
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}
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void take_picture() {
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  camera_fb_t * fb = esp_camera_fb_get();
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  if(!fb) {
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    Serial.println("Capture failed");
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    return;
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  }
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  // 读取并更新编号
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  EEPROM.begin(EEPROM_SIZE);
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  pictureNumber = EEPROM.read(0) + 1;
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  String path = "/pic_" + String(pictureNumber) + ".jpg";
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  fs::FS &fs = SD_MMC;
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  File file = fs.open(path.c_str(), FILE_WRITE);
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  if(!file){
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    Serial.println("Failed to open file in writing mode");
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  } else {
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    file.write(fb->buf, fb->len);
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    Serial.printf("Saved: %s\n", path.c_str());
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    EEPROM.write(0, pictureNumber);
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    EEPROM.commit();
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  }
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  file.close();
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  esp_camera_fb_return(fb);
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}
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void loop() {
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  take_picture();
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  delay(10000); // 每 10 秒拍摄一次
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}