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#include "esp_camera.h"
#include <TFT_eSPI.h> // Hardware-specific library
#include <SPI.h>

#define CAMERA_MODEL_AI_THINKER

#define PWDN_GPIO_NUM     32
#define RESET_GPIO_NUM    -1
#define XCLK_GPIO_NUM      0
#define SIOD_GPIO_NUM     26
#define SIOC_GPIO_NUM     27
#define Y9_GPIO_NUM       35
#define Y8_GPIO_NUM       34
#define Y7_GPIO_NUM       39
#define Y6_GPIO_NUM       36
#define Y5_GPIO_NUM       21
#define Y4_GPIO_NUM       19
#define Y3_GPIO_NUM       18
#define Y2_GPIO_NUM        5
#define VSYNC_GPIO_NUM    25
#define HREF_GPIO_NUM     23
#define PCLK_GPIO_NUM     22

TFT_eSPI tft = TFT_eSPI();       // Invoke custom library
TFT_eSprite spr = TFT_eSprite(&tft);

camera_config_t config;

unsigned long initalTime;
unsigned long frameTime = 1;
uint16_t *scr;

//////////////////////////////////////////////////////////
void setup() {

  // Serial.begin(115200);

  tft.init();
  tft.setRotation(0);
  tft.fillScreen(TFT_BLACK);
  tft.setTextColor(TFT_BLACK, TFT_WHITE);
  scr = (uint16_t*)spr.createSprite(240, 240);

  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.pin_pwdn = PWDN_GPIO_NUM;
  config.pin_reset = RESET_GPIO_NUM;
  config.xclk_freq_hz = 20000000;
  config.frame_size = FRAMESIZE_240X240;
  config.pixel_format = PIXFORMAT_RGB565;
  config.grab_mode = CAMERA_GRAB_LATEST;
  config.fb_location = CAMERA_FB_IN_PSRAM;
  config.jpeg_quality = 12;
  config.fb_count = 2;

  esp_err_t err = esp_camera_init(&config);

  sensor_t * s = esp_camera_sensor_get();
  s->set_brightness(s, 0);     // -2 to 2
  s->set_contrast(s, 0);       // -2 to 2
  s->set_saturation(s, 0);     // -2 to 2
  s->set_special_effect(s, 0); // 0 to 6 (0 - No Effect, 1 - Negative, 2 - Grayscale, 3 - Red Tint, 4 - Green Tint, 5 - Blue Tint, 6 - Sepia)
  s->set_whitebal(s, 1);       // 0 = disable , 1 = enable
  s->set_awb_gain(s, 1);       // 0 = disable , 1 = enable
  s->set_wb_mode(s, 0);        // 0 to 4 - if awb_gain enabled (0 - Auto, 1 - Sunny, 2 - Cloudy, 3 - Office, 4 - Home)
  s->set_exposure_ctrl(s, 1);  // 0 = disable , 1 = enable
  s->set_aec2(s, 0);           // 0 = disable , 1 = enable
  s->set_ae_level(s, 0);       // -2 to 2
  s->set_aec_value(s, 300);    // 0 to 1200
  s->set_gain_ctrl(s, 1);      // 0 = disable , 1 = enable
  s->set_agc_gain(s, 0);       // 0 to 30
  s->set_gainceiling(s, (gainceiling_t)0);  // 0 to 6
  s->set_bpc(s, 0);            // 0 = disable , 1 = enable
  s->set_wpc(s, 1);            // 0 = disable , 1 = enable
  s->set_raw_gma(s, 1);        // 0 = disable , 1 = enable
  s->set_lenc(s, 1);           // 0 = disable , 1 = enable
  s->set_hmirror(s, 0);        // 0 = disable , 1 = enable
  s->set_vflip(s, 0);          // 0 = disable , 1 = enable
  s->set_dcw(s, 1);            // 0 = disable , 1 = enable
  s->set_colorbar(s, 0);       // 0 = disable , 1 = enable

  tft.setTextColor(TFT_WHITE);
  tft.drawString("Loading...", 105, 105, 2);
  delay(1000);

}
//////////////////////////////////
void loop() {
  initalTime = millis();

  //take picture
  camera_fb_t  * fb = NULL;
  fb = esp_camera_fb_get();


  for (size_t i = 0; i < 57600; i++) {    //240x240px = 57600
    //create 16 bit colour from two bytes.
    byte first_byte = fb->buf[i * 2];
    byte second_byte = fb->buf[i * 2 + 1];
    scr[i] = (second_byte << 8) + first_byte;
  }
  //int fps = 1000 / frameTime;
  spr.drawString(String(frameTime), 100, 20, 2); //print frame time in milliseconds
  spr.drawString("ms", 125, 20, 2);
  spr.pushSprite(0, 0);

  //  Serial.print("Frame time(ms) = "); Serial.println(frameTime);
  esp_camera_fb_return(fb);   //return the frame buffer back to the driver for reuse
  frameTime = millis() - initalTime;
}