Arduino環境でESP32-CAMを使う

#include <Arduino.h>
#include <Wire.h>
#include <SPI.h>
#include <Adafruit_GFX.h>    // Core graphics library
#include <Adafruit_ST7735.h> // Hardware-specific library for ST7735
#include <TJpg_Decoder.h>

#include "esp_camera.h"
#define CAMERA_MODEL_AI_THINKER // Has PSRAM

#include "camera_pins.h"

#define TFT_MOSI 13
#define TFT_SCLK 14
#define TFT_CS   15  // Chip select control pin
#define TFT_DC    2  // Data Command control pin
#define TFT_RST   12

#define PIN_BTN 16

Adafruit_ST7735 tft = Adafruit_ST7735(&SPI, TFT_CS, TFT_DC, TFT_RST);

bool tft_output(int16_t x, int16_t y, uint16_t w, uint16_t h, uint16_t* bitmap)
{
   // Stop further decoding as image is running off bottom of screen
  if ( y >= tft.height() ) return 0;
   tft.drawRGBBitmap(x, y, bitmap, w, h);
   // Return 1 to decode next block
   return 1;
}


void init_camera() {
  camera_config_t config;
  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.pixel_format = PIXFORMAT_JPEG;

  if(psramFound()){
    config.frame_size = FRAMESIZE_QQVGA;
    config.jpeg_quality = 10;
    config.fb_count = 1;
    Serial.println("PSRAM");
  } else {
    config.frame_size = FRAMESIZE_QQVGA;
    config.jpeg_quality = 12;
    config.fb_count = 1;
  }

  #if defined(CAMERA_MODEL_ESP_EYE)
    pinMode(13, INPUT_PULLUP);
    pinMode(14, INPUT_PULLUP);
  #endif

  esp_err_t err = esp_camera_init(&config);
  if (err != ESP_OK) {
    Serial.printf("Camera init failed with error 0x%x", err);

    for(;;)
    {

    }

  }

  sensor_t * s = esp_camera_sensor_get();
  // initial sensors are flipped vertically and colors are a bit saturated
  if (s->id.PID == OV3660_PID) {
    Serial.println("PID");
    s->set_vflip(s, 1);
    s->set_brightness(s, 2);
    s->set_saturation(s, 0); 
  }
}

void setup() {
  Serial.begin(115200);
  delay(1000);
  Serial.println("ESP32-CAM Picture");
  SPI.begin(TFT_SCLK, -1, TFT_MOSI, TFT_CS);
  tft.initR(INITR_BLACKTAB); 
  
  tft.setRotation(1);
  tft.fillScreen(ST77XX_BLACK);
  init_camera();

  tft.setCursor(20, 50);
  tft.setTextColor(ST77XX_RED);
  tft.setTextSize(2);
  tft.println("DEADBEEF");

  pinMode(PIN_BTN, INPUT);

  TJpgDec.setJpgScale(1);

  TJpgDec.setCallback(tft_output);
}

void take_picture(){

  camera_fb_t * fb = NULL;

  fb = esp_camera_fb_get();
  if (!fb) {
      Serial.println("Camera capture failed");
      return;
  }

  uint16_t w = 0, h = 0;
  TJpgDec.getJpgSize(&w, &h, fb->buf, fb->len);
  TJpgDec.drawJpg(0, 0, fb->buf, fb->len);     
  esp_camera_fb_return(fb);
}   

void loop() {

  while (true) {
     int state = digitalRead(PIN_BTN);
     if (state == LOW) {
       take_picture();
     }
  }
}