ESP32-CAM+OLED

超、凢脫俗 2021-10-29 17:52 563阅读 0赞

OLED引脚使用IIC协议：

*  SCL：PIN14
 *  SDA：PIN15

#include <WiFi.h>
    #include "esp_http_server.h"
    #include "esp_camera.h"
    #include "SSD1306.h"
    
    SSD1306 display(0x3c, 15, 14);
    
    const char* ssid = "wxy2018";
    const char* password = "wxy168168";
    
    #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
    
    #define PART_BOUNDARY "123456789000000000000987654321"
    static const char* _STREAM_CONTENT_TYPE = "multipart/x-mixed-replace;boundary=" PART_BOUNDARY;
    static const char* _STREAM_BOUNDARY = "\r\n--" PART_BOUNDARY "\r\n";
    static const char* _STREAM_PART = "Content-Type: image/jpeg\r\nContent-Length: %u\r\n\r\n";
    
    httpd_handle_t stream_httpd = NULL;
    httpd_handle_t camera_httpd = NULL;
    
    static esp_err_t stream_handler(httpd_req_t *req){ 
        camera_fb_t * fb = NULL;
        esp_err_t res = ESP_OK;
        size_t _jpg_buf_len = 0;
        uint8_t * _jpg_buf = NULL;
        char * part_buf[64];
    
        res = httpd_resp_set_type(req, _STREAM_CONTENT_TYPE);
        if(res != ESP_OK){ 
            return res;
        }
        
        sensor_t * s = esp_camera_sensor_get();
        s->set_vflip(s, 1);
        s->set_framesize(s, FRAMESIZE_VGA);    
        s->set_quality(s, 10);
        while(true){ 
            fb = esp_camera_fb_get();
            if (!fb) { 
                Serial.println("Camera capture failed");
                res = ESP_FAIL;
            } else { 
                _jpg_buf_len = fb->len;
                _jpg_buf = fb->buf; 
            }
            if(res == ESP_OK){ 
                size_t hlen = snprintf((char *)part_buf, 64, _STREAM_PART, _jpg_buf_len);
                res = httpd_resp_send_chunk(req, (const char *)part_buf, hlen);
            }
            if(res == ESP_OK){ 
                res = httpd_resp_send_chunk(req, (const char *)_jpg_buf, _jpg_buf_len);
            }
            if(res == ESP_OK){ 
                res = httpd_resp_send_chunk(req, _STREAM_BOUNDARY, strlen(_STREAM_BOUNDARY));
            }
            if(fb){ 
                esp_camera_fb_return(fb);
                fb = NULL;
                _jpg_buf = NULL;
            } else if(_jpg_buf){ 
                free(_jpg_buf);
                _jpg_buf = NULL;
            }
            if(res != ESP_OK){ 
                break;
            }
        }
        return res;
    }
    
    void start_camera_server(void)
    { 
        httpd_config_t config = HTTPD_DEFAULT_CONFIG();
      
        httpd_uri_t    stream_uri = { 
          .uri         = "/stream",
          .method      = HTTP_GET,
          .handler     = stream_handler,
          .user_ctx    = NULL
        };
        
          config.server_port += 1;
          config.ctrl_port += 1;
          Serial.printf("Starting stream server on port: '%d'/stream\n", config.server_port);
          if (httpd_start(&stream_httpd, &config) == ESP_OK) { 
              httpd_register_uri_handler(stream_httpd, &stream_uri);
          }
    }
    
    
    void setup() { 
      Serial.begin(115200);
      Serial.setDebugOutput(true);
      Serial.println();
      
      display.init();
    
      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_UXGA;
          config.jpeg_quality = 10;
          config.fb_count = 2;
        } else { 
          config.frame_size = FRAMESIZE_SVGA;
          config.jpeg_quality = 12;
          config.fb_count = 1;
        }
      
        // camera init
        esp_err_t err = esp_camera_init(&config);
        if (err != ESP_OK) { 
          Serial.printf("Camera init failed with error 0x%x", err);
          return;
        }
      
        //drop down frame size for higher initial frame rate
        sensor_t * s = esp_camera_sensor_get();
        s->set_framesize(s, FRAMESIZE_QVGA);
      
        WiFi.begin(ssid, password);
        while (WiFi.status() != WL_CONNECTED) { 
          delay(500);
          Serial.print(".");
        }
        Serial.println("");
        Serial.println("WiFi connected");
      
        start_camera_server();
      
        Serial.print("Camera Ready! Use 'http://");
        Serial.print(WiFi.localIP());
        Serial.println(":81/stream' to connect");
    
      display.setFont(ArialMT_Plain_24);
      display.drawString(0, 0, "Hello World");
      display.display();
    }
    
    void loop() { 
     delay(10);
    }