ESP32-CAM与TFT连接

您好，您想了解关于ESP32-CAM和TFT的连接吗？ESP32-CAM是一款集成了摄像头和Wi-Fi功能的开发板，而TFT是一种液晶显示屏技术。它们可以通过SPI总线进行连接。您可以将TFT的MI接口连接到ESP32-CAM的IO13-IO15接口，将CLK连接到IO14，将CS连接到IO5，将D/C连接到IO4，将RST连接到IO2，即可实现连接。当然，具体实现还需要根据不同的硬件和软件进行设置和调试。希望以上信息能对您有所帮助。

相关问题

给我提供一份esp32-cam 拍照并且通过st7735显示屏显示出来的代码

以下是一个简单的示例代码，演示如何使用ESP32-CAM拍照并将其显示在ST7735显示屏上。在运行此代码之前，请确保您已正确连接ESP32-CAM和ST7735显示屏，并已安装必要的库。

#include <WiFi.h>
#include "esp_camera.h"
#include <Adafruit_ST7735.h>

// Replace with your network credentials
const char* ssid = "your_SSID";
const char* password = "your_PASSWORD";

// Pin definition for ST7735 display
#define TFT_CS    15
#define TFT_RST   -1
#define TFT_DC    2
#define TFT_MOSI  23
#define TFT_SCLK  18

// Initialize ST7735 display
Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS, TFT_DC, TFT_MOSI, TFT_SCLK, TFT_RST);

// Camera pins
#define CAM_PIN_CLK 4
#define CAM_PIN_SIOD 13
#define CAM_PIN_SIOC 14
#define CAM_PIN_VSYNC 5
#define CAM_PIN_HREF 27
#define CAM_PIN_PWDN -1
#define CAM_PIN_XCLK 21
#define CAM_PIN_D7 35
#define CAM_PIN_D6 34
#define CAM_PIN_D5 39
#define CAM_PIN_D4 36
#define CAM_PIN_D3 19
#define CAM_PIN_D2 18
#define CAM_PIN_D1 33
#define CAM_PIN_D0 32
#define CAM_PIN_RESET -1

// Initialize camera
void initCamera() {
  camera_config_t config;
  config.ledc_channel = LEDC_CHANNEL_0;
  config.ledc_timer = LEDC_TIMER_0;
  config.pin_d0 = CAM_PIN_D0;
  config.pin_d1 = CAM_PIN_D1;
  config.pin_d2 = CAM_PIN_D2;
  config.pin_d3 = CAM_PIN_D3;
  config.pin_d4 = CAM_PIN_D4;
  config.pin_d5 = CAM_PIN_D5;
  config.pin_d6 = CAM_PIN_D6;
  config.pin_d7 = CAM_PIN_D7;
  config.pin_xclk = CAM_PIN_XCLK;
  config.pin_pclk = -1;
  config.pin_vsync = CAM_PIN_VSYNC;
  config.pin_href = CAM_PIN_HREF;
  config.pin_sscb_sda = CAM_PIN_SIOD;
  config.pin_sscb_scl = CAM_PIN_SIOC;
  config.pin_pwdn = CAM_PIN_PWDN;
  config.pin_reset = CAM_PIN_RESET;
  config.xclk_freq_hz = 20000000;
  config.pixel_format = PIXFORMAT_JPEG;
  config.frame_size = FRAMESIZE_SVGA;
  config.jpeg_quality = 10;
  config.fb_count = 1;
  esp_err_t err = esp_camera_init(&config);
  if (err != ESP_OK) {
    Serial.printf("Camera init failed with error 0x%x", err);
  }
}

void setup() {
  Serial.begin(115200);

  // Initialize ST7735 display
  tft.initR(INITR_BLACKTAB);
  tft.setRotation(3);

  // Connect to Wi-Fi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }

  // Initialize camera
  initCamera();
}

void loop() {
  // Take photo
  camera_fb_t* fb = esp_camera_fb_get();
  if (!fb) {
    Serial.println("Camera capture failed");
    return;
  }

  // Display photo on ST7735 display
  tft.fillScreen(ST7735_BLACK);
  tft.drawRGBBitmap(0, 0, (uint16_t*)fb->buf, fb->width, fb->height);
  tft.setCursor(0, 0);
  tft.setTextColor(ST7735_WHITE);
  tft.setTextSize(2);
  tft.printf("ESP32-CAM");

  // Release memory
  esp_camera_fb_return(fb);

  delay(5000); // Wait 5 seconds before taking another photo
}

请注意，此示例代码仅在带有ST7735显示屏的ESP32-CAM上进行了测试。如果您的ESP32-CAM具有不同的硬件配置，则可能需要进行适当的修改。

给我提供一份esp32-cam 并且通过st7735显示屏显示视频流的代码

好的，以下是一份esp32-cam通过st7735显示屏显示视频流的代码：

#include <WiFi.h>
#include <WiFiClient.h>
#include <WebSocketsServer.h>
#include <WebServer.h>
#include <ESPmDNS.h>
#include <EEPROM.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_ST7735.h>
#include "camera_pins.h"
#include "esp_camera.h"

#define ST7735_CS  15
#define ST7735_DC  2
#define ST7735_RST 4

// Replace with your network credentials
const char* ssid = "your_SSID";
const char* password = "your_PASSWORD";

// Create an instance of the server
WebServer server(80);
WebSocketsServer webSocket = WebSocketsServer(81);

// Create ST7735 object
Adafruit_ST7735 tft = Adafruit_ST7735(ST7735_CS, ST7735_DC, ST7735_RST);

// Camera config
camera_config_t config;
bool isStreaming = false;

void handleWebSocketMessage(uint8_t *payload, size_t length) {
  if (!isStreaming) {
    return;
  }
  // Send image frame to all connected clients
  webSocket.broadcastBIN(payload, length);
}

void startCameraServer() {
  // Camera configuration
  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;
  // Reduce image quality to improve streaming performance
  config.frame_size = FRAMESIZE_VGA;
  config.jpeg_quality = 12;
  config.fb_count = 1;

  // Initialize camera
  esp_err_t err = esp_camera_init(&config);
  if (err != ESP_OK) {
    Serial.printf("Camera init failed with error 0x%x", err);
    return;
  }
  Serial.println("Camera initialized");

  // Start streaming from camera
  isStreaming = true;

  // Start web socket server
  webSocket.begin();
  webSocket.onMessage(handleWebSocketMessage);
  Serial.println("WebSocket server started");

  // Start HTTP server
  server.on("/", HTTP_GET, []() {
    server.send(200, "text/html", "<html><body><h1>ESP32-CAM Video Stream</h1><img src=\"http://" + WiFi.localIP().toString() + ":80/stream\" /></body></html>");
  });
  server.on("/stream", HTTP_GET, []() {
    if (!isStreaming) {
      server.send(503, "text/plain", "Camera stream not available");
      return;
    }
    server.sendHeader("Access-Control-Allow-Origin", "*");
    server.sendHeader("Cache-Control", "no-cache, no-store, must-revalidate");
    server.sendHeader("Pragma", "no-cache");
    server.sendHeader("Expires", "0");
    server.sendHeader("Content-Type", "multipart/x-mixed-replace; boundary=frame");
  });
  server.begin();
  Serial.println("HTTP server started");
}

void setup() {
  Serial.begin(115200);
  // Initialize EEPROM
  EEPROM.begin(512);
  // Connect to Wi-Fi network
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");
  // Start camera server
  startCameraServer();
  // Initialize ST7735
  tft.initR(INITR_BLACKTAB);
}

void loop() {
  // Handle web socket events
  webSocket.loop();
  // Handle HTTP requests
  server.handleClient();
  // Display streaming video on ST7735
  if (isStreaming) {
    camera_fb_t *fb = esp_camera_fb_get();
    if (fb) {
      tft.pushImage(0, 0, fb->width, fb->height, fb->format == PIXFORMAT_GRAYSCALE ? (uint8_t *)fb->buf : NULL);
      esp_camera_fb_return(fb);
    }
  }
}

你可以将代码上传到esp32-cam板子中，然后使用浏览器访问`http://esp32-cam-local-ip/stream`来查看视频流。