ESP32-CAM Video Streaming Server Подключение I2C и SPI дисплеев

ESP32-CAM Video Streaming Server

I2C 128x64 Blue OLED Display

#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin)

Adafruit_SSD1306 display;

void init_display(){
    pinMode(14,INPUT_PULLUP);
    pinMode(15,INPUT_PULLUP);
    Wire.begin(14,15);
    display = Adafruit_SSD1306(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3D for 128x64
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }

    ....

#define BACKCOLOR 0x0000 // Black
#define PIXELCOLOR 0xFFFF  // White

#define FRAME_WIDTH 320
#define FRAME_HEIGHT 240

uint16_t pixel_color = 0;

esp_err_t camera_capture(){
    //acquire a frame
    camera_fb_t * fb = esp_camera_fb_get();
    if (!fb) {
        ESP_LOGE(TAG, "Camera Capture Failed");
        return ESP_FAIL;
    }
  int i = 0;
  
  for(int y = 0; y < SCREEN_HEIGHT; y++){
    for(int x = 0; x < SCREEN_WIDTH; x++){
      i = y * FRAME_WIDTH + x; // FRAMESIZE_QVGA // 320x240
      char ch = (char)fb->buf[i];

      if (ch > 128)
         pixel_color = WHITE;
      else 
         pixel_color = BLACK;

      // Draw a single pixel in white 
      display.drawPixel(x, y, pixel_color);
     }
  }
    display.display();

    //return the frame buffer back to the driver for reuse
    esp_camera_fb_return(fb);
    Serial.println("Capture frame ok.");
    return ESP_OK;
}

SPI Display 1.8" TFT 128*160 Espressif библиотека

// Configuration for other boards, set the correct values for the display used
//----------------------------------------------------------------------------
#define DISP_COLOR_BITS_24	0x66
//#define DISP_COLOR_BITS_16	0x55  // Do not use!

// #############################################
// ### Set to 1 for some displays,           ###
//     for example the one on ESP-WROWER-KIT ###
// #############################################
#define TFT_INVERT_ROTATION 0
#define TFT_INVERT_ROTATION1 0

// ################################################
// ### SET TO 0X00 FOR DISPLAYS WITH RGB MATRIX ###
// ### SET TO 0X08 FOR DISPLAYS WITH BGR MATRIX ###
// ### For ESP-WROWER-KIT set to 0x00           ###
// ################################################
#define TFT_RGB_BGR 0x08

// ##############################################################
// ### Define ESP32 SPI pins to which the display is attached ###
// ##############################################################

// The pins configured here are the native spi pins for HSPI interface
// Any other valid pin combination can be used
#define PIN_NUM_MISO 12		// SPI MISO
#define PIN_NUM_MOSI 13		// SPI MOSI
#define PIN_NUM_CLK  14		// SPI CLOCK pin
#define PIN_NUM_CS   15		// Display CS pin
#define PIN_NUM_DC   2		// Display command/data pin
#define PIN_NUM_TCS  0		// Touch screen CS pin (NOT used if USE_TOUCH=0)

// --------------------------------------------------------------
// ** Set Reset and Backlight pins to 0 if not used !
// ** If you want to use them, set them to some valid GPIO number
#define PIN_NUM_RST  0  	// GPIO used for RESET control

#define PIN_NUM_BCKL 0  	// GPIO used for backlight control
#define PIN_BCKL_ON  0  	// GPIO value for backlight ON
#define PIN_BCKL_OFF 1  	// GPIO value for backlight OFF
// --------------------------------------------------------------

// #######################################################
// Set this to 1 if you want to use touch screen functions
// #######################################################
#define USE_TOUCH	TOUCH_TYPE_NONE
// #######################################################

// #######################################################################
// Default display width (smaller dimension) and height (larger dimension)
// #######################################################################
#define DEFAULT_TFT_DISPLAY_WIDTH  128
#define DEFAULT_TFT_DISPLAY_HEIGHT 160
// #######################################################################

#define DEFAULT_GAMMA_CURVE 0
#define DEFAULT_SPI_CLOCK   32000000
#define DEFAULT_DISP_TYPE   DISP_TYPE_ST7735B
//----------------------------------------------------------------------------

#define TFT_INVERT_ROTATION         0
#define TFT_INVERT_ROTATION1        1
#define TFT_INVERT_ROTATION2        0 

+ CFLAGS += -Wno-error=tautological-compare \
+         -Wno-implicit-fallthrough \
+		  -Wno-implicit-function-declaration

+ #include "driver/gpio.h

esp_err_t camera_capture(){
    uint32_t tstart, t1, t2;
	tstart = clock();
    //acquire a frame
    camera_fb_t * fb = esp_camera_fb_get();
    if (!fb) {
        printf("Camera Capture Failed\n");
        return ESP_FAIL;
    }
    t1 = clock() - tstart;
    printf("Capture camera time: %u ms\r\n", t1);

    int i = 0, bufPos = 0;

    uint8_t hb, lb;
    color_t color;
    color_t *color_line = heap_caps_malloc(_width*3, MALLOC_CAP_DMA);

    tstart = clock();

    for(int y = 0; y < _height; y++)
    {
  	 bufPos = 0;
        for(int x = 0; x < _width; x++)
        {
            i = (y * FRAME_WIDTH + x) << 1;

            hb = fb->buf[i] ;
            lb = fb->buf[i + 1];
      
            color.r = (lb & 0x1F) << 3;
            color.g = (hb & 0x07) << 5 | (lb & 0xE0) >> 3;
            color.b =  hb & 0xF8;

            color_line[bufPos] = color;
            bufPos++;
//         TFT_drawPixel(0, 0, color, 1);
       }
       disp_select();
       send_data(0, y, _width-1, y, _width, color_line);
       wait_trans_finish(1);
       disp_deselect();
    }

    free(color_line);

    t1 = clock() - tstart;
    printf("Send buffer time: %u ms\r\n", t1);
    esp_camera_fb_return(fb);
    printf("Capture frame ok.\n");
    return ESP_OK;
}

// #if defined(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

void camera_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.fb_count = 2;

// for display
  config.frame_size = FRAMESIZE_QVGA;
  config.pixel_format = PIXFORMAT_RGB565;
  // camera init
  esp_err_t err = esp_camera_init(&config);
  if (err != ESP_OK) {
    printf("Camera init failed with error 0x%x", err);
    return;
  }

  printf("Camera init OK\n");
}

config.frame_size = FRAMESIZE_QVGA; // 320x240

#include "soc/rtc_cntl_reg.h"
...
WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG, 0); //disable brownout detector

Заключение