ESP32 Forum

Posted: **Sat Jan 07, 2023 8:49 pm**

Hi,

below is my code which already worked. Unfortunately now I get this error.

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CORRUPT HEAP: Bad head at 0x3f85dc2c. Expected 0xabba1234 got 0x3f9ffff4
abort() was called at PC 0x4008a41d on core 1

ELF file SHA256: 0000000000000000

Backtrace: 0x4008de14:0x3ffdca10 0x4008e08d:0x3ffdca30 0x4008a41d:0x3ffdca50 0x4008a549:0x3ffdca80 0x400fd3db:0x3ffdcaa0 0x400f8eb5:0x3ffdcd60 0x400f8dbd:0x3ffdcdb0 0x400933dd:0x3ffdcde0 0x40082746:0x3ffdce00 0x4008a315:0x3ffdce20 0x4000bec7:0x3ffdce40 0x400d1152:0x3ffdce60 0x4011b9dd:0x3ffdcf80 0x4011c535:0x3ffdcfb0 0x4011c5ed:0x3ffdd040 0x4011bc48:0x3ffdd060 0x4011acc0:0x3ffdd080 0x4011ad17:0x3ffdd0c0 0x4008fd1e:0x3ffdd0e0

Rebooting...
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Code: [Select all] [Expand/Collapse]

#include "esp_camera.h"
#include <WiFi.h>
#include "soc/soc.h"
#include "soc/rtc_cntl_reg.h"
#include <LITTLEFS.h>
#include <FS.h>
#include "esp_timer.h"
#include "Arduino.h"
#include "fb_gfx.h"
#include "esp_http_server.h"
 
#define led 33
#define PART_BOUNDARY "123456789000000000000987654321"
 
const char* ssid = "Mi Casa";
const char* password = "W1xldgmnuweadWs!";
 
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;
 
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;
  }
 
  while(true){
    fb = esp_camera_fb_get();
    _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));
    }
 
    esp_camera_fb_return(fb);
    fb = NULL;
    free(_jpg_buf);
    _jpg_buf = NULL;
 
    if(res != ESP_OK){
      break;
    }
  }
  return res;
}
 
void startCameraServer(){
  httpd_config_t config = HTTPD_DEFAULT_CONFIG();
  config.server_port = 80;
 
  httpd_uri_t index_uri = {
    .uri       = "/",
    .method    = HTTP_GET,
    .handler   = stream_handler,
    .user_ctx  = NULL
  };
  
  Serial.printf("Starting web server on port: '%d'\n", config.server_port);
  if (httpd_start(&stream_httpd, &config) == ESP_OK) {
    httpd_register_uri_handler(stream_httpd, &index_uri);
  }
}
 
void setup() 
{
  WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG, 0); // prevent brownouts by silencing them
  
  Serial.begin(115200);
  Serial.setDebugOutput(true);
  Serial.println();
  pinMode(led, OUTPUT);
 
  LITTLEFS.begin(true);
 
  WiFi.begin(ssid, password);
  Serial.print("WLAN Verbindungsaufbau...");
  while (WiFi.status() != WL_CONNECTED) 
  {
      Serial.print(".");
      delay(200);
  } 
  Serial.println();
  Serial.println("Verbunden");
  Serial.print("IP-Adresse: ");
  Serial.println(WiFi.localIP());
  
  camera_config_t config;
  config.ledc_channel = LEDC_CHANNEL_0;
  config.ledc_timer = LEDC_TIMER_0;
  config.pin_d0 = 5;
  config.pin_d1 = 18;
  config.pin_d2 = 19;
  config.pin_d3 = 21;
  config.pin_d4 = 36;
  config.pin_d5 = 39;
  config.pin_d6 = 34;
  config.pin_d7 = 35;
  config.pin_xclk = 0;
  config.pin_pclk = 22;
  config.pin_vsync = 25;
  config.pin_href = 23;
  config.pin_sscb_sda = 26;
  config.pin_sscb_scl = 27;
  config.pin_pwdn = 32;
  config.pin_reset = -1;
  config.xclk_freq_hz = 20000000;
  config.pixel_format = PIXFORMAT_JPEG;
  config.frame_size = FRAMESIZE_UXGA;
  config.jpeg_quality = 10;
  config.fb_count = 2;
 
  esp_err_t err = esp_camera_init(&config);
  if (err != ESP_OK) {
    Serial.printf("Camera init failed with error 0x%x", err);
    return;
  }
  else {
    Serial.println("Camera initialisiert.");
  }
 
  sensor_t * s = esp_camera_sensor_get();
  s->set_framesize(s, FRAMESIZE_UXGA);
  s->set_vflip(s, 0);
  s->set_hmirror(s, 0);
 
  startCameraServer();
 
}
 
 
void loop() 
{
  delay(1000);
}
 

GeSHi © Codebox Plus Extension

Posted: **Sun Jan 08, 2023 3:04 am**

You're free()'ing _jpg_buf while you do not own the memory it points to (it's a pointer to a member of fb, and that memory gets freed with esp_camera_fb_return())

Posted: **Sun Jan 08, 2023 1:03 pm**

Hi,

Thanks for your reply. That‘s it!

Greetings.

PS: Now I just have to find out how to close this post

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