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Published 20 hours ago • verified publisher icon arkhipenko

ESP32 PANIC - Unhandled debug exception

Open jasonrepos opened this issue 2 years ago • 2 comments

Im looking for some help, I think its related to my lack of c++ knowledge and pointers. I have the below code (cutdown version of it) and whenever I include the dictionary code inside the RFID task ( ... if (d[rfid_uid.substring(1)] != "") ), the esp32 panic's with the below message. The panic only happens sporadically, after a random number of minutes of playing mp3's, so I think what is happening is my RFID task is trying to access the dictionary which was populated during the setup() function and possibly these memory addresses have now been overwritten? I thought that since I had created the dictionary in the global section, this would not be the case, but this is my lack of knowledge.

Do you have any ideas how I can make this play nicely? Essentially I have a json file with key value pair (UID and SONG) and I am populating a dictionary which then maps the UID of a RFID card to a MP3 file. I'm using a ESP32 wroom dev board and Platformio

########## PANIC ############## Guru Meditation Error: Core 0 panic'ed (Unhandled debug exception). Debug exception reason: Stack canary watchpoint triggered (RFID Task) Core 0 register dump: PC : 0x40084f25 PS : 0x00060c36 A0 : 0x00060c30 A1 : 0x3ffaefb0 A2 : 0x3ffb945c A3 : 0xffffffff A4 : 0x00000000 A5 : 0x00000001 A6 : 0x00060620 A7 : 0x00000001 A8 : 0x8008c88e A9 : 0xffffffff A10 : 0x00000003 A11 : 0x00060c23 A12 : 0x00060c20 A13 : 0x00060623 A14 : 0x007b945c A15 : 0x003fffff SAR : 0x0000001b EXCCAUSE: 0x00000001 EXCVADDR: 0x00000000 LBEG : 0x40084a95 LEND : 0x40084a9d LCOUNT : 0x00000027

Backtrace:0x40084f22:0x3ffaefb00x00060c2d:0x3ffaf0b0 |<-CORRUPTED

ELF file SHA256: 0000000000000000

Rebooting...

############# END PANIC ##############

#include <Dictionary.h>
#include <DictionaryDeclarations.h>

// RFID UID mapping dictionary
Dictionary &d = *(new Dictionary(20));

// RFID Task
void RFIDTask(void *parameters) {
  Serial.println("Starting RFID Task");

  // Loop forever
  while (1) {
    // RFID testing
    if (rfid.PICC_IsNewCardPresent()) { // new tag is available
      if (rfid.PICC_ReadCardSerial()) { // NUID has been readed
        MFRC522::PICC_Type piccType = rfid.PICC_GetType(rfid.uid.sak);
        Serial.print("RFID/NFC Tag Type: ");
        Serial.println(rfid.PICC_GetTypeName(piccType));

        // print UID in Serial Monitor in the hex format
        Serial.print("UID:");
        String rfid_uid = "";
        for (int i = 0; i < rfid.uid.size; i++) {
          Serial.print(rfid.uid.uidByte[i] < 0x10 ? " 0" : " ");
          Serial.print(rfid.uid.uidByte[i], HEX);
          rfid_uid.concat(String(rfid.uid.uidByte[i] < 0x10 ? " 0" : " "));
          rfid_uid.concat(String(rfid.uid.uidByte[i], HEX));
        }
        Serial.println();

        rfid.PICC_HaltA(); // halt PICC
        rfid.PCD_StopCrypto1(); // stop encryption on PCD

        rfid_uid.toUpperCase();

        // Check dictionary for UID value and send MP3 to audio queue
        if (d[rfid_uid.substring(1)] != "") {
          Serial.print("RFID matched the song: ");
          Serial.println(d[rfid_uid.substring(1)]);
          String story = d[rfid_uid.substring(1)];
          String storyPath = "/stories/" + story;
          Serial.println(storyPath);
          next_song(storyPath);
        } else {
          Serial.print("No RFID match found for: ");
          Serial.println(rfid_uid.substring(1));
          Serial.println(d[rfid_uid.substring(1)]);
        }
      }
    }
  }
}

void setup() {

    // Serial setup
    Serial.begin(115200);
	
	// Load RFID UID Dictionary
    File myFile = SD.open("/stories/uid_mapping.json");
    if (myFile) {
      d.jload(myFile);
      // d("04 17 67 A2 4C 68 80", "Goldilocks and the Three Bears.mp3");
      // d("04 17 67 A2 4C 68 81", "Jack and the Beanstalk.mp3");
      Serial.println("RFID Dictionary");
      Serial.println(d["04 5A DC A2 4C 68 81"]);
      myFile.close();
    } else {
      Serial.println("error opening /stories/uid_mapping.json");
    }
	
	// Start RFID Task
	Serial.println("Starting RFID Task...");
    xTaskCreatePinnedToCore(RFIDTask,
                            "RFID Task",
                            1024,
                            NULL,
                            0,
                            NULL,
                            0);
}

jasonrepos avatar Jul 06 '22 21:07 jasonrepos

Increase stack to 2048 or even more

xTaskCreatePinnedToCore(RFIDTask,
                        "RFID Task",
                        2048,
                        NULL,
                        0,
                        NULL,
                        0);

1K is too little. Should help.

From: jasonrepos @.> Sent: Wednesday, July 6, 2022 5:07 PM To: arkhipenko/Dictionary @.> Cc: Subscribed @.***> Subject: [arkhipenko/Dictionary] ESP32 PANIC - Unhandled debug exception (Issue #11)

Im looking for some help, I think its related to my lack of c++ knowledge and pointers. I have the below code (cutdown version of it) and whenever I include the dictionary code inside the RFID task ( ... if (d[rfid_uid.substring(1)] != "") ), the esp32 panic's with the below message. The panic only happens sporadically, after a random number of minutes of playing mp3's, so I think what is happening is my RFID task is trying to access the dictionary which was populated during the setup() function and possibly these memory addresses have now been overwritten? I thought that since I had created the dictionary in the global section, this would not be the case, but this is my lack of knowledge.

Do you have any ideas how I can make this play nicely? Essentially I have a csv file with 2 columns (UID and SONG) and I am populating a dictionary which then maps the UID of a RFID card to a MP3 file. I'm using a ESP32 wroom dev board and Platformio

########## PANIC ############## Guru Meditation Error: Core 0 panic'ed (Unhandled debug exception). Debug exception reason: Stack canary watchpoint triggered (RFID Task) Core 0 register dump: PC : 0x40084f25 PS : 0x00060c36 A0 : 0x00060c30 A1 : 0x3ffaefb0 A2 : 0x3ffb945c A3 : 0xffffffff A4 : 0x00000000 A5 : 0x00000001 A6 : 0x00060620 A7 : 0x00000001 A8 : 0x8008c88e A9 : 0xffffffff A10 : 0x00000003 A11 : 0x00060c23 A12 : 0x00060c20 A13 : 0x00060623 A14 : 0x007b945c A15 : 0x003fffff SAR : 0x0000001b EXCCAUSE: 0x00000001 EXCVADDR: 0x00000000 LBEG : 0x40084a95 LEND : 0x40084a9d LCOUNT : 0x00000027

Backtrace:0x40084f22:0x3ffaefb00x00060c2d:0x3ffaf0b0 |<-CORRUPTED

ELF file SHA256: 0000000000000000

Rebooting...

############# END PANIC ##############

#include <Dictionary.h> #include <DictionaryDeclarations.h>

// RFID UID mapping dictionary Dictionary &d = *(new Dictionary(20));

// RFID Task void RFIDTask(void *parameters) { Serial.println("Starting RFID Task");

// Loop forever while (1) { // RFID testing if (rfid.PICC_IsNewCardPresent()) { // new tag is available if (rfid.PICC_ReadCardSerial()) { // NUID has been readed MFRC522::PICC_Type piccType = rfid.PICC_GetType(rfid.uid.sak); Serial.print("RFID/NFC Tag Type: "); Serial.println(rfid.PICC_GetTypeName(piccType));

    // print UID in Serial Monitor in the hex format
    Serial.print("UID:");
    String rfid_uid = "";
    for (int i = 0; i < rfid.uid.size; i++) {
      Serial.print(rfid.uid.uidByte[i] < 0x10 ? " 0" : " ");
      Serial.print(rfid.uid.uidByte[i], HEX);
      rfid_uid.concat(String(rfid.uid.uidByte[i] < 0x10 ? " 0" : " "));
      rfid_uid.concat(String(rfid.uid.uidByte[i], HEX));
    }
    Serial.println();

    rfid.PICC_HaltA(); // halt PICC
    rfid.PCD_StopCrypto1(); // stop encryption on PCD

    rfid_uid.toUpperCase();

    // Check dictionary for UID value and send MP3 to audio queue
    if (d[rfid_uid.substring(1)] != "") {
      Serial.print("RFID matched the song: ");
      Serial.println(d[rfid_uid.substring(1)]);
      String story = d[rfid_uid.substring(1)];
      String storyPath = "/stories/" + story;
      Serial.println(storyPath);
      next_song(storyPath);
    } else {
      Serial.print("No RFID match found for: ");
      Serial.println(rfid_uid.substring(1));
      Serial.println(d[rfid_uid.substring(1)]);
    }
  }
}

} }

void setup() {

// Serial setup
Serial.begin(115200);

    // Load RFID UID Dictionary
File myFile = SD.open("/stories/uid_mapping.json");
if (myFile) {
  d.jload(myFile);
  // d("04 17 67 A2 4C 68 80", "Goldilocks and the Three Bears.mp3");
  // d("04 17 67 A2 4C 68 81", "Jack and the Beanstalk.mp3");
  Serial.println("RFID Dictionary");
  Serial.println(d["04 5A DC A2 4C 68 81"]);
  myFile.close();
} else {
  Serial.println("error opening /stories/uid_mapping.json");
}

    // Start RFID Task
    Serial.println("Starting RFID Task...");
xTaskCreatePinnedToCore(RFIDTask,
                        "RFID Task",
                        1024,
                        NULL,
                        0,
                        NULL,
                        0);

}

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arkhipenko avatar Jul 06 '22 21:07 arkhipenko

Thank you very much for your quick reply. I can confirm that after increasing the task stack size to 2048, everything has been running smoothly for the last hour and continues to do so. Thank you again!

jasonrepos avatar Jul 07 '22 09:07 jasonrepos