ESP32 Forum

Code: Select all

Starting setup...
SD Card initialized.
I2S output initialized.
Root directory opened.
No WAV files found.
Guru Meditation Error: Core  1 panic'ed (LoadProhibited). Exception was unhandled.

Core  1 register dump:
PC      : 0x400d1be4  PS      : 0x00060630  A0      : 0x800d63ec  A1      : 0x3ffb2270  
A2      : 0x3ffc2640  A3      : 0x3ffc2620  A4      : 0x00000000  A5      : 0x3ffc2664  
A6      : 0x3ffb8188  A7      : 0x80000001  A8      : 0x800d1da0  A9      : 0x3ffb2210  
A10     : 0x00000000  A11     : 0x00000013  A12     : 0x3f404e11  A13     : 0x3f40a4bf  
A14     : 0x3f40a4bf  A15     : 0x3ffc2620  SAR     : 0x00000019  EXCCAUSE: 0x0000001c  
EXCVADDR: 0x00000000  LBEG    : 0x40084551  LEND    : 0x40084559  LCOUNT  : 0x00000027  


Backtrace: 0x400d1be1:0x3ffb2270 0x400d63e9:0x3ffb2290




ELF file SHA256: dd159258c1c8dc84

Rebooting...

Code: Select all

#include <Arduino.h>
#include <AudioFileSourceSD.h>
#include <AudioGeneratorWAV.h>
#include <AudioOutputI2S.h>
#include <SD.h> // Include the SD library

// Pin definitions for the I2S DAC
#define I2S_BCLK_PIN  26  // Bit clock pin for I2S
#define I2S_LRC_PIN   25  // Left/right channel clock pin for I2S
#define I2S_DOUT_PIN  22  // Data out pin for I2S

// Pin definitions for the SD card module
#define SD_CS_PIN     2   // Chip select (CS) pin
#define SD_MOSI_PIN   23  // MOSI pin for SPI communication
#define SD_MISO_PIN   19  // MISO pin for SPI communication
#define SD_SCK_PIN    18  // Clock pin for SPI communication

AudioGeneratorWAV *wav;
AudioOutputI2S *out;
AudioFileSourceSD *file;
File root;

bool openNextWavFile() {
  File entry = root.openNextFile();
  while (entry) {
    // Check if the file is a WAV file based on the extension
    if (entry.name() && strstr(entry.name(), ".WAV")) {
      const char *filePath = entry.name();
      Serial.print("Playing WAV file: ");
      Serial.println(filePath);

      // Open the WAV file
      file = new AudioFileSourceSD();
      if (file->open(filePath)) {
        wav = new AudioGeneratorWAV();
        if (wav->begin(file, out)) {
          // Successfully opened the WAV file
          Serial.println("WAV file playback started.");
          return true;
        } else {
          Serial.println("Could not start WAV file playback");
          delete wav;
          delete file;
        }
      } else {
        Serial.println("Could not open WAV file");
        delete file;
      }
    }

    entry = root.openNextFile();
  }

  // No more WAV files found
  return false;
}

void setup() {
  Serial.begin(115200);
  Serial.println("Starting setup...");

  // Set the pin modes manually
  pinMode(SD_CS_PIN, OUTPUT);
  pinMode(SD_MOSI_PIN, OUTPUT);
  pinMode(SD_MISO_PIN, INPUT);
  pinMode(SD_SCK_PIN, OUTPUT);

  // Initialize the SD library
  if (!SD.begin(SD_CS_PIN)) {
    Serial.println("SD Card initialization failed");
    while (1); // Halt program execution if SD initialization fails
  }
  Serial.println("SD Card initialized.");

  // Initialize the I2S output
  out = new AudioOutputI2S();
  out->SetOutputModeMono(true); // Set to true for mono audio
  Serial.println("I2S output initialized.");

  // Open the root directory of the SD card
  root = SD.open("/");
  if (!root) {
    Serial.println("Could not open root directory");
    while (1); // Halt program execution if root directory cannot be opened
  }
  Serial.println("Root directory opened.");

  // Try to open the first WAV file
  if (openNextWavFile()) {
    Serial.println("Playing WAV file...");
  } else {
    Serial.println("No WAV files found.");
    root.close();
  }
}

void loop() {
  // Check if the WAV file is still playing
  if (wav->isRunning()) {
    if (!wav->loop()) {
      // If the file has finished playing, close it and try the next one
      wav->stop();
      delete wav;
      delete out;
      delete file;
      Serial.println("WAV file playback finished.");
      
      // Try to open the next WAV file
      if (!openNextWavFile()) {
        Serial.println("No more WAV files found.");
        root.close();
      }
    }
  }
}

Code: Select all

AudioGeneratorWAV *wav = nullptr;
AudioOutputI2S *out = nullptr;
AudioFileSourceSD *file = nullptr;

Code: Select all

if (wav) {
  // do something
  delete wav;
  wav = nullptr; //Assign it to null for further use
}

Code: Select all

void loop() {
  // Check if the WAV file is still playing
  if (wav->isRunning()) {
  }
  ...
}

Code: Select all

wav = new AudioGeneratorWAV();