WavePlayback

/*

 This reads a wave file from an SD card and plays it using the I2S interface to

 a MAX08357 I2S Amp Breakout board.

 Circuit:

 * Arduino Zero, MKRZero or MKR1000 board

 * SD breakout or shield connected

 * MAX08357:

   * GND connected GND

   * VIN connected 5V

   * LRC connected to pin 0 (Zero) or pin 3 (MKR1000, MKRZero)

   * BCLK connected to pin 1 (Zero) or pin 2 (MKR1000, MKRZero)

   * DIN connected to pin 9 (Zero) or pin A6 (MKR1000, MKRZero)

 created 15 November 2016

 by Sandeep Mistry

 */

#include <SD.h>
#include <ArduinoSound.h>

// filename of wave file to play

const char filename[] = "MUSIC.WAV";

// variable representing the Wave File

SDWaveFile waveFile;

void setup() {

  // Open serial communications and wait for port to open:

  Serial.begin(9600);

  while (!Serial) {

    ; // wait for serial port to connect. Needed for native USB port only

  }

  // setup the SD card, depending on your shield of breakout board

  // you may need to pass a pin number in begin for SS

  Serial.print("Initializing SD card...");

  if (!SD.begin()) {

    Serial.println("initialization failed!");

    return;

  }

  Serial.println("initialization done.");

  // create a SDWaveFile

  waveFile = SDWaveFile(filename);

  // check if the WaveFile is valid

  if (!waveFile) {

    Serial.println("wave file is invalid!");

    while (1); // do nothing

  }

  // print out some info. about the wave file

  Serial.print("Bits per sample = ");

  Serial.println(waveFile.bitsPerSample());

  long channels = waveFile.channels();

  Serial.print("Channels = ");

  Serial.println(channels);

  long sampleRate = waveFile.sampleRate();

  Serial.print("Sample rate = ");

  Serial.print(sampleRate);

  Serial.println(" Hz");

  long duration = waveFile.duration();

  Serial.print("Duration = ");

  Serial.print(duration);

  Serial.println(" seconds");

  // adjust the playback volume

  AudioOutI2S.volume(5);

  // check if the I2S output can play the wave file

  if (!AudioOutI2S.canPlay(waveFile)) {

    Serial.println("unable to play wave file using I2S!");

    while (1); // do nothing

  }

  // start playback

  Serial.println("starting playback");

  AudioOutI2S.play(waveFile);
}

void loop() {

  // check if playback is still going on

  if (!AudioOutI2S.isPlaying()) {

    // playback has stopped

    Serial.println("playback stopped");

    while (1); // do nothing

  }
}