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#include <EEPROM.h>
#include <FatReader.h>
#include <SdReader.h>
#include <avr/pgmspace.h>
#include <avr/sleep.h>
#include "WaveUtil.h"
#include "WaveHC.h"

int songNumber;  // the song to play
int numSongs;    // the number of songs
SdReader card;   // info for the card
FatVolume vol;   // info for the partition
FatReader root;  // info for the filesystem
WaveHC wave;     // wave Object
dir_t dirBuf;    // buffer for directory reads

/*
* numFiles determines how many files there are on the SD Card
*/
void numFiles() {
  numSongs = 0;
  int8_t r;
  while ((r = root.readDir(dirBuf)) > 0) {
    //skip subdirs . and ..
    if (dirBuf.name[0] == '.')
      continue;
  }
}

/*
* songToPlay figures out what song to play this time, and sets the song to play next time
*/
void songToPlay() {
  songNumber = EEPROM.read(0);  // read the song number to play
  // assign the song to play next startup
  if (songNumber < numSongs) {
    EEPROM.write(0, songNumber + 1);
  }
  else { // if songNumber >= numSongs
    EEPROM.write(0, 1);
  }
}

/*
* playSong finds the right song to play, and starts to play it
*/
void playSong() {
  // find the song to play by iterating through the files on the
  // SD Card until you get to the right one.
  for (int i = 0; i <= songNumber; i++) {

  }
}

/*
* sleep puts the ardunio into power down mode
*/
void sleep() {
  set_sleep_mode(SLEEP_MODE_PWR_DOWN);
  sleep_enable();
}

void setup() {
  numFiles();
  songToPlay();
  playSong();
  // while the song is playing, wait
  while (wave.isplaying) {
    // wait 1 second, and check again.
    delay(1000);
  }
  // once it is done playing, shut it down.
  sleep();
}

void loop() {
}


To use this library place the uncompressed WaveHC folder into the
libraries subfolder in your main sketches folder. You may need to
create the libraries folder. Restart the Arduino IDE if it was open.