#include <SPI.h>
#include <SD.h>
#include <Audio.h>

int yellowLED = 21;
int pb = 14;
int pbval;
int pb2 = 13;
int pbval2;
int pb3 = 12;
int pbval3;

Sd2Card card;
SdVolume volume;
SdFile root;

const int chipSelect = 10;    

File myFile;

void setup()
{

 ///////////////////////////////////////////////////////////////////////////////////////////
 //////////////////////////////////////////DECLARATIONS/////////////////////////////////////
 
  pinMode(yellowLED, OUTPUT);
  pinMode(pb, INPUT_PULLUP);  
  pinMode(pb2, INPUT_PULLUP);
  pinMode(pb3, INPUT_PULLUP);
  
 ///////////////////////////////////////////////////////////////////////////////////////////
 ///////////////////////////////////////SD INITIALIZATION///////////////////////////////////
  Serial.begin(9600);
  Serial.print("\nInitializing SD card...");
  pinMode(10, OUTPUT);
  
  if (!card.init(SPI_HALF_SPEED, chipSelect)) 
  {
    Serial.println("Initialization failed.");
    return;
  } else {
    Serial.println("Initialization successful."); 
         }
 ///////////////////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////SD INFO///////////////////////////////////////////


 if (!volume.init(card)) 
  {
  }

  uint32_t volumesize;
  volumesize = volume.blocksPerCluster();    // clusters are collections of blocks
  volumesize *= volume.clusterCount();       // we'll have a lot of clusters
  volumesize *= 512;        // SD card blocks are always 512 bytes
  
  Serial.print("Volume size (Mbytes): ");
  volumesize /= 1048576;
  Serial.println(volumesize);
  
  Serial.println("\nFiles found on the card: ");
  root.openRoot(volume);
  root.ls();
 ///////////////////////////////////////////////////////////////////////////////////////////
 ////////////////////////////////////////AUDIO SETUP////////////////////////////////////////

  SPI.setClockDivider(2);

  Audio.begin(88200, 100);


 ///////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////MAIN SETUP/////////////////////////////////////////

  if (!SD.begin(10)) 
  {
  }


}
////////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////MAIN LOOP///////////////////////////////////////////


void loop()
{
  pbval = digitalRead(pb);
  pbval2 = digitalRead(pb2);
  pbval3 = digitalRead(pb3);
  
  /////// test ///////
      if (pbval == 0)                                      // 0 = press
      {
          int count=0;
        
          File myFile = SD.open("test.wav");
          if (!myFile)                                     // error msg if myFile variable doesn't get set
            {
              Serial.println("error opening test.wav");
            }
        
          const int S=1024;                               // Number of samples to read in block
          short buffer[S];
        
          Serial.print("Playing");                        // Plays until file finished
          while (myFile.available()) 
            {
                myFile.read(buffer, sizeof(buffer));      // read from file into buffer
            
                int volume = 1024;                        
                Audio.prepare(buffer, S, volume);         // prepare samples from file to audio buffer, set volume
                Audio.write(buffer, S);                   // write audio out DAC0
            
                count++;
                if (count == 100) 
                {
                  Serial.print(".");
                  count = 0;
                }
            }
            
          myFile.close();
        
          Serial.println("End of file. Thank you for listening!");
      } 
  
////// flam1 //////  
      if (pbval2 == 0)                                      // 0 = press
      {
          int count=0;
        
          File myFile = SD.open("flam1.wav");
          if (!myFile)                                     // error msg if myFile variable doesn't get set
            {
              Serial.println("error opening bass.wav");
            }
        
          const int S=1024;                               // Number of samples to read in block
          short buffer[S];
        
          Serial.print("Playing");                        // Plays until file finished
          while (myFile.available()) 
            {
                myFile.read(buffer, sizeof(buffer));      // read from file into buffer
            
                int volume = 1024;                        
                Audio.prepare(buffer, S, volume);         // prepare samples
                Audio.write(buffer, S);                   // write audio out DAC
            
                count++;
                if (count == 100) 
                {
                  Serial.print(".");
                  count = 0;
                }
            }
            
          myFile.close();
        
          Serial.println("End of file. Thank you for listening!");
      }      
}
////////////////////////////////////////////////////////////////////////////////////////////