Open smart mp3 player

Hi there,
I’m new with Arduino.
I want to play a MP3 song by hitting a button, but first I want to get rit of the loop.
The Open Smart serial MP3 player plays my mp3songs over and over again.
Can some one help me with this code?
With windows you have a sscom program to command the player, but with a MacBook they don’t.
I like to hear from you.

//Demo for Serial MP3 Player A module
//by Open-Smart Team and Catalex Team
//catalex_inc@163.com
//Board:  Arduino UNO R3
//IDE:	  Arduino-1.6.4
//Store: http://www.aliexpress.com/store/1199788
//      http://dx.com
//Function:  In the process that the Rotation Angle Sensor is rotated from
//               the 'Min' side to the 'Max' side, the volume is gradually greater.
//               If you touch the Touch Sensor,it will play or pause.

/* Wiring Guide */
//Serial MP3 Player A     |  Arduino UNO R3//
//              RX              |   7
//              TX              |   8
//              VCC            |   5V
//              GND            |   GND
//-------------------------------------



#include <SoftwareSerial.h>

#define ARDUINO_RX 8//should connect to TX of the Serial MP3 Player module
#define ARDUINO_TX 7//connect to RX of the module
SoftwareSerial myMP3(ARDUINO_RX, ARDUINO_TX);

unsigned char playmode = 1; 
  #define PLAY  1
 
  static int8_t Send_buf[6] = {0} ;
/************Command byte**************************/
/*basic commands*/
#define CMD_PLAY  0X01
#define CMD_VOLUME_UP   0X05
#define CMD_VOLUME_DOWN 0X06
#define CMD_FORWARD 0X0A // >>
#define CMD_REWIND  0X0B // <<
#define CMD_STOP 0X0E
#define CMD_STOP_INJECT 0X0F//stop interruptting with a song, just stop the interlude
  
/*5 bytes commands*/
#define CMD_SEL_DEV 0X35
  #define DEV_TF 0X01
#define CMD_IC_MODE 0X35
  #define CMD_SLEEP   0X03
  #define CMD_WAKE_UP 0X02
  #define CMD_RESET   0X05
  
/*6 bytes commands*/	
#define CMD_PLAY_W_INDEX   0X41
#define CMD_PLAY_FILE_NAME 0X42
#define CMD_INJECT_W_INDEX 0X43
  
/*Special commands*/
#define CMD_SET_VOLUME 0X31
#define CMD_PLAY_W_VOL 0X31
  
#define CMD_SET_PLAY_MODE 0X33
  #define ALL_CYCLE 0X00
  #define SINGLE_CYCLE 0X01
  
#define CMD_PLAY_COMBINE 0X45//can play combination up to 15 songs

/*********************************************************************/
/*macro definitions of Rotary angle sensor and LED pin*/
#define ROTARY_ANGLE_SENSOR A0

#define ADC_REF 5//reference voltage of ADC is 5v
#define VCC     5    //the default value of VCC of the control interface is 5v
#define FULL_ANGLE 280//full value of the rotary angle is 280 degrees

#define TOUCH_SENSOR 2

void sendCommand(int8_t command, int16_t dat = 0);

void setup() 
{
	Serial.begin(9600);
	myMP3.begin(9600);
	delay(500);
	pinMode(TOUCH_SENSOR, INPUT_PULLUP);
	attachInterrupt(digitalPinToInterrupt(TOUCH_SENSOR), playOrPause, RISING);
    sendCommand(CMD_SEL_DEV, DEV_TF);  
	delay(200);
	playWithVolume(0X0F01);//play the first song with volume 15(0x0F) class
}
static int8_t pre_vol = 0x0f; 
void loop() 
{
  int degrees;
  degrees = getDegree();
  	
  int8_t volume;
	/*The degrees is 0~280, should be converted to be 0~255 to control the*/
	/*brightness of LED */
  volume = map(degrees, 0, 130, 0, 30); 
  if(volume != pre_vol)
  {
    setVolume(volume);
    pre_vol = volume;
  }
  if(playmode == PLAY) sendCommand(CMD_PLAY);

  delay(50);
}


/********************************************************************************/
/*Function: Get the angle between the mark on the potentiometer cap and the starting position	*/
/*Parameter:-void                                                                                                          */
/*Return:     -int,the range of degrees is 0~280                                                                 */
int getDegree()
{
	int sensor_value = analogRead(ROTARY_ANGLE_SENSOR);
	float voltage;
	voltage = (float)sensor_value*ADC_REF/1023;
	float degrees = (voltage*FULL_ANGLE)/VCC;
	return degrees;
}

/*Interrupt service routine*/
void playOrPause()
{
  playmode = !playmode;
}

void setVolume(int8_t vol)
{
  mp3_5bytes(CMD_SET_VOLUME, vol);
}
void playWithVolume(int16_t dat)
{
  mp3_6bytes(CMD_PLAY_W_VOL, dat);
}

/*cycle play with an index*/
void cyclePlay(int16_t index)
{
  mp3_6bytes(CMD_SET_PLAY_MODE,index);
}

void setCyleMode(int8_t AllSingle)
{
  mp3_5bytes(CMD_SET_PLAY_MODE,AllSingle);
}


void playCombine(int8_t song[][2], int8_t number)
{
  if(number > 15) return;//number of songs combined can not be more than 15
  uint8_t nbytes;//the number of bytes of the command with starting byte and ending byte
  nbytes = 2*number + 4;
  int8_t Send_buf[nbytes];
  Send_buf[0] = 0x7e; //starting byte
  Send_buf[1] = nbytes - 2; //the number of bytes of the command without starting byte and ending byte
  Send_buf[2] = CMD_PLAY_COMBINE; 
  for(uint8_t i=0; i < number; i++)//
  {
    Send_buf[i*2+3] = song[i][0];
	Send_buf[i*2+4] = song[i][1];
  }
  Send_buf[nbytes - 1] = 0xef;
  sendBytes(nbytes);
}


void sendCommand(int8_t command, int16_t dat)
{
  delay(20);
  if((command == CMD_PLAY_W_VOL)||(command == CMD_SET_PLAY_MODE)||(command == CMD_PLAY_COMBINE))
  	return;
  else if(command < 0x10) 
  {
	mp3Basic(command);
  }
  else if(command < 0x40)
  { 
	mp3_5bytes(command, dat);
  }
  else if(command < 0x50)
  { 
	mp3_6bytes(command, dat);
  }
  else return;
 
}

void mp3Basic(int8_t command)
{
  Send_buf[0] = 0x7e; //starting byte
  Send_buf[1] = 0x02; //the number of bytes of the command without starting byte and ending byte
  Send_buf[2] = command; 
  Send_buf[3] = 0xef; //
  sendBytes(4);
}
void mp3_5bytes(int8_t command, uint8_t dat)
{
  Send_buf[0] = 0x7e; //starting byte
  Send_buf[1] = 0x03; //the number of bytes of the command without starting byte and ending byte
  Send_buf[2] = command; 
  Send_buf[3] = dat; //
  Send_buf[4] = 0xef; //
  sendBytes(5);
}
void mp3_6bytes(int8_t command, int16_t dat)
{
  Send_buf[0] = 0x7e; //starting byte
  Send_buf[1] = 0x04; //the number of bytes of the command without starting byte and ending byte
  Send_buf[2] = command; 
  Send_buf[3] = (int8_t)(dat >> 8);//datah
  Send_buf[4] = (int8_t)(dat); //datal
  Send_buf[5] = 0xef; //
  sendBytes(6);
}
void sendBytes(uint8_t nbytes)
{
  for(uint8_t i=0; i < nbytes; i++)//
  {
    myMP3.write(Send_buf[i]) ;
  }
}

but first I want to get rit of the loop.

What does this mean?

What has having a Mac go to do with it?

What I ment was it plays like a loop, the mp3 was playing the same song.

But this is no longer the problem

dominicer:
You can further describe your purpose in this article

Missing something?
Please read the how to use this forum sticky post.