gistfile1.txt

#include <SoftwareSerial.h>
#define ARDUINO_RX 5//should connect to TX of the Serial MP3 Player module
#define ARDUINO_TX 6//connect to RX of the module
SoftwareSerial mySerial(ARDUINO_RX, ARDUINO_TX);
static int8_t Send_buf[8] = {0} ;
const int buttonPin = 2;
int buttonState = 0;
int buttonStateOld = 0;
#define CMD_SEL_DEV 0X09
#define DEV_TF 0X02
#define CMD_PLAY_W_VOL 0X22
#define CMD_PLAY 0X0D
#define CMD_PAUSE 0X0E
#define CMD_PREVIOUS 0X02
#define CMD_NEXT 0X01

int16_t songs[] = {0X1E02, 0X1E03, 0X1E04, 0X1E06};

void sendCommand(int8_t command, int16_t dat) {
  delay(20);
  Send_buf[0] = 0x7e; //starting byte
  Send_buf[1] = 0xff; //version
  Send_buf[2] = 0x06; //the number of bytes of the command without starting byte and ending byte
  Send_buf[3] = command; //
  Send_buf[4] = 0x00;//0x00 = no feedback, 0x01 = feedback
  Send_buf[5] = (int8_t)(dat >> 8);//datah
  Send_buf[6] = (int8_t)(dat); //datal
  Send_buf[7] = 0xef; //ending byte
  for(uint8_t i=0; i<8; i++)//
  {
    mySerial.write(Send_buf[i]) ;
  }
}

void playSong(int songId) {
  Serial.print("Playing: ");
  Serial.println(songId);
  uint16_t song = songs[songId];
  sendCommand(CMD_PLAY_W_VOL, song);
}

void stopPlaying() {
  sendCommand(CMD_PAUSE, 0X0E);
}

void setup() {
  mySerial.begin(9600);
  pinMode(buttonPin, INPUT_PULLUP);
  Serial.begin(9600);
  delay(500);//Wait chip initialization is complete
  sendCommand(CMD_SEL_DEV, DEV_TF);//select the TF card  
  delay(200);//wait for 200ms
  sendCommand(CMD_PLAY_W_VOL, 0X1E01);//play the first song with volume 30 class
  delay(500);
}

void loop() {
  for (int i=0; i<10; i++) {
    playSong(i);
    delay(5000);
  }
}