아두이노 Serial MP3 모듈 -#2

이전에 했던것이 그냥 001로 시작하는 mp3파일을 플레이 시키는것 이외에는 아무것도 없다.

여기서 부터 이제 공부를 해야 한다.

버턴을 달아서 mp3를 play하는 예제는 많으니 아두이노 시리얼 모니터 창을 이용해서 할 것이다.

일단 명령어는 처음곡 플레이, 이전곡, 다음곡 3개만 넣도록 하자.

나머지 볼률 업다운, 램덤 재생정도는 스스로 할 수 있을것 같다.

 

//code rearranged by Javier Muñoz 10/11/2016 ask me at javimusama@hotmail.com
#include <SoftwareSerial.h>
 
#define ARDUINO_RX 2//should connect to TX of the Serial MP3 Player module
#define ARDUINO_TX 3//connect to RX of the module
SoftwareSerial mySerial(ARDUINO_RX, ARDUINO_TX);//init the serial protocol, tell to myserial wich pins are TX and RX
 
////////////////////////////////////////////////////////////////////////////////////
//all the commands needed in the datasheet(http://geekmatic.in.ua/pdf/Catalex_MP3_board.pdf)
static int8_t Send_buf[8] = {0} ;//The MP3 player undestands orders in a 8 int string
                                 //0X7E FF 06 command 00 00 00 EF;(if command =01 next song order) 
#define NEXT_SONG 0X01 
#define PREV_SONG 0X02 
 
#define CMD_PLAY_W_INDEX 0X03 //DATA IS REQUIRED (number of song)
 
#define VOLUME_UP_ONE 0X04
#define VOLUME_DOWN_ONE 0X05
#define CMD_SET_VOLUME 0X06//DATA IS REQUIRED (number of volume from 0 up to 30(0x1E))
#define SET_DAC 0X17
#define CMD_PLAY_WITHVOLUME 0X22 //data is needed  0x7E 06 22 00 xx yy EF;(xx volume)(yy number of song)
 
#define CMD_SEL_DEV 0X09 //SELECT STORAGE DEVICE, DATA IS REQUIRED
#define DEV_TF 0X02 //HELLO,IM THE DATA REQUIRED
                
#define SLEEP_MODE_START 0X0A
#define SLEEP_MODE_WAKEUP 0X0B
 
#define CMD_RESET 0X0C//CHIP RESET
#define CMD_PLAY 0X0D //RESUME PLAYBACK
#define CMD_PAUSE 0X0E //PLAYBACK IS PAUSED
 
#define CMD_PLAY_WITHFOLDER 0X0F//DATA IS NEEDED, 0x7E 06 0F 00 01 02 EF;(play the song with the directory \01\002xxxxxx.mp3
 
#define STOP_PLAY 0X16
 
#define PLAY_FOLDER 0X17// data is needed 0x7E 06 17 00 01 XX EF;(play the 01 folder)(value xx we dont care)
 
#define SET_CYCLEPLAY 0X19//data is needed 00 start; 01 close
 
#define SET_DAC 0X17//data is needed 00 start DAC OUTPUT;01 DAC no output
////////////////////////////////////////////////////////////////////////////////////
 
 
void setup()
{
  Serial.begin(115200);//Start our Serial coms for serial monitor in our pc
  mySerial.begin(9600);//Start our Serial coms for THE MP3
  
  delay(500);//Wait chip initialization is complete
  sendCommand(CMD_SEL_DEV, DEV_TF);//select the TF card  
  delay(200);//wait for 200ms
 
}
void loop()
{
    int menuType;
    char message[25];
    
    display_menu();
    serial_command(message);
    menuType = atoi(message);//문자열을 숫자로 
    
    if(!strcmp(message,"\r\n")) return ;//엔터만 입력할 경우 재입력 
    else 
    {
      Serial.print(menuType); 
      Serial.print(" 선택하였습니다\r\n");
    }
       
    if(menuType > 0 && menuType < 4) 
    {  
      if(menuType ==1) 
      {
          sendCommand(CMD_PLAY_WITHVOLUME, 0X0F02);//play the first song with volume 15 class
      }
      else if(menuType ==2) 
      {
          sendCommand(NEXT_SONG, 0X0000);//play the first song with volume 15 class
      } 
       else if(menuType ==3) 
      {
          sendCommand(PREV_SONG, 0X0000);//play the first song with volume 15 class
      }             
    }
    return ;      
}
 
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]) ;//send bit to serial mp3
       //Serial.print(Send_buf[i],HEX);//send bit to serial monitor in pc
    }
    Serial.println();
}
 
void serial_command(char* buf)
{
    int tempPos = 0;
    while( 1)
    {
        while(Serial.available())
        {
            char c = Serial.read(); 
            if (tempPos < 1000) { buf[tempPos] = c; tempPos++;   }
        }
        buf[tempPos] = 0;
 
        if (tempPos > 0 && buf[tempPos-2]=='\r'  && buf[tempPos-1]=='\n') break;
    }  
    return ; 
}
 
 
void display_menu()
{
    Serial.print("==========MP3 PLAY 프로그램==========\n\n");   
    Serial.print("     SERIAL MP3 module     \n"); 
    Serial.print("********************\n"); 
    Serial.print("*      1.play     *\n"); 
    Serial.print("*      2.NEXT_SONG      *\n"); 
    Serial.print("*      3.PREV_SONG  *\n"); 
 
    Serial.print("********************\n"); 
    Serial.print("메뉴을 선택하세요 : "); 
}