【Espruino】NO.16 使用VS1003播放音乐

/*vs1003引脚定义*/
var pin_MISO = B4;
var pin_MOSI = B5;
var pin_CLK = B3;
var pin_CS = C12;
var pin_DCS = A8;
var pin_RST = C11;
var pin_DREQ = C10;
/* VS1003B(音频解码芯片) 命令 */
/*写操作  | 命令   |   地址   |   数据  |
          |  02H   |   0xH    |  xxxxH  | */
var VS_WRITE_COMMAND = 0x02;

/*读操作  | 命令   |   地址   |   数据  |
          |  03H   |   0xH    |  xxxxH  | */
var VS_READ_COMMAND =	0x03;


var SPI_MODE				=0x00;  //模式控制
var SPI_STATUS			=0x01;  //VS10XX的状态寄存器
var SPI_BASS				=0x02;  //高低音控制
var SPI_CLOCKF  		=0x03;  //时钟频率倍乘寄存器
var SPI_DECODE_TIME =0x04;  //解码时间长度
var SPI_AUDATA     	=0x05;  //各种音频数据
var SPI_WRAM      	=0x06;  //RAM 写/读
var SPI_WRAMADDR  	=0x07;  //RAM 写/读的起始地址
var SPI_HDAT0     	=0x08;  //流数据标头0
var SPI_HDAT1     	=0x09;  //流数据标头1
var SPI_AIADDR    	=0x0a;  //应用程序的起始地址
var SPI_VOL      		=0x0b;  //音量控制
var SPI_AICTRL0  		=0x0c;  //应用程序控制寄存器0
var SPI_AICTRL1  		=0x0d;  //应用程序控制寄存器1
var SPI_AICTRL2  		=0x0e;  //应用程序控制寄存器2
var SPI_AICTRL3  		=0x0f;  //应用程序控制寄存器3



function delay(x) //delay x ms
{
	var time0 = getTime();
	var time1 = 0;
	while(1)
	{
		time1 = getTime();
		if((time1-time0)*1000>=x)
			break;
	}
}
function VS10XX_Init(){
  SPI1.setup({ sck:pin_CLK, mosi:pin_MOSI, miso: pin_MISO,order: "msb", baud: 1000000 ,mode:0});
	//reset vs1003
	digitalWrite(pin_RST,HIGH);
	delay(100);
	digitalWrite(pin_RST,LOW);
	delay(100);
	digitalWrite(pin_RST,HIGH);

	digitalWrite(pin_CS,HIGH);
	digitalWrite(pin_DCS,HIGH);
	while(!digitalRead(pin_DREQ));
	
	SPI1.send(0xff,pin_CS);//启动传输
	
	var VS10XX_ID=VS10XX_ReadReg(SPI_STATUS);//读取状态寄存器
	VS10XX_ID>>=4;//得到VS10XX的芯片信号 

  if(VS10XX_ID==VS1053)
  {
		VS10XX_WriteReg(SPI_MODE,0x0816);//软件复位,新模式
	}
  else
  {
		VS10XX_WriteReg(SPI_MODE,0x0804);//软件复位,新模式
  }
	while(!digitalRead(pin_DREQ));

  VS10XX_WriteReg(SPI_CLOCKF,0x9800);//设置VS10XX的时钟,3.5倍频 ,2xADD
  VS10XX_WriteReg(SPI_AUDATA,0xbb81);// 采样率48k，立体声
  VS10XX_WriteReg(SPI_BASS,0x00f6);// 设置重低音，0x00F6对60HZ以下的音频信号进行15dB的增强，0x7A00对10KHZ以上的信号进行10.5dB的增强
  VS10XX_WriteReg(SPI_VOL,0x4040);// VS10XX 音量

	while(!digitalRead(pin_DREQ));
	SPI1.setup({ sck:pin_CLK, mosi:pin_MOSI, miso: pin_MISO,order: "msb", baud: 16000000 ,mode:0});

}

function VS10XX_WriteReg( addr, data){
        digitalWrite(pin_DCS,HIGH);//关闭数据片选
        digitalWrite(pin_CS,LOW);//打开片选，可对功能寄存器读写 

        SPI1.send(VS_WRITE_COMMAND);//写入操作码0x02
        SPI1.send(addr);//写入寄存器地址
        SPI1.send(data>>8);//写入高字节
        SPI1.send(data&0xff);//写入低字节

        digitalWrite(pin_CS,HIGH);
}

function VS10XX_ReadReg( addr)
{
        var temp = 0;
        digitalWrite(pin_DCS,HIGH);//关闭数据片选
        digitalWrite(pin_CS,LOW);//打开片选，可对功能寄存器读写 

        SPI1.send(VS_READ_COMMAND);//写入操作码0x02
        SPI1.send(addr);//写入寄存器地址
        temp = (SPI1.send(0xa5)<<8);//读取高字节
        temp |= SPI1.send(0xa5);//读取低字节

        digitalWrite(pin_CS,HIGH);
        return temp;
}

/******************************************************************
向VS1003写入2048个0，用于清空VS1003的数据缓冲区注：在播放完一个完整
的音频（如一首完整的MP3）后，调用此函数，清空VS1003数据缓冲区，为下
面的音频数据（如下一首MP3）作准备。
 ******************************************************************/
function VS_Flush_Buffer()
{
        var i = 0;
        var j = 0;
        digitalWrite(pin_DCS,LOW); //打开数据片选
        while(i<2048)
        {
               if ( digitalRead(pin_DREQ) !== 0 )
                {
                        for ( j=0; j<32; j++ )
                        {
                                SPI1.send( 0 );
                                i++;
                        }
                }
        }
        digitalWrite(pin_DCS,HIGH);
}

var file=["0:/1.mp3","0:/2.mp3","0:/3.mp3","0:/32.mp3"];

var button=0;//控制歌曲的结束
//播放名为filename的文件
function play(filename){

  var fd = E.openFile(filename,'r') ; 
	var i=0,j=0;
  var data="",xx="";
	digitalWrite(pin_DCS,LOW);
	while(1)
	{
      data=fd.read(512);
      
      for(j=0;j<16;j++)
      {
          xx=data.slice(j*32,(1+j)*32);
          digitalWrite([LED1,LED2,LED3],xx[0]);
          while(digitalRead(pin_DREQ) !== 1);
          SPI1.send(xx);
          if(xx.length<32)
            return;
	        if(digitalRead(BTN1)==1)
	        {
	          button=0;
	          digitalWrite(pin_DCS,HIGH); 
	          VS_Flush_Buffer();
	          fd.close();
	          return;
	        }

      }
	}
	digitalWrite(pin_DCS,HIGH); 
	VS_Flush_Buffer();
	fd.close();
}
//播放卡里的音乐
function xxplay()
{
	var cnt=0;
	while(1)
	{
	  for(cnt=0;cnt<4;cnt++)
	  {
	    play(file[cnt]);
	  }
	}
}

VS10XX_Init();
  
//加入10ms去抖，按下按键BTN2开始播放
var l=0;
function start() {
  l = !l;
  digitalWrite(LED1,l);
  xxplay();
}

setWatch(start,C5,{repeat:true,edge:'rising',debounce:10});
save();