DIYzakka风格MP3播放器单片机源码

#include <STC12C5A60S2.H> //单片机头文件 sbit led = P0^0; sbit code0 =P0^1; sbit code1 =P0^2; sbit code2 =P0^3; //VS1003IO sbit XRESET =P0^7; sbit DREQ =P0^4; sbit XCS =P0^6; sbit XDCS =P0^5; //SD卡IO sbit CLK = P3^4;//同步时钟 sbit DI = P3^5;//Cmd/DataIn sbit DO = P3^6;//DataOut sbit CS = P3^7;//片选 void delay_ms(int i){ int a,b; for(a=0;a<i;a++){ for(b=0;b<600;b++); }; } //******************vs1003操作************************************************************************************************* //初始化spi void init_spi(void){ SPCTL = 0xdd;//忽略SS，设置主机,spi高位先发送 SPSTAT = 0xc0;//清除状态寄存器 SPDAT = 0;//初始化数据寄存器 } void spi_write(unsigned char sendData){ SPDAT = sendData; while((SPSTAT&0x80)==0); SPSTAT = 0xc0;//清除状态寄存器 SPSTAT = 0; } void delay(unsigned int time) { while(time--); } void wr_command(unsigned char addr,unsigned char hdat,unsigned char ldat ) { DREQ=1; while(!DREQ); XCS=0; spi_write(0x02); spi_write(addr); spi_write(hdat); spi_write(ldat); XCS=1; } //vs1003初始化 void Mp3Reset(void) { XRESET=0; delay(100); XDCS=XCS=XRESET=1; wr_command(0x00,0x08,0x04); delay(10); DREQ=1; while(!DREQ); wr_command(0x03,0x98,0x00); delay(10); wr_command(0x05,0xbb,0x81); delay(10); wr_command(0x02,0x00,0x55); delay(10); wr_command(0x0b,0x2e,0x2e); // 音量 delay(10); spi_write(0); spi_write(0); spi_write(0); spi_write(0); } //向VS1003写入一个字节的音频数据，写之前要打开XDCS片选，XDCS=0 void send_dat(unsigned char dat) { DREQ=1; while(!DREQ);//VS1003的DREQ为高才能写入数据 spi_write(dat);//通过SPI向VS1003写入一个字节的音频数据 } //************************SD卡操作********************************************************************************8 //***********模拟spi写函数 void SPI_W(unsigned char Data){ unsigned char i; for(i = 0; i<8; i++){ Data <<= 1; CLK = 0; DI = CY; CLK = 1; }; DI = 1; } //***********spi读函数 unsigned char SPI_R(){ unsigned char Data,i; DO = 1;//设置DO接口为输入状态 for(i = 0; i<8; i++){ Data <<= 1; CLK = 0; CLK = 1; Data |= DO; }; return Data; } //**************读sd卡回应 unsigned char SD_Response(){ unsigned char i,Response; for(i = 0; i<10; i++){ Response = SPI_R(); if(Response == 0x00) break; if(Response == 0x01) break; }; return Response; } //***************向SD发命令 void SD_Cmd(unsigned char Cmd, unsigned long Argument, unsigned char CRC){ unsigned char arg[4]; arg[0] = (unsigned char)Argument; arg[1] = (unsigned char)(Argument >> 8); arg[2] = (unsigned char)(Argument >> 16); arg[3] = (unsigned char)(Argument >> 24); SPI_W(Cmd | 0x40); SPI_W(arg[3]); SPI_W(arg[2]); SPI_W(arg[1]); SPI_W(arg[0]); SPI_W(CRC); } //*************SD卡初始化 unsigned char SD_Init(){ unsigned int delay = 0; unsigned char i; unsigned char Response = 0xff; CS = 1; for(i = 0; i<10; i++){ SPI_W(0xff);//上电后给74个以上的时间脉冲 }; CS = 0; SD_Cmd(0x00, 0, 0x95);//命令CMD0,复位SD卡 //等待复位成功 i = 0; while(SD_Response() != 0x01){//等待SD卡回应信号 i++; if(i > 100){ return 0;//失败返回0 }; }; CS = 1; SPI_W(0xff);//关片选后写8个空脉冲，SD卡复位完毕 //设置SPI i = 0; CS = 0; while(Response != 0x00){//循环等待成功回应，若成功，回应信号为0x00 SD_Cmd(0x01, 0, 0xff);//CMD1,将SD卡设置为SPI模式，无需CRC校验，填入0xff Response = SD_Response(); if(i > 100){ return 0;//尝试100次,失败返回0 }; }; CS = 1; SPI_W(0xff);//给8个空脉冲 return 1; } //****************从sd卡读数据块 void SD_Block_R(unsigned char* block, unsigned long address){ unsigned int i; CS = 0; SD_Cmd(0x11, address, 0xff);//CMD11,数据块读写命令， while(SD_Response()!=0x00);//循环等待命令回应0x00 while(SPI_R() != 0xfe); //0xfe为块读出的头， 后面紧跟512字节的数据块+2字节的CRC for(i=0; i<512 ; i++){ block[i] = SPI_R();//读数据 }; SPI_R(); SPI_R();//两个字节的CRC。舍弃 CS =1; SPI_R();//8个空脉冲 } //************************串口操作********************************************************************************8 void main(){ unsigned char xdata block[512]; int i; unsigned long adr = 0x3b000; unsigned long len = 0; unsigned char mp3Name = 0x30; led=0; delay_ms(5000); led=1; //等待2秒使相片稳定 delay_ms(5000); if(code0==0){mp3Name=mp3Name+1;}; if(code1==0){mp3Name=mp3Name+2;}; if(code2==0){mp3Name=mp3Name+4;}; //如果扫到的编码大于0（防止误操作） if(mp3Name>0x30){ //初始化spi init_spi(); //初始化sd卡 SD_Init(); //初始化vs1003 Mp3Reset(); delay_ms(1000); led=0; SD_Block_R(block,adr); //在SD卡的FAT中找到该MP3 for(i=0;i<512;i=i+16){ if(block[i]==0x28){ if(block[i+1]==mp3Name){ if(block[i+2]==0x29){ break; }; }; }; }; //如果找到该MP3文件 if(i<500){ //计算MP3文件的地址和长度 adr=block[i+26]+block[i+27]*256; adr=adr*64+376; adr=adr*512; len = block[i+28] + block[i+29]*256 + block[i+30]*65536 + block[i+31]*16777216; len=len/512+1; //循环播放 XDCS=0; while(1){ unsigned long address = adr; unsigned long ii; for(ii=0;ii<len;ii++){ SD_Block_R(block,address+=512); for(i=0;i<512;i++){ send_dat(block[i]); }; }; delay_ms(20000); }; }; }; //如果没有相片的解码小于0或SD卡中没找到该MP3文件，灯闪烁 while(1){ led=~led; delay_ms(8000); }; }