ICCAVR：基于M64的VS1003测试程序

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#include <iom64v.h>
#include <macros.h>
#include "vs1003B.h"
#define uchar unsigned char
#define uint unsigned int
#define MP3_DDR        DDRB
#define MP3_PORT       PORTB
#define MP3_PIN        PINB
#define MP3_CMD_CS     BIT(4)
#define MP3_DATA_REST  BIT(5)
#define MP3_DATA_REQ   BIT(6)  
#define MP3_DATA_CS    BIT(7)

//SPI initialize
void spi_init(void)
{
DDRB = 0xBF;    //SI输入，SO，SCK，SS输出
SPCR = 0x50;  //setup SPI
SPSR = 0x01;  //setup SPI
}
void Write_Byte_SPI(unsigned char byte)
{   
    SPDR = byte;
    while (!(SPSR & (1<<SPIF)));
}
unsigned char Read_Byte_SPI(void)
{   
    SPDR = 0xFF;
    while (!(SPSR &(1<<SPIF)));
    return SPDR;
}
void mp3_port_init()
{
spi_init();
MP3_DDR|=MP3_DATA_CS |MP3_CMD_CS|MP3_DATA_REST;
MP3_DDR&=~MP3_DATA_REQ;
MP3_PORT|=MP3_DATA_CS |MP3_CMD_CS|MP3_DATA_REST;
DDRC=0XFFORTC=0XFF;
}
void vs1003_cmd_write(uchar address,uint data)
{
MP3_PORT|=MP3_DATA_CS;      
MP3_PORT&=~MP3_CMD_CS;
      
Write_Byte_SPI(0x02);      //VS1003的写命令
Write_Byte_SPI(address);   //地址
Write_Byte_SPI(data>>8);
Write_Byte_SPI(data);

MP3_PORT|=MP3_CMD_CS;     
}

void vs1003_data_write(uchar data)
{
MP3_PORT&=~MP3_DATA_CS;         
Write_Byte_SPI(data);
MP3_PORT|=MP3_DATA_CS;         
MP3_PORT|=MP3_CMD_CS;        
}

uint vs1003_read(uchar address)
{
uchar temp1=0;
uint temp=0;
MP3_PORT|=MP3_DATA_CS;      
MP3_PORT&=~MP3_CMD_CS;
      
Write_Byte_SPI(0x03);      //VS1003的读命令
Write_Byte_SPI(address);   //地址
temp=Read_Byte_SPI();
temp=temp<<8;
temp1=Read_Byte_SPI();
temp=temp|temp1;

MP3_PORT|=MP3_CMD_CS;      
return temp;

}

void vs1003_init(void)
{
vs1003_cmd_write(0x00,0x0800);     //NEW MODE
vs1003_cmd_write(0x02,0X75);       //BASS
vs1003_cmd_write(0x03,0X4000);     //2倍频
vs1003_cmd_write(0x0b,0X2020);     //VOLUME
}

void test_1003()
  {
   unsigned int data_pointer;unsigned char i;
   while ( 1)
    {
        data_pointer=0;
    while(data_pointer<4800)
        {
      if(MP3_PIN &MP3_DATA_REQ)
            {
        for(i=0;i<32;i++)
               {
         vs1003_data_write(vsBeepMP3[data_pointer]);
         data_pointer++;
                }
                if(data_pointer==4799) break;   //如果现在的数据不够了，则跳出来
            }
        }
         }
   }   

void main()
{
mp3_port_init();
vs1003_init();vs1003_init();

while(1)
{
test_1003();
}
}

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VS1003头文件：