vs1001._c

使用硬盘制作mp3的源程序

#include <iom128v.h>
#include <macros.h>
#include "vs1001.h"
#include "generic.h"
#include "remote.h"

//*************************************
// unsigned char byte void WriteByteSPI(unsigned char byte)
//*************************************
unsigned char WriteByteSPI(unsigned char byte)
{
SPDR = byte;
while(!(SPSR & (1<<SPIF))); // Wait Queue off
return SPDR;
}

//*************************************
// void VS1001_Read(unsigned char Address,int Count,unsigned int *pData)
//*************************************
void VS1001_Read(unsigned char Address,int Count,unsigned int *pData)
{
PORT_MP3_OUT &= ~XCS;	  	   // XCS Low
WriteByteSPI(VS1001_READ);
WriteByteSPI(Address);
while(Count--)
			  {
			  *pData = WriteByteSPI(0) << 8;
			  *pData++ |= WriteByteSPI(0);
			  }
PORT_MP3_OUT |= XCS;	  	   // XCS High
delay_us(5);
}

//*************************************
// void VS1001_Write(unsigned char Address,int Count,unsigned int *pData)
//*************************************
void VS1001_Write(unsigned char Address,int Count,unsigned int *pData)
{
PORT_MP3_OUT &= ~XCS;	  	   // XCS Low
WriteByteSPI(VS1001_WRITE);
WriteByteSPI(Address);
while(Count--)
			  {
			  WriteByteSPI((unsigned char) ((*pData) >> 8)); 
			  WriteByteSPI((unsigned char) *pData); 
			  }
PORT_MP3_OUT |= XCS;	  	   // XCS High
delay_us(5);
}

//*************************************
// void VS1001_Stream(unsigned char Data,unsigned char Qte)
//*************************************
void VS1001_Stream(unsigned char *Data,unsigned char Qte)
{
while(Qte--)
			{
			PORT_MP3_OUT |= BSYNC;	  	   // BSYNC High
			WDR();
			WDR();
			SPDR = *Data++;
			delay_us(1);
			PORT_MP3_OUT &= ~BSYNC;	  	   // BSYNC Low
			while(!(SPSR & (1<<SPIF)));    // Wait Queue off
			}
}

//*************************************
// void VS1001Init(void)
//*************************************
void VS1001Init(unsigned char HardReset)
{
unsigned int buf[2];
unsigned char null[32];
int i;

if (HardReset == TRUE)
   {
   PORT_MP3_DDR = XRES | BSYNC | XCS | MOSI | SCK | SS;
   SPCR = 0x51;				  	  	// SPI ENABLE, MSB FIRST, MASTER, 
	   						  		// CPOL=0, CPHA=0, CLK/16
						  

   PORT_MP3_OUT = XRES + XCS; 	   		   		   // XCS 1 - RESET 1 - BSYNC 0
   delay_ms(5);	

   PORT_MP3_OUT &= ~XRES;							// Reset is 0
   delay_ms(5);
   PORT_MP3_OUT |= XRES;;							// Reset is 1
   delay_ms(5);
   }

for (i=0;i<32;i++) null[i] = 0;

delay_ms(5);
VS1001_Stream(&null[0],32);						// 32 null's
delay_ms(200);

buf[0] = 0x0004;
VS1001_Write(0,1,buf);
delay_ms(2);
while(!(PORT_MP3_IN & DREQ));					// wait for DREQ

buf[0] = 0x0000;
VS1001_Write(0,1,buf);
delay_ms(2);
while(!(PORT_MP3_IN & DREQ));					// wait for DREQ

buf[0] = 0x9800;								// Clock 12.288Mhz
VS1001_Write(3,1,buf);
VS1001_Stream(&null[0],16);						// 16 null's
VS1001_SetVolume(0,0);
}

//*************************************
// void Reg_Test(void)
//*************************************
unsigned char Reg_Test()
{
unsigned int buf[20];
unsigned int j;

for (j=0;j<20;j++)
	{
	buf[0] = j*256+j;
	VS1001_Write(3,1,buf);
	buf[0] = 0xffff;
	VS1001_Read(3,1,buf);
	if (buf[0] != j*256+j) return 0;
	}
return 1;
}

//*************************************
// void Sine_On(unsigned char Freq)
//*************************************
void Sine_On(unsigned char Freq)
{
unsigned char i,buf[4];

buf[0] = 0x53;
buf[1] = 0xef;
buf[2] = 0x6e;
buf[3] = Freq;
VS1001_Stream(&buf[0],4);

buf[0] = 0x00;
buf[1] = 0x00;
buf[2] = 0x00;
buf[3] = 0x00;
VS1001_Stream(&buf[0],4);
}

//*************************************
// void Sine_Off(void)
//*************************************
void Sine_Off(void)
{
unsigned char i,buf[4];

buf[0] = 0x45;
buf[1] = 0x78;
buf[2] = 0x69;
buf[3] = 0x74;
VS1001_Stream(&buf[0],4);

buf[0] = 0x00;
buf[1] = 0x00;
buf[2] = 0x00;
buf[3] = 0x00;
VS1001_Stream(&buf[0],4);
}

//*************************************
// void Sine_Sweep(void)
//*************************************
void Sine_Sweep(void)
{
unsigned char i;

for (i=48;i<119;i++)
	{
	Sine_Off();
	Sine_On(i);
	delay_ms(25);
	}
Sine_Off();
}

//*************************************
// void VS1001_SetVolume(unsigned char Left,unsigned char Right)
//*************************************
void VS1001_SetVolume(unsigned char Left,unsigned char Right)
{
unsigned int buf[2];

buf[0] = (((unsigned int)Left) << 8) | ((unsigned int)Right);
VS1001_Write(11,1,buf);
}