vs1001.c

This is the latest VS1053B chip interface routines combined with Elm Chan s FatFs library. Whole cod

/*-----------------------------------------------------------------------*/
/* MMC/SDC (in SPI mode) control module  (C)ChaN, 2006                   */
/*-----------------------------------------------------------------------*/
/* Only rcvr_spi(), xmit_spi(), disk_timerproc(), disk_initialize () and */
/* some macros are platform dependent.                                   */
/*-----------------------------------------------------------------------*/

#include <mega128.h>
#include <delay.h>
#include <stdio.h>
#include <string.h>
#include "integer.h"
#include "types.h"
#include "vs1001.h"
#include "main.h"

#define SPI_LOW() SPSR=0x00;
#define SPI_HIGH() SPSR=0x01;

//#define VS1053

#ifdef VS1053

unsigned char WriteByte(unsigned char data)
{
SPDR = data;
while(!(SPSR & 0x80)); // Wait Queue off
return SPDR;
}

#else

unsigned char WriteByte(unsigned char data)
{
    unsigned char Counter;
    for(Counter = 0; Counter < 8; ++Counter)
    {
        NOP();
        VS_SCK=0;
        if ((data & 128))
        VS_SI=1;
        else VS_SI=0;
        VS_SCK=1;
        NOP();
        data <<= 1;     //shift data left to 1
        if(VS_SO)
        data |= 1;
     }
     return data;         
}
#endif

//*************************************
// void VS1001_Write(unsigned char Address,int Count,unsigned int *pData)
//*************************************
void vs_write(unsigned char addr, unsigned int data)
{
    while(!(DREQ));
    SPI_LOW();
    delay_us(10);
    ENABLE_XCS();          	// select VS1011 via Chip Select

    WriteByte(VS_WRITE);	// send write opcode
    WriteByte(addr);	        // send address
    WriteByte(data >> 8);	    // send MSB
    WriteByte(data);	        // send LSB

    DISABLE_XCS();	// deselect VS1011 via Chip Select
    delay_us(10);
    SPI_HIGH();
    while(!(DREQ));
}

//*************************************
// void VS1001_Read(unsigned char Address,int Count,unsigned int *pData)
//*************************************

unsigned int vs_read(unsigned char addr)
{

    unsigned int tempdata = 0;
    while(!(DREQ));
    SPI_LOW();
    delay_us(10);
    ENABLE_XCS();          	// select VS1011 via Chip Select

    WriteByte(VS_READ);	// send read opcode
    WriteByte(addr);	// send address

    tempdata = WriteByte(0);	// send zero dummy to receive one byte and MSB was sent first		
    tempdata <<= 8; 
    tempdata += WriteByte(0);	// send zero dummy to receive one byte
    DISABLE_XCS();	// deselect VS1011 via Chip Select
    delay_us(10);
    SPI_HIGH();
    while(!(DREQ));
    return tempdata;		// return data word
}

//*************************************
// void VS1001_Stream(unsigned char Data,unsigned char Qte)
//*************************************
void vs_stream(unsigned char *Data, unsigned char Qte)
{
ENABLE_XDCS();//BSYNC=0;
while(Qte--) WriteByte(*Data++);
DISABLE_XDCS();//BSYNC=1;
}
//*************************************
// void VS1001Init(void)
//*************************************
void vs_init(unsigned char HardReset)
{
unsigned int ClockF;

#ifdef VS1053
unsigned int SC_Mult;
unsigned int SC_Add;
unsigned int SC_Freq;

//囗嚯钽梓眍 蜞犭桷