#include <iom64v.h>
#include <macros.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)
void delay_nnus(unsigned int n)
	{
	unsigned char  b;
		for (b = 1; b<n; b++)
			;
	}

//SPI initialize
void spi_init(void)
{
 DDRB = 0xBF;    //SI輸入，SO，SCK，SS輸出
 SPCR = 0x51;  //setup SPI
 SPSR = 0x00;  //setup SPI
}
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;
}
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 vs1003_cmd_write(uchar address,uint data)
{ 
//==============新增
SPCR = 0x53;  //
SPSR = 0x00;  //低速度spi
//============== 
MP3_PORT|=MP3_DATA_CS;       //MP3_DATA_CS=1;
MP3_PORT&=~MP3_CMD_CS;       //MP3_CMD_CS=0;
Write_Byte_SPI(0x02);      //VS1011的寫命令
delay_nnus(20);
Write_Byte_SPI(address);   //地址
Write_Byte_SPI(data>>8);
Write_Byte_SPI(data);
delay_nnus(20);
MP3_PORT|=MP3_CMD_CS;       //MP3_CMD_CS=1;
//==============以下新增
SPCR = 0x50;  //
SPSR = 0x01;  //高速spi
//========================= 
} 

void vs1003_data_write(uchar data)
{
MP3_PORT&=~MP3_DATA_CS;         //MP3_DATA_CS=0;
Write_Byte_SPI(data);
MP3_PORT|=MP3_DATA_CS;         //MP3_DATA_CS=1;
MP3_PORT|=MP3_CMD_CS;         //MP3_CMD_CS=1; 
}

uint vs1003_read(uchar address)
{
uchar temp1=0;
uint temp=0; 
MP3_PORT|=MP3_DATA_CS;        //MP3_DATA_CS=1;
MP3_PORT&=~MP3_CMD_CS;        //MP3_CMD_CS=0;
Write_Byte_SPI(0x03);      //VS1011的讀命令
delay_nnus(30);
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;       //MP3_CMD_CS=1;
return temp;

}

void vs1003_init(void)
{
vs1003_cmd_write(0x0b,0X1010);    //VOLUME
vs1003_cmd_write(0x00,0x0800);     //NEW MODE
vs1003_cmd_write(0x02,0X1fff);       //BASS
vs1003_cmd_write(0x03,0X4000);     //CLOCK F
vs1003_cmd_write(0x03,0X4000);     //CLOCK F
}