m64_sd_vs1003.c

一个基于ATmega64、VS1003、SD卡的mp3播放程序

#include <avr/io.h>
#include <avr/interrupt.h>
#include <includes.h>
#include <stdio.h>
#include <VS1003B.c>



unsigned char Sector_Buffer[513]={0};

extern void show_lcd();
//UART0 initialize
// desired baud rate: 115200
// actual: baud rate:115198 (0.0%)
// char size: 8 bit
// parity: Disabled
void uart0_init(void)
{
 UCSR0B = 0x00; //disable while setting baud rate
 UCSR0A = 0x00;
 UCSR0C = 0x06;
 UBRR0L = 0x05; //set baud rate lo
 UBRR0H = 0x00; //set baud rate hi
 UCSR0B = 0x18;
}


//UART1 initialize
// desired baud rate:115200
// actual baud rate:115198 (0.0%)
void uart1_init(void)
{
 UCSR1B = 0x00; //disable while setting baud rate
 UCSR1A = 0x00;
 UCSR1C = 0x06;
 UBRR1L = 0x05; //set baud rate lo
 UBRR1H = 0x00; //set baud rate hi
 UCSR1B = 0x18;
}
void Delay(unsigned int n)//延时
{
	while(n--)asm("nop");
}

int main(void)
{
  //unsigned long temp;
  unsigned int temp1;
  unsigned int i;
  unsigned char retry=0;
  PORTB=0xff;
  DDRG=0x01;
  PORTG=0xfe;
  DDRD=0XFF;
  SPI_PORT_INIT();
  PORTD|=(1<<3);
  //show_lcd();
//SD_SPI_Init();
  SD_SPI_High();
  PORTD&=~(1<<3);
  uart0_init();
  SD_Init();//初始化spi口
  if(VS1003B_Init()){
  UDR0=0XAA;
  while((UCSR0A&(1<<TXC0))==0);
  UCSR0A|=(1<<TXC1);}
/*  while(1)
  {
  VS1003B_WriteCMD(0x0b,0xFFFF);
  VS1003B_ReadCMD(0x0b);
  VS1003B_ReadCMD(0x0b);
  VS1003B_ReadCMD(0x0b);
  UDR0=VS1003B_ReadCMD(0x0b);
  while((UCSR0A&(1<<TXC0))==0);
  UCSR0A|=(1<<TXC1);
  Delay(32767);
  Delay(32767);
  Delay(32767);
  Delay(32767);
  Delay(32767);
  Delay(32767);
  VS1003B_WriteCMD(0x0b,0x0000);
  VS1003B_ReadCMD(0x0b);
  VS1003B_ReadCMD(0x0b);
UDR0=VS1003B_ReadCMD(0x0b);
  while((UCSR0A&(1<<TXC0))==0);
  UCSR0A|=(1<<TXC1);
  Delay(32767);
  Delay(32767);
  Delay(32767);
  Delay(32767);
  Delay(32767);
  Delay(32767);


}*/
  while(SD_Reset())//初始化SD卡					//sd card initialize
	{
		retry++;
		if(retry>20)
		{
		for(i=0;i<4;i++)
         {
           UDR0=0xaa;
	       while((UCSR0A&(1<<TXC0))==0);
	       UCSR0A|=(1<<TXC0);
         }
		 break;
		}
	}
i=Get_FAT_Basic_Info(); 
temp1=Root_Dir();

 while (1);
}