sd.h

以AVRMEGA32播放SD卡中的WAV音乐

#ifndef __MMC_SD_h__
#define __MMC_SD_h__

#define uint8  unsigned char
#define  int8    signed char
#define uint16 unsigned int
#define  int16   signed int
#define uint32 unsigned long
#define  int32   signed long




 
#define DDR_INI()  DDRB |=0xbf  
#define SPI_CS_Assert()   PORTB.2=0  
#define SPI_CS_Deassert() PORTB.2=1

extern uint8 MMC_SD_SendCommand(uint8 cmd, uint32 arg);
extern void MMC_SD_Init (void); 

extern uint8 MMC_SD_Reset(void);

extern uint8 MMC_SD_ReadSingleBlock(uint32 sector, uint8* buffer);

extern void SPI_High(void);


#endif