fat32.h

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#ifndef __FAT32_H__
#define __FAT32_H__
#include "config.h"
/* 检测卡是否完全插入  check weather card is insert entirely */
#define UARTBUF_LENGTH  32
#define BUFFER_LENGTH	512

typedef struct
{
	UINT32 StartSector;
	UINT32 TotalSector;
  
	UINT16 BPB_BytesPerSec;
	UINT8 BPB_SecPerClus;
  
	UINT8 BPB_NumFATs;
	UINT16 BPB_RootEntCnt;
	UINT16 BPB_TotSec16;
	UINT32 BPB_TotSec32;
	UINT32 FatStartSector;
	UINT32 RootStartSector;
	UINT32 FirstDataSector;
	UINT32 BPB_FATSz32;
	UINT32 RootStartCluster;
	UINT32 TotCluster;
}SYS_INFO_BLOCK;

typedef struct{
  UINT8 bFileOpen;
  UINT32 StartCluster;
  UINT32 LengthInByte;
  UINT32 ClusterPointer;
  UINT32 SectorPointer;
  UINT16 OffsetofSector;
  UINT8 SectorofCluster;
  UINT32 pointer;
  UINT32 FatSectorPointer;
}FILE_INFO;

extern SYS_INFO_BLOCK  DeviceInfo;
extern FILE_INFO  ThisFile;

extern UINT8  DBUF[BUFFER_LENGTH];
extern UINT8 UARTBUF[UARTBUF_LENGTH];
extern UINT32  DirStartCluster32,NowCluster32;
extern UINT32 NowSector;

extern UINT16 LSwapINT16(UINT16 dData1,UINT16 dData2);
extern UINT32 LSwapINT32(UINT32 dData1,UINT32 dData2,UINT32 dData3,UINT32 dData4);
extern UINT8 EnumSdDev(void);
extern UINT32 FirstSectorofCluster(UINT32 clusterNum);
extern UINT32 ThisFatSecNum(UINT32 clusterNum);
extern UINT32 ThisFatEntOffset(UINT32 clusterNum);
extern UINT32 GetNextClusterNum(UINT32 clusterNum);
extern UINT8 GoToPointer(UINT32 pointer);
extern UINT32 CreateClusterLink(UINT32 currentCluster);
#endif