#ifdef fat_h
#define MAXFILES 1					//設(shè)置系統(tǒng)中最多同時打開的文件的個數(shù)
typedef unsigned char UCHAR;
typedef unsigned int   UINT;
typedef unsigned long ULONG;
typedef unsigned char uchar;
typedef unsigned int uint;
typedef unsigned long ulong;
typedef unsigned char u8;
typedef unsigned short int u16;
typedef unsigned long u32;
typedef unsigned short int WORD;
typedef unsigned char BYTE;
typedef unsigned long DWORD;

// BIOS 參數(shù)塊
struct bpb710 {
		WORD	bpbBytesPerSec;	// 每扇區(qū)字節(jié)數(shù)						2	0x0b		
		BYTE	bpbSecPerClust;	// 每簇扇區(qū)數(shù)						1	0x0d
		WORD	bpbResSectors;	// 保留區(qū)域中的保留扇區(qū)數(shù)		2	0x0e
		BYTE	bpbFATs;		// FAT表的份數(shù)						1	0x10
		WORD	bpbRootDirEnts;	// 根目錄項數(shù)						2	0x11
		WORD	bpbSectors;		// 此域為存儲卷上的扇區(qū)總數(shù)	2	0x13
		BYTE	bpbMedia;		// 固定存儲介質(zhì)描述				1	0x15

		WORD	bpbFATsecs;		// FAT表所占的扇區(qū)數(shù)				2	0x16
		
		WORD	bpbSecPerTrack;	// 每道扇區(qū)數(shù)
		WORD	bpbHeads;		// 磁頭數(shù)
		DWORD	bpbHiddenSecs;	// 隱藏扇區(qū)數(shù)
		DWORD	bpbHugeSectors;	// 總扇區(qū)數(shù)

		DWORD     bpbBigFATsecs;// 每個FAT區(qū)所占扇區(qū)數(shù)
		WORD      bpbExtFlags;	// 擴展標(biāo)志
#define FATNUM    0xf			
#define FATMIRROR 0x80			
		WORD      bpbFSVers;	// 文件系統(tǒng)版本
#define FSVERS    0				
		DWORD     bpbRootClust;	// 根目錄簇號
		WORD      bpbFSInfo;	// 文件系統(tǒng)信息扇區(qū)號
		WORD      bpbBackup;	// 備份引導(dǎo)扇區(qū)
};

typedef struct
{
	u8 FileName[11];
	u8 FileAttrib;
	u8 UnUsed[8];
	u16	StartHight;	
	u8 FileUpdateTime[2];
	u8 FileUpdateData[2];
	u16	StartLow;
	u32 Size;
}FFS;		//Fat File struction

typedef struct
{
	u32 StartClust;	//當(dāng)不為0 代表這個文件已經(jīng)被打開
	u32 Size;
	u32 FatPos;		//記錄所在FAT 表格中的位置	為以后文件修改做的記錄
	u32 Seek;		//文件操作指針
	u32 CurClust;
	u32 CurSector;
}FOPT;

#endif


unsigned long FatSetBlock0();
unsigned char FatReadBlock(ULONG addr);
void InitFat32();

unsigned char fopen( const unsigned char *file);
unsigned char fread(void *save,unsigned long len,unsigned char file_number);
unsigned char fclose(unsigned char file_number);
unsigned char fseek(unsigned char file_number,unsigned long addr,unsigned char type);		//文件定位	主要設(shè)置 clust sector and seek
unsigned long ftell(unsigned char file_number);
void fprtfile(unsigned char file_number);