fat32.h

自己正在开发的一个ARM9的操作系统。详细信息请访问www.another-prj.com

#ifndef _FAT32
#define _FAT32

typedef struct{				//offset(bytes)	len(bytes)	val
	unsigned short 	BPB_BytsPerSec;	//11		2		512	扇区的字节数
	unsigned char 	BPB_SecPerClus;	//13		1		2	每个蔟的扇区数(簇是读写的单位)
	unsigned short 	BPB_RsvdSecCnt;	//14		2		32	Reserved region的sectors(对FAT32来说是32)
	unsigned char 	BPB_NumFATs;	//16		1		2	Fat数据结构数(必须是2)
	unsigned short 	BPB_RootEntCnt;	//17		2		0	(对FAT32来说是0)
	unsigned short 	BPB_TotSec16;	//19		2		0	(对FAT32来说是0)
	unsigned char 	BPB_Media;	//21		1		0xf0	0xf0(removable media) 0xf8(fixed media)
	unsigned short 	BPB_FATSz16;	//22		2		0	(对FAT32来说是0)
	unsigned short 	BPB_SecPerTrk;	//24		2		x	(pc bios int 13)
	unsigned short 	BPB_NumHeads;	//26		2		x	(pc bios int 13)
	unsigned int 	BPB_HiddSec;	//28		4		x	(pc bios int 13)
	unsigned int 	BPB_TotSec32; 	//32		4			FAT32 4个region的扇区数
	unsigned int 	BPB_FATSz32;	//36		4		
	unsigned short 	BPB_ExtFlags;	//40		2		
	unsigned short 	BPB_FSVer;	//42		2		0.0	版本号
	unsigned int 	BPB_RootClus;	//44		4		2
	unsigned short 	BPB_FSInfo;	//48		2		
	unsigned short 	BPB_BkBootSec;	//50		2		0
	unsigned char  	BPB_Reserved[12];//52		12		0	保留区域

}A_BF_BPB;

#endif