fs_fat.h

TELECHIPS MP3解决方案UMS实现源代码

#ifndef __FS_FAT_H__
#define __FS_FAT_H__

#define MSDOS_FAT_MAGIC		0x55aa

#pragma packed on
typedef struct __tag_fat_PartitionEntry
{
	unsigned char		bDefBootPartition;
	unsigned char		bStartHead;					// Zero Base
	unsigned char		bStartSector;				// One Base
	unsigned char		bStartCylinder;
	unsigned char		bPartitionType;
	unsigned char		bEndHead;					// Zero Base
	unsigned char		bEndSector;					// One Base
	unsigned char		bEndCylinder;
	unsigned long int	dwPartitionBootSector;
	unsigned long int	dwNumberOfSector;
} FAT_PARTITION_ENTRY;
#pragma packed off

// MBR, Master Boot Record Configuration
#pragma packed on
typedef struct __tag_fat_MBR
{
	unsigned char		MBR_BootCode[446];			// 
	FAT_PARTITION_ENTRY	MBR_PartitionEntry[4];		// 446	16*4
	unsigned short int	MBR_wSignature;				// 510	2
} FAT_MBR;
#pragma packed off

// Partition Boot Record Configurations

#pragma packed on
typedef struct __tag_fat_PBR_HEAD
{													// 	ofs	size
	unsigned char		BS_BootJump[3];				// 	0	3
	unsigned char		BS_OEMName[8];				//	3	8

	unsigned short int 	BPB_wBytePerSector;			//	11	2
	unsigned char		BPB_bSectorPerCluster;		//	13	1
	unsigned short int	BPB_wReservedSector;		//	14	2

	unsigned char		BPB_bFATCount;				//	16	1
	unsigned short int	BPB_wRootEntryCount;		// 	17	2	FAT12 & FAT16 only
	unsigned short int	BPB_wTotalSector16;			//	19	2
	unsigned char		BPB_bMediaType;				//	21	1
	unsigned short int	BPB_wFATSize16;				//	22	2	FAT12 & FAT16 only
	unsigned short int	BPB_wSectorPerTrack;		//	24	2
	unsigned short int	BPB_wNumberOfHead;			//	26	2
	unsigned long int	BPB_dwHiddenSector;			//	28	4
	unsigned long int	BPB_dwTotalSector32;		//	32	4
} FAT_PBR_HEAD;										//  36
#pragma packed off

#pragma packed on
typedef struct __tag_fat_PBR_TAIL
{													// 	ofs16	ofs32	size
	unsigned char		BS_bDriverNum;				//	36		64		1
	unsigned char		BS_bReserved1;				//	37		65		1
	unsigned char		BS_bBootSignature;			//	38		66		1
	unsigned char		BS_VolumeID[4];				//	39		67		4
	unsigned char		BS_VolumeLabel[11];			//	43		71		11
	unsigned char		BS_FileSysType[8];			// 	54		82		8	"FAT12   "/"FAT16   "/"FAT32   "
} FAT_PBR_TAIL;										//  62		90
#pragma packed off



#pragma packed on
typedef struct __tag_fat_PBR
{													// 	ofs	size
	unsigned char		BS_BootJump[3];				// 	0	3
	unsigned char		BS_OEMName[8];				//	3	8

	unsigned short int 	BPB_wBytePerSector;			//	11	2
	unsigned char		BPB_bSectorPerCluster;		//	13	1
	unsigned short int	BPB_wReservedSector;		//	14	2

	unsigned char		BPB_bFATCount;				//	16	1
	unsigned short int	BPB_wRootEntryCount;		// 	17	2	FAT12 & FAT16 only
	unsigned short int	BPB_wTotalSector16;			//	19	2
	unsigned char		BPB_bMediaType;				//	21	1
	unsigned short int	BPB_wFATSize16;				//	22	2	FAT12 & FAT16 only
	unsigned short int	BPB_wSectorPerTrack;		//	24	2
	unsigned short int	BPB_wNumberOfHead;			//	26	2
	unsigned long int	BPB_dwHiddenSector;			//	28	4
	unsigned long int	BPB_dwTotalSector32;		//	32	4

	unsigned char		BS_Extra[474];				//  36  474
	unsigned short int	PBR_wSignature;				// 510	2
} FAT_PBR;											// 512
#pragma packed off

#pragma packed on
typedef struct __tag_fat16_PBR
{
	FAT_PBR_HEAD		head;
	FAT_PBR_TAIL		tail;
} FAT16_PBR;										//  62
#pragma packed off

#pragma packed on
typedef struct __tag_fat32_PBR
{
	FAT_PBR_HEAD		head;
	
	unsigned long int	BPB_dwFATSize32;			//	36	4
	unsigned short int	BPB_wExtendedFlags;			//	40	2
	unsigned short int	BPB_wFileSysVersion;		//	42	2
	unsigned long int	BPB_dwRootClusterNumber;	//	44	4
	unsigned short int	BPB_wFileSysInfo;			//	48	2
	unsigned short int	BPB_wBackupBootSector;		//	50	2
	unsigned char		BPB_Reserved[12];			//	52	12

	FAT_PBR_TAIL		tail;
} FAT32_PBR;										//  90
#pragma packed on

#define FAT_FILE_ATTR_READONLY			0x01
#define FAT_FILE_ATTR_HIDDEN			0x02
#define FAT_FILE_ATTR_SYSTEM			0x04
#define FAT_FILE_ATTR_VOLUME			0x08
#define FAT_FILE_ATTR_DIRECTORY			0x10
#define FAT_FILE_ATTR_ARCHIVE			0x20

#define FAT_FILE_LONG_NAME_MASK			0x3f
#define FAT_FILE_LONG_NAME				(FAT_FILE_ATTR_READONLY |	\
										 FAT_FILE_ATTR_HIDDEN   |	\
										 FAT_FILE_ATTR_SYSTEM	|	\
										 FAT_FILE_ATTR_VOLUME)
#pragma packed on
typedef struct __tag_DirectoryEntry
{
	unsigned char		szShortName[11];
	unsigned char		bAttrib;
	unsigned char		bReserved1;
	unsigned char		bCreateTimeTenth;
	unsigned short int	wCreateTime;
	unsigned short int	wCreateDate;
	unsigned short int	wLastAccessDate;
	unsigned short int	wStartClusterHi;
	unsigned short int	wLastWriteTime;
	unsigned short int	wLastWriteDate;
	unsigned short int	wStartClusterLo;
	unsigned long int	dwFileSize;
} FAT_DIRECTORY_ENTRY;
#pragma packed off

#pragma packed on
typedef struct __tag_LongDirectoryEntry
{
	unsigned char		bOrder;
	unsigned short int	wszName1[5];
	unsigned char		bAttrib;			// must be FAT_FILE_LONG_NAME
	unsigned char		bType;
	unsigned char		bChecksum;
	unsigned short int	wszName2[6];
	unsigned short int	wReserved1;
	unsigned short int	wszName3[2];
} FAT_LONG_DIRECTORY_ENTRY;

#pragma packed off

#endif