filesystem.h

在BF533上实现FAT32文件系统文件系统的源码,有兴趣的可以看看.

#include "type.h"

#define PARTITION_TABLE_1	(0x1BE)
#define PARTITION_TABLE_2	(0x1CE)
#define PARTITION_TABLE_3	(0x1DE)
#define PARTITION_TABLE_4	(0x1EE)
#define PARTITION_TABLE_SIZE	(16)

#define ACTICE_FLAG	(0)
#define START_HEAD	(1)
#define START_SECTOR	(2)
#define START_CYLINDER	(2)
#define SYSTEM_ID	(4)
#define END_HEAD	(5)
#define END_SECTOR	(6)
#define END_CYLINDER	(6)
#define OFFSET_SECTOR	(8)
#define TOTAL_SECTOR	(12)

#define SIGN_POSITION		(0x1FE)

#define SIGN_VALUE		(0xAA55)

//File system type
#define FAT32_TYPECODE1		(0x01)
#define FAT32_TYPECODE2		(0x0B)
#define FAT32_TYPECODE3		(0x0C)
#define FAT16_TYPECODE1		(0x04)
#define FAT16_TYPECODE2		(0x06)
#define FAT16_TYPECODE3		(0x0E)

#define EXT_TYPECODE1		(0x05)
#define EXT_TYPECODE2		(0x0F)

#define FS_TYPE_FAT12		(0x00)
#define FS_TYPE_FAT16		(0x01)
#define FS_TYPE_FAT32		(0x02)

#define NO_PARTITION		(0x00)

#define FILE_LABEL_SHORTNAME	(0x00)
#define FILE_LABEL_RESERVE1	(0x0C)
#define FILE_LABEL_CREATETIME10ms	(0x0D)
#define FILE_LABEL_CREATETIME	(0x0E)
#define FILE_LABEL_CREATEDATE	(0x10)
#define FILE_LABEL_LASTVISITDATE	(0x12)
#define FILE_LABEL_CLUSTERHIGH	(0x14)
#define	FILE_LABEL_LASTEDITTIME	(0x16)
#define FILE_LABEL_LASTEDITDATE	(0x18)
#define FILE_LABEL_CLUSTERLOW	(0x1A)
#define FILE_LABEL_FILESIZE	(0x1C)

typedef struct{
	BYTE short_name[11];
	BYTE type;
	BYTE reserve1;
	BYTE create_time_10ms;
	WORD create_time;
	WORD create_date;
	WORD last_visit_date;
	WORD cluster_high;
	WORD last_edit_time;
	WORD last_edit_date;
	WORD cluster_low;
	DWORD filesize;
}file_label_t;
typedef struct{
	BYTE num;
	WORD name1[5];
	BYTE flag;
	BYTE reserve;
	BYTE chksum;
	WORD name2[6];
	WORD startcluster;
	WORD name3[2];
}lfn_label_t;
	
//-----------------------------------------------------------------------------
// FAT32 File Attributes and Types
//-----------------------------------------------------------------------------
#define FILE_ATTR_READ_ONLY   	0x01
#define FILE_ATTR_HIDDEN 		0x02
#define FILE_ATTR_SYSTEM 		0x04
#define FILE_ATTR_SYSHID		0x06
#define FILE_ATTR_VOLUME_ID 	0x08
#define FILE_ATTR_DIRECTORY		0x10
#define FILE_ATTR_ARCHIVE  		0x20
#define FILE_ATTR_LFN_TEXT		0x0F
#define FILE_HEADER_BLANK		0x00
#define FILE_HEADER_DELETED		0xE5


//#define NULL 0

typedef struct{

	WORD	byte_per_sector;
	BYTE	sector_per_cluster;
	WORD	reserve_sector;
	BYTE	FATnum;
	WORD	root_entrice;
	BYTE	media_descriptor;
	WORD	sector_per_track;
	WORD	head_num;
	DWORD	hide_sector;
	DWORD	sector_num;
	DWORD	sector_per_FAT;
	WORD	flag;
	WORD	version;
	DWORD	root_cluster;
	DWORD	FSinfo_sector;
	WORD	backup_sector;
	BYTE	res2[12];
	
	BYTE	bios_drive;
	BYTE	res3;
	BYTE	ext_boot_sign;
	DWORD	serial_num;
	char	label[11];
	char	file_system[8];
	
}BPB_t;


typedef struct{
	BPB_t 		bpb;
	BYTE 		fs_type;
	DWORD		byte_per_cluster;
	DWORD 		fat_begin_lba;
	DWORD 		cluster_begin_lba;
	DWORD		total_cluster;
}FS_t;

extern FS_t *current_fs;

typedef void (*fnFS_init_t)(FS_t *,DWORD);

typedef struct{
	WORD	flag;
	DWORD 	offset_sector;
	DWORD 	total_sector;
	FS_t  	*fs;
	fnFS_init_t 	fnFS_init;
}partition_table_t;

extern partition_table_t *partition_table[23];

extern void fnPartition_init(BYTE* ,BYTE);


typedef struct{
	DWORD value;
	DWORD offset;
}currentcluster_t;

extern currentcluster_t fnGetCurrentCluster(DWORD ,DWORD);
extern currentcluster_t fnFAT32_SectorReader(currentcluster_t cluster, DWORD offset);

typedef struct{
	WORD	flag;
	DWORD	startcluster;
	currentcluster_t currentcluster;
	//DWORD	buffer_size;
	//BYTE	*buffer
	DWORD	curp;
	BYTE	filename[257];
	BYTE	type;
	DWORD	filesize;
	DWORD listp;
	DWORD up_folder;
}FILE_t;

typedef struct{
	FILE_t** list;
	DWORD    num;
}FILELIST_t;

extern void fnDetect_Partition(void);
extern DWORD fnDetectDirectory(DWORD startcluster);
extern FILE_t *fnCreateFile(DWORD startcluster,BYTE *name);


#define __tolower(x) ((x<='Z'&&x>='A')?(x+0x20):x)
#define __toupper(x) ((x<='z'&&x>='a')?(x-0x20):x)

//#ifndef STDIO_H
//#define STDIO_H

#ifndef SEEK_SET
#define 	SEEK_SET (0)
#define 	SEEK_CUR (1)
#define 	SEEK_END (2)
#endif

#define    IOFBF				0x00
#define    IOLBF				0x01
#define	IONBF				0x02
#define  	MODE_BUF			0x03
#define 	MODE_FREEBUF		0x04
#define 	MODE_FREEFILE		0x08
#define 	MODE_READ		0x10
#define 	MODE_WRITE		0x20
#define 	MODE_RDWR		0x30
#define 	MODE_READING	0x40
#define 	MODE_WRITING	0x80
#define 	MODE_EOF			0x100
#define		MODE_ERR		0x200
#define 	MODE_UNGOT		0x400
#define		MODE_OPEN		0x800

#define		O_APPEND	(0x01)
#define 	O_CREAT		(0x02)
#define		O_EXCL		(0x04)
#define 	O_RDONLY	(0x08)
#define 	O_RDWR		(0x10)
#define		O_TRUNC		(0x20)
#define		O_WRONLY	(0x40)

#define 	FIND_FILE_MODE (0)
#define		FIND_DIR_MODE  (1)
#define 	FIND_ALL_MODE	(2)

#define EOF	(-1)
#define NULL	(0)

extern FILELIST_t* fnListDirectory(DWORD startcluster);
extern FILE_t *fnFindFile(DWORD startcluster,BYTE *filename,BYTE mode);
extern FILE_t * fnOpenFile(FILE_t* fp,BYTE mode);

//#define FILE FILE_t

//extern FILE stdin[1];
//extern FILE stdout[1];
//extern FILE stderr[1];

//extern FILE *fopen(BYTE * path,BYTE * mode);
//extern DWORD fread(BYTE * buffer,BYTE size, DWORD count, FILE *fp);
//extern DWORD fwrite(BYTE * buffer,BYTE size, DWORD count, FILE *fp);
//extern BYTE  fgetc(FILE *fp);
//extern BYTE fputc(BYTE ch,FILE *fp);

//#endif