📄 fat16.h
字号:
#ifndef FAT_H
#define FAT_H
#ifndef BYTE
typedef unsigned char BYTE;
typedef unsigned char U8;
#endif
#ifndef CHAR
typedef char CHAR;
#endif
#ifndef WORD
typedef unsigned short WORD;
#endif
#ifndef DWORD
typedef unsigned long DWORD;
#endif
#define CLUST_FIRST 0 // first legal cluster number(for PART_TYPE_FAT16xxx)
// Format of a boot sector. This is the first sector on a DOS floppy disk
// or the first sector of a partition on a hard disk. But, it is not the
// first sector of a partitioned hard disk.
#define NAND_FLASH_Drv 1
#define DRIVE0 NAND_FLASH_Drv
#define FAT12_MASK 0x00000fff // mask for 12 bit cluster numbers
#define FAT16_MASK 0x0000ffff // mask for 16 bit cluster numbers
#define FAT32_MASK 0x0fffffff // mask for FAT32 cluster numbers
// Partition Type used in the partition record
#define PART_TYPE_UNKNOWN 0x00
#define PART_TYPE_FAT12 0x01
#define PART_TYPE_XENIX 0x02
#define PART_TYPE_DOSFAT16 0x04
#define PART_TYPE_EXTDOS 0x05
#define PART_TYPE_FAT16 0x06
#define PART_TYPE_NTFS 0x07
#define PART_TYPE_FAT32 0x0B
#define PART_TYPE_FAT32LBA 0x0C
#define PART_TYPE_FAT16LBA 0x0E
#define PART_TYPE_EXTDOSLBA 0x0F
#define PART_TYPE_ONTRACK 0x33
#define PART_TYPE_NOVELL 0x40
#define PART_TYPE_PCIX 0x4B
#define PART_TYPE_PHOENIXSAVE 0xA0
#define PART_TYPE_CPM 0xDB
#define PART_TYPE_DBFS 0xE0
#define PART_TYPE_BBT 0xFF
//MBR struct
typedef __packed struct
{
CHAR psPartCode[512-64-2]; // pad so struct is 512b
BYTE psPart[64]; // four partition records (64 bytes)
BYTE psBootSectSig0; // two signature bytes (2 bytes)
BYTE psBootSectSig1;
#define BOOTSIG0 0x55
#define BOOTSIG1 0xaa
}PARTSECTOR;
//partition record information
typedef __packed struct // length 16 bytes
{
BYTE prIsActive; // 0x80 indicates active partition
BYTE prStartHead; // starting head for partition
WORD prStartCylSect; // starting cylinder and sector
BYTE prPartType; // partition type (see above PART_TYPE_XXX)
BYTE prEndHead; // ending head for this partition
WORD prEndCylSect; // ending cylinder and sector
DWORD prStartLBA; // first LBA sector for this partition
DWORD prSize; // size of this partition (bytes or sectors ?sector)
}PARTRECORD;
//boot sector for dos3.3
typedef __packed struct {
BYTE bsJump[3]; // jump inst E9xxxx or EBxx90
CHAR bsOemName[8]; // OEM name and version
CHAR bsBPB[19]; // BIOS parameter block
CHAR bsDriveNumber; // drive number (0x80)
CHAR bsBootCode[479]; // pad so struct is 512b
BYTE bsBootSectSig0; // boot sector signature byte 0x55
BYTE bsBootSectSig1; // boot sector signature byte 0xAA
#define BOOTSIG0 0x55
#define BOOTSIG1 0xaa
}BOOTSECTOR33 ;
typedef __packed struct {
CHAR exDriveNumber; // drive number (0x80)
CHAR exReserved1; // reserved
CHAR exBootSignature; // ext. boot signature (0x29)
#define EXBOOTSIG 0x29
DWORD exVolumeID; // volume ID number
CHAR exVolumeLabel[11]; // volume label
CHAR exFileSysType[8]; // fs type (FAT12 or FAT16)
}EXTBOOT;
//boot sector for dos5.0
typedef __packed struct {
BYTE bsJump[3]; // jump inst E9xxxx or EBxx90
CHAR bsOemName[8]; // OEM name and version
CHAR bsBPB[25]; // BIOS parameter block
CHAR bsExt[26]; // Bootsector Extension
CHAR bsBootCode[448]; // pad so structure is 512b
BYTE bsBootSectSig0; // boot sector signature byte 0x55
BYTE bsBootSectSig1; // boot sector signature byte 0xAA
#define BOOTSIG0 0x55
#define BOOTSIG1 0xaa
}BOOTSECTOR50;
//boot sector for dos7.1
typedef __packed struct {
BYTE bsJump[3]; // jump inst E9xxxx or EBxx90
CHAR bsOEMName[8]; // OEM name and version
CHAR bsBPB[53]; // BIOS parameter block
CHAR bsExt[26]; // Bootsector Extension
CHAR bsBootCode[418]; // pad so structure is 512b
BYTE bsBootSectSig2; // 2 & 3 are only defined for FAT32?
BYTE bsBootSectSig3;
BYTE bsBootSectSig0; // boot sector signature byte 0x55
BYTE bsBootSectSig1; // boot sector signature byte 0xAA
#define BOOTSIG0 0x55
#define BOOTSIG1 0xaa
#define BOOTSIG2 0
#define BOOTSIG3 0
}BOOTSECTOR710;
/***************************************************************/
/***************************************************************/
// BIOS Parameter Block (BPB) for DOS 3.3
typedef __packed struct {
WORD bpbBytesPerSec; // bytes per sector
BYTE bpbSecPerClust; // sectors per cluster
WORD bpbResSectors; // number of reserved sectors
BYTE bpbFATs; // number of FATs
WORD bpbRootDirEnts; // number of root directory entries
WORD bpbSectors; // total number of sectors
BYTE bpbMedia; // media descriptor
WORD bpbFATsecs; // number of sectors per FAT
WORD bpbSecPerTrack; // sectors per track
WORD bpbHeads; // number of heads
WORD bpbHiddenSecs; // number of hidden sectors
}BPB33;
// BPB for DOS 5.0
// The difference is bpbHiddenSecs is a short for DOS 3.3,
// and bpbHugeSectors is not present in the DOS 3.3 bpb.
typedef __packed struct {
WORD bpbBytesPerSec; // bytes per sector
BYTE bpbSecPerClust; // sectors per cluster
WORD bpbResSectors; // number of reserved sectors
BYTE bpbFATs; // number of FATs
WORD bpbRootDirEnts; // number of root directory entries
WORD bpbSectors; // total number of sectors
BYTE bpbMedia; // media descriptor
WORD bpbFATsecs; // number of sectors per FAT
WORD bpbSecPerTrack; // sectors per track
WORD bpbHeads; // number of heads
DWORD bpbHiddenSecs; // # of hidden sectors
// 3.3 compat ends here
DWORD bpbHugeSectors; // # of sectors if bpbSectors == 0
}BPB50;
// BPB for DOS 7.10 (FAT32)
// This one has a few extensions to bpb50.
typedef __packed struct {
WORD bpbBytesPerSec; // bytes per sector
BYTE bpbSecPerClust; // sectors per cluster
WORD bpbResSectors; // number of reserved sectors
BYTE bpbFATs; // number of FATs
WORD bpbRootDirEnts; // number of root directory entries
WORD bpbSectors; // total number of sectors
BYTE bpbMedia; // media descriptor
WORD bpbFATsecs; // number of sectors per FAT
WORD bpbSecPerTrack; // sectors per track
WORD bpbHeads; // number of heads
DWORD bpbHiddenSecs; // # of hidden sectors
// 3.3 compat ends here
DWORD bpbHugeSectors; // # of sectors if bpbSectors == 0
// 5.0 compat ends here
DWORD bpbBigFATsecs;// like bpbFATsecs for FAT32
WORD bpbExtFlags; // extended flags:
#define FATNUM 0xf // mask for numbering active FAT
#define FATMIRROR 0x80 // FAT is mirrored (like it always was)
WORD bpbFSVers; // filesystem version
#define FSVERS 0 // currently only 0 is understood
DWORD bpbRootClust; // start cluster for root directory
WORD bpbFSInfo; // filesystem info structure sector
WORD bpbBackup; // backup boot sector
// There is a 12 byte filler here, but we ignore it
}BPB710;
// Structure of a dos directory entry.
typedef __packed struct
{
BYTE deName[8]; // filename, blank filled
#define SLOT_EMPTY 0x00 // slot has never been used
#define SLOT_E5 0x05 // the real value is 0xe5
#define SLOT_DELETED 0xe5 // file in this slot deleted
#define IS_DIR 0x2e // this is directory
char deExtension[3]; // extension, blank filled
BYTE deAttributes; // file attributes
#define ATTR_NORMAL 0x00 // normal file
#define ATTR_READONLY 0x01 // file is readonly
#define ATTR_HIDDEN 0x02 // file is hidden
#define ATTR_SYSTEM 0x04 // file is a system file
#define ATTR_VOLUME 0x08 // entry is a volume label
#define ATTR_LONG_FILENAME 0x0f // this is a long filename entry
#define ATTR_DIRECTORY 0x10 // entry is a directory name
#define ATTR_ARCHIVE 0x20 // file is new or modified
BYTE deLowerCase; // NT VFAT lower case flags
#define LCASE_BASE 0x08 // filename base in lower case
#define LCASE_EXT 0x10 // filename extension in lower case
BYTE CrtTimeTenth; // hundredth of seconds in CTime
WORD CrtTime; // create time
WORD CrtDate; // create date
WORD LstAccDate; // access date
WORD FstClusHI; // high bytes of cluster number
WORD WrtTime; // last update time
WORD WrtDate; // last update date
WORD deStartCluster; // starting cluster of file
DWORD deFileSize; // size of file in bytes
}DIRENTRY;
// Structure of a Win95 long name directory entry
typedef __packed struct
{
BYTE weCnt;
#define WIN_LAST 0x40
#define WIN_CNT 0x3f
BYTE wePart1[10];
BYTE weAttributes;
#define ATTR_WIN95 0x0f
BYTE weReserved1;
BYTE weChksum;
BYTE wePart2[12];
WORD weReserved2;
BYTE wePart3[4];
}WINENTRY;
// This is the format of the contents of the deTime field in the direntry
// structure.
// We don't use bitfields because we don't know how compilers for
// arbitrary machines will lay them out.
#define DT_2SECONDS_MASK 0x1F // seconds divided by 2
#define DT_2SECONDS_SHIFT 0
#define DT_MINUTES_MASK 0x7E0 // minutes
#define DT_MINUTES_SHIFT 5
#define DT_HOURS_MASK 0xF800 // hours
#define DT_HOURS_SHIFT 11
// This is the format of the contents of the deDate field in the direntry
// structure.
#define DD_DAY_MASK 0x1F // day of month
#define DD_DAY_SHIFT 0
#define DD_MONTH_MASK 0x1E0 // month
#define DD_MONTH_SHIFT 5
#define DD_YEAR_MASK 0xFE00 // year - 1980
#define DD_YEAR_SHIFT 9
typedef __packed struct
{
WORD Date;
WORD Time;
BYTE TimeTenth;
}FatDateTime;
//
//FAT16 Apis
//
typedef __packed struct
{
BYTE Attr;
BYTE CrtTimeTenth;
WORD CrtTime;
WORD CrtDate;
WORD LstAccDate;
WORD WrtTime;
WORD WrtDate;
DWORD FileSize;
}_STAT;
typedef __packed struct
{
int valid; // 1 valid, 0 free.
DWORD DirSectorNum;
int DirIndex;
DWORD StartSectorNum;
DWORD CurrentSectorNum;
DWORD SectorOffset;
DIRENTRY dir;
unsigned long offset;
}_FILE;
typedef __packed struct
{
DWORD DirSectorNum;
int DirIndex;
int IsRootDir;
char filename[13];
}FatGet;
// Prototypes
int fat_format(unsigned char Media,unsigned char Sizeofdisk_M,unsigned char FilesysType);
unsigned char fatInit(void);
void fat16_Nandflash_test(void);
int fat_mkdir( const char *dirname );
int fat_rmdir( const char *dirname );
int fat_getfirst(const char *path, char* filename);
int fat_getnext(char* filename);
int fat_close(int handle);
int fat_creat(const char* filename, BYTE attribute);
long fat_lseek(int handle, long offset, int origin);
int fat_open(const char* filename);
unsigned int fat_read(int handle, void* buffer, unsigned int bytes);
unsigned int fat_write(int handle, const char* buffer, unsigned int bytes);
int fat_remove( const char *filename);
int fat_get_stat( const char *filename, _STAT *stat);
int fat_set_stat( const char *filename, _STAT *stat);
int fat_rename( const char *oldname, const char *newname );
#endif⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -