You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
238 lines
7.4 KiB
238 lines
7.4 KiB
/*---------------------------------------------------------------------------/
|
|
/ Petit FatFs - FAT file system module include file R0.01a (C)ChaN, 2009
|
|
/----------------------------------------------------------------------------/
|
|
/ Petit FatFs module is an open source software to implement FAT file system to
|
|
/ small embedded systems. This is a free software and is opened for education,
|
|
/ research and commercial developments under license policy of following trems.
|
|
/
|
|
/ Copyright (C) 2009, ChaN, all right reserved.
|
|
/
|
|
/ * The Petit FatFs module is a free software and there is NO WARRANTY.
|
|
/ * No restriction on use. You can use, modify and redistribute it for
|
|
/ personal, non-profit or commercial use UNDER YOUR RESPONSIBILITY.
|
|
/ * Redistributions of source code must retain the above copyright notice.
|
|
/----------------------------------------------------------------------------*/
|
|
|
|
#include "integer.h"
|
|
|
|
/*---------------------------------------------------------------------------/
|
|
/ Petit FatFs Configuration Options
|
|
/
|
|
/ CAUTION! Do not forget to make clean the project after any changes to
|
|
/ the configuration options.
|
|
/
|
|
/----------------------------------------------------------------------------*/
|
|
#ifndef _FATFS
|
|
#define _FATFS
|
|
|
|
#define _WORD_ACCESS 0
|
|
/* The _WORD_ACCESS option defines which access method is used to the word
|
|
/ data in the FAT structure.
|
|
/
|
|
/ 0: Byte-by-byte access. Always compatible with all platforms.
|
|
/ 1: Word access. Do not choose this unless following condition is met.
|
|
/
|
|
/ When the byte order on the memory is big-endian or address miss-aligned
|
|
/ word access results incorrect behavior, the _WORD_ACCESS must be set to 0.
|
|
/ If it is not the case, the value can also be set to 1 to improve the
|
|
/ performance and code efficiency. */
|
|
|
|
|
|
#define _USE_DIR 0
|
|
/* To enable pf_opendir and pf_readdir function, set _USE_DIR to 1. */
|
|
|
|
|
|
#define _USE_LSEEK 0
|
|
/* To enable pf_lseek function, set _USE_LSEEK to 1. */
|
|
|
|
|
|
#define _FS_FAT32 1
|
|
/* To enable FAT32 support, set _FS_FAT32 to 1. */
|
|
|
|
|
|
/* End of configuration options. Do not change followings without care. */
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
|
|
#if _FS_FAT32
|
|
#define CLUST DWORD
|
|
#else
|
|
#define CLUST WORD
|
|
#endif
|
|
|
|
|
|
/* File system object structure */
|
|
|
|
typedef struct _FATFS_ {
|
|
BYTE fs_type; /* FAT sub type */
|
|
BYTE csize; /* Number of sectors per cluster */
|
|
BYTE flag; /* File status flags */
|
|
BYTE csect; /* File sector address in the cluster */
|
|
WORD n_rootdir; /* Number of root directory entries (0 on FAT32) */
|
|
BYTE* buf; /* Pointer to the disk access buffer */
|
|
CLUST max_clust; /* Maximum cluster# + 1. Number of clusters is max_clust - 2 */
|
|
DWORD fatbase; /* FAT start sector */
|
|
DWORD dirbase; /* Root directory start sector (Cluster# on FAT32) */
|
|
DWORD database; /* Data start sector */
|
|
DWORD fptr; /* File R/W pointer */
|
|
DWORD fsize; /* File size */
|
|
CLUST org_clust; /* File start cluster */
|
|
CLUST curr_clust; /* File current cluster */
|
|
DWORD dsect; /* File current data sector */
|
|
} FATFS;
|
|
|
|
|
|
|
|
/* Directory object structure */
|
|
|
|
typedef struct _DIR_ {
|
|
WORD index; /* Current read/write index number */
|
|
BYTE* fn; /* Pointer to the SFN (in/out) {file[8],ext[3],status[1]} */
|
|
CLUST sclust; /* Table start cluster (0:Static table) */
|
|
CLUST clust; /* Current cluster */
|
|
DWORD sect; /* Current sector */
|
|
} DIR;
|
|
|
|
|
|
|
|
/* File status structure */
|
|
|
|
typedef struct _FILINFO_ {
|
|
DWORD fsize; /* File size */
|
|
WORD fdate; /* Last modified date */
|
|
WORD ftime; /* Last modified time */
|
|
BYTE fattrib; /* Attribute */
|
|
char fname[13]; /* File name */
|
|
} FILINFO;
|
|
|
|
|
|
|
|
/* File function return code (FRESULT) */
|
|
|
|
typedef enum {
|
|
FR_OK = 0, /* 0 */
|
|
FR_DISK_ERR, /* 1 */
|
|
FR_NOT_READY, /* 2 */
|
|
FR_NO_FILE, /* 3 */
|
|
FR_NO_PATH, /* 4 */
|
|
FR_INVALID_NAME, /* 5 */
|
|
FR_STREAM_ERR, /* 6 */
|
|
FR_INVALID_OBJECT, /* 7 */
|
|
FR_NOT_ENABLED, /* 8 */
|
|
FR_NO_FILESYSTEM /* 9 */
|
|
} FRESULT;
|
|
|
|
|
|
|
|
/*--------------------------------------------------------------*/
|
|
/* Petit FatFs module application interface */
|
|
|
|
FRESULT pf_mount (FATFS*); /* Mount/Unmount a logical drive */
|
|
FRESULT pf_open (const char*); /* Open a file */
|
|
FRESULT pf_read (void*, WORD, WORD*); /* Read data from a file */
|
|
FRESULT pf_lseek (DWORD); /* Move file pointer of a file object */
|
|
FRESULT pf_opendir (DIR*, const char*); /* Open an existing directory */
|
|
FRESULT pf_readdir (DIR*, FILINFO*); /* Read a directory item */
|
|
|
|
|
|
|
|
/*--------------------------------------------------------------*/
|
|
/* Flags and offset address */
|
|
|
|
/* File status flag (FATFS.flag) */
|
|
|
|
#define FA_READ 0x01
|
|
#define FA_STREAM 0x40
|
|
#define FA__ERROR 0x80
|
|
|
|
|
|
/* FAT sub type (FATFS.fs_type) */
|
|
|
|
#define FS_FAT12 1
|
|
#define FS_FAT16 2
|
|
#define FS_FAT32 3
|
|
|
|
|
|
/* File attribute bits for directory entry */
|
|
|
|
#define AM_RDO 0x01 /* Read only */
|
|
#define AM_HID 0x02 /* Hidden */
|
|
#define AM_SYS 0x04 /* System */
|
|
#define AM_VOL 0x08 /* Volume label */
|
|
#define AM_LFN 0x0F /* LFN entry */
|
|
#define AM_DIR 0x10 /* Directory */
|
|
#define AM_ARC 0x20 /* Archive */
|
|
#define AM_MASK 0x3F /* Mask of defined bits */
|
|
|
|
|
|
/* FatFs refers the members in the FAT structures with byte offset instead
|
|
/ of structure member because there are incompatibility of the packing option
|
|
/ between various compilers. */
|
|
|
|
#define BS_jmpBoot 0
|
|
#define BS_OEMName 3
|
|
#define BPB_BytsPerSec 11
|
|
#define BPB_SecPerClus 13
|
|
#define BPB_RsvdSecCnt 14
|
|
#define BPB_NumFATs 16
|
|
#define BPB_RootEntCnt 17
|
|
#define BPB_TotSec16 19
|
|
#define BPB_Media 21
|
|
#define BPB_FATSz16 22
|
|
#define BPB_SecPerTrk 24
|
|
#define BPB_NumHeads 26
|
|
#define BPB_HiddSec 28
|
|
#define BPB_TotSec32 32
|
|
#define BS_55AA 510
|
|
|
|
#define BS_DrvNum 36
|
|
#define BS_BootSig 38
|
|
#define BS_VolID 39
|
|
#define BS_VolLab 43
|
|
#define BS_FilSysType 54
|
|
|
|
#define BPB_FATSz32 36
|
|
#define BPB_ExtFlags 40
|
|
#define BPB_FSVer 42
|
|
#define BPB_RootClus 44
|
|
#define BPB_FSInfo 48
|
|
#define BPB_BkBootSec 50
|
|
#define BS_DrvNum32 64
|
|
#define BS_BootSig32 66
|
|
#define BS_VolID32 67
|
|
#define BS_VolLab32 71
|
|
#define BS_FilSysType32 82
|
|
|
|
#define MBR_Table 446
|
|
|
|
#define DIR_Name 0
|
|
#define DIR_Attr 11
|
|
#define DIR_NTres 12
|
|
#define DIR_CrtTime 14
|
|
#define DIR_CrtDate 16
|
|
#define DIR_FstClusHI 20
|
|
#define DIR_WrtTime 22
|
|
#define DIR_WrtDate 24
|
|
#define DIR_FstClusLO 26
|
|
#define DIR_FileSize 28
|
|
|
|
|
|
|
|
/*--------------------------------*/
|
|
/* Multi-byte word access macros */
|
|
|
|
#if _WORD_ACCESS == 1 /* Enable word access to the FAT structure */
|
|
#define LD_WORD(ptr) (WORD)(*(WORD*)(BYTE*)(ptr))
|
|
#define LD_DWORD(ptr) (DWORD)(*(DWORD*)(BYTE*)(ptr))
|
|
#define ST_WORD(ptr,val) *(WORD*)(BYTE*)(ptr)=(WORD)(val)
|
|
#define ST_DWORD(ptr,val) *(DWORD*)(BYTE*)(ptr)=(DWORD)(val)
|
|
#else /* Use byte-by-byte access to the FAT structure */
|
|
#define LD_WORD(ptr) (WORD)(((WORD)*(BYTE*)((ptr)+1)<<8)|(WORD)*(BYTE*)(ptr))
|
|
#define LD_DWORD(ptr) (DWORD)(((DWORD)*(BYTE*)((ptr)+3)<<24)|((DWORD)*(BYTE*)((ptr)+2)<<16)|((WORD)*(BYTE*)((ptr)+1)<<8)|*(BYTE*)(ptr))
|
|
#define ST_WORD(ptr,val) *(BYTE*)(ptr)=(BYTE)(val); *(BYTE*)((ptr)+1)=(BYTE)((WORD)(val)>>8)
|
|
#define ST_DWORD(ptr,val) *(BYTE*)(ptr)=(BYTE)(val); *(BYTE*)((ptr)+1)=(BYTE)((WORD)(val)>>8); *(BYTE*)((ptr)+2)=(BYTE)((DWORD)(val)>>16); *(BYTE*)((ptr)+3)=(BYTE)((DWORD)(val)>>24)
|
|
#endif
|
|
|
|
|
|
#endif /* _FATFS */
|