ff.h

Go to the documentation of this file.

/*---------------------------------------------------------------------------/
/  FatFs - FAT file system module include R0.11     (C)ChaN, 2015
/----------------------------------------------------------------------------/
/ FatFs module is a free software that opened under license policy of
/ following conditions.
/
/ Copyright (C) 2015, ChaN, all right reserved.
/
/ 1. Redistributions of source code must retain the above copyright notice,
/    this condition and the following disclaimer.
/
/ This software is provided by the copyright holder and contributors "AS IS"
/ and any warranties related to this software are DISCLAIMED.
/ The copyright owner or contributors be NOT LIABLE for any damages caused
/ by use of this software.
/---------------------------------------------------------------------------*/


#ifndef _FATFS
#define _FATFS  32020   /* Revision ID */

#ifdef __cplusplus
extern "C" {
#endif

#include "integer.h"    /* Basic integer types */
#include "ffconf.h"     /* FatFs configuration options */
#if _FATFS != _FFCONF
#error Wrong configuration file (ffconf.h).
#endif



/* Definitions of volume management */

#if _MULTI_PARTITION        /* Multiple partition configuration */
typedef struct {
    BYTE pd;    /* Physical drive number */
    BYTE pt;    /* Partition: 0:Auto detect, 1-4:Forced partition) */
} PARTITION;
extern PARTITION VolToPart[];   /* Volume - Partition resolution table */
#define LD2PD(vol) (VolToPart[vol].pd)  /* Get physical drive number */
#define LD2PT(vol) (VolToPart[vol].pt)  /* Get partition index */

#else                           /* Single partition configuration */
#define LD2PD(vol) (BYTE)(vol)  /* Each logical drive is bound to the same physical drive number */
#define LD2PT(vol) 0            /* Find first valid partition or in SFD */

#endif



/* Type of path name strings on FatFs API */

#if _LFN_UNICODE            /* Unicode string */
#if !_USE_LFN
#error _LFN_UNICODE must be 0 at non-LFN cfg.
#endif
#ifndef _INC_TCHAR
typedef WCHAR TCHAR;
#define _T(x) L ## x
#define _TEXT(x) L ## x
#endif

#else                       /* ANSI/OEM string */
#ifndef _INC_TCHAR
typedef char TCHAR;
#define _T(x) x
#define _TEXT(x) x
#endif

#endif



/* File system object structure (FATFS) */

typedef struct {
  union{
    UINT    d32[_MAX_SS/4]; /* Force 32bits alignement */     
    BYTE    d8[_MAX_SS];    /* Disk access window for Directory, FAT (and file data at tiny cfg) */  
  }win;
    BYTE    fs_type;        /* FAT sub-type (0:Not mounted) */
    BYTE    drv;            /* Physical drive number */
    BYTE    csize;          /* Sectors per cluster (1,2,4...128) */
    BYTE    n_fats;         /* Number of FAT copies (1 or 2) */
    BYTE    wflag;          /* win[] flag (b0:dirty) */
    BYTE    fsi_flag;       /* FSINFO flags (b7:disabled, b0:dirty) */
    WORD    id;             /* File system mount ID */
    WORD    n_rootdir;      /* Number of root directory entries (FAT12/16) */
#if _MAX_SS != _MIN_SS
    WORD    ssize;          /* Bytes per sector (512, 1024, 2048 or 4096) */
#endif
#if _FS_REENTRANT
    _SYNC_t sobj;           /* Identifier of sync object */
#endif
#if !_FS_READONLY
    DWORD   last_clust;     /* Last allocated cluster */
    DWORD   free_clust;     /* Number of free clusters */
#endif
#if _FS_RPATH
    DWORD   cdir;           /* Current directory start cluster (0:root) */
#endif
    DWORD   n_fatent;       /* Number of FAT entries, = number of clusters + 2 */
    DWORD   fsize;          /* Sectors per FAT */
    DWORD   volbase;        /* Volume start sector */
    DWORD   fatbase;        /* FAT start sector */
    DWORD   dirbase;        /* Root directory start sector (FAT32:Cluster#) */
    DWORD   database;       /* Data start sector */
    DWORD   winsect;        /* Current sector appearing in the win[] */
    
} FATFS;



/* File object structure (FIL) */

typedef struct {
#if !_FS_TINY
  union{  
    UINT    d32[_MAX_SS/4]; /* Force 32bits alignement */     
    BYTE    d8[_MAX_SS];    /* File data read/write buffer */
  }buf;
#endif
    FATFS*  fs;             /* Pointer to the related file system object (**do not change order**) */
    WORD    id;             /* Owner file system mount ID (**do not change order**) */
    BYTE    flag;           /* Status flags */
    BYTE    err;            /* Abort flag (error code) */
    DWORD   fptr;           /* File read/write pointer (Zeroed on file open) */
    DWORD   fsize;          /* File size */
    DWORD   sclust;         /* File start cluster (0:no cluster chain, always 0 when fsize is 0) */
    DWORD   clust;          /* Current cluster of fpter (not valid when fprt is 0) */
    DWORD   dsect;          /* Sector number appearing in buf[] (0:invalid) */
#if !_FS_READONLY
    DWORD   dir_sect;       /* Sector number containing the directory entry */
    BYTE*   dir_ptr;        /* Pointer to the directory entry in the win[] */
#endif
#if _USE_FASTSEEK
    DWORD*  cltbl;          /* Pointer to the cluster link map table (Nulled on file open) */
#endif
#if _FS_LOCK
    UINT    lockid;         /* File lock ID origin from 1 (index of file semaphore table Files[]) */
#endif

} FIL;



/* Directory object structure (DIR) */

typedef struct {
#if !_FS_TINY
  union{  
            UINT     d32[_MAX_SS/4];  /* Force 32bits alignement */  
            BYTE   d8[_MAX_SS];  /* File data read/write buffer */
  }buf;
#endif   
    FATFS*  fs;             /* Pointer to the owner file system object (**do not change order**) */
    WORD    id;             /* Owner file system mount ID (**do not change order**) */
    WORD    index;          /* Current read/write index number */
    DWORD   sclust;         /* Table start cluster (0:Root dir) */
    DWORD   clust;          /* Current cluster */
    DWORD   sect;           /* Current sector */
    BYTE*   dir;            /* Pointer to the current SFN entry in the win[] */
    BYTE*   fn;             /* Pointer to the SFN (in/out) {file[8],ext[3],status[1]} */
#if _FS_LOCK
    UINT    lockid;         /* File lock ID (index of file semaphore table Files[]) */
#endif
#if _USE_LFN
    WCHAR*  lfn;            /* Pointer to the LFN working buffer */
    WORD    lfn_idx;        /* Last matched LFN index number (0xFFFF:No LFN) */
#endif
#if _USE_FIND
    const TCHAR*    pat;    /* Pointer to the name matching pattern */
#endif
} DIR;



/* File information structure (FILINFO) */

typedef struct {
    DWORD   fsize;          /* File size */
    WORD    fdate;          /* Last modified date */
    WORD    ftime;          /* Last modified time */
    BYTE    fattrib;        /* Attribute */
    TCHAR   fname[13];      /* Short file name (8.3 format) */
#if _USE_LFN
    TCHAR*  lfname;         /* Pointer to the LFN buffer */
    UINT    lfsize;         /* Size of LFN buffer in TCHAR */
#endif
} FILINFO;



/* File function return code (FRESULT) */

typedef enum {
    FR_OK = 0,              /* (0) Succeeded */
    FR_DISK_ERR,            /* (1) A hard error occurred in the low level disk I/O layer */
    FR_INT_ERR,             /* (2) Assertion failed */
    FR_NOT_READY,           /* (3) The physical drive cannot work */
    FR_NO_FILE,             /* (4) Could not find the file */
    FR_NO_PATH,             /* (5) Could not find the path */
    FR_INVALID_NAME,        /* (6) The path name format is invalid */
    FR_DENIED,              /* (7) Access denied due to prohibited access or directory full */
    FR_EXIST,               /* (8) Access denied due to prohibited access */
    FR_INVALID_OBJECT,      /* (9) The file/directory object is invalid */
    FR_WRITE_PROTECTED,     /* (10) The physical drive is write protected */
    FR_INVALID_DRIVE,       /* (11) The logical drive number is invalid */
    FR_NOT_ENABLED,         /* (12) The volume has no work area */
    FR_NO_FILESYSTEM,       /* (13) There is no valid FAT volume */
    FR_MKFS_ABORTED,        /* (14) The f_mkfs() aborted due to any parameter error */
    FR_TIMEOUT,             /* (15) Could not get a grant to access the volume within defined period */
    FR_LOCKED,              /* (16) The operation is rejected according to the file sharing policy */
    FR_NOT_ENOUGH_CORE,     /* (17) LFN working buffer could not be allocated */
    FR_TOO_MANY_OPEN_FILES, /* (18) Number of open files > _FS_SHARE */
    FR_INVALID_PARAMETER    /* (19) Given parameter is invalid */
} FRESULT;



/*--------------------------------------------------------------*/
/* FatFs module application interface                           */

FRESULT f_open (FIL* fp, const TCHAR* path, BYTE mode);             /* Open or create a file */
FRESULT f_close (FIL* fp);                                          /* Close an open file object */
FRESULT f_read (FIL* fp, void* buff, UINT btr, UINT* br);           /* Read data from a file */
FRESULT f_write (FIL* fp, const void* buff, UINT btw, UINT* bw);    /* Write data to a file */
FRESULT f_forward (FIL* fp, UINT(*func)(const BYTE*,UINT), UINT btf, UINT* bf); /* Forward data to the stream */
FRESULT f_lseek (FIL* fp, DWORD ofs);                               /* Move file pointer of a file object */
FRESULT f_truncate (FIL* fp);                                       /* Truncate file */
FRESULT f_sync (FIL* fp);                                           /* Flush cached data of a writing file */
FRESULT f_opendir (DIR* dp, const TCHAR* path);                     /* Open a directory */
FRESULT f_closedir (DIR* dp);                                       /* Close an open directory */
FRESULT f_readdir (DIR* dp, FILINFO* fno);                          /* Read a directory item */
FRESULT f_findfirst (DIR* dp, FILINFO* fno, const TCHAR* path, const TCHAR* pattern);   /* Find first file */
FRESULT f_findnext (DIR* dp, FILINFO* fno);                         /* Find next file */
FRESULT f_mkdir (const TCHAR* path);                                /* Create a sub directory */
FRESULT f_unlink (const TCHAR* path);                               /* Delete an existing file or directory */
FRESULT f_rename (const TCHAR* path_old, const TCHAR* path_new);    /* Rename/Move a file or directory */
FRESULT f_stat (const TCHAR* path, FILINFO* fno);                   /* Get file status */
FRESULT f_chmod (const TCHAR* path, BYTE attr, BYTE mask);          /* Change attribute of the file/dir */
FRESULT f_utime (const TCHAR* path, const FILINFO* fno);            /* Change times-tamp of the file/dir */
FRESULT f_chdir (const TCHAR* path);                                /* Change current directory */
FRESULT f_chdrive (const TCHAR* path);                              /* Change current drive */
FRESULT f_getcwd (TCHAR* buff, UINT len);                           /* Get current directory */
FRESULT f_getfree (const TCHAR* path, DWORD* nclst, FATFS** fatfs); /* Get number of free clusters on the drive */
FRESULT f_getlabel (const TCHAR* path, TCHAR* label, DWORD* vsn);   /* Get volume label */
FRESULT f_setlabel (const TCHAR* label);                            /* Set volume label */
FRESULT f_mount (FATFS* fs, const TCHAR* path, BYTE opt);           /* Mount/Unmount a logical drive */
FRESULT f_mkfs (const TCHAR* path, BYTE sfd, UINT au);              /* Create a file system on the volume */
FRESULT f_fdisk (BYTE pdrv, const DWORD szt[], void* work);         /* Divide a physical drive into some partitions */
int f_putc (TCHAR c, FIL* fp);                                      /* Put a character to the file */
int f_puts (const TCHAR* str, FIL* cp);                             /* Put a string to the file */
int f_printf (FIL* fp, const TCHAR* str, ...);                      /* Put a formatted string to the file */
TCHAR* f_gets (TCHAR* buff, int len, FIL* fp);                      /* Get a string from the file */

#define f_eof(fp) ((int)((fp)->fptr == (fp)->fsize))
#define f_error(fp) ((fp)->err)
#define f_tell(fp) ((fp)->fptr)
#define f_size(fp) ((fp)->fsize)
#define f_rewind(fp) f_lseek((fp), 0)
#define f_rewinddir(dp) f_readdir((dp), 0)

#ifndef EOF
#define EOF (-1)
#endif




/*--------------------------------------------------------------*/
/* Additional user defined functions                            */

/* RTC function */
#if !_FS_READONLY && !_FS_NORTC
DWORD get_fattime (void);
#endif

/* Unicode support functions */
#if _USE_LFN                            /* Unicode - OEM code conversion */
WCHAR ff_convert (WCHAR chr, UINT dir); /* OEM-Unicode bidirectional conversion */
WCHAR ff_wtoupper (WCHAR chr);          /* Unicode upper-case conversion */
#if _USE_LFN == 3                       /* Memory functions */
void* ff_memalloc (UINT msize);         /* Allocate memory block */
void ff_memfree (void* mblock);         /* Free memory block */
#endif
#endif

/* Sync functions */
#if _FS_REENTRANT
int ff_cre_syncobj (BYTE vol, _SYNC_t* sobj);   /* Create a sync object */
int ff_req_grant (_SYNC_t sobj);                /* Lock sync object */
void ff_rel_grant (_SYNC_t sobj);               /* Unlock sync object */
int ff_del_syncobj (_SYNC_t sobj);              /* Delete a sync object */
#endif




/*--------------------------------------------------------------*/
/* Flags and offset address                                     */


/* File access control and file status flags (FIL.flag) */

#define FA_READ             0x01
#define FA_OPEN_EXISTING    0x00

#if !_FS_READONLY
#define FA_WRITE            0x02
#define FA_CREATE_NEW       0x04
#define FA_CREATE_ALWAYS    0x08
#define FA_OPEN_ALWAYS      0x10
#define FA__WRITTEN         0x20
#define FA__DIRTY           0x40
#endif


/* 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 */


/* Fast seek feature */
#define CREATE_LINKMAP  0xFFFFFFFF



/*--------------------------------*/
/* 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

#ifdef __cplusplus
}
#endif

#endif /* _FATFS */