text: /*---------------------------------------------------------------------------/
  /  FatFs - FAT file system module include file  R0.08b    (C)ChaN, 2011
  /----------------------------------------------------------------------------/
  / FatFs module is a generic FAT file system module for small embedded systems.
  / This is a free software that opened for education, research and commercial
  / developments under license policy of following trems.
  /
  /  Copyright (C) 2011, ChaN, all right reserved.
  /
  / * The 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 product UNDER YOUR RESPONSIBILITY.
  / * Redistributions of source code must retain the above copyright notice.
  /
  /----------------------------------------------------------------------------*/
  
  #ifndef _FATFS
  #define _FATFS	8237	/* Revision ID */
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  #include <rtthread.h>
  #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 */
  #define LD2PD(vol) (VolToPart[vol].pd)	/* Get physical drive# */
  #define LD2PT(vol) (VolToPart[vol].pt)	/* Get partition# */
  typedef struct {
  	BYTE pd;	/* Physical drive# */
  	BYTE pt;	/* Partition # (0-3) */
  } PARTITION;
  extern const PARTITION VolToPart[];	/* Volume - Physical location resolution table */
  
  #else						/* Single partition configuration */
  #define LD2PD(vol) (vol)	/* Logical drive# is bound to the same physical drive# */
  #define LD2PT(vol) 0		/* Always mounts the 1st partition */
  
  #endif
  
  
  
  /* Type of path name strings on FatFs API */
  
  #if _LFN_UNICODE			/* Unicode string */
  #if !_USE_LFN
  #error _LFN_UNICODE must be 0 in 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 {
  	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 (1,2) */
  	BYTE	wflag;			/* win[] dirty flag (1:must be written back) */
  	BYTE	fsi_flag;		/* fsinfo dirty flag (1:must be written back) */
  	WORD	id;				/* File system mount ID */
  	WORD	n_rootdir;		/* Number of root directory entries (FAT12/16) */
  	WORD	ssize;			/* Bytes per sector (512,1024,2048,4096) */
  #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 */
  	DWORD	fsi_sector;		/* fsinfo sector (FAT32) */
  #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	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[] */
  	BYTE	win[_MAX_SS];	/* Disk access window for Directory, FAT (and Data on tiny cfg) */
  } FATFS;
  
  
  
  /* File object structure (FIL) */
  
  typedef struct {
  	FATFS*	fs;				/* Pointer to the owner file system object */
  	WORD	id;				/* Owner file system mount ID */
  	BYTE	flag;			/* File status flags */
  	BYTE	pad1;
  	DWORD	fptr;			/* File read/write pointer (0 on file open) */
  	DWORD	fsize;			/* File size */
  	DWORD	sclust;			/* File start cluster (0 when fsize==0) */
  	DWORD	clust;			/* Current cluster */
  	DWORD	dsect;			/* Current data sector */
  #if !_FS_READONLY
  	DWORD	dir_sect;		/* Sector containing the directory entry */
  	BYTE*	dir_ptr;		/* Ponter to the directory entry in the window */
  #endif
  #if _USE_FASTSEEK
  	DWORD*	cltbl;			/* Pointer to the cluster link map table (null on file open) */
  #endif
  #if _FS_SHARE
  	UINT	lockid;			/* File lock ID (index of file semaphore table) */
  #endif
  #if !_FS_TINY
  	BYTE	buf[_MAX_SS];	/* File data read/write buffer */
  #endif
  } FIL;
  
  
  
  /* Directory object structure (DIR) */
  
  typedef struct {
  	FATFS*	fs;				/* Pointer to the owner file system object */
  	WORD	id;				/* Owner file system mount ID */
  	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 _USE_LFN
  	WCHAR*	lfn;			/* Pointer to the LFN working buffer */
  	WORD	lfn_idx;		/* Last matched LFN index number (0xFFFF:No LFN) */
  #endif
  } DIR;
  
  
  
  /* File status 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 occured 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) Acces denied due to prohibited access or directory full */
  	FR_EXIST,				/* (8) Acces 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 on the physical drive */
  	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 shareing 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 */
  } FRESULT;
  
  
  
  /*--------------------------------------------------------------*/
  /* FatFs module application interface                           */
  
  FRESULT f_mount (BYTE, FATFS*);						/* Mount/Unmount a logical drive */
  FRESULT f_open (FIL*, const TCHAR*, BYTE);			/* Open or create a file */
  FRESULT f_read (FIL*, void*, UINT, UINT*);			/* Read data from a file */
  FRESULT f_lseek (FIL*, DWORD);						/* Move file pointer of a file object */
  FRESULT f_close (FIL*);								/* Close an open file object */
  FRESULT f_opendir (DIR*, const TCHAR*);				/* Open an existing directory */
  FRESULT f_readdir (DIR*, FILINFO*);					/* Read a directory item */
  FRESULT f_seekdir(DIR *dj, int offset);				/* Seek in directory */
  FRESULT f_stat (const TCHAR*, FILINFO*);			/* Get file status */
  FRESULT f_write (FIL*, const void*, UINT, UINT*);	/* Write data to a file */
  FRESULT f_getfree (const TCHAR*, DWORD*, FATFS**);	/* Get number of free clusters on the drive */
  FRESULT f_truncate (FIL*);							/* Truncate file */
  FRESULT f_sync (FIL*);								/* Flush cached data of a writing file */
  FRESULT f_unlink (const TCHAR*);					/* Delete an existing file or directory */
  FRESULT	f_mkdir (const TCHAR*);						/* Create a new directory */
  FRESULT f_chmod (const TCHAR*, BYTE, BYTE);			/* Change attriburte of the file/dir */
  FRESULT f_utime (const TCHAR*, const FILINFO*);		/* Change timestamp of the file/dir */
  FRESULT f_rename (const TCHAR*, const TCHAR*);		/* Rename/Move a file or directory */
  FRESULT f_forward (FIL*, UINT(*)(const BYTE*,UINT), UINT, UINT*);	/* Forward data to the stream */
  FRESULT f_mkfs (BYTE, BYTE, UINT);					/* Create a file system on the drive */
  FRESULT f_chdrive (BYTE);							/* Change current drive */
  FRESULT f_chdir (const TCHAR*);						/* Change current directory */
  FRESULT f_getcwd (TCHAR*, UINT);					/* Get current directory */
  int f_putc (TCHAR, FIL*);							/* Put a character to the file */
  int f_puts (const TCHAR*, FIL*);					/* Put a string to the file */
  int f_printf (FIL*, const TCHAR*, ...);				/* Put a formatted string to the file */
  TCHAR* f_gets (TCHAR*, int, FIL*);					/* Get a string from the file */
  
  #ifndef EOF
  #define EOF (-1)
  #endif
  
  #define f_eof(fp) (((fp)->fptr == (fp)->fsize) ? 1 : 0)
  #define f_error(fp) (((fp)->flag & FA__ERROR) ? 1 : 0)
  #define f_tell(fp) ((fp)->fptr)
  #define f_size(fp) ((fp)->fsize)
  
  
  
  
  /*--------------------------------------------------------------*/
  /* Additional user defined functions                            */
  
  /* RTC function */
  #if !_FS_READONLY
  DWORD get_fattime (void);
  #endif
  
  /* Unicode support functions */
  #if _USE_LFN						/* Unicode - OEM code conversion */
  WCHAR ff_convert (WCHAR, UINT);		/* OEM-Unicode bidirectional conversion */
  WCHAR ff_wtoupper (WCHAR);			/* Unicode upper-case conversion */
  #if _USE_LFN == 3					/* Memory functions */
  void* ff_memalloc (UINT);			/* Allocate memory block */
  void ff_memfree (void*);			/* Free memory block */
  #endif
  #endif
  
  /* Sync functions */
  #if _FS_REENTRANT
  int ff_cre_syncobj (BYTE, _SYNC_t*);/* Create a sync object */
  int ff_req_grant (_SYNC_t);			/* Lock sync object */
  void ff_rel_grant (_SYNC_t);		/* Unlock sync object */
  int ff_del_syncobj (_SYNC_t);		/* 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
  #define FA__ERROR			0x80
  
  #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 function */
  #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 */
  