ff.h

STM32摄像头程序

#elif _CODE_PAGE == 1	/* ASCII (for only non-LFN cfg) */
#define _DF1S	0

#else
#error Unknown code page

#endif



/* Character code support macros */

#define IsUpper(c)	(((c)>='A')&&((c)<='Z'))
#define IsLower(c)	(((c)>='a')&&((c)<='z'))

#if _DF1S		/* DBCS configuration */

#ifdef _DF2S	/* Two 1st byte areas */
#define IsDBCS1(c)	(((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E))
#else			/* One 1st byte area */
#define IsDBCS1(c)	((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E)
#endif

#ifdef _DS3S	/* Three 2nd byte areas */
#define IsDBCS2(c)	(((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E))
#else			/* Two 2nd byte areas */
#define IsDBCS2(c)	(((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E))
#endif

#else			/* SBCS configuration */

#define IsDBCS1(c)	0
#define IsDBCS2(c)	0

#endif /* _DF1S */



/* Definitions corresponds to multi partition */

#if _MULTI_PARTITION		/* Multiple partition configuration */

typedef struct _PARTITION {
	BYTE pd;	/* Physical drive# */
	BYTE pt;	/* Partition # (0-3) */
} PARTITION;

extern
const PARTITION Drives[];			/* Logical drive# to physical location conversion table */
#define LD2PD(drv) (Drives[drv].pd)	/* Get physical drive# */
#define LD2PT(drv) (Drives[drv].pt)	/* Get partition# */

#else						/* Single partition configuration */

#define LD2PD(drv) (drv)	/* Physical drive# is equal to the logical drive# */
#define LD2PT(drv) 0		/* Always mounts the 1st partition */

#endif



/* Definitions corresponds to multiple sector size */

#if _MAX_SS == 512		/* Single sector size */
#define	SS(fs)	512U

#elif _MAX_SS == 1024 || _MAX_SS == 2048 || _MAX_SS == 4096	/* Multiple sector size */
#define	SS(fs)	((fs)->s_size)

#else
#error Sector size must be 512, 1024, 2048 or 4096.

#endif



/* Type of file name on FatFs API */

#if _LFN_UNICODE && _USE_LFN
typedef WCHAR XCHAR;	/* Unicode */
#else
typedef char XCHAR;		/* SBCS, DBCS */
#endif



/* File system object structure */

typedef struct _FATFS_ {
	BYTE	fs_type;	/* FAT sub type */
	BYTE	drive;		/* Physical drive number */
	BYTE	csize;		/* Number of sectors per cluster */
	BYTE	n_fats;		/* Number of FAT copies */
	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 (0 on FAT32) */
#if _FS_REENTRANT
	_SYNC_t	sobj;		/* Identifier of sync object */
#endif
#if _MAX_SS != 512
	WORD	s_size;		/* Sector size */
#endif
#if !_FS_READONLY
	DWORD	last_clust;	/* Last allocated cluster */
	DWORD	free_clust;	/* Number of free clusters */
	DWORD	fsi_sector;	/* fsinfo sector */
#endif
#if _FS_RPATH
	DWORD	cdir;		/* Current directory (0:root)*/
#endif
	DWORD	sects_fat;	/* Sectors per fat */
	DWORD	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	winsect;	/* Current sector appearing in the win[] */
	BYTE	win[_MAX_SS];/* Disk access window for Directory/FAT */
} FATFS;



/* Directory object structure */

typedef struct _DIR_ {
	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:Static table) */
	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 object structure */

typedef struct _FIL_ {
	FATFS*	fs;			/* Pointer to the owner file system object */
	WORD	id;			/* Owner file system mount ID */
	BYTE	flag;		/* File status flags */
	BYTE	csect;		/* Sector address in the cluster */
	DWORD	fptr;		/* File R/W pointer */
	DWORD	fsize;		/* File size */
	DWORD	org_clust;	/* File start cluster */
	DWORD	curr_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 !_FS_TINY
	BYTE	buf[_MAX_SS];/* File R/W buffer */
#endif
} FIL;



/* 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];	/* Short file name (8.3 format) */
#if _USE_LFN
	XCHAR*	lfname;		/* Pointer to the LFN buffer */
	int 	lfsize;		/* Size of LFN buffer [chrs] */
#endif
} FILINFO;



/* File function return code (FRESULT) */

typedef enum {
	FR_OK = 0,			/* 0 */
	FR_DISK_ERR,		/* 1 */
	FR_INT_ERR,			/* 2 */
	FR_NOT_READY,		/* 3 */
	FR_NO_FILE,			/* 4 */
	FR_NO_PATH,			/* 5 */
	FR_INVALID_NAME,	/* 6 */
	FR_DENIED,			/* 7 */
	FR_EXIST,			/* 8 */
	FR_INVALID_OBJECT,	/* 9 */
	FR_WRITE_PROTECTED,	/* 10 */
	FR_INVALID_DRIVE,	/* 11 */
	FR_NOT_ENABLED,		/* 12 */
	FR_NO_FILESYSTEM,	/* 13 */
	FR_MKFS_ABORTED,	/* 14 */
	FR_TIMEOUT			/* 15 */
} FRESULT;



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

FRESULT f_mount (BYTE, FATFS*);						/* Mount/Unmount a logical drive */
FRESULT f_open (FIL*, const XCHAR*, BYTE);			/* Open or create a file */
FRESULT f_read (FIL*, void*, UINT, UINT*);			/* Read data from a file */
FRESULT f_write (FIL*, const void*, UINT, UINT*);	/* Write data to a file */
FRESULT f_lseek (FIL*, DWORD);						/* Move file pointer of a file object */