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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [Common/] [FileSystem/] [FatFs-0.7e/] [doc/] [ja/] [sfatfs.html] - Rev 606
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<h2>FATFS</h2>
<p><tt>FATFS</tt>構造体は、個々の論理ドライブのダイナミック・ワーク・エリアを保持し、f_mount()でFatFsモジュールに登録されます。標準状態では次のようなメンバになっています。アプリケーションから書き換え可能なメンバはありません。</p>
<pre>
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
HANDLE h_mutex; /* Handle to the mutex (Platform dependent) */
#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
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;
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