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| <h2>FATFS</h2> | |
| <p>The <tt>FATFS</tt> structure holds dynamic work area of individual logical drives. It is given by application program and registerd/unregisterd to the FatFs module with f_mount function. Following members are in standard configuration. There is no member that can be changed from the application program.</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 | |
| _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; | |
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