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- <title>FatFs - FATFS</title>
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- <div class="para">
- <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>
- <h4>FatFs</h4>
- <pre>
- typedef struct _FATFS {
- WORD id; /* File system mount ID */
- WORD n_rootdir; /* Number of root directory entries */
- DWORD winsect; /* Current sector appearing in the win[] */
- DWORD sects_fat; /* Sectors per fat */
- DWORD max_clust; /* Maximum cluster# + 1 */
- DWORD fatbase; /* FAT start sector */
- DWORD dirbase; /* Root directory start sector (cluster# for FAT32) */
- DWORD database; /* Data start sector */
- DWORD last_clust; /* Last allocated cluster */
- DWORD free_clust; /* Number of free clusters */
- BYTE fs_type; /* FAT type (0:Not mounted) */
- BYTE csize; /* Sectors per cluster */
- BYTE n_fats; /* Number of FAT copies */
- BYTE drive; /* Physical drive number */
- BYTE winflag; /* win[] dirty flag (1:must be written back) */
- BYTE pad1;
- BYTE win[512]; /* Disk access window for Directory/FAT */
- } FATFS;
- </pre>
- <h4>Tiny-FatFs</h4>
- <pre>
- typedef struct _FATFS {
- WORD id; /* File system mount ID */
- WORD n_rootdir; /* Number of root directory entries */
- DWORD winsect; /* Current sector appearing in the win[] */
- DWORD fatbase; /* FAT start sector */
- DWORD dirbase; /* Root directory start sector */
- DWORD database; /* Data start sector */
- CLUST sects_fat; /* Sectors per fat */
- CLUST max_clust; /* Maximum cluster# + 1 */
- CLUST last_clust; /* Last allocated cluster */
- CLUST free_clust; /* Number of free clusters */
- BYTE fs_type; /* FAT type (0:Not mounted) */
- BYTE csize; /* Sectors per cluster */
- BYTE n_fats; /* Number of FAT copies */
- BYTE winflag; /* win[] dirty flag (1:must be written back) */
- BYTE win[512]; /* Disk access window for Directory/FAT/File */
- } FATFS;
- </pre>
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