savelij13
46155916b1
- Added a memory configuration option. (_USE_LFN) - Added file lock feature. (_FS_SHARE) - Added fast seek feature. (_USE_FASTSEEK) - Changed some types on the API, XCHAR->TCHAR. - Changed fname member in the FILINFO structure on Unicode cfg. - String functions support UTF-8 encoding files on Unicode cfg.
55 lines
2.6 KiB
HTML
55 lines
2.6 KiB
HTML
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<html lang="en">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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<meta http-equiv="Content-Style-Type" content="text/css">
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<link rel="up" title="FatFs" href="../00index_e.html">
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<link rel="alternate" hreflang="ja" title="Japanese" href="../ja/sfatfs.html">
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<link rel="stylesheet" href="../css_e.css" type="text/css" media="screen" title="ELM Default">
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<title>FatFs - FATFS</title>
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</head>
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<body>
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<div class="para">
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<h2>FATFS</h2>
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<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>
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<pre>
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typedef struct {
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BYTE fs_type; <span>/* FAT sub-type (0:Not mounted) */</span>
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BYTE drv; <span>/* Physical drive number */</span>
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BYTE csize; <span>/* Sectors per cluster (1,2,4...128) */</span>
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BYTE n_fats; <span>/* Number of FAT copies (1,2) */</span>
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BYTE wflag; <span>/* win[] dirty flag */</span>
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BYTE fsi_flag; <span>/* fsinfo dirty flag */</span>
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WORD id; <span>/* File system mount ID */</span>
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WORD n_rootdir; <span>/* Number of root directory entries (FAT12/16) */</span>
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#if _MAX_SS != 512
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WORD ssize; <span>/* Sector size (512,1024,2048,4096) */</span>
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#endif
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#if _FS_REENTRANT
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_SYNC_t sobj; <span>/* Identifier of sync object */</span>
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#endif
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#if !_FS_READONLY
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DWORD last_clust; <span>/* Last allocated cluster */</span>
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DWORD free_clust; <span>/* Number of free clusters */</span>
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DWORD fsi_sector; <span>/* fsinfo sector (FAT32) */</span>
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#endif
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#if _FS_RPATH
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DWORD cdir; <span>/* Current directory cluster (0:root) */</span>
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#endif
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DWORD n_fatent; <span>/* Number of FAT entries (= number of clusters + 2) */</span>
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DWORD fsize; <span>/* Sectors per FAT */</span>
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DWORD fatbase; <span>/* FAT area start sector */</span>
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DWORD dirbase; <span>/* Root directory area start sector (FAT32: cluster#) */</span>
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DWORD database; <span>/* Data area start sector */</span>
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DWORD winsect; <span>/* Current sector appearing in the win[] */</span>
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BYTE win[_MAX_SS]; <span>/* Disk access window for Directory, FAT (and Data on tiny cfg) */</span>
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} FATFS;
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</pre>
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</div>
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<p class="foot"><a href="../00index_e.html">Return</a></p>
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