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jeremybenn |
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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="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 _FATFS_ {
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BYTE fs_type; /* FAT sub type */
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BYTE drive; /* Physical drive number */
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BYTE csize; /* Number of sectors per cluster */
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BYTE n_fats; /* Number of FAT copies */
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BYTE wflag; /* win[] dirty flag (1:must be written back) */
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BYTE fsi_flag; /* fsinfo dirty flag (1:must be written back) */
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WORD id; /* File system mount ID */
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WORD n_rootdir; /* Number of root directory entries (0 on FAT32) */
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#if _FS_REENTRANT
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_SYNC_t sobj; /* Identifier of sync object */
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#endif
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#if _MAX_SS != 512
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WORD s_size; /* Sector size */
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#endif
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#if !_FS_READONLY
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DWORD last_clust; /* Last allocated cluster */
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DWORD free_clust; /* Number of free clusters */
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DWORD fsi_sector; /* fsinfo sector */
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#endif
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#if _FS_RPATH
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DWORD cdir; /* Current directory (0:root)*/
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#endif
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DWORD sects_fat; /* Sectors per fat */
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DWORD max_clust; /* Maximum cluster# + 1. Number of clusters is max_clust - 2 */
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DWORD fatbase; /* FAT start sector */
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DWORD dirbase; /* Root directory start sector (Cluster# on FAT32) */
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DWORD database; /* Data start sector */
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DWORD winsect; /* Current sector appearing in the win[] */
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BYTE win[_MAX_SS];/* Disk access window for Directory/FAT */
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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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</body>
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</html>
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