savelij13
8e92305484
- Supported multiple partitions on a plysical drive. (FatFs) - Fixed an endian sensitive code in f_mkfs(). (FatFs) - Added a capability of extending the file size to f_lseek(). - Added minimization level 3. - Fixed a problem that can collapse a sector when recreate an - existing file in any sub-directory at non FAT32 cfg. (Tiny-FatFs)
62 lines
2.7 KiB
HTML
62 lines
2.7 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
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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. There is no member that can be changed from the application program.</p>
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<h4>FatFs</h4>
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<pre>
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typedef struct _FATFS {
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WORD id; /* File system mount ID */
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WORD n_rootdir; /* Number of root directory entries */
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DWORD winsect; /* Current sector appearing in the win[] */
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DWORD sects_fat; /* Sectors per fat */
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DWORD max_clust; /* Maximum cluster# + 1 */
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DWORD fatbase; /* FAT start sector */
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DWORD dirbase; /* Root directory start sector (cluster# for FAT32) */
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DWORD database; /* Data start sector */
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DWORD last_clust; /* Last allocated cluster */
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BYTE fs_type; /* FAT type (0:Not mounted) */
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BYTE sects_clust; /* Sectors per cluster */
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BYTE n_fats; /* Number of FAT copies */
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BYTE drive; /* Physical drive number */
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BYTE winflag; /* win[] dirty flag (1:must be written back) */
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BYTE pad1;
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BYTE win[512]; /* Disk access window for Directory/FAT */
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} FATFS;
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</pre>
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<h4>Tiny-FatFs</h4>
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<pre>
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typedef struct _FATFS {
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WORD id; /* File system mount ID */
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WORD n_rootdir; /* Number of root directory entries */
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DWORD winsect; /* Current sector appearing in the win[] */
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DWORD fatbase; /* FAT start sector */
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DWORD dirbase; /* Root directory start sector */
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DWORD database; /* Data start sector */
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CLUST sects_fat; /* Sectors per fat */
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CLUST max_clust; /* Maximum cluster# + 1 */
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CLUST last_clust; /* Last allocated cluster */
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BYTE fs_type; /* FAT type (0:Not mounted) */
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BYTE sects_clust; /* Sectors per cluster */
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BYTE n_fats; /* Number of FAT copies */
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BYTE winflag; /* win[] dirty flag (1:must be written back) */
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BYTE win[512]; /* Disk access window for Directory/FAT/File */
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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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