projects / z180-stamp.git / blame
| Commit | Line | Data |
|---|---|---|
| 53668523 L |
1 | <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">\r |
| 2 | <html lang="en">\r | |
| 3 | <head>\r | |
| 4 | <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">\r | |
| 5 | <meta http-equiv="Content-Style-Type" content="text/css">\r | |
| 6 | <link rel="up" title="FatFs" href="../00index_e.html">\r | |
| 7 | <link rel="alternate" hreflang="ja" title="Japanese" href="../ja/sfatfs.html">\r | |
| 8 | <link rel="stylesheet" href="../css_e.css" type="text/css" media="screen" title="ELM Default">\r | |
| 9 | <title>FatFs - FATFS</title>\r | |
| 10 | </head>\r | |
| 11 | \r | |
| 12 | <body>\r | |
| 13 | \r | |
| 14 | <div class="para">\r | |
| 15 | <h2>FATFS</h2>\r | |
| 16 | <p>The <tt>FATFS</tt> structure (file system object) holds dynamic work area of individual logical drives. It is given by application program and registerd/unregisterd to the FatFs module with <tt>f_mount()</tt> function. Initialization is done on first API call after <tt>f_mount()</tt> function or media change. Application program must not modify any member in this structure.</p>\r | |
| 17 | <pre>\r | |
| 18 | <span class="k">typedef</span> <span class="k">struct</span> {\r | |
| 19 | BYTE fs_type; <span class="c">/* FAT sub-type (0:Not mounted) */</span>\r | |
| 20 | BYTE drv; <span class="c">/* Physical drive number */</span>\r | |
| 21 | BYTE csize; <span class="c">/* Sectors per cluster (1,2,4,...,128) */</span>\r | |
| 22 | BYTE n_fats; <span class="c">/* Number of FAT copies (1,2) */</span>\r | |
| 23 | BYTE wflag; <span class="c">/* win[] flag (b0:win[] is dirty) */</span>\r | |
| 24 | BYTE fsi_flag; <span class="c">/* FSINFO flags (b7:Disabled, b0:Dirty) */</span>\r | |
| 25 | WORD id; <span class="c">/* File system mount ID */</span>\r | |
| 26 | WORD n_rootdir; <span class="c">/* Number of root directory entries (FAT12/16) */</span>\r | |
| 27 | <span class="k">#if</span> _MAX_SS != _MIN_SS\r | |
| 28 | WORD ssize; <span class="c">/* Sector size (512,1024,2048 or 4096) */</span>\r | |
| 29 | <span class="k">#endif</span>\r | |
| 30 | <span class="k">#if</span> _FS_REENTRANT\r | |
| 31 | _SYNC_t sobj; <span class="c">/* Identifier of sync object */</span>\r | |
| 32 | <span class="k">#endif</span>\r | |
| 33 | <span class="k">#if</span> !_FS_READONLY\r | |
| 34 | DWORD last_clust; <span class="c">/* FSINFO: Last allocated cluster */</span>\r | |
| 35 | DWORD free_clust; <span class="c">/* FSINFO: Number of free clusters */</span>\r | |
| 36 | <span class="k">#endif</span>\r | |
| 37 | <span class="k">#if</span> _FS_RPATH\r | |
| 38 | DWORD cdir; <span class="c">/* Current directory start cluster (0:root) */</span>\r | |
| 39 | <span class="k">#endif</span>\r | |
| 40 | DWORD n_fatent; <span class="c">/* Number of FAT entries (== Number of clusters + 2) */</span>\r | |
| 41 | DWORD fsize; <span class="c">/* Sectors per FAT */</span>\r | |
| 42 | DWORD volbase; <span class="c">/* Volume start sector */</span>\r | |
| 43 | DWORD fatbase; <span class="c">/* FAT area start sector */</span>\r | |
| 44 | DWORD dirbase; <span class="c">/* Root directory area start sector (FAT32: Cluster#) */</span>\r | |
| 45 | DWORD database; <span class="c">/* Data area start sector */</span>\r | |
| 46 | DWORD winsect; <span class="c">/* Current sector appearing in the win[] */</span>\r | |
| 47 | BYTE win[_MAX_SS]; <span class="c">/* Disk access window for directory, FAT (and file data at tiny cfg) */</span>\r | |
| 48 | } FATFS;\r | |
| 49 | </pre>\r | |
| 50 | </div>\r | |
| 51 | \r | |
| 52 | <p class="foot"><a href="../00index_e.html">Return</a></p>\r | |
| 53 | </body>\r | |
| 54 | </html>\r |