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 | |
| 70702af1 | 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, or any data on the FAT volume can be collapsed.</p>\r |
| 53668523 L |
17 | <pre>\r |
| 18 | <span class="k">typedef</span> <span class="k">struct</span> {\r | |
| 70702af1 | 19 | BYTE fs_type; <span class="c">/* File system type (0, FS_FAT12, FS_FAT16, FS_FAT32 or FS_EXFAT) */</span>\r |
| 53668523 | 20 | BYTE drv; <span class="c">/* Physical drive number */</span>\r |
| 53668523 L |
21 | BYTE n_fats; <span class="c">/* Number of FAT copies (1,2) */</span>\r |
| 22 | BYTE wflag; <span class="c">/* win[] flag (b0:win[] is dirty) */</span>\r | |
| 23 | BYTE fsi_flag; <span class="c">/* FSINFO flags (b7:Disabled, b0:Dirty) */</span>\r | |
| 24 | WORD id; <span class="c">/* File system mount ID */</span>\r | |
| 25 | WORD n_rootdir; <span class="c">/* Number of root directory entries (FAT12/16) */</span>\r | |
| 70702af1 | 26 | WORD csize; <span class="c">/* Sectors per cluster */</span>\r |
| 53668523 L |
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 | |
| 70702af1 L |
30 | <span class="k">#if _FS_EXFAT</span>\r |
| 31 | BYTE* dirbuf; <span class="c">/* Directory entry block scratchpad buffer */</span>\r | |
| 32 | <span class="k">#endif</span>\r | |
| 53668523 L |
33 | <span class="k">#if</span> _FS_REENTRANT\r |
| 34 | _SYNC_t sobj; <span class="c">/* Identifier of sync object */</span>\r | |
| 35 | <span class="k">#endif</span>\r | |
| 36 | <span class="k">#if</span> !_FS_READONLY\r | |
| 70702af1 L |
37 | DWORD last_clust; <span class="c">/* FSINFO: Last allocated cluster (0xFFFFFFFF if invalid) */</span>\r |
| 38 | DWORD free_clust; <span class="c">/* FSINFO: Number of free clusters (0xFFFFFFFF if invalid) */</span>\r | |
| 53668523 L |
39 | <span class="k">#endif</span>\r |
| 40 | <span class="k">#if</span> _FS_RPATH\r | |
| 70702af1 L |
41 | DWORD cdir; <span class="c">/* Cluster number of current directory (0:root) */</span>\r |
| 42 | <span class="k">#if _FS_EXFAT</span>\r | |
| 43 | DWORD cdc_scl; <span class="c">/* Containing directory start cluster (invalid when cdir is 0) */</span>\r | |
| 44 | DWORD cdc_size; <span class="c">/* b31-b8:Size of containing directory, b7-b0: Chain status */</span>\r | |
| 45 | DWORD cdc_ofs; <span class="c">/* Offset in the containing directory (invalid when cdir is 0) */</span>\r | |
| 46 | <span class="k">#endif</span>\r | |
| 53668523 | 47 | <span class="k">#endif</span>\r |
| 70702af1 | 48 | DWORD n_fatent; <span class="c">/* Number of FAT entries (Number of clusters + 2) */</span>\r |
| 53668523 | 49 | DWORD fsize; <span class="c">/* Sectors per FAT */</span>\r |
| 70702af1 L |
50 | DWORD volbase; <span class="c">/* Volume base LBA */</span>\r |
| 51 | DWORD fatbase; <span class="c">/* FAT base LBA */</span>\r | |
| 52 | DWORD dirbase; <span class="c">/* Root directory base (LBA|Cluster) */</span>\r | |
| 53 | DWORD database; <span class="c">/* Data base LBA */</span>\r | |
| 54 | DWORD winsect; <span class="c">/* Sector LBA appearing in the win[] */</span>\r | |
| 53668523 L |
55 | BYTE win[_MAX_SS]; <span class="c">/* Disk access window for directory, FAT (and file data at tiny cfg) */</span>\r |
| 56 | } FATFS;\r | |
| 57 | </pre>\r | |
| 58 | </div>\r | |
| 59 | \r | |
| 60 | <p class="foot"><a href="../00index_e.html">Return</a></p>\r | |
| 61 | </body>\r | |
| 62 | </html>\r |