savelij13
f76dc3a97f
- Improved cluster scan algolithm to write files fast. - Fixed f_mkdir() creates incorrect directory on FAT32.
62 lines
2.5 KiB
HTML
62 lines
2.5 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="ja">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=Shift_JIS">
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<meta http-equiv="Content-Style-Type" content="text/css">
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<link rel="up" title="FatFs" href="../00index_j.html">
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<link rel="stylesheet" href="../css_j.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><tt>FATFS</tt>構造体は、FatFsモジュールのダイナミックワークエリアを保持し、アプリケーション側で確保・管理されます。アプリケーションから変更可能なメンバはありません。</p>
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<h4>FatFs</h4>
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<pre>
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typedef struct _FATFS {
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BYTE fs_type; /* FAT type */
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BYTE files; /* Number of files currently opend */
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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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WORD n_rootdir; /* Number of root directory entry */
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BYTE winflag; /* win[] dirty flag (1:must be written back) */
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BYTE pad1;
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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 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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BYTE fs_type; /* FAT type */
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BYTE files; /* Number of files currently opend */
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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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WORD n_rootdir; /* Number of root directory entry */
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BYTE winflag; /* win[] dirty flag (1:must be written back) */
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BYTE pad1;
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DWORD winsect; /* Current sector appearing in the win[] */
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WORD sects_fat; /* Sectors per fat */
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WORD max_clust; /* Maximum cluster# + 1 */
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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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WORD last_clust; /* Last allocated cluster */
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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_j.html">戻る</a></p>
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</body>
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