59 lines
2.3 KiB
HTML
59 lines
2.3 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="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 the FatFs modlue and it is allocated by an application program. There is no members 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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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 (always 0 in FAT32)
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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 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 winsect; // Current sector# appearing in the win[]
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BYTE win[512]; // Disk access window for directory and 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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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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DWORD winsect; // Current sector# appearing in the win[]
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BYTE win[512]; // Disk access window for directory, FAT and 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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</html>
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