40 lines
2 KiB
HTML
40 lines
2 KiB
HTML
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<!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="Petit FatFs" href="../00index_p.html">
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<link rel="stylesheet" href="../css_e.css" type="text/css" media="screen" title="ELM Default">
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<link rel="stylesheet" href="../css_p.css" type="text/css" media="screen" title="ELM Default">
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<title>Petit 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 logical drive and a file. It is given by application program and registerd/unregisterd to the Petit FatFs module with pf_mount function. There is no member that can be changed by application programs.</p>
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<pre>
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typedef struct {
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BYTE fs_type; <span class="c">/* FAT sub type */</span>
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BYTE csize; <span class="c">/* Number of sectors per cluster */</span>
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BYTE flag; <span class="c">/* File status flags */</span>
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BYTE pad1;
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WORD n_rootdir; <span class="c">/* Number of root directory entries (0 on FAT32) */</span>
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CLUST n_fatent; <span class="c">/* Number of FAT entries (= number of clusters + 2) */</span>
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DWORD fatbase; <span class="c">/* FAT start sector */</span>
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DWORD dirbase; <span class="c">/* Root directory start sector (Cluster# on FAT32) */</span>
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DWORD database; <span class="c">/* Data start sector */</span>
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DWORD fptr; <span class="c">/* File read/write pointer */</span>
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DWORD fsize; <span class="c">/* File size */</span>
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CLUST org_clust; <span class="c">/* File start cluster */</span>
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CLUST curr_clust; <span class="c">/* File current cluster */</span>
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DWORD dsect; <span class="c">/* File current data sector */</span>
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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_p.html">Return</a></p>
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</body>
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</html>
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