74 lines
2.6 KiB
HTML
74 lines
2.6 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="up" title="FatFs" href="../00index_e.html">
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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 - f_opendir</title>
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</head>
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<body>
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<div class="para">
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<h2>f_opendir</h2>
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<p>The f_opendir opens a directory.</p>
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<pre>
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FRESULT f_opendir (
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DIR* <em>DirObject</em>, // Pointer to blank directory object structure
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const char* <em>DirName</em> // Pointer to the directory name
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);
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</pre>
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</div>
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<div class="para">
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<h4>Parameter</h4>
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<dl class="par">
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<dt>DirObject</dt>
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<dd>Pointer to the blank directory object to be initialized</dd>
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<dt>DirName</dt>
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<dd>Pinter to the null-terminated string that specifies the full-path directory name to be opened. The directory separator is <tt>'/'</tt>. Because the FatFs module does not have a concept of current directory, a full-path name that followed from the root directory must be used. Leading space charactors are skipped if exist and heading <tt>'/'</tt> can be exist or omitted. The target directory name cannot be followed by a <tt>'/'</tt>. When open the root directory, specify <tt>""</tt> or <tt>"/"</tt>.</dd>
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</dl>
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</div>
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<div class="para">
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<h4>Return Values</h4>
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<dl class="ret">
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<dt>FR_OK (0)</dt>
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<dd>The function succeeded. The <tt><em>DirObject</em></tt> structure is used for subsequent calls to read the directory entries.</dd>
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<dt>FR_NO_FILE</dt>
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<dd>Could not find the directory.</dd>
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<dt>FR_NO_PATH</dt>
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<dd>Could not find the path.</dd>
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<dt>FR_INVALID_NAME</dt>
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<dd>The path name is invalid.</dd>
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<dt>FR_NOT_READY</dt>
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<dd>The disk drive cannot work due to no medium in the drive or any other reason.</dd>
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<dt>FR_RW_ERROR</dt>
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<dd>Any error occured in low level disk I/O.</dd>
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<dt>FR_INCORRECT_DISK_CHANGE</dt>
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<dd>Incorrect disk removal/change has occured.</dd>
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<dt>FR_NOT_ENABLED</dt>
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<dd>FatFs module is not enabled.</dd>
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<dt>FR_NO_FILESYSTEM</dt>
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<dd>There is no valid FAT partition on the disk.</dd>
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</dl>
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</div>
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<div class="para">
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<h4>Description</h4>
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<p>The f_opendir opens a directory and initializes the <tt><em>DirObject</em></tt> structure for subsequent calls. The directory object structure can be discarded at any time. This function is not supported in minimization level 2.</p>
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</div>
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<div class="para">
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<h4>References</h4>
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<p><tt><a href="readdir.html">f_readdir</a>, <a href="sdir.html">DIR</a></tt></p>
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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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