73 lines
2.3 KiB
HTML
73 lines
2.3 KiB
HTML
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
|
||
|
|
<html lang="en">
|
||
|
|
<head>
|
||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
|
||
|
|
<meta http-equiv="Content-Style-Type" content="text/css">
|
||
|
|
<link rel="up" title="Petit FatFs" href="../00index_p.html">
|
||
|
|
<link rel="stylesheet" href="../css_e.css" type="text/css" media="screen" title="ELM Default">
|
||
|
|
<link rel="stylesheet" href="../css_p.css" type="text/css" media="screen" title="ELM Default">
|
||
|
|
<title>Petit FatFs - pf_opendir</title>
|
||
|
|
</head>
|
||
|
|
|
||
|
|
<body>
|
||
|
|
|
||
|
|
<div class="para">
|
||
|
|
<h2>pf_opendir</h2>
|
||
|
|
<p>The pf_opendir function opens a directory.</p>
|
||
|
|
<pre>
|
||
|
|
FRESULT pf_opendir (
|
||
|
|
DIR* <span class="arg">dp</span>, <span class="c">/* [OUT] Pointer to the blank directory object structure */</span>
|
||
|
|
const char* <span class="arg">path</span> <span class="c">/* [IN] Pointer to the directory name */</span>
|
||
|
|
);
|
||
|
|
</pre>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<div class="para">
|
||
|
|
<h4>Parameters</h4>
|
||
|
|
<dl class="par">
|
||
|
|
<dt>dp</dt>
|
||
|
|
<dd>Pointer to the blank directory object to be created.</dd>
|
||
|
|
<dt>path</dt>
|
||
|
|
<dd>Pinter to the null-terminated string that specifies the <a href="filename.html">directory name</a> to be opened.</dd>
|
||
|
|
</dl>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
|
||
|
|
<div class="para">
|
||
|
|
<h4>Return Values</h4>
|
||
|
|
<dl class="ret">
|
||
|
|
<dt>FR_OK (0)</dt>
|
||
|
|
<dd>The function succeeded and the directory object is created. It is used for subsequent calls to read the directory entries.</dd>
|
||
|
|
<dt>FR_NO_FILE</dt>
|
||
|
|
<dd>Could not find the path.</dd>
|
||
|
|
<dt>FR_NOT_READY</dt>
|
||
|
|
<dd>The disk drive cannot work due to no medium in the drive or any other reason.</dd>
|
||
|
|
<dt>FR_DISK_ERR</dt>
|
||
|
|
<dd>The function failed due to a hard error in the disk function, a wrong FAT structure or an internal error.</dd>
|
||
|
|
<dt>FR_NOT_ENABLED</dt>
|
||
|
|
<dd>The volume has no work area.</dd>
|
||
|
|
</dl>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
|
||
|
|
<div class="para">
|
||
|
|
<h4>Description</h4>
|
||
|
|
<p>The <tt>pf_opendir()</tt> function opens an exsisting directory and creates the directory object for subsequent calls. The directory object structure can be discarded at any time without any procedure.</p>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
|
||
|
|
<div class="para">
|
||
|
|
<h4>QuickInfo</h4>
|
||
|
|
<p>Available when <tt>_USE_DIR == 1</tt>.</p>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
|
||
|
|
<div class="para">
|
||
|
|
<h4>References</h4>
|
||
|
|
<p><tt><a href="readdir.html">f_readdir</a>, <a href="sdir.html">DIR</a></tt></p>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<p class="foot"><a href="../00index_p.html">Return</a></p>
|
||
|
|
</body>
|
||
|
|
</html>
|