opendir.html

来自「非常好用的嵌入式系统用的fat文件系统,支持fat12 fat16 fat32」· HTML 代码 · 共 74 行

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<!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="FatFs" href="../00index_e.html">
<link rel="stylesheet" href="../css_e.css" type="text/css" media="screen" title="ELM Default">
<title>FatFs - f_opendir</title>
</head>

<body>

<div class="para">
<h2>f_opendir</h2>
<p>The f_opendir function opens a directory.</p>
<pre>
FRESULT f_opendir (
  DIR* <em>DirObject</em>,      /* Pointer to the blank directory object structure */
  const char* <em>DirName</em>  /* Pointer to the directory name */
);
</pre>
</div>

<div class="para">
<h4>Parameter</h4>
<dl class="par">
<dt>DirObject</dt>
<dd>Pointer to the blank directory object to be created.</dd>
<dt>DirName</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 directory.</dd>
<dt>FR_NO_PATH</dt>
<dd>Could not find the path.</dd>
<dt>FR_INVALID_NAME</dt>
<dd>The path name is invalid.</dd>
<dt>FR_INVALID_DRIVE</dt>
<dd>The drive number is invalid.</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_RW_ERROR</dt>
<dd>The function failed due to a disk error or an internal error.</dd>
<dt>FR_NOT_ENABLED</dt>
<dd>The logical drive has no work area.</dd>
<dt>FR_NO_FILESYSTEM</dt>
<dd>There is no valid FAT partition on the disk.</dd>
</dl>
</div>


<div class="para">
<h4>Description</h4>
<p>The f_opendir 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. This function is not supported in minimization level of &gt;=2.</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_e.html">Return</a></p>
</body>
</html>

opendir.html - 源码说明

本页面展示了「非常好用的嵌入式系统用的fat文件系统,支持fat12 fat16 fat32」中的 opendir.html 源码文件，采用 HTML 编程语言编写，共 74 行代码。您可以在线阅读完整代码内容，也可以返回资源详情页下载完整源码包进行本地学习和开发。

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