1e6865dcdSopenharmony_ci<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> 2e6865dcdSopenharmony_ci<html lang="en"> 3e6865dcdSopenharmony_ci<head> 4e6865dcdSopenharmony_ci<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 5e6865dcdSopenharmony_ci<meta http-equiv="Content-Style-Type" content="text/css"> 6e6865dcdSopenharmony_ci<link rel="up" title="FatFs" href="../00index_e.html"> 7e6865dcdSopenharmony_ci<link rel="alternate" hreflang="ja" title="Japanese" href="../ja/chdrive.html"> 8e6865dcdSopenharmony_ci<link rel="stylesheet" href="../css_e.css" type="text/css" media="screen" title="ELM Default"> 9e6865dcdSopenharmony_ci<title>FatFs - f_chdrive</title> 10e6865dcdSopenharmony_ci</head> 11e6865dcdSopenharmony_ci 12e6865dcdSopenharmony_ci<body> 13e6865dcdSopenharmony_ci 14e6865dcdSopenharmony_ci<div class="para func"> 15e6865dcdSopenharmony_ci<h2>f_chdrive</h2> 16e6865dcdSopenharmony_ci<p>The f_chdrive function changes the current drive.</p> 17e6865dcdSopenharmony_ci<pre> 18e6865dcdSopenharmony_ciFRESULT f_chdrive ( 19e6865dcdSopenharmony_ci const TCHAR* <span class="arg">path</span> <span class="c">/* [IN] Logical drive number */</span> 20e6865dcdSopenharmony_ci); 21e6865dcdSopenharmony_ci</pre> 22e6865dcdSopenharmony_ci</div> 23e6865dcdSopenharmony_ci 24e6865dcdSopenharmony_ci<div class="para arg"> 25e6865dcdSopenharmony_ci<h4>Parameters</h4> 26e6865dcdSopenharmony_ci<dl class="par"> 27e6865dcdSopenharmony_ci<dt>path</dt> 28e6865dcdSopenharmony_ci<dd>Specifies the <a href="filename.html">logical drive number</a> to be set as the current drive.</dd> 29e6865dcdSopenharmony_ci</dl> 30e6865dcdSopenharmony_ci</div> 31e6865dcdSopenharmony_ci 32e6865dcdSopenharmony_ci 33e6865dcdSopenharmony_ci<div class="para ret"> 34e6865dcdSopenharmony_ci<h4>Return Values</h4> 35e6865dcdSopenharmony_ci<p> 36e6865dcdSopenharmony_ci<a href="rc.html#ok">FR_OK</a>, 37e6865dcdSopenharmony_ci<a href="rc.html#id">FR_INVALID_DRIVE</a> 38e6865dcdSopenharmony_ci</p> 39e6865dcdSopenharmony_ci</div> 40e6865dcdSopenharmony_ci 41e6865dcdSopenharmony_ci 42e6865dcdSopenharmony_ci<div class="para desc"> 43e6865dcdSopenharmony_ci<h4>Description</h4> 44e6865dcdSopenharmony_ci<p>The <tt>f_chdrive</tt> function changes only the current drive. The initial value of the current drive number is 0. In Unix style drive prefix configuration, this function will not be needed because <tt>f_chdir</tt> function changes also the current drive. Note that the current drive is retained in a static variable, so that it also affects other tasks that using the file functions.</p> 45e6865dcdSopenharmony_ci</div> 46e6865dcdSopenharmony_ci 47e6865dcdSopenharmony_ci<div class="para comp"> 48e6865dcdSopenharmony_ci<h4>QuickInfo</h4> 49e6865dcdSopenharmony_ci<p>Available when <tt><a href="config.html#fs_rpath">FF_FS_RPATH</a> >= 1</tt>.</p> 50e6865dcdSopenharmony_ci</div> 51e6865dcdSopenharmony_ci 52e6865dcdSopenharmony_ci 53e6865dcdSopenharmony_ci<div class="para use"> 54e6865dcdSopenharmony_ci<h4>Example</h4> 55e6865dcdSopenharmony_ci<pre> 56e6865dcdSopenharmony_ci <em>f_chdrive</em>("2:"); <span class="c">/* Set drive 2 as current drive */</span> 57e6865dcdSopenharmony_ci 58e6865dcdSopenharmony_ci <em>f_chdrive</em>(""); <span class="c">/* No effect (set current drive as current drive) */</span> 59e6865dcdSopenharmony_ci</pre> 60e6865dcdSopenharmony_ci</div> 61e6865dcdSopenharmony_ci 62e6865dcdSopenharmony_ci 63e6865dcdSopenharmony_ci<div class="para ref"> 64e6865dcdSopenharmony_ci<h4>See Also</h4> 65e6865dcdSopenharmony_ci<p><tt><a href="chdir.html">f_chdir</a>, <a href="getcwd.html">f_getcwd</a></tt></p> 66e6865dcdSopenharmony_ci</div> 67e6865dcdSopenharmony_ci 68e6865dcdSopenharmony_ci<p class="foot"><a href="../00index_e.html">Return</a></p> 69e6865dcdSopenharmony_ci</body> 70e6865dcdSopenharmony_ci</html> 71