1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> 2<html lang="en"> 3<head> 4<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 5<meta http-equiv="Content-Style-Type" content="text/css"> 6<link rel="stylesheet" href="../css_e.css" type="text/css" media="screen" title="ELM Default"> 7<title>FatFs - disk_status</title> 8</head> 9 10<body> 11 12<div class="para func"> 13<h2>disk_status</h2> 14<p>The disk_status function is called to inquire the current drive status.</p> 15<pre> 16DSTATUS disk_status ( 17 BYTE <span class="arg">pdrv</span> <span class="c">/* [IN] Physical drive number */</span> 18); 19</pre> 20</div> 21 22<div class="para arg"> 23<h4>Parameter</h4> 24<dl class="par"> 25<dt>pdrv</dt> 26<dd>Physical drive number to identify the target device. Always zero in single drive system.</dd> 27</dl> 28</div> 29 30 31<div class="para ret"> 32<h4>Return Values</h4> 33<p>The current drive status is returned in combination of status flags described below. FatFs refers only <tt>STA_NOINIT</tt> and <tt>STA_PROTECT</tt>.</p> 34<dl class="ret"> 35<dt>STA_NOINIT</dt> 36<dd>Indicates that the device has not been initialized and not ready to work. This flag is set on system reset, media removal or failure of <a href="dinit.html"><tt>disk_initialize</tt></a> function. It is cleared on <tt>disk_initialize</tt> function succeeded. Any media change that occurs asynchronously must be captured and reflect it to the status flags, or auto-mount function will not work correctly. If the system does not support media change detection, application program needs to explicitly re-mount the volume with <tt>f_mount</tt> function after each media change.</dd> 37<dt>STA_NODISK</dt> 38<dd>Indicates that no medium in the drive. This is always cleared when the drive is non-removable class. Note that FatFs does not refer this flag.</dd> 39<dt>STA_PROTECT</dt> 40<dd>Indicates that the medium is write protected. This is always cleared when the drive has no write protect function. Not valid if <tt>STA_NODISK</tt> is set.</dd> 41</dl> 42</div> 43 44 45<p class="foot"><a href="../00index_e.html">Return</a></p> 46</body> 47</html> 48