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Add FreeRTOS-Plus directory.

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Richard Barry 2012-08-11 21:34:11 +00:00
parent 7bd5f21ad5
commit f508a5f653
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FreeRTOS/Demo/Common/FileSystem/FatFs-0.7e/doc/en/dread.html Normal file
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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 - disk_read</title>
</head>
<body>
<div class="para">
<h2>disk_read</h2>
<p>The disk_read function reads sector(s) from the disk drive.</p>
<pre>
DRESULT disk_read (
BYTE <em>Drive</em>, /* Physical drive number */
BYTE* <em>Buffer</em>, /* Pointer to the read data buffer */
DWORD <em>SectorNumber</em>, /* Start sector number */
BYTE <em>SectorCount</em> /* Number of sectros to read */
);
</pre>
</div>
<div class="para">
<h4>Parameters</h4>
<dl class="par">
<dt>Drive</dt>
<dd>Specifies the physical drive number.</dd>
<dt>Buffer</dt>
<dd>Pointer to the byte array to store the read data. The buffer size of number of bytes to be read, sector size * sector count, is required. The memory address specified by upper layer may or may not be aligned to word boundary.</dd>
<dt>SectorNumber</dt>
<dd>Specifies the start sector number in logical block address (LBA).</dd>
<dt>SectorCount</dt>
<dd>Specifies number of sectors to read. The value can be 1 to 255.</dd>
</dl>
</div>
<div class="para">
<h4>Return Value</h4>
<dl class="ret">
<dt>RES_OK (0)</dt>
<dd>The function succeeded.</dd>
<dt>RES_ERROR</dt>
<dd>Any hard error occured during the read operation and could not recover it.</dd>
<dt>RES_PARERR</dt>
<dd>Invalid parameter.</dd>
<dt>RES_NOTRDY</dt>
<dd>The disk drive has not been initialized.</dd>
</dl>
</div>
<p class="foot"><a href="../00index_e.html">Return</a></p>
</body>
</html>