69 lines
2.6 KiB
HTML
69 lines
2.6 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
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<html lang="en">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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<meta http-equiv="Content-Style-Type" content="text/css">
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<link rel="up" title="FatFs" href="../00index_e.html">
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<link rel="alternate" hreflang="ja" title="Japanese" href="../ja/dwrite.html">
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<link rel="stylesheet" href="../css_e.css" type="text/css" media="screen" title="ELM Default">
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<title>FatFs - disk_write</title>
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</head>
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<body>
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<div class="para func">
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<h2>disk_write</h2>
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<p>The disk_write writes sector(s) to the disk.</p>
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<pre>
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DRESULT disk_write (
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BYTE <span class="arg">drv</span>, <span class="c">/* [IN] Physical drive number */</span>
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const BYTE* <span class="arg">buff</span>, <span class="c">/* [IN] Write data (may be non aligned) */</span>
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DWORD <span class="arg">sector</span>, <span class="c">/* [IN] Sector number to write */</span>
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UINT <span class="arg">count</span> <span class="c">/* [IN] Number of sectors to write */</span>
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);
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</pre>
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</div>
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<div class="para arg">
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<h4>Parameters</h4>
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<dl class="par">
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<dt>pdrv</dt>
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<dd>Specifies the physical drive number.</dd>
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<dt>buff</dt>
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<dd>Pointer to the <em>byte array</em> to be written.</dd>
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<dt>sector</dt>
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<dd>Specifies the start sector number in logical block address (LBA).</dd>
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<dt>count</dt>
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<dd>Specifies the number of sectors to write. FatFs specifis 1 to 128. Generally, a multiple sector transfer request must not be split into single sector transactions to the device, or you will never get good write performance.</dd>
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</dl>
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</div>
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<div class="para ret">
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<h4>Return Values</h4>
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<dl class="ret">
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<dt>RES_OK (0)</dt>
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<dd>The function succeeded.</dd>
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<dt>RES_ERROR</dt>
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<dd>Any hard error occured during the write operation and could not recover it.</dd>
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<dt>RES_WRPRT</dt>
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<dd>The medium is write protected.</dd>
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<dt>RES_PARERR</dt>
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<dd>Invalid parameter.</dd>
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<dt>RES_NOTRDY</dt>
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<dd>The disk drive has not been initialized.</dd>
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</dl>
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</div>
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<div class="para desc">
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<h4>Description</h4>
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<p>This function is not required in read only configuration. The specified memory address is not that always aligned to word boundary because the type of pointer is defined as <tt>BYTE</tt>. For more information, read <a href="dread.html">description in disk_read function</a>.</p>
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<p><em>Application program MUST NOT call this function while FatFs is in use, or FAT structure on the volume can be corrapted.</em></p>
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</div>
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<p class="foot"><a href="../00index_e.html">Return</a></p>
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</body>
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</html>
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