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<title>FatFs - disk_write</title> | |
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<div class="para"> | |
<h2>disk_write</h2> | |
<p>The disk_write writes sector(s) to the disk.</p> | |
<pre> | |
DRESULT disk_write ( | |
BYTE <em>Drive</em>, <span class="c">/* Physical drive number */</span> | |
const BYTE* <em>Buffer</em>, <span class="c">/* Pointer to the write data (may be non aligned) */</span> | |
DWORD <em>SectorNumber</em>, <span class="c">/* Sector number to write */</span> | |
BYTE <em>SectorCount</em> <span class="c">/* Number of sectors to write */</span> | |
); | |
</pre> | |
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<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 <em>byte array</em> to be written. Note that the specified memory address is not that always aligned to word boundary. If the hardware does not support misaligned data transfer, it must be solved in this function.</dd> | |
<dt>SectorNumber</dt> | |
<dd>Specifies the start sector number in logical block address (LBA).</dd> | |
<dt>SectorCount</dt> | |
<dd>Specifies the number of sectors to write. The value can be 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> | |
</dl> | |
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<div class="para"> | |
<h4>Return Values</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 write operation and could not recover it.</dd> | |
<dt>RES_WRPRT</dt> | |
<dd>The medium is write protected.</dd> | |
<dt>RES_PARERR</dt> | |
<dd>Invalid parameter.</dd> | |
<dt>RES_NOTRDY</dt> | |
<dd>The disk drive has not been initialized.</dd> | |
</dl> | |
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<div class="para"> | |
<h4>Description</h4> | |
<p>This function is not required in read only configuration.</p> | |
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<p class="foot"><a href="../00index_e.html">Return</a></p> | |
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