?? sync.html
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<title>FatFs - f_sync</title>
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<div class="para">
<h2>f_sync</h2>
<p>The f_sync flushes the cached information of the wriiting file.</p>
<pre>
FRESULT f_sync (
FIL* <em>FileObject</em> // Pointer to the file object structure
);
</pre>
</div>
<div class="para">
<h4>Parameters</h4>
<dl class="par">
<dt>FileObject</dt>
<dd>Pointer to the file object to be flushed.</dd>
</dl>
</div>
<div class="para">
<h4>Return Values</h4>
<dl class="ret">
<dt>FR_OK (0)</dt>
<dd>The function succeeded.</dd>
<dt>FR_RW_ERROR</dt>
<dd>Any error occured in low level disk I/O.</dd>
<dt>FR_INCORRECT_DISK_CHANGE</dt>
<dd>Incorrect disk removal, such as a medium change during any file is opend, has been occured.</dd>
<dt>FR_NOT_ENABLED</dt>
<dd>FatFs module has not been enabled.</dd>
</dl>
</div>
<div class="para">
<h4>Description</h4>
<p>The f_sync() writes back the cached information of the file being written. This performs the same function as f_close() but the file is left opened and can continue file read/write operations to the file. This is suitable for applications that open files for a long time in writing mode, such as data logger. Performing f_sync() of periodic or immediataly after f_write() can minimize risk of data loss due to sudden blackout or unintentional disk removal. This function is not supported in read-only configuration.</p>
</div>
<div class="para">
<h4>References</h4>
<p><tt><a href="close.html">f_close</a></tt></p>
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<p class="foot"><a href="../00index_e.html">Return</a></p>
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