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https://bitbucket.org/librepilot/librepilot.git
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69 lines
2.2 KiB
HTML
69 lines
2.2 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="stylesheet" href="../css_e.css" type="text/css" media="screen" title="ELM Default">
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<title>FatFs - f_sync</title>
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</head>
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<body>
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<div class="para">
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<h2>f_sync</h2>
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<p>The f_sync function flushes the cached information of a writing file.</p>
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<pre>
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FRESULT f_sync (
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FIL* <em>FileObject</em> /* Pointer to the file object */
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);
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</pre>
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</div>
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<div class="para">
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<h4>Parameter</h4>
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<dl class="par">
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<dt>FileObject</dt>
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<dd>Pointer to the open file object to be flushed.</dd>
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</dl>
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</div>
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<div class="para">
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<h4>Return Values</h4>
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<dl class="ret">
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<dt>FR_OK (0)</dt>
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<dd>The function succeeded.</dd>
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<dt>FR_DISK_ERR</dt>
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<dd>The function failed due to an error in the disk function.</dd>
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<dt>FR_INT_ERR</dt>
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<dd>The function failed due to a wrong FAT structure or an internal error.</dd>
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<dt>FR_NOT_READY</dt>
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<dd>The disk drive cannot work due to no medium in the drive or any other reason.</dd>
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<dt>FR_INVALID_OBJECT</dt>
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<dd>The file object is invalid.</dd>
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</dl>
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</div>
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<div class="para">
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<h4>Description</h4>
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<p>The f_sync function performs the same process as f_close function but the file is left opened and can continue read/write/seek operations to the file. This is suitable for the applications that open files for a long time in write mode, such as data logger. Performing f_sync of periodic or immediataly after f_write can minimize the risk of data loss due to a sudden blackout or an unintentional disk removal. However f_sync immediataly before f_close has no advantage because f_close performs f_sync in it. In other words, the differnce between those functions is that the file object is invalidated or not. </p>
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</div>
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<div class="para">
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<h4>QuickInfo</h4>
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<p>Available when <tt>_FS_READONLY == 0</tt>.</p>
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</div>
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<div class="para">
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<h4>See Also</h4>
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<p><tt><a href="close.html">f_close</a></tt></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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