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| <title>FatFs - f_sync</title> | |
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| <div class="para"> | |
| <h2>f_sync</h2> | |
| <p>The f_sync function flushes the cached information of a writing file.</p> | |
| <pre> | |
| FRESULT f_sync ( | |
| FIL* <em>FileObject</em> /* Pointer to the file object */ | |
| ); | |
| </pre> | |
| </div> | |
| <div class="para"> | |
| <h4>Parameter</h4> | |
| <dl class="par"> | |
| <dt>FileObject</dt> | |
| <dd>Pointer to the open 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_DISK_ERR</dt> | |
| <dd>The function failed due to an error in the disk function.</dd> | |
| <dt>FR_INT_ERR</dt> | |
| <dd>The function failed due to a wrong FAT structure or an internal error.</dd> | |
| <dt>FR_NOT_READY</dt> | |
| <dd>The disk drive cannot work due to no medium in the drive or any other reason.</dd> | |
| <dt>FR_INVALID_OBJECT</dt> | |
| <dd>The file object is invalid.</dd> | |
| </dl> | |
| </div> | |
| <div class="para"> | |
| <h4>Description</h4> | |
| <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 class="para"> | |
| <h4>QuickInfo</h4> | |
| <p>Available when <tt>_FS_READONLY == 0</tt>.</p> | |
| </div> | |
| <div class="para"> | |
| <h4>See Also</h4> | |
| <p><tt><a href="close.html">f_close</a></tt></p> | |
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