projects / z180-stamp.git / blame
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|---|---|---|
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1 | <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">\r |
| 2 | <html lang="en">\r | |
| 3 | <head>\r | |
| 4 | <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">\r | |
| 5 | <meta http-equiv="Content-Style-Type" content="text/css">\r | |
| 6 | <link rel="up" title="FatFs" href="../00index_e.html">\r | |
| 7 | <link rel="alternate" hreflang="ja" title="Japanese" href="../ja/sync.html">\r | |
| 8 | <link rel="stylesheet" href="../css_e.css" type="text/css" media="screen" title="ELM Default">\r | |
| 9 | <title>FatFs - f_sync</title>\r | |
| 10 | </head>\r | |
| 11 | \r | |
| 12 | <body>\r | |
| 13 | \r | |
| 14 | <div class="para func">\r | |
| 15 | <h2>f_sync</h2>\r | |
| 16 | <p>The f_sync function flushes the cached information of a writing file.</p>\r | |
| 17 | <pre>\r | |
| 18 | FRESULT f_sync (\r | |
| 19 | FIL* <span class="arg">fp</span> <span class="c">/* [IN] File object */</span>\r | |
| 20 | );\r | |
| 21 | </pre>\r | |
| 22 | </div>\r | |
| 23 | \r | |
| 24 | <div class="para arg">\r | |
| 25 | <h4>Parameter</h4>\r | |
| 26 | <dl class="par">\r | |
| 27 | <dt>fp</dt>\r | |
| 28 | <dd>Pointer to the open file object to be flushed.</dd>\r | |
| 29 | </dl>\r | |
| 30 | </div>\r | |
| 31 | \r | |
| 32 | \r | |
| 33 | <div class="para ret">\r | |
| 34 | <h4>Return Values</h4>\r | |
| 35 | <p>\r | |
| 36 | <a href="rc.html#ok">FR_OK</a>,\r | |
| 37 | <a href="rc.html#de">FR_DISK_ERR</a>,\r | |
| 38 | <a href="rc.html#ie">FR_INT_ERR</a>,\r | |
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39 | <a href="rc.html#io">FR_INVALID_OBJECT</a>,\r |
| 40 | <a href="rc.html#tm">FR_TIMEOUT</a>\r | |
| 41 | </p>\r | |
| 42 | </div>\r | |
| 43 | \r | |
| 44 | \r | |
| 45 | <div class="para desc">\r | |
| 46 | <h4>Description</h4>\r | |
| 70702af1 L |
47 | <p>The <tt>f_sync</tt> function performs the same process as <tt>f_close</tt> 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 <tt>f_sync</tt> function of periodic or immediataly after <tt>f_write</tt> function can minimize the risk of data loss due to a sudden blackout or an unintentional media removal. For more information, refer to <a href="appnote.html#critical">application note</a>.</p>\r |
| 48 | <p>However there is no sense in <tt>f_sync</tt> function immediataly before <tt>f_close</tt> function because it performs <tt>f_sync</tt> function in it. In other words, the differnce between those functions is that the file object is invalidated or not.</p>\r | |
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49 | </div>\r |
| 50 | \r | |
| 51 | \r | |
| 52 | <div class="para comp">\r | |
| 53 | <h4>QuickInfo</h4>\r | |
| 54 | <p>Available when <tt>_FS_READONLY == 0</tt>.</p>\r | |
| 55 | </div>\r | |
| 56 | \r | |
| 57 | \r | |
| 58 | <div class="para ref">\r | |
| 59 | <h4>See Also</h4>\r | |
| 60 | <p><tt><a href="close.html">f_close</a></tt></p>\r | |
| 61 | </div>\r | |
| 62 | \r | |
| 63 | <p class="foot"><a href="../00index_e.html">Return</a></p>\r | |
| 64 | </body>\r | |
| 65 | </html>\r |