?? lseek.html
字號:
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<link rel="up" title="FatFs" href="../00index_j.html">
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<title>FatFs - f_lseek</title>
</head>
<body>
<div class="para">
<h2>f_lseek</h2>
<p>僼傽僀儖偺R/W億僀儞僞傪堏摦偟傑偡丅</p>
<pre>
FRESULT f_lseek (
FIL* <em>FileObject</em>, /* 僼傽僀儖丒僆僽僕僃僋僩峔憿懱傊偺億僀儞僞 */
DWORD <em>Offset</em> /* 堏摦愭僆僼僙僢僩 */
);
</pre>
</div>
<div class="para">
<h4>堷悢</h4>
<dl class="par">
<dt>FileObject</dt>
<dd>懳徾偲側傞僼傽僀儖丒僆僽僕僃僋僩峔憿懱傊偺億僀儞僞傪巜掕偟傑偡丅</dd>
<dt>Offset</dt>
<dd>堏摦愭偺僆僼僙僢僩乮R/W億僀儞僞乯抣丅僼傽僀儖愭摢偐傜偺僆僼僙僢僩傪僶僀僩扨埵偱巜掕偟傑偡丅</dd>
</dl>
</div>
<div class="para">
<h4>栠傝抣</h4>
<dl class="ret">
<dt>FR_OK (0)</dt>
<dd>惓忢廔椆丅</dd>
<dt>FR_RW_ERROR</dt>
<dd>僨傿僗僋丒傾僋僙僗偱僄儔乕偑敪惗偟偨丅</dd>
<dt>FR_NOT_READY</dt>
<dd>儊僨傿傾偑僙僢僩偝傟偰偄側偄側偳丄僨傿僗僋丒僪儔僀僽偑摦嶌晄擻忬懺丅</dd>
<dt>FR_INVALID_OBJECT</dt>
<dd>柍岠側僼傽僀儖僆僽僕僃僋僩丅</dd>
</dl>
</div>
<div class="para">
<h4>夝愢</h4>
<p>僼傽僀儖R/W億僀儞僞傪堏摦偟傑偡丅僆僼僙僢僩偺巜掕偼僼傽僀儖愭摢偐傜偺傒偱偡丅僼傽僀儖枛旜埲崀傊偺堏摦偼偱偒傑偣傫丅僼傽僀儖丒僒僀僘埲忋偺僆僼僙僢僩傪巜掕偟偨応崌丄R/W億僀儞僞偼僼傽僀儖丒僒僀僘偲摨偠偵側傝傑偡丅</p>
</div>
<div class="para">
<h4>巊梡椺</h4>
<pre>
// 僼傽僀儖愭摢偐傜5000僶僀僩栚傊堏摦
res = f_lseek(&file, 5000);
// 3000僶僀僩恑傔傞
res = f_lseek(&file, file.fptr + 3000);
// 2000僶僀僩栠偡
res = f_lseek(&file, file.fptr - 2000);
// 僼傽僀儖捛婰偺弨旛
res = f_lseek(&file, file.fsize);
</pre>
</div>
<div class="para">
<h4>嶲徠</h4>
<p><tt><a href="open.html">f_open</a>, <a href="sfile.html">FIL</a></tt></p>
</div>
<p class="foot"><a href="../00index_j.html">栠傞</a></p>
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