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<title>FatFs - f_open</title>
</head>
<body>
<div class="para">
<h2>f_open</h2>
<p>僼傽僀儖傪僆乕僾儞傑偨偼嶌惉偟傑偡丅</p>
<pre>
FRESULT f_open (
FIL* <em>FileObject</em>, // 嶌惉偡傞僼傽僀儖僆僽僕僃僋僩峔憿懱傊偺億僀儞僞
const char* <em>FileName</em>, // 僼傽僀儖偺僼儖僷僗柤傊偺億僀儞僞
BYTE <em>ModeFlags</em> // 儌乕僪僼儔僌
);
</pre>
</div>
<div class="para">
<h4>僷儔儊乕僞</h4>
<dl class="par">
<dt>FileObject</dt>
<dd>怴偟偔嶌惉偡傞僼傽僀儖僆僽僕僃僋僩峔憿懱傊偺億僀儞僞傪巜掕偟傑偡丅埲崀丄偦偺僼傽僀儖傪暵偠傞傑偱偙偺僼傽僀儖僆僽僕僃僋僩傪巊梡偟偰僼傽僀儖憖嶌傪偟傑偡丅</dd>
<dt>FileName</dt>
<dd>嶌惉偡傞 (傑偨偼僆乕僾儞偡傞) 僼傽僀儖偺僼儖僷僗柤偑擖偭偨<tt>'\0'</tt>偱廔傢傞暥帤楍傊偺億僀儞僞傪巜掕偟傑偡丅僨傿儗僋僩儕僙僷儗乕僞偵偼<tt>'/'</tt>傪巊梡偟傑偡丅FatFs儌僕儏乕儖偵偼僇儗儞僩僨傿儗僋僩儕偺奣擮偑側偄偺偱丄僷僗偼儖乕僩僨傿儗僋僩儕偐傜扝傞愨懳僷僗偲側傝傑偡丅暥帤楍愭摢偺僗儁乕僗偼僗僉僢僾偝傟傑偡丅僷僗愭摢偺<tt>'/'</tt>偼偁偭偰傕側偔偰傕偐傑偄傑偣傫丅</dd>
<dt>ModeFlags</dt>
<dd>僼傽僀儖偺傾僋僙僗曽朄傗僆乕僾儞曽朄傪寛傔傞僼儔僌偱偡丅偙偺僷儔儊乕僞偵偼師偺慻傒崌傢偣傪巜掕偟傑偡丅<br>
<table class="lst">
<tr><th>抣</th><th>堄枴</th></td>
<tr><td>FA_READ</td><td>撉傒弌偟儌乕僪偱僆乕僾儞偟傑偡丅撉傒彂偒偡傞応崌偼<tt>FA_WRITE</tt>偲嫟偵巜掕偟傑偡丅</td></tr>
<tr><td>FA_WRITE</td><td>彂偒崬傒儌乕僪偱僆乕僾儞偟傑偡丅撉傒彂偒偡傞応崌偼<tt>FA_READ</tt>偲嫟偵巜掕偟傑偡丅</td></tr>
<tr><td>FA_OPEN_EXISTING</td><td>婛懚偺僼傽僀儖傪奐偒傑偡丅僼傽僀儖偑柍偄偲偒偼僄儔乕偵側傝傑偡丅</td></tr>
<tr><td>FA_CREATE_ALWAYS</td><td>僼傽僀儖傪嶌惉偟傑偡丅婛懚偺僼傽僀儖偑偁傞応崌偼丄僒僀僘傪0偵偟偰偐傜奐偒傑偡丅</td></tr>
<tr><td>FA_OPEN_ALWAYS</td><td>婛懚偺僼傽僀儖傪奐偒傑偡丅僼傽僀儖偑柍偄偲偒偼僼傽僀儖傪嶌惉偟傑偡丅</td></tr>
</table>
</dd>
</dl>
</div>
<div class="para">
<h4>栠傝抣</h4>
<dl class="ret">
<dt>FR_OK (0)</dt>
<dd>惓忢廔椆丅埲崀丄<tt><em>FileObject</em></tt>峔憿懱傪巊偭偰偙偺僼傽僀儖傪憖嶌偱偒傑偡丅僼傽僀儖傪暵偠傞偲偒偼丄<tt><a href="close.html">f_close()</a></tt>傪巊梡偟傑偡丅</dd>
<dt>FR_NOFILE</dt>
<dd>僼傽僀儖偑尒偮偐傜側偄丅</dd>
<dt>FR_NOPATH</dt>
<dd>僷僗偑尒偮偐傜側偄丅</dd>
<dt>FR_INVALID_NAME</dt>
<dd>僼傽僀儖柤偑晄惓丅</dd>
<dt>FR_DENIED</dt>
<dd>傾僋僙僗偑嫅斲偝傟偨丅儕乕僪僆儞儕乕僼傽僀儖偺彂偒崬傒儌乕僪僆乕僾儞丄摨柤偺僨傿儗僋僩儕傑偨偼儕乕僪僆儞儕僼傽僀儖偑偁傞忬懺偱偺僼傽僀儖嶌惉丄僨傿僗僋傑偨偼僨傿儗僋僩儕僥乕僽儖偑枮攖偱僼傽僀儖傪嶌惉偱偒側偄側偳丅</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僪儔僀僽偑摦嶌晄擻忬懺丅</dd>
<dt>FR_WRITE_PROTECTED</dt>
<dd>儊僨傿傾偑彂偒崬傒嬛巭忬懺偱彂偒崬傒僆乕僾儞傑偨偼僼傽僀儖嶌惉傪偟偨丅</dd>
<dt>FR_RW_ERROR</dt>
<dd>僨傿僗僋傾僋僙僗偱僄儔乕偑敪惗偟偨丅</dd>
<dt>FR_INCORRECT_DISK_CHANGE</dt>
<dd>晄惓側儊僨傿傾偺庢傝奜偟偑偁偭偨丅僼傽僀儖傪奐偄偨傑傑偺儊僨傿傾岎姺側偳丅</dd>
<dt>FR_NOT_ENABLED</dt>
<dd>FatFs儌僕儏乕儖偑掆巭忬懺丅</dd>
<dt>FR_NO_FILESYSTEM</dt>
<dd>僨傿僗僋忋偵桳岠側FAT僷乕僥乕僔儑儞偑尒偮偐傜側偄丅</dd>
</dl>
</div>
<div class="para">
<h4>夝愢</h4>
<p>FatFs儌僕儏乕儖偺巊梡傪奐巒偡傞偵偼傑偢丄FatFs儌僕儏乕儖偵儚乕僋僄儕傾乮峔憿懱<tt>FATFS</tt>乯傪妱傝摉偰傑偡丅妋曐偟偨儚乕僋僄儕傾傪0偱弶婜壔偟偨偁偲丄FatFs儌僕儏乕儖偺僌儘乕僶儖曄悢<em>FatFs</em>偵偦偺傾僪儗僗傪戙擖偡傞偩偗偱儌僕儏乕儖偼摦嶌壜擻忬懺偵側傝丄僼傽僀儖娭悢偑巊偊傞傛偆偵側傝傑偡丅</p>
<p>儕乕僪僆儞儕乕峔惉偱偼丄<tt>FA_WRITE, FA_CREATE_ALWAYS, FA_OPEN_ALWAYS</tt>偺奺僼儔僌偼僒億乕僩偝傟傑偣傫丅</p>
</div>
<div class="para">
<h4>巊梡椺乮僼傽僀儖僐僺乕乯</h4>
<pre>
void main ()
{
FATFS fs; // FatFs儚乕僋僄儕傾
FIL fsrc, fdst; // 僼傽僀儖僆僽僕僃僋僩
BYTE buffer[4096]; // file copy buffer
FRESULT res; // FatFs function common result code
WORD br, bw; // File R/W count
// FatFs偺儚乕僋僄儕傾傪妋曐偡傞
memset(&fs, 0, sizeof(FATFS));
FatFs = &fs;
// 僜乕僗丒僼傽僀儖傪奐偔
res = f_open(&fsrc, "/srcfile.dat", FA_OPEN_EXISTING | FA_READ);
if (res) die(res);
// 僨僗僥傿僱乕僔儑儞丒僼傽僀儖傪嶌惉偡傞
res = f_open(&fdst, "/dstfile.dat", FA_CREATE_ALWAYS | FA_WRITE);
if (res) die(res);
// 僜乕僗偐傜僨僗僥傿僱乕僔儑儞偵僐僺乕偡傞
for (;;) {
res = f_read(&fsrc, buffer, sizeof(buffer), &br);
if (res || br == 0) break;
res = f_write(&fdst, buffer, br, &bw);
if (res || bw < br) break;
}
// 慡偰偺僼傽僀儖傪暵偠傞
f_close(&fsrc);
f_close(&fdst);
// FatFs偺儚乕僋僄儕傾傪奐曻偡傞
FatFs = NULL;
}
</pre>
</div>
<div class="para">
<h4>嶲徠</h4>
<p><tt><a href="read.html">f_read</a>, <a href="write.html">f_write</a>, <a href="close.html">f_close</a>, <a href="sfile.html">FIL</a>, <a href="sfatfs.html">FATFS</a></tt></p>
</div>
<p class="foot"><a href="../00index_j.html">栠傞</a></p>
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