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<title>FatFs - f_open</title>
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<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>, /* 嬻偺僼傽僀儖丒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>堷悢</h4>
<dl class="par">
<dt>FileObject</dt>
<dd>怴偟偔嶌惉偡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埲崀丄偦偺僼傽僀儖傪暵偠傞傑偱偙偺僼傽僀儖丒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>奐偔(傑偨偼嶌惉偡傞)僼傽僀儖偺 <a href="filename.html">僼傽僀儖柤</a>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</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>撉傒弌偟儌乕僪偱奐偒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>彂偒崬傒儌乕僪偱奐偒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(僨僼僅儖僩)</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>
<tr><td>FA_CREATE_NEW</td><td>僼傽僀儖傪嶌惉偟傑偡丅摨柤偺僼傽僀儖偑偁傞応崌偼丄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摨柤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>
</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>FileObject</tt>峔憿懱傪巊偭偰偙偺僼傽僀儖傪憖嶌偱偒傑偡丅</dd>
<dt>FR_NO_FILE</dt>
<dd>僼傽僀儖偑尒偮偐傜側偄丅</dd>
<dt>FR_NO_PATH</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_INVALID_DRIVE</dt>
<dd>僪儔僀僽斣崋偑晄惓丅</dd>
<dt>FR_EXIST</dt>
<dd>摨柤偺僼傽僀儖偑婛偵偁傞丅</dd>
<dt>FR_DENIED</dt>
<dd>傾僋僙僗偑嫅斲偝傟偨丅儕乕僪丒僆儞儕乕丒僼傽僀儖偺彂偒崬傒儌乕僪丒僆乕僾儞丄摨柤偺僨傿儗僋僩儕傑偨偼儕乕僪丒僆儞儕乕丒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丒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丒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宯僆乕僾儞傪偟偨丅</dd>
<dt>FR_RW_ERROR</dt>
<dd>僨傿僗僋丒僄儔乕傑偨偼撪晹僄儔乕偵傛傞幐攕丅</dd>
<dt>FR_NOT_ENABLED</dt>
<dd>偦偺榑棟僪儔僀僽偵儚乕僋丒僄儕傾偑妱傝摉偰傜傟偰偄側偄丅</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>嶌惉偝傟偨僼傽僀儖丒僆僽僕僃僋僩偼丄埲崀偦偺僼傽僀儖偵懳偡傞傾僋僙僗偵巊梡偟傑偡丅僼傽僀儖傪暵偠傞偲偒偼丄<a href="close.html">f_close()</a>傪巊梡偟傑偡丅</p>
<p>僼傽僀儖憖嶌娭悢傪巊梡偡傞慜偵傑偢丄<a href="mount.html">f_mount()</a>傪巊偭偰偦傟偧傟偺榑棟僪儔僀僽偵儚乕僋丒僄儕傾(僼傽僀儖丒僔僗僥儉丒僆僽僕僃僋僩)傪梌偊側偗傟偽側傝傑偣傫丅偙偺弶婜壔偺屻丄偦偺榑棟僪儔僀僽偵懳偟偰慡偰偺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_CREATE_NEW, 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>巊梡椺乮僼傽僀儖丒僐僺乕乯</h4>
<pre>
void main ()
{
FATFS fs; // 榑棟僪儔僀僽偺儚乕僋丒僄儕傾(僼傽僀儖丒僔僗僥儉丒僆僽僕僃僋僩)
FIL fsrc, fdst; // 僼傽僀儖丒僆僽僕僃僋僩
BYTE buffer[4096]; // file copy buffer
FRESULT res; // FatFs function common result code
UINT br, bw; // File R/W count
// 僪儔僀僽0偺儚乕僋丒僄儕傾傪梌偊傞
f_mount(0, &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; // error or eof
res = f_write(&fdst, buffer, br, &bw);
if (res || bw < br) break; // error or disk full
}
// 慡偰偺僼傽僀儖傪暵偠傞
f_close(&fsrc);
f_close(&fdst);
// 儚乕僋丒僄儕傾傪奐曻偡傞
f_mount(0, 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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