FreeRTOS/Demo/Common/FileSystem/FatFs-0.7e/doc/ja/forward.html - third_party/github/FreeRTOS/FreeRTOS-Kernel - Git at Google

 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
 <html lang="ja">
 <head>
 <meta http-equiv="Content-Type" content="text/html; charset=Shift_JIS">
 <meta http-equiv="Content-Style-Type" content="text/css">
 <link rel="up" title="FatFs" href="../00index_j.html">
 <link rel="stylesheet" href="../css_j.css" type="text/css" media="screen" title="ELM Default">
 <title>FatFs - f_forward</title>
 </head>

 <body>

 <div class="para">
 <h2>f_forward</h2>
 <p>t@C©çf[^ðÇÝoµAMXg[É¼Ú]µÜ·B</p>
 <pre>
 FRESULT f_forward (
   FIL* <em>FileObject</em>,                 /* t@CEIuWFNg\¢Ì */
   UINT (*<em>Func</em>)(const BYTE*,UINT),  /* f[^]Ö */
   UINT <em>ByteToFwd</em>,                  /* ]·éoCg */
   UINT* <em>ByteFwd</em>                    /* ]³ê½oCg */
 );
 </pre>
 </div>

 <div class="para">
 <h4>ø</h4>
 <dl class="par">
 <dt>FileObject</dt>
 <dd>t@CEIuWFNg\¢ÌÖÌ|C^ðwèµÜ·B</dd>
 <dt>Func</dt>
 <dd>f[^ðn·[Uè`ÖÖÌ|C^ðwèµÜ·B±ÌÖÌdlÍTvðQÆµÄ¾³¢B</dd>
 <dt>ByteToRead</dt>
 <dd>]·éoCg(0`UINTÌÅål)ðwèµÜ·B</dd>
 <dt>ByteRead</dt>
 <dd>ÀÛÉ]³ê½oCgði[·éÏðw·|C^ðwèµÜ·B</dd>
 </dl>
 </div>


 <div class="para">
 <h4>ßèl</h4>
 <dl class="ret">
 <dt>FR_OK (0)</dt>
 <dd>³íI¹B</dd>
 <dt>FR_DENIED</dt>
 <dd>ñÇÝÝ[hÅJ¢½t@C©çÇÝà¤Æµ½B</dd>
 <dt>FR_DISK_ERR</dt>
 <dd>fBXNEG[Éæé¸sB</dd>
 <dt>FR_INT_ERR</dt>
 <dd>s³ÈFAT\¢Ü½ÍàG[Éæé¸sB</dd>
 <dt>FR_NOT_READY</dt>
 <dd>fBAªZbg³êÄ¢È¢ÈÇA¨hCuª®ìs\óÔB</dd>
 <dt>FR_INVALID_OBJECT</dt>
 <dd>³øÈt@CEIuWFNgB</dd>
 </dl>
 </div>


 <div class="para">
 <h4>ðà</h4>
 <p>t@CÌf[^ðobt@ÉÇÝo³¸ÉMXg[É¼Ú]µÜ·BAvP[V¤Åf[^Eobt@ðKvÆµÈ¢ÌÅAÌÀçê½Â«ÅLøÅ·B]JnÊuÍA»ÝÌt@CR/W|C^©çÉÈèÜ·Bt@CR/W|C^Í]³ê½oCg¾¯iÝÜ·Bwè³ê½oCgÌ]Ét@CÌI[ÉBµ½êâMXg[ªrW[ÉÈÁ½êA<tt>*ByteFwd</tt>Í<tt>ByteToFwd</tt>æèà¬³ÈèÜ·B</p>
 </div>


 <div class="para">
 <h4>Îîñ</h4>
 <p><tt>_USE_FORWARD == 1</tt>ÅAÂ<tt>_FS_TINY == 1</tt>ÌÆ«ÉgpÂ\Å·B</p>
 </div>


 <div class="para">
 <h4>gpáiI[fBIÄ¶j</h4>
 <pre>
 /*-----------------------------------------------------------------------*/
 /* f_forwardÖ©çÄÎêéf[^MÖÌá                           */
 /*-----------------------------------------------------------------------*/

 UINT out_stream (   /* ßèl: ]³ê½oCgÜ½ÍXg[ÌóÔ */
     const BYTE *p,  /* ]·éf[^ðw·|C^ */
     UINT btf        /* &gt;0: ]ðs¤(oCg). 0: Xg[ÌóÔð²×é */
 )
 {
     UINT cnt = 0;


     if (btf == 0) {     /* ZXv */
         /* Xg[ÌóÔðÔ· (0: rW[, 1: fB) */
         /* êUAfBðÔµ½çA±]vÅÈÆà1oCgÍ */
         /* ]³êÈ¢Æ f_forwardÖÍ FR_RW_ERROR ÆÈéB */
         if (FIFO_READY) cnt = 1;
     }
     else {              /* ]v */
         do {    /* SÄÌoCgð]·é©AXg[ªrW[ÉÈéÜÅJèÔ· */
             FIFO_PORT = *p++;
             cnt++;
         } while (cnt &lt; btf &amp;&amp; FIFO_READY);
     }

     return cnt;
 }


 /*-----------------------------------------------------------------------*/
 /* f_forwardÖÌgpá                                                 */
 /*-----------------------------------------------------------------------*/

 FRESULT play_file (
     char *fn        /* Ä¶·éI[fBIEt@C¼ðw·|C^ */
 )
 {
     FRESULT rc;
     FIL fil;
     UINT dmy;

     /* t@CðÇÝoµ[hÅJ */
     rc = f_open(&amp;fil, fn, FA_READ);

     /* SÄÌf[^ª]³êé©G[ª¶·éÜÅ±¯é */
     while (rc == FR_OK &amp;&amp; fil.fptr &lt; fil.fsize) {

         /* Ù©Ì... */

         /* èúIÜ½ÍvÉ¶Äf[^ðXg[Éo·é */
         rc = f_forward(&amp;fil, out_stream, 1000, &amp;dmy);
     }

     return rc;	/* FR_OK: ³íI¹, Ù©:ÙíI¹ */
 }
 </pre>
 </div>


 <div class="para">
 <h4>QÆ</h4>
 <p><tt><a href="open.html">f_open</a>, <a href="gets.html">fgets</a>, <a href="write.html">f_write</a>, <a href="close.html">f_close</a>, <a href="sfile.html">FIL</a></tt></p>
 </div>

 <p class="foot"><a href="../00index_j.html">ßé</a></p>
 </body>
 </html>
	<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
	<html lang="ja">
	<head>
	<meta http-equiv="Content-Type" content="text/html; charset=Shift_JIS">
	<meta http-equiv="Content-Style-Type" content="text/css">
	<link rel="up" title="FatFs" href="../00index_j.html">
	<link rel="stylesheet" href="../css_j.css" type="text/css" media="screen" title="ELM Default">
	<title>FatFs - f_forward</title>
	</head>

	<body>

	<div class="para">
	<h2>f_forward</h2>
	<p>t@C©çf[^ðÇÝoµAMXg[É¼Ú]µÜ·B</p>
	<pre>
	FRESULT f_forward (
	FIL* <em>FileObject</em>, /* t@CEIuWFNg\¢Ì */
	UINT (<em>Func</em>)(const BYTE,UINT), /* f[^]Ö */
	UINT <em>ByteToFwd</em>, /* ]·éoCg */
	UINT* <em>ByteFwd</em> /* ]³ê½oCg */
	);
	</pre>
	</div>

	<div class="para">
	<h4>ø</h4>
	<dl class="par">
	<dt>FileObject</dt>
	<dd>t@CEIuWFNg\¢ÌÖÌ\|C^ðwèµÜ·B</dd>
	<dt>Func</dt>
	<dd>f[^ðn·[Uè`ÖÖÌ\|C^ðwèµÜ·B±ÌÖÌdlÍTvðQÆµÄ¾³¢B</dd>
	<dt>ByteToRead</dt>
	<dd>]·éoCg(0`UINTÌÅål)ðwèµÜ·B</dd>
	<dt>ByteRead</dt>
	<dd>ÀÛÉ]³ê½oCgði[·éÏðw·\|C^ðwèµÜ·B</dd>
	</dl>
	</div>


	<div class="para">
	<h4>ßèl</h4>
	<dl class="ret">
	<dt>FR_OK (0)</dt>
	<dd>³íI¹B</dd>
	<dt>FR_DENIED</dt>
	<dd>ñÇÝÝ[hÅJ¢½t@C©çÇÝà¤Æµ½B</dd>
	<dt>FR_DISK_ERR</dt>
	<dd>fBXNEG[Éæé¸sB</dd>
	<dt>FR_INT_ERR</dt>
	<dd>s³ÈFAT\¢Ü½ÍàG[Éæé¸sB</dd>
	<dt>FR_NOT_READY</dt>
	<dd>fBAªZbg³êÄ¢È¢ÈÇA¨hCuª®ìs\óÔB</dd>
	<dt>FR_INVALID_OBJECT</dt>
	<dd>³øÈt@CEIuWFNgB</dd>
	</dl>
	</div>


	<div class="para">
	<h4>ðà</h4>
	<p>t@CÌf[^ðobt@ÉÇÝo³¸ÉMXg[É¼Ú]µÜ·BAvP[V¤Åf[^Eobt@ðKvÆµÈ¢ÌÅAÌÀçê½Â«ÅLøÅ·B]JnÊuÍA»ÝÌt@CR/W\|C^©çÉÈèÜ·Bt@CR/W\|C^Í]³ê½oCg¾¯iÝÜ·Bwè³ê½oCgÌ]Ét@CÌI[ÉBµ½êâMXg[ªrW[ÉÈÁ½êA<tt>*ByteFwd</tt>Í<tt>ByteToFwd</tt>æèà¬³ÈèÜ·B</p>
	</div>


	<div class="para">
	<h4>Îîñ</h4>
	<p><tt>_USE_FORWARD == 1</tt>ÅAÂ<tt>_FS_TINY == 1</tt>ÌÆ«ÉgpÂ\Å·B</p>
	</div>


	<div class="para">
	<h4>gpáiI[fBIÄ¶j</h4>
	<pre>
	/-----------------------------------------------------------------------/
	/* f_forwardÖ©çÄÎêéf[^MÖÌá */
	/-----------------------------------------------------------------------/

	UINT out_stream ( /* ßèl: ]³ê½oCgÜ½ÍXg[ÌóÔ */
	const BYTE p, / ]·éf[^ðw·\|C^ */
	UINT btf /* >0: ]ðs¤(oCg). 0: Xg[ÌóÔð²×é */
	)
	{
	UINT cnt = 0;


	if (btf == 0) { /* ZXv */
	/* Xg[ÌóÔðÔ· (0: rW[, 1: fB) */
	/* êUAfBðÔµ½çA±]vÅÈÆà1oCgÍ */
	/* ]³êÈ¢Æ f_forwardÖÍ FR_RW_ERROR ÆÈéB */
	if (FIFO_READY) cnt = 1;
	}
	else { /* ]v */
	do { /* SÄÌoCgð]·é©AXg[ªrW[ÉÈéÜÅJèÔ· */
	FIFO_PORT = *p++;
	cnt++;
	} while (cnt < btf && FIFO_READY);
	}

	return cnt;
	}


	/-----------------------------------------------------------------------/
	/* f_forwardÖÌgpá */
	/-----------------------------------------------------------------------/

	FRESULT play_file (
	char fn / Ä¶·éI[fBIEt@C¼ðw·\|C^ */
	)
	{
	FRESULT rc;
	FIL fil;
	UINT dmy;

	/* t@CðÇÝoµ[hÅJ */
	rc = f_open(&fil, fn, FA_READ);

	/* SÄÌf[^ª]³êé©G[ª¶·éÜÅ±¯é */
	while (rc == FR_OK && fil.fptr < fil.fsize) {

	/* Ù©Ì... */

	/* èúIÜ½ÍvÉ¶Äf[^ðXg[Éo·é */
	rc = f_forward(&fil, out_stream, 1000, &dmy);
	}

	return rc; /* FR_OK: ³íI¹, Ù©:ÙíI¹ */
	}
	</pre>
	</div>


	<div class="para">
	<h4>QÆ</h4>
	<p><tt><a href="open.html">f_open</a>, <a href="gets.html">fgets</a>, <a href="write.html">f_write</a>, <a href="close.html">f_close</a>, <a href="sfile.html">FIL</a></tt></p>
	</div>

	<p class="foot"><a href="../00index_j.html">ßé</a></p>
	</body>
	</html>