fatfs/doc/ja/forward.html

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   9 <title>FatFs - f_forward</title>
  10 </head>
  11
  12 <body>
  13
  14 <div class="para func">
  15 <h2>f_forward</h2>
  16 <p>\83t\83@\83C\83\8b\82©\82ç\83f\81[\83^\82ð\93Ç\82Ý\8fo\82µ\81A\91\97\90M\83X\83g\83\8a\81[\83\80\82É\92¼\90Ú\93]\91\97\82µ\82Ü\82·\81B</p>
  17 <pre>
  18 FRESULT f_forward (
  19   FIL* <span class="arg">fp</span>,                         <span class="c">/* [IN] \83t\83@\83C\83\8b\81E\83I\83u\83W\83F\83N\83g\8d\\91¢\91Ì */</span>
  20   UINT (*<span class="arg">func</span>)(const BYTE*,UINT),  <span class="c">/* [IN] \83f\81[\83^\93]\91\97\8aÖ\90\94 */</span>
  21   UINT <span class="arg">btf</span>,                        <span class="c">/* [IN] \93]\91\97\82·\82é\83o\83C\83g\90\94 */</span>
  22   UINT* <span class="arg">bf</span>                         <span class="c">/* [OUT] \93]\91\97\82³\82ê\82½\83o\83C\83g\90\94 */</span>
  23 );
  24 </pre>
  25 </div>
  26
  27 <div class="para arg">
  28 <h4>\88ø\90\94</h4>
  29 <dl class="par">
  30 <dt>fp</dt>
  31 <dd>\83t\83@\83C\83\8b\81E\83I\83u\83W\83F\83N\83g\8d\\91¢\91Ì\82Ö\82Ì\83|\83C\83\93\83^\82ð\8ew\92è\82µ\82Ü\82·\81B</dd>
  32 <dt>func</dt>
  33 <dd>\83f\81[\83^\82ð\93n\82·\83\86\81[\83U\92è\8b`\8aÖ\90\94\82Ö\82Ì\83|\83C\83\93\83^\82ð\8ew\92è\82µ\82Ü\82·\81B\82±\82Ì\8aÖ\90\94\82Ì\8ed\97l\82Í\83T\83\93\83v\83\8b\82ð\8eQ\8fÆ\82µ\82Ä\82\82¾\82³\82¢\81B</dd>
  34 <dt>btf</dt>
  35 <dd>\93]\91\97\82·\82é\83o\83C\83g\90\94(0\81`UINT\82Ì\8dÅ\91å\92l)\82ð\8ew\92è\82µ\82Ü\82·\81B</dd>
  36 <dt>bf</dt>
  37 <dd>\8eÀ\8dÛ\82É\93]\91\97\82³\82ê\82½\83o\83C\83g\90\94\82ð\8ai\94[\82·\82é\95Ï\90\94\82ð\8ew\82·\83|\83C\83\93\83^\82ð\8ew\92è\82µ\82Ü\82·\81B</dd>
  38 </dl>
  39 </div>
  40
  41
  42 <div class="para ret">
  43 <h4>\96ß\82è\92l</h4>
  44 <p>
  45 <a href="rc.html#ok">FR_OK</a>,
  46 <a href="rc.html#de">FR_DISK_ERR</a>,
  47 <a href="rc.html#ie">FR_INT_ERR</a>,
  48 <a href="rc.html#nr">FR_NOT_READY</a>,
  49 <a href="rc.html#de">FR_DENIED</a>,
  50 <a href="rc.html#io">FR_INVALID_OBJECT</a>,
  51 <a href="rc.html#tm">FR_TIMEOUT</a>
  52 </p>
  53 </div>
  54
  55
  56 <div class="para desc">
  57 <h4>\89ð\90à</h4>
  58 <p>\83t\83@\83C\83\8b\82Ì\83f\81[\83^\82ð\83o\83b\83t\83@\82É\93Ç\82Ý\8fo\82³\82¸\82É\91\97\90M\83X\83g\83\8a\81[\83\80\82É\92¼\90Ú\93]\91\97\82µ\82Ü\82·\81B\83A\83v\83\8a\83P\81[\83V\83\87\83\93\91¤\82Å\83f\81[\83^\81E\83o\83b\83t\83@\82ð\95K\97v\82Æ\82µ\82È\82¢\82Ì\82Å\81A\83\81\83\82\83\8a\82Ì\8cÀ\82ç\82ê\82½\8aÂ\8b«\82Å\97L\8cø\82Å\82·\81B\83\8a\81[\83h/\83\89\83C\83g\81E\83|\83C\83\93\83^\82Í\93]\91\97\82³\82ê\82½\83o\83C\83g\90\94\82¾\82¯\90i\82Ý\82Ü\82·\81B\8ew\92è\82³\82ê\82½\83o\83C\83g\90\94\82Ì\93]\91\97\92\86\82É\83t\83@\83C\83\8b\82Ì\8fI\92[\82É\92B\82µ\82½\8fê\8d\87\82â\91\97\90M\83X\83g\83\8a\81[\83\80\82ª\83r\83W\81[\82É\82È\82Á\82½\8fê\8d\87\81A<tt class="arg">*bf</tt>\82Í<tt class="arg">btf</tt>\82æ\82è\82à\8f¬\82³\82\82È\82è\82Ü\82·\81B</p>
  59 </div>
  60
  61
  62 <div class="para comp">
  63 <h4>\91Î\89\9e\8fî\95ñ</h4>
  64 <p><tt>_USE_FORWARD == 1</tt>\82Å\81A\8a\8e\82Â<tt>_FS_TINY == 1</tt>\82Ì\82Æ\82«\82É\8eg\97p\89Â\94\\82Å\82·\81B</p>
  65 </div>
  66
  67
  68 <div class="para use">
  69 <h4>\8eg\97p\97á\81i\83I\81[\83f\83B\83I\8dÄ\90¶\81j</h4>
  70 <pre>
  71 <span class="c">/*-----------------------------------------------------------------------*/</span>
  72 <span class="c">/* f_forward\8aÖ\90\94\82©\82ç\8cÄ\82Î\82ê\82é\83f\81[\83^\91\97\90M\8aÖ\90\94\82Ì\97á                           */</span>
  73 <span class="c">/*-----------------------------------------------------------------------*/</span>
  74
  75 UINT out_stream (   <span class="c">/* \96ß\82è\92l: \93]\91\97\82³\82ê\82½\83o\83C\83g\90\94\82Ü\82½\82Í\83X\83g\83\8a\81[\83\80\82Ì\8fó\91Ô */</span>
  76     const BYTE *p,  <span class="c">/* \93]\91\97\82·\82é\83f\81[\83^\82ð\8ew\82·\83|\83C\83\93\83^ */</span>
  77     UINT btf        <span class="c">/* &gt;0: \93]\91\97\82ð\8ds\82¤(\83o\83C\83g\90\94). 0: \83X\83g\83\8a\81[\83\80\82Ì\8fó\91Ô\82ð\92²\82×\82é */</span>
  78 )
  79 {
  80     UINT cnt = 0;
  81
  82
  83     if (btf == 0) {     <span class="c">/* \83Z\83\93\83X\97v\8b\81 */</span>
  84         <span class="c">/* \83X\83g\83\8a\81[\83\80\82Ì\8fó\91Ô\82ð\95Ô\82· (0: \83r\83W\81[, 1: \83\8c\83f\83B) */</span>
  85         <span class="c">/* \88ê\92U\81A\83\8c\83f\83B\82ð\95Ô\82µ\82½\82ç\81A\91±\82\93]\91\97\97v\8b\81\82Å\8f\82È\82\82Æ\82à1\83o\83C\83g\82Í */</span>
  86         <span class="c">/* \93]\91\97\82³\82ê\82È\82¢\82Æ f_forward\8aÖ\90\94\82Í FR_INT_ERR \82Æ\82È\82é\81B */</span>
  87         if (FIFO_READY) cnt = 1;
  88     }
  89     else {              <span class="c">/* \93]\91\97\97v\8b\81 */</span>
  90         do {    <span class="c">/* \91S\82Ä\82Ì\83o\83C\83g\82ð\93]\91\97\82·\82é\82©\81A\83X\83g\83\8a\81[\83\80\82ª\83r\83W\81[\82É\82È\82é\82Ü\82Å\8cJ\82è\95Ô\82· */</span>
  91             FIFO_PORT = *p++;
  92             cnt++;
  93         } while (cnt &lt; btf &amp;&amp; FIFO_READY);
  94     }
  95
  96     return cnt;
  97 }
  98
  99
 100 <span class="c">/*-----------------------------------------------------------------------*/</span>
 101 <span class="c">/* f_forward\8aÖ\90\94\82Ì\8eg\97p\97á                                                 */</span>
 102 <span class="c">/*-----------------------------------------------------------------------*/</span>
 103
 104 FRESULT play_file (
 105     char *fn        <span class="c">/* \8dÄ\90¶\82·\82é\83I\81[\83f\83B\83I\81E\83t\83@\83C\83\8b\96¼\82ð\8ew\82·\83|\83C\83\93\83^ */</span>
 106 )
 107 {
 108     FRESULT rc;
 109     FIL fil;
 110     UINT dmy;
 111
 112     <span class="c">/* \83t\83@\83C\83\8b\82ð\93Ç\82Ý\8fo\82µ\83\82\81[\83h\82Å\8aJ\82 */</span>
 113     rc = f_open(&amp;fil, fn, FA_READ);
 114     if (rc) return rc;
 115
 116     <span class="c">/* \91S\82Ä\82Ì\83f\81[\83^\82ª\93]\91\97\82³\82ê\82é\82©\83G\83\89\81[\82ª\94\90¶\82·\82é\82Ü\82Å\91±\82¯\82é */</span>
 117     while (rc == FR_OK &amp;&amp; fil.fptr &lt; fil.fsize) {
 118
 119         <span class="c">/* \82Ù\82©\82Ì\8f\88\97\9d... */</span>
 120
 121         <span class="c">/* \92è\8aú\93I\82Ü\82½\82Í\97v\8b\81\82É\89\9e\82¶\82Ä\83f\81[\83^\82ð\83X\83g\83\8a\81[\83\80\82É\91\97\8fo\82·\82é */</span>
 122         rc = f_forward(&amp;fil, out_stream, 1000, &amp;dmy);
 123     }
 124
 125     <span class="c">/* \83t\83@\83C\83\8b\82ð\95Â\82¶\82Ä\96ß\82é */</span>
 126     f_close(&amp;fil);
 127     return rc;
 128 }
 129 </pre>
 130 </div>
 131
 132
 133 <div class="para ref">
 134 <h4>\8eQ\8fÆ</h4>
 135 <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>
 136 </div>
 137
 138 <p class="foot"><a href="../00index_j.html">\96ß\82é</a></p>
 139 </body>
 140 </html>