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方便飞利浦arm7tdmi 处理器lpc2100开发的C函数库 Procyon ARMlib-LPC2100 C-Language Function Library for Philips LPC21

00489             <span class="comment">// set path string</span>
00490             strcat(PathNameBuffer, FileNameBuffer);
00491             strcat(PathNameBuffer, <span class="stringliteral">"\\"</span>);
00492             <span class="comment">// return success</span>
00493             <span class="keywordflow">return</span> TRUE;
00494         }
00495         <span class="keywordflow">else</span>
00496         {
00497             <span class="comment">// not a directory, cannot CD into a file!</span>
00498             <span class="keywordflow">return</span> FALSE;
00499         }
00500     }
00501     <span class="keywordflow">else</span>
00502     {
00503         <span class="comment">// not a valid entry, cannot CD!</span>
00504         <span class="keywordflow">return</span> FALSE;
00505     }
00506 }
00507 
00508 <span class="keywordtype">void</span> fatPrintDirEntry(<span class="keywordtype">void</span>)
00509 {
00510     <span class="comment">// print a formatted dir-style output for most recent file</span>
00511     <span class="comment">// print date</span>
00512     <a class="code" href="rprintf_8h.html#a16">rprintfNum</a>(10, 2, FALSE, <span class="charliteral">'0'</span>, (FileInfo.CreateDate&amp;DD_MONTH_MASK)&gt;&gt;DD_MONTH_SHIFT );    <span class="comment">// month</span>
00513     <a class="code" href="rprintf_8h.html#a7">rprintfChar</a>(<span class="charliteral">'/'</span>);
00514     <a class="code" href="rprintf_8h.html#a16">rprintfNum</a>(10, 2, FALSE, <span class="charliteral">'0'</span>, (FileInfo.CreateDate&amp;DD_DAY_MASK)&gt;&gt;DD_DAY_SHIFT );        <span class="comment">// day</span>
00515     <a class="code" href="rprintf_8h.html#a7">rprintfChar</a>(<span class="charliteral">'/'</span>);
00516     <a class="code" href="rprintf_8h.html#a16">rprintfNum</a>(10, 4, FALSE, <span class="charliteral">'0'</span>, (FileInfo.CreateDate&amp;DD_YEAR_MASK)&gt;&gt;DD_YEAR_SHIFT );  <span class="comment">// year</span>
00517     <a class="code" href="rprintf_8h.html#a7">rprintfChar</a>(<span class="charliteral">' '</span>);
00518 
00519     <span class="comment">// print time</span>
00520     <a class="code" href="rprintf_8h.html#a16">rprintfNum</a>(10, 2, FALSE, <span class="charliteral">'0'</span>, (FileInfo.CreateTime&amp;DT_HOURS_MASK)&gt;&gt;DT_HOURS_SHIFT );    <span class="comment">// month</span>
00521     <a class="code" href="rprintf_8h.html#a7">rprintfChar</a>(<span class="charliteral">':'</span>);
00522     <a class="code" href="rprintf_8h.html#a16">rprintfNum</a>(10, 2, FALSE, <span class="charliteral">'0'</span>, (FileInfo.CreateTime&amp;DT_MINUTES_MASK)&gt;&gt;DT_MINUTES_SHIFT );        <span class="comment">// day</span>
00523     <a class="code" href="rprintf_8h.html#a7">rprintfChar</a>(<span class="charliteral">':'</span>);
00524     <a class="code" href="rprintf_8h.html#a16">rprintfNum</a>(10, 2, FALSE, <span class="charliteral">'0'</span>, 2*(FileInfo.CreateTime&amp;DT_2SECONDS_MASK)&gt;&gt;DT_2SECONDS_SHIFT );    <span class="comment">// seconds</span>
00525     <a class="code" href="rprintf_8h.html#a7">rprintfChar</a>(<span class="charliteral">' '</span>);
00526 
00527     <span class="comment">// print attributes</span>
00528     <span class="keywordflow">if</span>(FileInfo.Attr &amp; ATTR_VOLUME)     <a class="code" href="rprintf_8h.html#a7">rprintfChar</a>(<span class="charliteral">'V'</span>); <span class="keywordflow">else</span> <a class="code" href="rprintf_8h.html#a7">rprintfChar</a>(<span class="charliteral">'-'</span>);
00529     <span class="keywordflow">if</span>(FileInfo.Attr &amp; ATTR_DIRECTORY)  <a class="code" href="rprintf_8h.html#a7">rprintfChar</a>(<span class="charliteral">'D'</span>); <span class="keywordflow">else</span> <a class="code" href="rprintf_8h.html#a7">rprintfChar</a>(<span class="charliteral">'-'</span>);
00530     <span class="keywordflow">if</span>(FileInfo.Attr &amp; ATTR_READONLY)   <a class="code" href="rprintf_8h.html#a7">rprintfChar</a>(<span class="charliteral">'R'</span>); <span class="keywordflow">else</span> <a class="code" href="rprintf_8h.html#a7">rprintfChar</a>(<span class="charliteral">'-'</span>);
00531     <span class="keywordflow">if</span>(FileInfo.Attr &amp; ATTR_HIDDEN)     <a class="code" href="rprintf_8h.html#a7">rprintfChar</a>(<span class="charliteral">'H'</span>); <span class="keywordflow">else</span> <a class="code" href="rprintf_8h.html#a7">rprintfChar</a>(<span class="charliteral">'-'</span>);
00532     <span class="keywordflow">if</span>(FileInfo.Attr &amp; ATTR_SYSTEM)     <a class="code" href="rprintf_8h.html#a7">rprintfChar</a>(<span class="charliteral">'S'</span>); <span class="keywordflow">else</span> <a class="code" href="rprintf_8h.html#a7">rprintfChar</a>(<span class="charliteral">'-'</span>);
00533     <span class="keywordflow">if</span>(FileInfo.Attr &amp; ATTR_ARCHIVE)    <a class="code" href="rprintf_8h.html#a7">rprintfChar</a>(<span class="charliteral">'A'</span>); <span class="keywordflow">else</span> <a class="code" href="rprintf_8h.html#a7">rprintfChar</a>(<span class="charliteral">'-'</span>);
00534     <a class="code" href="rprintf_8h.html#a7">rprintfChar</a>(<span class="charliteral">' '</span>);
00535 
00536     <span class="comment">// print filesize</span>
00537     <a class="code" href="rprintf_8h.html#a16">rprintfNum</a>(10, 8, FALSE, <span class="charliteral">' '</span>, FileInfo.Size);   <span class="comment">// filesize</span>
00538     <a class="code" href="rprintf_8h.html#a7">rprintfChar</a>(<span class="charliteral">' '</span>);
00539 
00540     <span class="comment">// print filename</span>
00541     <a class="code" href="rprintf_8h.html#a8">rprintfStr</a>(FileNameBuffer);
00542 }
00543 
00544 <span class="keywordtype">void</span> fatDumpDirSlot(<span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> slot)
00545 {
00546     <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> sector;
00547     <span class="comment">// load correct sector</span>
00548     sector = fatClustToSect(CurrentDirStartCluster);
00549     sector += slot/DIRENTRIES_PER_SECTOR;
00550     <span class="comment">// print the entry as a hex table</span>
00551     <a class="code" href="debug_8h.html#a0">debugPrintHexTable</a>(32, SectorBuffer+(slot&lt;&lt;5) );
00552 }
00553 
00554 <span class="keyword">struct </span>FileInfoStruct* fatGetFileInfo(<span class="keywordtype">void</span>)
00555 {
00556     <span class="keywordflow">return</span> &amp;FileInfo;
00557 }
00558 
00559 <span class="comment">// return the size of the last directory entry</span>
00560 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> fatGetFilesize(<span class="keywordtype">void</span>)
00561 {
00562     <span class="keywordflow">return</span> FileInfo.Size;
00563 }
00564 
00565 <span class="comment">// return the long name of the last directory entry</span>
00566 <span class="keywordtype">char</span>* fatGetFilename(<span class="keywordtype">void</span>)
00567 {   
00568     <span class="keywordflow">return</span> FileNameBuffer;
00569 }
00570 
00571 <span class="comment">// return the directory of the last directory entry</span>
00572 <span class="keywordtype">char</span>* fatGetDirname(<span class="keywordtype">void</span>)
00573 {   
00574     <span class="keywordflow">return</span> PathNameBuffer;
00575 }
00576 
00577 <span class="comment">// load a clusterfull of data</span>
00578 <span class="keywordtype">void</span> fatLoadCluster(<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> cluster, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *buffer)
00579 {
00580     <span class="keyword">register</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> i;
00581     <span class="comment">// read cluster</span>
00582     <span class="comment">//while ( ataReadSectors( DRIVE0, clust2sect(cluster), SectorsPerCluster, buffer) != 0);</span>
00583     <span class="keywordflow">for</span>(i=0; i&lt;SectorsPerCluster; i++)
00584     {
00585         ataReadSectors( DRIVE0, fatClustToSect(cluster)+i, 1, buffer+(i&lt;&lt;9) );
00586         <span class="comment">// temporary fix for wierd misaligned cluster problem</span>
00587         <span class="comment">// (only when using FAT16?)</span>
00588 <span class="comment">//      ataReadSectors( DRIVE0, fatClustToSect(cluster+8)+i, 1, buffer+(i&lt;&lt;9) );</span>
00589     }
00590 }
00591 
00592 
00593 <span class="comment">// find next cluster in the FAT chain</span>
00594 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> fatNextCluster(<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> cluster)
00595 {
00596     <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> nextCluster;
00597     <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> fatMask;
00598     <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> fatOffset;
00599     <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> sector;
00600     <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> offset;
00601     
00602     <span class="comment">// get fat offset in bytes</span>
00603     <span class="keywordflow">if</span>(Fat32Enabled)
00604     {
00605         <span class="comment">// four FAT bytes (32 bits) for every cluster</span>
00606         fatOffset = cluster &lt;&lt; 2;
00607         <span class="comment">// set the FAT bit mask</span>
00608         fatMask = FAT32_MASK;
00609     }
00610     <span class="keywordflow">else</span>
00611     {
00612         <span class="comment">// two FAT bytes (16 bits) for every cluster</span>
00613         fatOffset = cluster &lt;&lt; 1;
00614         <span class="comment">// set the FAT bit mask</span>
00615         fatMask = FAT16_MASK;
00616     }
00617     
00618     <span class="comment">// calculate the FAT sector that we're interested in</span>
00619     sector = FirstFATSector + (fatOffset / BytesPerSector);
00620     <span class="comment">// calculate offset of the our entry within that FAT sector</span>
00621     offset = fatOffset % BytesPerSector;
00622 
00623     <span class="comment">// if we don't already have this FAT chunk loaded, go get it</span>
00624     <span class="keywordflow">if</span> (sector != FatInCache)
00625     {
00626         <span class="comment">// read sector of FAT table</span>
00627         <span class="keywordflow">while</span> (ataReadSectors( DRIVE0, sector, 1, (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>*)FAT_CACHE_ADDR) != 0);
00628         FatInCache = sector;
00629     }
00630 
00631     <span class="comment">// read the nextCluster value</span>
00632     nextCluster = (*((<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span>*) &amp;((<span class="keywordtype">char</span>*)FAT_CACHE_ADDR)[offset])) &amp; fatMask;
00633 
00634     <span class="comment">// check to see if we're at the end of the chain</span>
00635     <span class="keywordflow">if</span> (nextCluster == (CLUST_EOFE &amp; fatMask))
00636         nextCluster = 0;
00637 
00638 <span class="preprocessor">#ifdef DEBUG_FAT</span>
00639 <span class="preprocessor"></span>    <a class="code" href="rprintf_8h.html#a8">rprintfStr</a>(<span class="stringliteral">"&gt;"</span>);
00640     <a class="code" href="rprintf_8h.html#a15">rprintfu32</a>(nextCluster);
00641     <a class="code" href="rprintf_8c.html#a10">rprintfCRLF</a>();
00642 <span class="preprocessor">#endif</span>
00643 <span class="preprocessor"></span>    
00644     <span class="keywordflow">return</span> nextCluster;
00645 }
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