fat_8h-source.html

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

00264         BYTE bpbBigFATsecs[4];      <span class="comment">// like bpbFATsecs for FAT32</span>
00265         BYTE bpbExtFlags[2];        <span class="comment">// extended flags:</span>
00266         BYTE bpbFSVers[2];          <span class="comment">// filesystem version</span>
00267         BYTE bpbRootClust[4];       <span class="comment">// start cluster for root directory</span>
00268         BYTE bpbFSInfo[2];          <span class="comment">// filesystem info structure sector</span>
00269         BYTE bpbBackup[2];          <span class="comment">// backup boot sector</span>
00270         <span class="comment">// There is a 12 byte filler here, but we ignore it</span>
00271 } GNUC_PACKED;
00272 
00273 <span class="comment">// FAT32 FSInfo block.</span>
00274 <span class="keyword">struct </span>fsinfo {
00275         BYTE fsisig1[4];
00276         BYTE fsifill1[480];
00277         BYTE fsisig2[4];
00278         BYTE fsinfree[4];
00279         BYTE fsinxtfree[4];
00280         BYTE fsifill2[12];
00281         BYTE fsisig3[4];
00282         BYTE fsifill3[508];
00283         BYTE fsisig4[4];
00284 } GNUC_PACKED;
00285 
00286 
00287 <span class="comment">/***************************************************************/</span>
00288 <span class="comment">/***************************************************************/</span>
00289 
00290 
00291 <span class="comment">// Structure of a dos directory entry.</span>
00292 <span class="keyword">struct </span>direntry {
00293         BYTE        deName[8];      <span class="comment">// filename, blank filled</span>
00294 <span class="preprocessor">#define SLOT_EMPTY      0x00            // slot has never been used</span>
00295 <span class="preprocessor"></span><span class="preprocessor">#define SLOT_E5         0x05            // the real value is 0xE5</span>
00296 <span class="preprocessor"></span><span class="preprocessor">#define SLOT_DELETED    0xE5            // file in this slot deleted</span>
00297 <span class="preprocessor"></span>        BYTE        deExtension[3]; <span class="comment">// extension, blank filled</span>
00298         BYTE        deAttributes;   <span class="comment">// file attributes</span>
00299 <span class="preprocessor">#define ATTR_NORMAL     0x00            // normal file</span>
00300 <span class="preprocessor"></span><span class="preprocessor">#define ATTR_READONLY   0x01            // file is readonly</span>
00301 <span class="preprocessor"></span><span class="preprocessor">#define ATTR_HIDDEN     0x02            // file is hidden</span>
00302 <span class="preprocessor"></span><span class="preprocessor">#define ATTR_SYSTEM     0x04            // file is a system file</span>
00303 <span class="preprocessor"></span><span class="preprocessor">#define ATTR_VOLUME     0x08            // entry is a volume label</span>
00304 <span class="preprocessor"></span><span class="preprocessor">#define ATTR_LONG_FILENAME  0x0F        // this is a long filename entry                </span>
00305 <span class="preprocessor"></span><span class="preprocessor">#define ATTR_DIRECTORY  0x10            // entry is a directory name</span>
00306 <span class="preprocessor"></span><span class="preprocessor">#define ATTR_ARCHIVE    0x20            // file is new or modified</span>
00307 <span class="preprocessor"></span>        BYTE        deLowerCase;    <span class="comment">// NT VFAT lower case flags  (set to zero)</span>
00308 <span class="preprocessor">#define LCASE_BASE      0x08            // filename base in lower case</span>
00309 <span class="preprocessor"></span><span class="preprocessor">#define LCASE_EXT       0x10            // filename extension in lower case</span>
00310 <span class="preprocessor"></span>        BYTE        deCHundredth;   <span class="comment">// hundredth of seconds in CTime</span>
00311         BYTE        deCTime[2];     <span class="comment">// create time</span>
00312         BYTE        deCDate[2];     <span class="comment">// create date</span>
00313         BYTE        deADate[2];     <span class="comment">// access date</span>
00314         WORD        deHighClust;    <span class="comment">// high bytes of cluster number</span>
00315         BYTE        deMTime[2];     <span class="comment">// last update time</span>
00316         BYTE        deMDate[2];     <span class="comment">// last update date</span>
00317         WORD        deStartCluster; <span class="comment">// starting cluster of file</span>
00318         DWORD       deFileSize;     <span class="comment">// size of file in bytes</span>
00319 } GNUC_PACKED;
00320 
00321 <span class="comment">// number of directory entries in one sector</span>
00322 <span class="preprocessor">#define DIRENTRIES_PER_SECTOR   0x10</span>
00323 <span class="preprocessor"></span>
00324 <span class="comment">// Structure of a Win95 long name directory entry</span>
00325 <span class="keyword">struct </span>winentry {
00326         BYTE        weCnt;          <span class="comment">// </span>
00327 <span class="preprocessor">#define WIN_LAST        0x40</span>
00328 <span class="preprocessor"></span><span class="preprocessor">#define WIN_CNT         0x3f</span>
00329 <span class="preprocessor"></span>        BYTE        wePart1[10];
00330         BYTE        weAttributes;
00331 <span class="preprocessor">#define ATTR_WIN95      0x0f</span>
00332 <span class="preprocessor"></span>        BYTE        weReserved1;
00333         BYTE        weChksum;
00334         BYTE        wePart2[12];
00335         WORD        weReserved2;
00336         BYTE        wePart3[4];
00337 } GNUC_PACKED;
00338 
00339 <span class="preprocessor">#define WIN_ENTRY_CHARS 13      // Number of chars per winentry</span>
00340 <span class="preprocessor"></span>
00341 <span class="comment">// Maximum filename length in Win95</span>
00342 <span class="comment">// Note: Must be &lt; sizeof(dirent.d_name)</span>
00343 <span class="preprocessor">#define WIN_MAXLEN      255</span>
00344 <span class="preprocessor"></span>
00345 <span class="comment">// This is the format of the contents of the deTime field in the direntry</span>
00346 <span class="comment">// structure.</span>
00347 <span class="comment">// We don't use bitfields because we don't know how compilers for</span>
00348 <span class="comment">// arbitrary machines will lay them out.</span>
00349 <span class="preprocessor">#define DT_2SECONDS_MASK        0x1F    // seconds divided by 2</span>
00350 <span class="preprocessor"></span><span class="preprocessor">#define DT_2SECONDS_SHIFT       0</span>
00351 <span class="preprocessor"></span><span class="preprocessor">#define DT_MINUTES_MASK         0x7E0   // minutes</span>
00352 <span class="preprocessor"></span><span class="preprocessor">#define DT_MINUTES_SHIFT        5</span>
00353 <span class="preprocessor"></span><span class="preprocessor">#define DT_HOURS_MASK           0xF800  // hours</span>
00354 <span class="preprocessor"></span><span class="preprocessor">#define DT_HOURS_SHIFT          11</span>
00355 <span class="preprocessor"></span>
00356 <span class="comment">// This is the format of the contents of the deDate field in the direntry</span>
00357 <span class="comment">// structure.</span>
00358 <span class="preprocessor">#define DD_DAY_MASK             0x1F    // day of month</span>
00359 <span class="preprocessor"></span><span class="preprocessor">#define DD_DAY_SHIFT            0</span>
00360 <span class="preprocessor"></span><span class="preprocessor">#define DD_MONTH_MASK           0x1E0   // month</span>
00361 <span class="preprocessor"></span><span class="preprocessor">#define DD_MONTH_SHIFT          5</span>
00362 <span class="preprocessor"></span><span class="preprocessor">#define DD_YEAR_MASK            0xFE00  // year - 1980</span>
00363 <span class="preprocessor"></span><span class="preprocessor">#define DD_YEAR_SHIFT           9</span>
00364 <span class="preprocessor"></span>
00365 <span class="comment">// Stuctures</span>
00366 <span class="keyword">struct </span>FileInfoStruct
00367 {
00368     <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> StartCluster;         <span class="comment">//&lt; file starting cluster for last file accessed</span>
00369     <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> Size;                 <span class="comment">//&lt; file size for last file accessed</span>
00370     <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> Attr;                 <span class="comment">//&lt; file attr for last file accessed</span>
00371     <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> CreateTime;          <span class="comment">//&lt; file creation time for last file accessed</span>
00372     <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> CreateDate;          <span class="comment">//&lt; file creation date for last file accessed</span>
00373 } GNUC_PACKED;
00374 
00375 <span class="comment">// Prototypes</span>
00376 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> fatInit( <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> device);
00377 <span class="keywordtype">void</span> fatPrintPartition(<span class="keyword">struct</span> partrecord *partition);
00378 <span class="keywordtype">void</span> fatPrintPartitionTable(<span class="keyword">struct</span> partsector *buffer);
00379 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> fatClusterSize(<span class="keywordtype">void</span>);
00380 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> fatGetDirEntry(<span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> entry);
00381 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> fatChangeDirectory(<span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> entry);
00382 <span class="keywordtype">void</span> fatPrintDirEntry(<span class="keywordtype">void</span>);
00383 <span class="keywordtype">void</span> fatDumpDirSlot(<span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> entry);
00384 <span class="keyword">struct </span>FileInfoStruct* fatGetFileInfo(<span class="keywordtype">void</span>);
00385 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> fatGetFilesize(<span class="keywordtype">void</span>);
00386 <span class="keywordtype">char</span>* fatGetFilename(<span class="keywordtype">void</span>);
00387 <span class="keywordtype">char</span>* fatGetDirname(<span class="keywordtype">void</span>);
00388 <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);
00389 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> fatNextCluster(<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> cluster);
00390 
00391 <span class="preprocessor">#endif</span>
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