mmc_8c-source.html

MP3 Player Source Code

00378     <a class="code" href="board_8h.html#a43">SPIPutCharWithoutWaiting</a>(0xff);
00379     <a class="code" href="board_8h.html#a41">SPIWait</a>();
00380     *<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++=<a class="code" href="board_8h.html#a44">SPI_RESULT_BYTE</a>;
00381     <a class="code" href="board_8h.html#a43">SPIPutCharWithoutWaiting</a>(0xff);
00382     <a class="code" href="board_8h.html#a41">SPIWait</a>();
00383     *<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++=<a class="code" href="board_8h.html#a44">SPI_RESULT_BYTE</a>;
00384     <a class="code" href="board_8h.html#a43">SPIPutCharWithoutWaiting</a>(0xff);
00385     <a class="code" href="board_8h.html#a41">SPIWait</a>();
00386     *<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++=<a class="code" href="board_8h.html#a44">SPI_RESULT_BYTE</a>;
00387     <a class="code" href="board_8h.html#a43">SPIPutCharWithoutWaiting</a>(0xff);
00388     <a class="code" href="board_8h.html#a41">SPIWait</a>();
00389     *<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++=<a class="code" href="board_8h.html#a44">SPI_RESULT_BYTE</a>;
00390   }
00391 
00392 <span class="preprocessor">#ifdef MMCDEBUG</span>
00393 <span class="preprocessor"></span>    ConsoleWrite(<span class="stringliteral">"R&gt;"</span>);
00394 <span class="preprocessor">#endif</span>
00395 <span class="preprocessor"></span>
00396 }
00397 
<a name="l00399"></a><a class="code" href="mmc_8c.html#a7">00399</a> <span class="keywordtype">void</span> <a class="code" href="mmc_8c.html#a7">ConsoleDecipherMMCResponse</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> c){
00400 
00401     ConsoleWrite (<span class="stringliteral">"\rSeek failed, MMC returns "</span>);
00402     ConsolePutHex8 (c);
00403     ConsoleWrite (<span class="stringliteral">"h ("</span>);
00404         
00405     <span class="keywordflow">if</span> (c&amp;128) ConsoleWrite(<span class="stringliteral">"which is NOT an R1 response!!"</span>);
00406     <span class="keywordflow">else</span>{
00407       <span class="keywordflow">if</span> (c&amp;64) ConsoleWrite(<span class="stringliteral">"ParameterError "</span>);
00408       <span class="keywordflow">if</span> (c&amp;32) ConsoleWrite(<span class="stringliteral">"AddressError "</span>);
00409       <span class="keywordflow">if</span> (c&amp;16) ConsoleWrite(<span class="stringliteral">"EraseSequenceError "</span>);
00410       <span class="keywordflow">if</span> (c&amp;8) ConsoleWrite(<span class="stringliteral">"CommandCrcError "</span>);
00411       <span class="keywordflow">if</span> (c&amp;4) ConsoleWrite(<span class="stringliteral">"IllegalCommandCode "</span>);
00412       <span class="keywordflow">if</span> (c&amp;2) ConsoleWrite(<span class="stringliteral">"EraseCancelled "</span>);
00413       <span class="keywordflow">if</span> (c&amp;1) ConsoleWrite(<span class="stringliteral">"Idle "</span>);
00414     }
00415     
00416     ConsoleWrite (<span class="stringliteral">") for sector "</span>);
00417     ConsolePutUInt (<a class="code" href="buffer_8c.html#a2">sectorAddress</a>.<a class="code" href="unionAddress.html#o0">l</a>);
00418     ConsoleWrite(<span class="stringliteral">".\rFurther reading data returns: \r"</span>);
00419     <span class="keywordflow">for</span> (c=0; c&lt;255; c++){
00420       ConsolePutHex8(<a class="code" href="board_8c.html#a1">SPIGetChar</a>());     
00421     }
00422     ConsolePutChar(13);
00423     <span class="keywordflow">while</span> (!<a class="code" href="board_8h.html#a14">KEY_BUTTON</a>);
00424 
00425 
00426 }
00427 
00428 
00429 
00430 <span class="comment">/* Unconditionally (really just do it!) seek MMC at offset sectorN*512 */</span>
<a name="l00431"></a><a class="code" href="mmc_8h.html#a2">00431</a> <a class="code" href="board_8h.html#a45">Public</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="mmc_8h.html#a2">SeekSector</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> sectorN){
00432   
00433   <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> c;
00434   
00435 <span class="preprocessor">#ifdef MMCDEBUG    </span>
00436 <span class="preprocessor"></span>  ConsoleWrite(<span class="stringliteral">"{s"</span>); <span class="comment">//Seek called</span>
00437 <span class="preprocessor">#endif</span>
00438 <span class="preprocessor"></span>
00439   <span class="keywordflow">do</span>{
00440     <a class="code" href="buffer_8c.html#a2">sectorAddress</a>.<a class="code" href="unionAddress.html#o0">l</a> = sectorN * 2; <span class="comment">//convert to bytes (combined with 8bit shift)</span>
00441     c=<a class="code" href="mmc_8c.html#a0">MmcCommand</a>(0x51,<a class="code" href="buffer_8c.html#a2">sectorAddress</a>.<a class="code" href="unionAddress.html#o1">b</a>.<a class="code" href="structAddress_1_1B.html#o2">b2</a>,<a class="code" href="buffer_8c.html#a2">sectorAddress</a>.<a class="code" href="unionAddress.html#o1">b</a>.<a class="code" href="structAddress_1_1B.html#o1">b1</a>,
00442                  <a class="code" href="buffer_8c.html#a2">sectorAddress</a>.<a class="code" href="unionAddress.html#o1">b</a>.<a class="code" href="structAddress_1_1B.html#o0">b0</a>, 0);
00443     <a class="code" href="buffer_8c.html#a2">sectorAddress</a>.<a class="code" href="unionAddress.html#o0">l</a> = <a class="code" href="buffer_8c.html#a2">sectorAddress</a>.<a class="code" href="unionAddress.html#o0">l</a> &gt;&gt; 1; <span class="comment">//convert back to blocks</span>
00444 
00445     <span class="comment">//if MMC returs "nothing" (0xff) or 0x81(busy), </span>
00446     <span class="comment">//toggle chip select and retry</span>
00447     <span class="keywordflow">if</span> ((c==0xff)||(c==0x81)){
00448       c=0xff;
00449       <a class="code" href="mmc_8c.html#a4">RebootMMC</a>();
00450     }
00451     <span class="keywordflow">if</span> (c==0x01){ <span class="comment">//MMC says "busy"</span>
00452       c=0xff; <span class="comment">//try again</span>
00453     }
00454 
00455   }<span class="keywordflow">while</span>(c==0xff); <span class="comment">//repeat until we get signal from MMC.</span>
00456   
00457   <span class="keywordflow">if</span> ((c &amp; 0xfe)){ <span class="comment">//MMC returns something else than idle or busy signal</span>
00458     <a class="code" href="mmc_8c.html#a7">ConsoleDecipherMMCResponse</a>(c);
00459     <a class="code" href="board_8h.html#a29">MMC_XCS</a> = <a class="code" href="board_8h.html#a31">MMC_NOT_SELECTED</a>;
00460 
00461 <span class="preprocessor">#ifdef MMCDEBUG</span>
00462 <span class="preprocessor"></span>    ConsoleWrite(<span class="stringliteral">"!s}"</span>);
00463 <span class="preprocessor">#endif</span>
00464 <span class="preprocessor"></span>    <span class="keywordflow">return</span> 7; <span class="comment">/* failed to execute mmc command */</span>
00465   }
00466   
00467   <a class="code" href="board_8h.html#a29">MMC_XCS</a> = <a class="code" href="board_8h.html#a31">MMC_NOT_SELECTED</a>;
00468   
00469 <span class="preprocessor">#ifdef MMCDEBUG</span>
00470 <span class="preprocessor"></span>  ConsoleWrite(<span class="stringliteral">"s}"</span>);
00471 <span class="preprocessor">#endif</span>
00472 <span class="preprocessor"></span>  <span class="keywordflow">return</span> 0; <span class="comment">//ok return</span>
00473 }
00474 
00475 
00476 <span class="comment">/* Wait for data start token and read 512 bytes to global buffer */</span>
<a name="l00477"></a><a class="code" href="mmc_8h.html#a3">00477</a> <a class="code" href="board_8h.html#a45">Public</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="mmc_8c.html#a9">ReadPhysicalSector</a>(){
00478 
00479   <a class="code" href="board_8h.html#a10">RED_LED</a> = <a class="code" href="board_8h.html#a12">LED_ON</a>; <span class="comment">/* Disk Read LED on */</span>
00480 
00481   <a class="code" href="board_8h.html#a29">MMC_XCS</a> = <a class="code" href="board_8h.html#a30">MMC_SELECTED</a>;
00482   <span class="comment">//ConsoleWrite("&lt;wait&gt;");</span>
00483   <a class="code" href="mmc_8c.html#a1">MmcWaitForData</a>();
00484   
00485   <span class="comment">//ConsoleWrite("&lt;read&gt;");</span>
00486   <a class="code" href="mmc_8c.html#a6">PerformBlockRead</a>();
00487 
00488   <span class="comment">//ConsoleWrite("&lt;deselect&gt;");</span>
00489   <span class="comment">/* generate SPI clock edges to finish up the command */</span>
00490 
00491   <a class="code" href="board_8h.html#a48">SPI8Clocks</a>(4); <span class="comment">//Send 8*4=32 clocks (4 ff's) to MMC to be nice.</span>
00492   <a class="code" href="board_8h.html#a29">MMC_XCS</a> = <a class="code" href="board_8h.html#a31">MMC_NOT_SELECTED</a>;
00493   <a class="code" href="board_8h.html#a48">SPI8Clocks</a>(4); <span class="comment">//Again, give the poor MMC some clocks, it likes them.</span>
00494 
00495   <a class="code" href="board_8h.html#a10">RED_LED</a> = <a class="code" href="board_8h.html#a13">LED_OFF</a>; <span class="comment">/* Disk Read LED off */</span>
00496 
00497   <span class="keywordflow">return</span> 0; <span class="comment">//ok return</span>
00498 }
00499 
00500 
<a name="l00502"></a><a class="code" href="mmc_8h.html#a4">00502</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="mmc_8c.html#a10">WritePhysicalSector</a>(){
00503   <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> c;  
00504 
00505 <span class="preprocessor">#ifdef MMCDEBUG</span>
00506 <span class="preprocessor"></span>  ConsoleWrite(<span class="stringliteral">"&lt;W"</span>);
00507 <span class="preprocessor">#endif  </span>
00508 <span class="preprocessor"></span>
00509   <a class="code" href="board_8h.html#a10">RED_LED</a> = <a class="code" href="board_8h.html#a12">LED_ON</a>;
00510   <a class="code" href="buffer_8c.html#a2">sectorAddress</a>.<a class="code" href="unionAddress.html#o0">l</a> = <a class="code" href="buffer_8c.html#a2">sectorAddress</a>.<a class="code" href="unionAddress.html#o0">l</a> * 2; <span class="comment">//convert to bytes (combined with 8bit shift)</span>
00511   c=<a class="code" href="mmc_8c.html#a0">MmcCommand</a>(24 | 0x40 ,<a class="code" href="buffer_8c.html#a2">sectorAddress</a>.<a class="code" href="unionAddress.html#o1">b</a>.<a class="code" href="structAddress_1_1B.html#o2">b2</a>,<a class="code" href="buffer_8c.html#a2">sectorAddress</a>.<a class="code" href="unionAddress.html#o1">b</a>.<a class="code" href="structAddress_1_1B.html#o1">b1</a>,
00512                <a class="code" href="buffer_8c.html#a2">sectorAddress</a>.<a class="code" href="unionAddress.html#o1">b</a>.<a class="code" href="structAddress_1_1B.html#o0">b0</a>, 0);
00513   <a class="code" href="buffer_8c.html#a2">sectorAddress</a>.<a class="code" href="unionAddress.html#o0">l</a> = <a class="code" href="buffer_8c.html#a2">sectorAddress</a>.<a class="code" href="unionAddress.html#o0">l</a> &gt;&gt; 1; <span class="comment">//convert back to blocks</span>
00514   <a class="code" href="board_8h.html#a29">MMC_XCS</a> = <a class="code" href="board_8h.html#a30">MMC_SELECTED</a>;
00515 
00516  
00517   <a class="code" href="buffer_8c.html#a1">dataBufPtr</a> = <a class="code" href="buffer_8c.html#a0">diskSect</a>.<a class="code" href="unionDiskBlock.html#o1">raw</a>.<a class="code" href="structDiskBlock_1_1Raw.html#o0">buf</a>;
00518   <a class="code" href="board_8h.html#a43">SPIPutCharWithoutWaiting</a>(0xFE);
00519   <a class="code" href="board_8h.html#a41">SPIWait</a>();
00520   
00521   <span class="keywordflow">for</span> (c=0;c&lt;128;c++){
00522     <a class="code" href="board_8h.html#a43">SPIPutCharWithoutWaiting</a>(*<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++);   
00523     <a class="code" href="board_8h.html#a41">SPIWait</a>();
00524     <a class="code" href="board_8h.html#a43">SPIPutCharWithoutWaiting</a>(*<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++);   
00525     <a class="code" href="board_8h.html#a41">SPIWait</a>();
00526     <a class="code" href="board_8h.html#a43">SPIPutCharWithoutWaiting</a>(*<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++);   
00527     <a class="code" href="board_8h.html#a41">SPIWait</a>();
00528     <a class="code" href="board_8h.html#a43">SPIPutCharWithoutWaiting</a>(*<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++);   
00529     <a class="code" href="board_8h.html#a41">SPIWait</a>();
00530   }
00531 
00532   <a class="code" href="mmc_8c.html#a1">MmcWaitForData</a>(); <span class="comment">//Wait for 0xFE token</span>
00533   <span class="keywordflow">while</span> (<a class="code" href="board_8c.html#a1">SPIGetChar</a>()==0) 
00534     ; <span class="comment">// Wait until MMC not busy.     </span>
00535 
00536 <span class="preprocessor">#ifdef MMCDEBUG</span>
00537 <span class="preprocessor"></span>  ConsoleWrite(<span class="stringliteral">"W&gt;"</span>);
00538 <span class="preprocessor">#endif  </span>
00539 <span class="preprocessor"></span>
00540   
00541   <a class="code" href="board_8h.html#a48">SPI8Clocks</a>(16);
00542   <a class="code" href="board_8h.html#a29">MMC_XCS</a> = <a class="code" href="board_8h.html#a31">MMC_NOT_SELECTED</a>;
00543   <a class="code" href="board_8h.html#a48">SPI8Clocks</a>(16);
00544 
00545   <a class="code" href="board_8h.html#a10">RED_LED</a> = <a class="code" href="board_8h.html#a13">LED_OFF</a>;
00546 
00547 }
00548 
00549 
</div></pre><hr>
<FONT SIZE="-1">
All software copyright 2000-2004 <a href="http://www.vlsi.fi/"> VLSI Solution OY.</a>
Redistribution of these software modules are limited to promotional use only
and only with the VS1011 / VS1002 / VS1003  MP3-Evakit evaluation boards. Free or
commercial use of these software modules in MP3 players is ok if the
product includes MP3 decoder chip(s) from VLSI. You can request the complete
(compilable) package from [e-mail]
</FONT>