mmc_8c-source.html

MP3播放器源代码, VS1003B

00376     <a class="code" href="board_8h.html#a45">SPIPutCharWithoutWaiting</a>(0xff);
00377     <a class="code" href="board_8h.html#a43">SPIWait</a>();
00378     *<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++=<a class="code" href="board_8h.html#a46">SPI_RESULT_BYTE</a>;
00379     <a class="code" href="board_8h.html#a45">SPIPutCharWithoutWaiting</a>(0xff);
00380     <a class="code" href="board_8h.html#a43">SPIWait</a>();
00381     *<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++=<a class="code" href="board_8h.html#a46">SPI_RESULT_BYTE</a>;
00382     <a class="code" href="board_8h.html#a45">SPIPutCharWithoutWaiting</a>(0xff);
00383     <a class="code" href="board_8h.html#a43">SPIWait</a>();
00384     *<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++=<a class="code" href="board_8h.html#a46">SPI_RESULT_BYTE</a>;
00385     <a class="code" href="board_8h.html#a45">SPIPutCharWithoutWaiting</a>(0xff);
00386     <a class="code" href="board_8h.html#a43">SPIWait</a>();
00387     *<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++=<a class="code" href="board_8h.html#a46">SPI_RESULT_BYTE</a>;
00388   }
00389 
00390 <span class="preprocessor">#ifdef MMCDEBUG</span>
00391 <span class="preprocessor"></span>    ConsoleWrite(<span class="stringliteral">"R&gt;"</span>);
00392 <span class="preprocessor">#endif</span>
00393 <span class="preprocessor"></span>
00394 }
00395 
<a name="l00397"></a><a class="code" href="mmc_8c.html#a7">00397</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){
00398 
00399     ConsoleWrite (<span class="stringliteral">"\rSeek failed, MMC returns "</span>);
00400     ConsolePutHex8 (c);
00401     ConsoleWrite (<span class="stringliteral">"h ("</span>);
00402         
00403     <span class="keywordflow">if</span> (c&amp;128) ConsoleWrite(<span class="stringliteral">"which is NOT an R1 response!!"</span>);
00404     <span class="keywordflow">else</span>{
00405       <span class="keywordflow">if</span> (c&amp;64) ConsoleWrite(<span class="stringliteral">"ParameterError "</span>);
00406       <span class="keywordflow">if</span> (c&amp;32) ConsoleWrite(<span class="stringliteral">"AddressError "</span>);
00407       <span class="keywordflow">if</span> (c&amp;16) ConsoleWrite(<span class="stringliteral">"EraseSequenceError "</span>);
00408       <span class="keywordflow">if</span> (c&amp;8) ConsoleWrite(<span class="stringliteral">"CommandCrcError "</span>);
00409       <span class="keywordflow">if</span> (c&amp;4) ConsoleWrite(<span class="stringliteral">"IllegalCommandCode "</span>);
00410       <span class="keywordflow">if</span> (c&amp;2) ConsoleWrite(<span class="stringliteral">"EraseCancelled "</span>);
00411       <span class="keywordflow">if</span> (c&amp;1) ConsoleWrite(<span class="stringliteral">"Idle "</span>);
00412     }
00413     
00414     ConsoleWrite (<span class="stringliteral">") for sector "</span>);
00415     ConsolePutUInt (<a class="code" href="buffer_8c.html#a2">sectorAddress</a>.<a class="code" href="unionAddress.html#o0">l</a>);
00416     ConsoleWrite(<span class="stringliteral">".\rFurther reading data returns: \r"</span>);
00417     <span class="keywordflow">for</span> (c=0; c&lt;255; c++){
00418       ConsolePutHex8(<a class="code" href="board_8c.html#a1">SPIGetChar</a>());     
00419     }
00420     ConsolePutChar(13);
00421     <span class="keywordflow">while</span> (!<a class="code" href="board_8h.html#a14">KEY_BUTTON</a>);
00422 
00423 
00424 }
00425 
00426 
00427 
<a name="l00431"></a><a class="code" href="mmc_8h.html#a2">00431</a> <a class="code" href="board_8h.html#a47">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   <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> c, retries;
00433 
00434   retries = 0;
00435   <span class="keywordflow">do</span>{
00436     retries++;
00437     <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>
00438     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>,
00439                  <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);
00440     <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>
00441 
00442     <span class="comment">// If MMC works properly, it returns Busy (== Not idle) at this stage.    </span>
00443     <span class="keywordflow">if</span> (c!=0x00){
00444       <span class="keywordflow">if</span> (c != 0xff){ 
00445         <span class="comment">//MMC returns something else than Busy or "Idle Bus", print what it is</span>
00446         <a class="code" href="mmc_8c.html#a7">ConsoleDecipherMMCResponse</a>(c);
00447       }
00448       <span class="comment">// Something is wrong, take the standard action...</span>
00449       <a class="code" href="mmc_8c.html#a4">RebootMMC</a>();
00450       <span class="keywordflow">if</span> (retries &gt; 10){  
00451         <span class="keywordflow">return</span> 7; <span class="comment">/* failed to execute mmc command */</span>
00452       }
00453     }
00454   }<span class="keywordflow">while</span>(c!=0x00); <span class="comment">//repeat until we get busy signal from MMC.</span>
00455     
00456   <a class="code" href="board_8h.html#a33">MMCDeselect</a>();
00457   
00458   <span class="keywordflow">return</span> 0; <span class="comment">//ok return</span>
00459 }
00460 
00461 
00462 <span class="comment">/* Wait for data start token and read 512 bytes to global buffer */</span>
<a name="l00463"></a><a class="code" href="mmc_8h.html#a3">00463</a> <a class="code" href="board_8h.html#a47">Public</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="mmc_8c.html#a9">ReadPhysicalSector</a>(){
00464 
00465   <span class="comment">// RED_LED = LED_ON; /* Disk Read LED on */</span>
00466 
00467   <a class="code" href="board_8h.html#a32">MMCSelect</a>();
00468   <a class="code" href="mmc_8c.html#a1">MmcWaitForData</a>();
00469   <a class="code" href="mmc_8c.html#a6">PerformBlockRead</a>();
00470 
00471   <span class="comment">/* generate SPI clock edges to finish up the command */</span>
00472 
00473   <a class="code" href="board_8h.html#a50">SPI8Clocks</a>(4); <span class="comment">//Send 8*4=32 clocks (4 ff's) to MMC to be nice.</span>
00474   <a class="code" href="board_8h.html#a33">MMCDeselect</a>();
00475   <a class="code" href="board_8h.html#a50">SPI8Clocks</a>(4); <span class="comment">//Again, give the poor MMC some clocks, it likes them.</span>
00476 
00477   <span class="comment">//RED_LED = LED_OFF; /* Disk Read LED off */</span>
00478 
00479   <span class="keywordflow">return</span> 0; <span class="comment">//ok return</span>
00480 }
00481 
00482 
<a name="l00484"></a><a class="code" href="mmc_8h.html#a4">00484</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="mmc_8c.html#a10">WritePhysicalSector</a>(){
00485   <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> c;  
00486 
00487 <span class="preprocessor">#ifdef MMCDEBUG</span>
00488 <span class="preprocessor"></span>  ConsoleWrite(<span class="stringliteral">"&lt;W"</span>);
00489 <span class="preprocessor">#endif  </span>
00490 <span class="preprocessor"></span>
00491 
00492   <span class="comment">//RED_LED = LED_ON;</span>
00493   <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>
00494   c=<a class="code" href="mmc_8c.html#a0">MmcCommand</a>(0x40 | 24, <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>,
00495                <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);
00496   <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>
00497 
00498   <span class="comment">//ConsolePutChar('w');</span>
00499   <span class="comment">//ConsolePutHex8(c);</span>
00500   
00501   <span class="keywordflow">if</span> (c!=0x00) <span class="keywordflow">return</span> (c); <span class="comment">//Error - MMC did not go to write mode</span>
00502   
00503 <span class="comment">/*</span>
00504 <span class="comment">  while (c!=0x00) { //wait for BUSY token, if you get 0x01(idle), it's an ERROR!</span>
00505 <span class="comment">    c = SPIGetChar();</span>
00506 <span class="comment">    ConsolePutHex8(c);</span>
00507 <span class="comment">  }      </span>
00508 <span class="comment">*/</span>  
00509   <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>;
00510   <a class="code" href="board_8h.html#a45">SPIPutCharWithoutWaiting</a>(0xFE);
00511   <a class="code" href="board_8h.html#a43">SPIWait</a>();
00512   
00513   <span class="keywordflow">for</span> (c=0;c&lt;128;c++){
00514     <a class="code" href="board_8h.html#a45">SPIPutCharWithoutWaiting</a>(*<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++);   
00515     <a class="code" href="board_8h.html#a43">SPIWait</a>();
00516     <a class="code" href="board_8h.html#a45">SPIPutCharWithoutWaiting</a>(*<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++);   
00517     <a class="code" href="board_8h.html#a43">SPIWait</a>();
00518     <a class="code" href="board_8h.html#a45">SPIPutCharWithoutWaiting</a>(*<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++);   
00519     <a class="code" href="board_8h.html#a43">SPIWait</a>();
00520     <a class="code" href="board_8h.html#a45">SPIPutCharWithoutWaiting</a>(*<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++);   
00521     <a class="code" href="board_8h.html#a43">SPIWait</a>();
00522   }
00523   <span class="comment">//ConsolePutChar('-');</span>
00524 
00525   c = <a class="code" href="board_8c.html#a1">SPIGetChar</a>();  <span class="comment">//crc 1st byte (sends 0xff)</span>
00526   c = <a class="code" href="board_8c.html#a1">SPIGetChar</a>(); <span class="comment">//crc 2nd byte (sends 0xff)</span>
00527   c = <a class="code" href="board_8c.html#a1">SPIGetChar</a>();
00528   <span class="comment">//ConsolePutHex8(c); //This prints xxx00101, (usually e5) when data ok</span>
00529   
00530 <span class="comment">//  while (SPIGetChar()!=0xff)      //busy wait moved to mmcCommand</span>
00531 <span class="comment">//    ; // Wait until MMC not busy.     </span>
00532 
00533 <span class="preprocessor">#ifdef MMCDEBUG</span>
00534 <span class="preprocessor"></span>  ConsoleWrite(<span class="stringliteral">"W&gt;"</span>);
00535 <span class="preprocessor">#endif  </span>
00536 <span class="preprocessor"></span>
00537   
00538   <a class="code" href="board_8h.html#a50">SPI8Clocks</a>(16);
00539   <a class="code" href="board_8h.html#a33">MMCDeselect</a>();
00540   <a class="code" href="board_8h.html#a50">SPI8Clocks</a>(16);
00541 
00542   <span class="comment">//RED_LED = LED_OFF;</span>
00543 
00544   <span class="keywordflow">return</span> 0;
00545 }
00546 
00547 
</div></pre><hr>
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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]
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