mmc_8c-source.html

MP3 Player Source Code

00194   ConsolePutChar(<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>[7]);
00195   ConsolePutChar(<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>[8]);
00196   ConsoleWrite(<span class="stringliteral">" Production date: "</span>);
00197   ConsolePutUInt(<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>[14]&gt;&gt;4);
00198   ConsoleWrite(<span class="stringliteral">"/ "</span>);
00199   ConsolePutUInt((<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>[14]&amp;0x0f)+1997);
00200   ConsolePutChar(<span class="charliteral">'\r'</span>);
00201   ConsoleWrite(<span class="stringliteral">"Media serial number: "</span>);
00202   ConsolePutHex8(<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>[10]);
00203   ConsolePutHex8(<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>[11]);
00204   ConsolePutHex8(<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>[12]);
00205   ConsolePutHex8(<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>[13]);
00206   ConsolePutChar(<span class="charliteral">'\r'</span>);
00207   
00208   <span class="comment">/* print out card ident register</span>
00209 <span class="comment">  for (c=0; c&lt;30; c++){</span>
00210 <span class="comment">    if ((c&amp;0x03)==0) ConsolePutChar(' ');</span>
00211 <span class="comment">    ConsolePutHex8(diskSect.raw.buf[c]);</span>
00212 <span class="comment">  }</span>
00213 <span class="comment">  */</span>
00214 
00215   <span class="keywordflow">return</span> 0; <span class="comment">/* All OK return */</span>
00216 }
00217 
00218 
00219 
<a name="l00221"></a><a class="code" href="mmc_8c.html#a4">00221</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="mmc_8c.html#a4">RebootMMC</a>(){
00222   <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> c;
00223 
00224   <span class="comment">//Try (indefinitely) to switch on the MMC card</span>
00225   <span class="keywordflow">do</span>{
00226     <span class="comment">/* MMC Don't use CRC - seems to be required by some MMC cards? */</span>
00227     <a class="code" href="mmc_8c.html#a0">MmcCommand</a>(0x7B,0,0,0,0);
00228     <span class="comment">/* MMC Init, command 0x40 should return 0x01 (idle) if all is ok. */</span>
00229   }<span class="keywordflow">while</span> (<a class="code" href="mmc_8c.html#a0">MmcCommand</a>(0x40,0,0,0,0)!=0x01);
00230   <span class="comment">// 0x01(idle) response detected.</span>
00231   
00232   ConsoleWrite(<span class="stringliteral">"Card found, starting... "</span>);
00233   <span class="comment">/*Try max 255 times MMC Wake-up call: set to Not Idle (mmc returns 0x00)*/</span>
00234   c=255;
00235   <span class="keywordflow">while</span> ((c--)&amp;&amp;(<a class="code" href="mmc_8c.html#a0">MmcCommand</a>(0x41,0,0,0,16))){
00236     <a class="code" href="board_8h.html#a49">Delay</a>(10);
00237     <span class="keywordflow">if</span> (c==1){
00238       <span class="comment">//timeout</span>
00239       ConsoleWrite(<span class="stringliteral">"Failed.\r"</span>);
00240       <span class="keywordflow">return</span> 2; <span class="comment">/* Not able to power up mmc */</span>
00241     }
00242   }
00243 
00244   ConsoleWrite(<span class="stringliteral">"Ok.\r"</span>);
00245   <span class="keywordflow">return</span> 0;
00246 }
00247 
00248 
<a name="l00249"></a><a class="code" href="mmc_8h.html#a1">00249</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#a5">InitMMC</a>(){
00250   <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> c;
00251 
00252   <span class="comment">//Switch off the MMC power supply</span>
00253   <a class="code" href="board_8h.html#a28">MMC_OFF</a> = <a class="code" href="board_8h.html#a26">YES</a>; 
00254   ConsoleWrite (<span class="stringliteral">"Init: MMC\r"</span>);
00255   <a class="code" href="board_8h.html#a49">Delay</a>(100);
00256 
00257   <span class="comment">//Switch on the MMC power supply</span>
00258   <a class="code" href="board_8h.html#a28">MMC_OFF</a> = <a class="code" href="board_8h.html#a27">NO</a>;
00259   <a class="code" href="board_8h.html#a49">Delay</a>(100);
00260 
00261   <span class="comment">/* Allow MMC some time and clock cycles to reset */</span>
00262   <span class="keywordflow">for</span> (c=0; c&lt;200; c++){    
00263     <a class="code" href="board_8h.html#a43">SPIPutCharWithoutWaiting</a>(0xff);
00264     <a class="code" href="board_8h.html#a41">SPIWait</a>();
00265   }
00266   <a class="code" href="board_8h.html#a49">Delay</a>(20);
00267 
00268   <span class="keywordflow">if</span> (<a class="code" href="mmc_8c.html#a4">RebootMMC</a>()) <span class="keywordflow">return</span> 1; <span class="comment">//not able to powerup;</span>
00269   <span class="comment">//An existing MMC card should be able to respond now.</span>
00270 
00271   <a class="code" href="mmc_8c.html#a3">GetStorageInformation</a>();
00272   
00273   <span class="comment">/* Set Block Size of 512 bytes (2 == 512 &lt;&lt; 8) */</span>
00274   <span class="keywordflow">if</span> ((c=<a class="code" href="mmc_8c.html#a0">MmcCommand</a>(0x50,0,0,2,0))) <span class="keywordflow">return</span> c|0x80; <span class="comment">/* blocksize error */</span>
00275   
00276   ConsoleWrite(<span class="stringliteral">"Scanning storage... "</span>);
00277 
00278   <span class="comment">/* Check if MMC supports interrupted data transfer */</span>
00279   <span class="comment">/* This does a simple checksum check to see if interrupted and </span>
00280 <span class="comment">   * non-interrupted read blocks are the same. */</span>
00281   <span class="comment">/* This could be a function, so it is in braces for clarity purposes */</span>
00282   {  
00283     <span class="keywordflow">if</span> (<a class="code" href="mmc_8h.html#a2">SeekSector</a>(0)) <span class="keywordflow">return</span> 2; <span class="comment">//Storage powerup failure    </span>
00284     <span class="keywordflow">if</span> (<a class="code" href="mmc_8c.html#a9">ReadPhysicalSector</a>()) <span class="keywordflow">return</span> 2; <span class="comment">//Storage powerup failure</span>
00285 
00286     <a class="code" href="board_8c.html#a0">temp</a>.<a class="code" href="unionTemp.html#o1">i</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>[511];
00287     <span class="keywordflow">for</span> (c=0; c&lt;250; c++){
00288       <a class="code" href="board_8c.html#a0">temp</a>.<a class="code" href="unionTemp.html#o1">i</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>[c];
00289     }
00290     
00291     ConsoleWrite(<span class="stringliteral">"Testing for seek mode..."</span>);
00292     <span class="keywordflow">if</span> (<a class="code" href="mmc_8h.html#a2">SeekSector</a>(0)) <span class="keywordflow">return</span> 2;<span class="comment">//Storage powerup failure</span>
00293     
00294     <span class="comment">/* Send some extra SPI clocks */</span>
00295     <a class="code" href="board_8h.html#a29">MMC_XCS</a> = <a class="code" href="board_8h.html#a31">MMC_NOT_SELECTED</a>;
00296     <a class="code" href="board_8h.html#a43">SPIPutCharWithoutWaiting</a>(0xff);
00297     <span class="keywordflow">for</span> (c=0; c&lt;100; c++){
00298       <a class="code" href="board_8h.html#a42">SPIPutChar</a>(0xff);
00299     }
00300     <a class="code" href="board_8h.html#a41">SPIWait</a>();
00301 
00302     <span class="keywordflow">if</span> (<a class="code" href="mmc_8c.html#a9">ReadPhysicalSector</a>()){
00303       ConsoleWrite(<span class="stringliteral">"Interrupted read failed.\r"</span>);
00304       ConsoleWrite(<span class="stringliteral">"Using compatibility mode.\r"</span>);
00305       <span class="keywordflow">return</span> 0x0e; <span class="comment">//ok but no support for seek-before-read</span>
00306       
00307     }<span class="keywordflow">else</span>{      
00308       <span class="comment">//Check if received data was same</span>
00309       <a class="code" href="board_8c.html#a0">temp</a>.<a class="code" href="unionTemp.html#o1">i</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>[511];
00310       <span class="keywordflow">for</span> (c=0; c&lt;250; c++){
00311         <a class="code" href="board_8c.html#a0">temp</a>.<a class="code" href="unionTemp.html#o1">i</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>[c];
00312       }
00313     }
00314     
00315     <span class="keywordflow">if</span> (<a class="code" href="board_8c.html#a0">temp</a>.<a class="code" href="unionTemp.html#o1">i</a>) { <span class="comment">/* Checksum does not match */</span>
00316       ConsoleWrite(<span class="stringliteral">"This MMC has no support for interrupted read. "</span>);
00317       ConsoleWrite(<span class="stringliteral">"Using compatibility mode.\r"</span>);
00318       <span class="keywordflow">return</span> 0x0e; <span class="comment">//ok but no support for seek-before-read</span>
00319     }
00320     
00321     ConsoleWrite(<span class="stringliteral">"\rInitMMC ok.\r"</span>);
00322   }
00323 
00324   <span class="comment">/* All OK return */</span>
00325   <span class="keywordflow">return</span> 0; <span class="comment">//ok and MMC supports seek-before-read</span>
00326 
00327 }
00328 
00329 
<a name="l00332"></a><a class="code" href="mmc_8c.html#a6">00332</a> <span class="keywordtype">void</span> <a class="code" href="mmc_8c.html#a6">PerformBlockRead</a>(){
00333 
00334 <span class="preprocessor">#ifdef MMCDEBUG</span>
00335 <span class="preprocessor"></span>  ConsoleWrite(<span class="stringliteral">"&lt;R"</span>); <span class="comment">//Actual Read</span>
00336 <span class="preprocessor">#endif</span>
00337 <span class="preprocessor"></span>
00338   <span class="comment">/* Use shared global buffer pointer for speed*/</span>
00339   <span class="comment">/* Loop unrolled 16 times for SPEED! :) */</span>
00340   <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>;
00341   <span class="keywordflow">while</span> (<a class="code" href="buffer_8c.html#a1">dataBufPtr</a> &lt; <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>+512){
00342     <a class="code" href="board_8h.html#a43">SPIPutCharWithoutWaiting</a>(0xff);
00343     <a class="code" href="board_8h.html#a41">SPIWait</a>();
00344     *<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++=<a class="code" href="board_8h.html#a44">SPI_RESULT_BYTE</a>;
00345     <a class="code" href="board_8h.html#a43">SPIPutCharWithoutWaiting</a>(0xff);
00346     <a class="code" href="board_8h.html#a41">SPIWait</a>();
00347     *<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++=<a class="code" href="board_8h.html#a44">SPI_RESULT_BYTE</a>;
00348     <a class="code" href="board_8h.html#a43">SPIPutCharWithoutWaiting</a>(0xff);
00349     <a class="code" href="board_8h.html#a41">SPIWait</a>();
00350     *<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++=<a class="code" href="board_8h.html#a44">SPI_RESULT_BYTE</a>;
00351     <a class="code" href="board_8h.html#a43">SPIPutCharWithoutWaiting</a>(0xff);
00352     <a class="code" href="board_8h.html#a41">SPIWait</a>();
00353     *<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++=<a class="code" href="board_8h.html#a44">SPI_RESULT_BYTE</a>;
00354     <a class="code" href="board_8h.html#a43">SPIPutCharWithoutWaiting</a>(0xff);
00355     <a class="code" href="board_8h.html#a41">SPIWait</a>();
00356     *<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++=<a class="code" href="board_8h.html#a44">SPI_RESULT_BYTE</a>;
00357     <a class="code" href="board_8h.html#a43">SPIPutCharWithoutWaiting</a>(0xff);
00358     <a class="code" href="board_8h.html#a41">SPIWait</a>();
00359     *<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++=<a class="code" href="board_8h.html#a44">SPI_RESULT_BYTE</a>;
00360     <a class="code" href="board_8h.html#a43">SPIPutCharWithoutWaiting</a>(0xff);
00361     <a class="code" href="board_8h.html#a41">SPIWait</a>();
00362     *<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++=<a class="code" href="board_8h.html#a44">SPI_RESULT_BYTE</a>;
00363     <a class="code" href="board_8h.html#a43">SPIPutCharWithoutWaiting</a>(0xff);
00364     <a class="code" href="board_8h.html#a41">SPIWait</a>();
00365     *<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++=<a class="code" href="board_8h.html#a44">SPI_RESULT_BYTE</a>;
00366     <a class="code" href="board_8h.html#a43">SPIPutCharWithoutWaiting</a>(0xff);
00367     <a class="code" href="board_8h.html#a41">SPIWait</a>();
00368     *<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++=<a class="code" href="board_8h.html#a44">SPI_RESULT_BYTE</a>;
00369     <a class="code" href="board_8h.html#a43">SPIPutCharWithoutWaiting</a>(0xff);
00370     <a class="code" href="board_8h.html#a41">SPIWait</a>();
00371     *<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++=<a class="code" href="board_8h.html#a44">SPI_RESULT_BYTE</a>;
00372     <a class="code" href="board_8h.html#a43">SPIPutCharWithoutWaiting</a>(0xff);
00373     <a class="code" href="board_8h.html#a41">SPIWait</a>();
00374     *<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++=<a class="code" href="board_8h.html#a44">SPI_RESULT_BYTE</a>;
00375     <a class="code" href="board_8h.html#a43">SPIPutCharWithoutWaiting</a>(0xff);
00376     <a class="code" href="board_8h.html#a41">SPIWait</a>();
00377     *<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++=<a class="code" href="board_8h.html#a44">SPI_RESULT_BYTE</a>;