mmc_8c.html

MP3 Player Source Code

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<a class="anchor" name="a4" doxytag="mmc.c::RebootMMC" ></a><p>
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          <td class="md" nowrap valign="top"> unsigned char RebootMMC           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="mdname1" valign="top" nowrap>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
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<p>
Try to switch on the MMC. 
<p>

<p>
Definition at line <a class="el" href="mmc_8c-source.html#l00221">221</a> of file <a class="el" href="mmc_8c-source.html">mmc.c</a>.
<p>
References <a class="el" href="board_8c-source.html#l00035">Delay()</a>, and <a class="el" href="mmc_8c-source.html#l00019">MmcCommand()</a>.
<p>
Referenced by <a class="el" href="mmc_8c-source.html#l00249">InitMMC()</a>, and <a class="el" href="mmc_8c-source.html#l00431">SeekSector()</a>.
<p>
<pre class="fragment"><div>00221                          {
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 }
</div></pre>
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<a class="anchor" name="a8" doxytag="mmc.c::SeekSector" ></a><p>
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          <td class="md" nowrap valign="top"> Public unsigned char SeekSector           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">unsigned long&nbsp;</td>
          <td class="mdname1" valign="top" nowrap> <em>sectorN</em>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
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<p>
Perform MMC Seek Command for offset sectorN*512. 
<p>

<p>
Definition at line <a class="el" href="mmc_8c-source.html#l00431">431</a> of file <a class="el" href="mmc_8c-source.html">mmc.c</a>.
<p>
References <a class="el" href="unionAddress.html#o1">Address::b</a>, <a class="el" href="buffer_8h-source.html#l00131">Address::B::b0</a>, <a class="el" href="buffer_8h-source.html#l00132">Address::B::b1</a>, <a class="el" href="buffer_8h-source.html#l00133">Address::B::b2</a>, <a class="el" href="mmc_8c-source.html#l00399">ConsoleDecipherMMCResponse()</a>, <a class="el" href="buffer_8h-source.html#l00129">Address::l</a>, <a class="el" href="board_8h-source.html#l00159">MMC_NOT_SELECTED</a>, <a class="el" href="board_8h-source.html#l00153">MMC_XCS</a>, <a class="el" href="mmc_8c-source.html#l00019">MmcCommand()</a>, <a class="el" href="board_8h-source.html#l00262">Public</a>, <a class="el" href="mmc_8c-source.html#l00221">RebootMMC()</a>, and <a class="el" href="buffer_8c-source.html#l00015">sectorAddress</a>.
<p>
Referenced by <a class="el" href="mmc_8c-source.html#l00249">InitMMC()</a>, <a class="el" href="storage_8c-source.html#l00071">PrepareToReadDiskSector()</a>, and <a class="el" href="storage_8c-source.html#l00110">ReadDiskSector()</a>.
<p>
<pre class="fragment"><div>00431                                                       {
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 }
</div></pre>
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<a class="anchor" name="a10" doxytag="mmc.c::WritePhysicalSector" ></a><p>
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          <td class="md" nowrap valign="top"> unsigned char WritePhysicalSector           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="mdname1" valign="top" nowrap>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
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<p>
Perform MMC block write from <b>*dataBufPtr</b> to sector sectorAddress.l. 
<p>

<p>
Definition at line <a class="el" href="mmc_8c-source.html#l00502">502</a> of file <a class="el" href="mmc_8c-source.html">mmc.c</a>.
<p>
References <a class="el" href="unionAddress.html#o1">Address::b</a>, <a class="el" href="buffer_8h-source.html#l00131">Address::B::b0</a>, <a class="el" href="buffer_8h-source.html#l00132">Address::B::b1</a>, <a class="el" href="buffer_8h-source.html#l00133">Address::B::b2</a>, <a class="el" href="buffer_8h-source.html#l00107">DiskBlock::Raw::buf</a>, <a class="el" href="buffer_8c-source.html#l00013">dataBufPtr</a>, <a class="el" href="buffer_8c-source.html#l00010">diskSect</a>, <a class="el" href="buffer_8h-source.html#l00129">Address::l</a>, <a class="el" href="board_8h-source.html#l00075">LED_OFF</a>, <a class="el" href="board_8h-source.html#l00072">LED_ON</a>, <a class="el" href="board_8h-source.html#l00159">MMC_NOT_SELECTED</a>, <a class="el" href="board_8h-source.html#l00156">MMC_SELECTED</a>, <a class="el" href="board_8h-source.html#l00153">MMC_XCS</a>, <a class="el" href="mmc_8c-source.html#l00019">MmcCommand()</a>, <a class="el" href="mmc_8c-source.html#l00102">MmcWaitForData()</a>, <a class="el" href="unionDiskBlock.html#o1">DiskBlock::raw</a>, <a class="el" href="board_8h-source.html#l00066">RED_LED</a>, <a class="el" href="buffer_8c-source.html#l00015">sectorAddress</a>, <a class="el" href="board_8c-source.html#l00026">SPI8Clocks()</a>, <a class="el" href="board_8c-source.html#l00018">SPIGetChar()</a>, <a class="el" href="board_8h-source.html#l00220">SPIPutCharWithoutWaiting</a>, a