mmc_8c.html

MP3播放器源代码, VS1003B

          <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#l00217">217</a> of file <a class="el" href="mmc_8c-source.html">mmc.c</a>.
<p>
References <a class="el" href="board_8c-source.html#l00036">Delay()</a>, <a class="el" href="mmc_8c-source.html#l00019">MmcCommand()</a>, and <a class="el" href="board_8c-source.html#l00026">SPI8Clocks()</a>.
<p>
Referenced by <a class="el" href="mmc_8c-source.html#l00246">InitMMC()</a>, and <a class="el" href="mmc_8c-source.html#l00431">SeekSector()</a>.
<p>
<pre class="fragment"><div>00217                          {
00218   <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> c;
00219 
00220   <span class="comment">//Try (indefinitely) to switch on the MMC card</span>
00221   <span class="keywordflow">do</span>{
00222     <a class="code" href="board_8h.html#a50">SPI8Clocks</a>(8);      
00223     <span class="comment">/* MMC Don't use CRC - seems to be required by some MMC cards? */</span>
00224     <a class="code" href="mmc_8c.html#a0">MmcCommand</a>(0x7B,0,0,0,0);
00225     <span class="comment">/* MMC Init, command 0x40 should return 0x01 (idle) if all is ok. */</span>
00226   }<span class="keywordflow">while</span> (<a class="code" href="mmc_8c.html#a0">MmcCommand</a>(0x40,0,0,0,0)!=0x01);
00227   <span class="comment">// 0x01(idle) response detected.</span>
00228   
00229   ConsoleWrite(<span class="stringliteral">"Card found, starting... "</span>);
00230   <span class="comment">/*Try max 255 times MMC Wake-up call: set to Not Idle (mmc returns 0x00)*/</span>
00231   c=255;
00232   <span class="keywordflow">while</span> ((c--)&amp;&amp;(<a class="code" href="mmc_8c.html#a0">MmcCommand</a>(0x41,0,0,0,16))){
00233     <a class="code" href="board_8h.html#a51">Delay</a>(10);
00234     <span class="keywordflow">if</span> (c==1){
00235       <span class="comment">//timeout</span>
00236       ConsoleWrite(<span class="stringliteral">"Failed.\r"</span>);
00237       <span class="keywordflow">return</span> 2; <span class="comment">/* Not able to power up mmc */</span>
00238     }
00239   }
00240 
00241   ConsoleWrite(<span class="stringliteral">"Ok.\r"</span>);
00242   <span class="keywordflow">return</span> 0;
00243 }
</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>
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<p>
Perform MMC Seek Command for offset sectorN*512. 
<p>
In English: Send the Read Sector command to MMC 
<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#l00397">ConsoleDecipherMMCResponse()</a>, <a class="el" href="buffer_8h-source.html#l00129">Address::l</a>, <a class="el" href="mmc_8c-source.html#l00019">MmcCommand()</a>, <a class="el" href="board_8h-source.html#l00178">MMCDeselect</a>, <a class="el" href="board_8h-source.html#l00280">Public</a>, <a class="el" href="mmc_8c-source.html#l00217">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#l00246">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   <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 }
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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#l00484">484</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="mmc_8c-source.html#l00019">MmcCommand()</a>, <a class="el" href="board_8h-source.html#l00178">MMCDeselect</a>, <a class="el" href="unionDiskBlock.html#o1">DiskBlock::raw</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#l00238">SPIPutCharWithoutWaiting</a>, and <a class="el" href="board_8h-source.html#l00232">SPIWait</a>.
<p>
Referenced by <a class="el" href="storage_8c-source.html#l00183">WriteDiskSector()</a>.
<p>
<pre class="fragment"><div>00484                                    {
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"