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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>VLSI Solution Oy Evaluation MP3 Player Source Code Documentation</title><link href="doxygen.css" rel="stylesheet" type="text/css"><img src="vlsi_small.gif" hspace="20" bordercolor="#ffffff" alt="VLSI Solution Oy"><b>VLSI Solution Oy Evaluation MP3 Player Source Code Documentation</b><p></p></head><body><!-- Generated by Doxygen 1.3.7 --><div class="qindex"><a class="qindex" href="index.html">Main Page</a> | <a class="qindex" href="annotated.html">Class List</a> | <a class="qindex" href="files.html">File List</a> | <a class="qindex" href="functions.html">Class Members</a> | <a class="qindex" href="globals.html">File Members</a> | <a class="qindex" href="pages.html">Related Pages</a></div><h1>mmc.c</h1><a href="mmc_8c.html">Go to the documentation of this file.</a><pre class="fragment"><div>00001 00006 <span class="preprocessor">#include "<a class="code" href="mmc_8h.html">mmc.h</a>"</span>00007 <span class="preprocessor">#include "<a class="code" href="board_8h.html">board.h</a>"</span>00008 <span class="preprocessor">#include "console.h"</span>00009 <span class="preprocessor">#include "<a class="code" href="buffer_8h.html">buffer.h</a>"</span>00010 00011 <span class="comment">//#define MMCDEBUG</span>00012 <span class="comment">//#define MMCLONGDEBUG</span>00013 00014 <a name="l00019"></a><a class="code" href="mmc_8c.html#a0">00019</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="mmc_8c.html#a0">MmcCommand</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> c1, 00020 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> c2, 00021 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> c3, 00022 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> c4, 00023 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> c5){00024 00025 00026 xdata <span class="keywordtype">char</span> c;00027 00028 <span class="comment">/* Note: c1, c2 are used for temporary variables after use! */</span> 00029 00030 <a class="code" href="board_8h.html#a28">MMC_OFF</a> = <a class="code" href="board_8h.html#a27">NO</a>; <span class="comment">//MMC should be powered, but switch power on just-in-case</span>00031 <a class="code" href="board_8h.html#a29">MMC_XCS</a> = <a class="code" href="board_8h.html#a31">MMC_NOT_SELECTED</a>; <span class="comment">//put MMC on-line.</span>00032 00033 <span class="comment">// Provide clock edges before and after asserting MMC CS</span>00034 <a class="code" href="board_8h.html#a48">SPI8Clocks</a>(8); 00035 <a class="code" href="board_8h.html#a29">MMC_XCS</a> = <a class="code" href="board_8h.html#a30">MMC_SELECTED</a>;00036 <a class="code" href="board_8h.html#a48">SPI8Clocks</a>(8); 00037 00038 c=0;00039 <span class="comment">// If card still seems to be busy, give it some time...</span>00040 <span class="keywordflow">while</span> ((<a class="code" href="board_8c.html#a1">SPIGetChar</a>()!=0xff) && (c<100)){00041 ConsolePutChar(<span class="charliteral">'.'</span>);00042 c++;00043 }00044 00045 00046 <span class="comment">// The bus should be stable high now</span>00047 <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a44">SPI_RESULT_BYTE</a> != 0xff){00048 ConsoleWrite(<span class="stringliteral">"\rUnexpected busy signal from MMC. "</span>);00049 <a class="code" href="board_8h.html#a29">MMC_XCS</a> = <a class="code" href="board_8h.html#a31">MMC_NOT_SELECTED</a>; <span class="comment">//drop MMC offline.</span>00050 <span class="keywordflow">return</span> 0x81; <span class="comment">//MMC unexpectedly Busy</span>00051 }00052 00053 <span class="preprocessor">#ifdef MMCDEBUG</span>00054 <span class="preprocessor"></span> DebugMessage(<span class="stringliteral">" \x1b[7m"</span>);00055 ConsolePutChar(<span class="charliteral">'C'</span>); ConsolePutHex8(c1); ConsolePutHex8(c2); ConsolePutHex8(c3);00056 ConsolePutHex8(c4); ConsolePutHex8(c5); ConsolePutChar(<span class="charliteral">'|'</span>);00057 <span class="preprocessor">#endif</span>00058 <span class="preprocessor"></span>00059 <span class="comment">// Send the MMC command</span>00060 <a class="code" href="board_8h.html#a43">SPIPutCharWithoutWaiting</a>(c1);00061 <a class="code" href="board_8h.html#a42">SPIPutChar</a>(c2);00062 <a class="code" href="board_8h.html#a42">SPIPutChar</a>(c3);00063 <a class="code" href="board_8h.html#a42">SPIPutChar</a>(c4);00064 <a class="code" href="board_8h.html#a42">SPIPutChar</a>(c5);00065 <a class="code" href="board_8h.html#a42">SPIPutChar</a>(0x95); <span class="comment">/* Valid CRC for init, then don't care */</span>00066 <a class="code" href="board_8h.html#a41">SPIWait</a>();00067 <span class="comment">/* Now ok to use c1..c5 as temporaries (dirty but kool) */</span>00068 00069 <span class="comment">// Wait for R1 style response (bit 7 low) from MMC</span>00070 <span class="preprocessor">#ifdef MMCDEBUG </span>00071 <span class="preprocessor"></span> {00072 c1=100; <span class="comment">/* try max. 100 times */</span>00073 <span class="keywordflow">while</span>((c1--)&&((c2=<a class="code" href="board_8c.html#a1">SPIGetChar</a>())&0x80)){ <span class="comment">//wait for R1 or timeout</span>00074 <span class="comment">// R1 response not detected, if it's not 0xff, print it for debugging.</span>00075 <span class="keywordflow">if</span> (c2!=0xff){ConsolePutHex8(c2);ConsolePutChar(<span class="charliteral">'|'</span>);}00076 }00077 ConsolePutHex8(c2);00078 DebugMessage(<span class="stringliteral">"\x1b[0m "</span>);00079 }00080 <span class="preprocessor">#else </span>00081 <span class="preprocessor"></span> {00082 c1=100;00083 <span class="keywordflow">while</span>((c1--)&&((c2=<a class="code" href="board_8c.html#a1">SPIGetChar</a>())&0x80)) <span class="comment">//wait for R1 or timeout</span>00084 ;00085 }00086 <span class="preprocessor">#endif</span>00087 <span class="preprocessor"></span>00088 <span class="keywordflow">return</span> c2; <span class="comment">//return the R1 response</span>00089 }00090 00091 <a name="l00102"></a><a class="code" href="mmc_8c.html#a1">00102</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="mmc_8c.html#a1">MmcWaitForData</a>(){00103 00104 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> c;00105 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i = 32000;00106 00107 DebugMessage(<span class="stringliteral">"<t:"</span>); <span class="comment">//Token Wait</span>00108 00109 00110 <span class="comment">// Wait until something else than 0xff is read from the bus</span>00111 <span class="keywordflow">do</span> {00112 c=<a class="code" href="board_8c.html#a1">SPIGetChar</a>();00113 <span class="preprocessor">#ifdef MMCDEBUG </span>00114 <span class="preprocessor"></span> <span class="keywordflow">if</span> (c!=0xFF) ConsolePutHex8(c); <span class="comment">//0xfe token or some erroneus byte</span>00115 <span class="preprocessor">#endif</span>00116 <span class="preprocessor"></span> } <span class="keywordflow">while</span> ((c == 0xff)&&(--i));00117 00118 00119 <span class="keywordflow">if</span> (!i){ <span class="comment">//timeout }</span>00120 00121 ConsoleWrite(<span class="stringliteral">"\rTimeout while waiting for block.\r"</span>);00122 <a class="code" href="board_8h.html#a29">MMC_XCS</a> = <a class="code" href="board_8h.html#a31">MMC_NOT_SELECTED</a>;00123 <span class="keywordflow">return</span> 5; <span class="comment">//return error</span>00124 00125 }00126 00127 <span class="comment">// Something was received from the bus? Might it actually be te </span>00128 <span class="comment">// desired 0xFE data start token? </span>00129 <span class="keywordflow">if</span> (c != 0xfe){00130 <span class="comment">// No data start token, read fail. In an OS an error message would display.</span>00131 <span class="comment">// Since we're in an embedded system, it's unclear what we should do now.</span>00132 <span class="comment">// Current approach is to say all ok but make read block return 0xff's.</span>00133 <span class="comment">// It's not disasterous at least as long as we don't WRITE to MMC.</span>00134 00135 <span class="comment">// Flush any data that might be pending from the MMC.</span>00136 <span class="preprocessor">#ifdef MMCLONGDEBUG </span>00137 <span class="preprocessor"></span> {00138 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i;00139 ConsoleWrite(<span class="stringliteral">"\rMMCWaitForData failed. "</span>);00140 ConsoleWrite(<span class="stringliteral">"Expected 0xFE token, received: "</span>);00141 <span class="keywordflow">for</span> (i=0;i<550;i++){00142 ConsolePutHex8(c);00143 c=<a class="code" href="board_8c.html#a1">SPIGetChar</a>();00144 }00145 }00146 <span class="preprocessor">#else</span>00147 <span class="preprocessor"></span> <a class="code" href="board_8h.html#a48">SPI8Clocks</a>(200); <span class="comment">/* Flush MMC by sending lots of FF's to it */</span>00148 <a class="code" href="board_8h.html#a48">SPI8Clocks</a>(200);00149 <a class="code" href="board_8h.html#a48">SPI8Clocks</a>(200);00150 <span class="preprocessor">#endif</span>00151 <span class="preprocessor"></span>00152 <a class="code" href="board_8h.html#a29">MMC_XCS</a> = <a class="code" href="board_8h.html#a31">MMC_NOT_SELECTED</a>; <span class="comment">//Drop MMC offline now.</span>00153 DebugMessage(<span class="stringliteral">"!t>"</span>);00154 <span class="keywordflow">return</span> 5; <span class="comment">//Return error</span>00155 00156 }00157 00158 DebugMessage(<span class="stringliteral">"t>"</span>); <span class="comment">//Exit Token Wait</span>00159 <span class="keywordflow">return</span> 0;00160 00161 }00162 00163 <a name="l00169"></a><a class="code" href="mmc_8c.html#a2">00169</a> <span class="keywordtype">void</span> <a class="code" href="mmc_8c.html#a2">MmcGetData</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> amountOctets){00170 DebugMessage(<span class="stringliteral">"<G"</span>);00171 00172 <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>;00173 <span class="keywordflow">while</span> (amountOctets--){00174 *<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++=<a class="code" href="board_8c.html#a1">SPIGetChar</a>();00175 }00176 DebugMessage(<span class="stringliteral">"G>"</span>);00177 }00178 00179 <a name="l00181"></a><a class="code" href="mmc_8c.html#a3">00181</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="mmc_8c.html#a3">GetStorageInformation</a>(){00182 <span class="keywordflow">if</span> (<a class="code" href="mmc_8c.html#a0">MmcCommand</a>(0x4a,0,0,0,0)&0xfe)00183 <span class="keywordflow">return</span> 4; <span class="comment">/* no storage info */</span>00184 <a class="code" href="mmc_8c.html#a1">MmcWaitForData</a>();00185 <a class="code" href="mmc_8c.html#a2">MmcGetData</a>(30);00186 00187 ConsoleWrite(<span class="stringliteral">"\rMMC Manufacturer#: "</span>);00188 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>[0]);00189 ConsoleWrite(<span class="stringliteral">"Product Name: "</span>);00190 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>[3]);00191 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>[4]);00192 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>[5]);00193 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>[6]);⌨️ 快捷键说明
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