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MSP acquires data and sends through USB to PC. Check the link for PC capture software and project d

<a name="l00147"></a>00147 <span class="comment">/* Wait for card ready                                                   */</span>
<a name="l00148"></a>00148 <span class="comment">/*-----------------------------------------------------------------------*/</span>
<a name="l00149"></a>00149 
<a name="l00150"></a>00150 <span class="keyword">static</span>
<a name="l00151"></a>00151 BYTE wait_ready (<span class="keywordtype">void</span>)
<a name="l00152"></a>00152 {
<a name="l00153"></a>00153         BYTE res;
<a name="l00154"></a>00154 
<a name="l00155"></a>00155 
<a name="l00156"></a>00156         Timer2 = 50;                    <span class="comment">/* Wait for ready in timeout of 500ms */</span>
<a name="l00157"></a>00157         rcvr_spi();
<a name="l00158"></a>00158         <span class="keywordflow">do</span>
<a name="l00159"></a>00159                 res = rcvr_spi();
<a name="l00160"></a>00160         <span class="keywordflow">while</span> ((res != 0xFF) &amp;&amp; Timer2);
<a name="l00161"></a>00161         <span class="keywordflow">return</span> res;
<a name="l00162"></a>00162 }
<a name="l00163"></a>00163 
<a name="l00164"></a>00164 
<a name="l00165"></a>00165 
<a name="l00166"></a>00166 <span class="comment">/*-----------------------------------------------------------------------*/</span>
<a name="l00167"></a>00167 <span class="comment">/* Power Control  (Platform dependent)                                   */</span>
<a name="l00168"></a>00168 <span class="comment">/*-----------------------------------------------------------------------*/</span>
<a name="l00169"></a>00169 <span class="comment">/* When the target system does not support socket power control, there   */</span>
<a name="l00170"></a>00170 <span class="comment">/* is nothing to do in these functions and chk_power always returns 1.   */</span>
<a name="l00171"></a>00171 
<a name="l00172"></a>00172 <span class="preprocessor">#if 0</span>
<a name="l00173"></a>00173 <span class="preprocessor"></span><span class="keyword">static</span>
<a name="l00174"></a>00174 <span class="keywordtype">void</span> power_on (<span class="keywordtype">void</span>)
<a name="l00175"></a>00175 {
<a name="l00176"></a>00176         IO.PUCR5.BYTE = 0x30;           <span class="comment">/* Enable pull-up for socket contacts */</span>
<a name="l00177"></a>00177         IO.PDR5.BYTE = 0x00;            <span class="comment">/* Power ON */</span>
<a name="l00178"></a>00178         IO.PCR5 = 0x80;
<a name="l00179"></a>00179         <span class="keywordflow">for</span> (Timer1 = 2; Timer1; );     <span class="comment">/* Wait for 20ms */</span>
<a name="l00180"></a>00180         IO.PDR5.BYTE = 0x0E;            <span class="comment">/* Enable Driver */</span>
<a name="l00181"></a>00181         IO.PCR5 = 0x8B;
<a name="l00182"></a>00182         <span class="keywordflow">for</span> (Timer1 = 1; Timer1; );     <span class="comment">/* Wait for 10ms */</span>
<a name="l00183"></a>00183 }
<a name="l00184"></a>00184 
<a name="l00185"></a>00185 
<a name="l00186"></a>00186 <span class="keyword">static</span>
<a name="l00187"></a>00187 <span class="keywordtype">void</span> power_off (<span class="keywordtype">void</span>)
<a name="l00188"></a>00188 {
<a name="l00189"></a>00189         <a class="code" href="mmc_8c.html#56e8d2ffde94d0c5fdf14b772a32a77f">SELECT</a>();                               <span class="comment">/* Wait for card ready */</span>
<a name="l00190"></a>00190         wait_ready();
<a name="l00191"></a>00191         <a class="code" href="mmc_8c.html#1cbd972fc333e07d29999e284020c362">DESELECT</a>();
<a name="l00192"></a>00192         rcvr_spi();
<a name="l00193"></a>00193 
<a name="l00194"></a>00194         IO.PDR5.BYTE = 0x00;    <span class="comment">/* Disable driver */</span>
<a name="l00195"></a>00195         IO.PCR5 = 0x80;
<a name="l00196"></a>00196         IO.PDR5.BYTE = 0x80;    <span class="comment">/* Power OFF */</span>
<a name="l00197"></a>00197 
<a name="l00198"></a>00198         Stat |= STA_NOINIT;             <span class="comment">/* Set STA_NOINIT */</span>
<a name="l00199"></a>00199 }
<a name="l00200"></a>00200 <span class="preprocessor">#endif</span>
<a name="l00201"></a>00201 <span class="preprocessor"></span>
<a name="l00202"></a>00202 
<a name="l00203"></a>00203 
<a name="l00204"></a>00204 <span class="comment">/*-----------------------------------------------------------------------*/</span>
<a name="l00205"></a>00205 <span class="comment">/* Receive a data packet from MMC                                        */</span>
<a name="l00206"></a>00206 <span class="comment">/*-----------------------------------------------------------------------*/</span>
<a name="l00207"></a>00207 
<a name="l00208"></a>00208 <span class="keyword">static</span>
<a name="l00209"></a>00209 BOOL rcvr_datablock (
<a name="l00210"></a>00210         BYTE *buff,                     <span class="comment">/* Data buffer to store received data */</span>
<a name="l00211"></a>00211         UINT btr                        <span class="comment">/* Byte count (must be even number) */</span>
<a name="l00212"></a>00212 )
<a name="l00213"></a>00213 {
<a name="l00214"></a>00214         BYTE token;
<a name="l00215"></a>00215 
<a name="l00216"></a>00216 
<a name="l00217"></a>00217         Timer1 = 10;
<a name="l00218"></a>00218         <span class="keywordflow">do</span> {                                                    <span class="comment">/* Wait for data packet in timeout of 100ms */</span>
<a name="l00219"></a>00219                 token = rcvr_spi();
<a name="l00220"></a>00220         } <span class="keywordflow">while</span> ((token == 0xFF) &amp;&amp; Timer1);
<a name="l00221"></a>00221         <span class="keywordflow">if</span>(token != 0xFE) <span class="keywordflow">return</span> <a class="code" href="common_8h.html#a93f0eb578d23995850d61f7d61c55c1">FALSE</a>; <span class="comment">/* If not valid data token, retutn with error */</span>
<a name="l00222"></a>00222 
<a name="l00223"></a>00223         <span class="keywordflow">do</span> {                                                    <span class="comment">/* Receive the data block into buffer */</span>
<a name="l00224"></a>00224                 *buff++ = rcvr_spi();
<a name="l00225"></a>00225                 *buff++ = rcvr_spi();
<a name="l00226"></a>00226         } <span class="keywordflow">while</span> (btr -= 2);
<a name="l00227"></a>00227         rcvr_spi();                                             <span class="comment">/* Discard CRC */</span>
<a name="l00228"></a>00228         rcvr_spi();
<a name="l00229"></a>00229 
<a name="l00230"></a>00230         <span class="keywordflow">return</span> <a class="code" href="common_8h.html#a8cecfc5c5c054d2875c03e77b7be15d">TRUE</a>;                                    <span class="comment">/* Return with success */</span>
<a name="l00231"></a>00231 }
<a name="l00232"></a>00232 
<a name="l00233"></a>00233 
<a name="l00234"></a>00234 
<a name="l00235"></a>00235 <span class="comment">/*-----------------------------------------------------------------------*/</span>
<a name="l00236"></a>00236 <span class="comment">/* Send a data packet to MMC                                             */</span>
<a name="l00237"></a>00237 <span class="comment">/*-----------------------------------------------------------------------*/</span>
<a name="l00238"></a>00238 
<a name="l00239"></a>00239 <span class="preprocessor">#if _READONLY == 0</span>
<a name="l00240"></a>00240 <span class="preprocessor"></span><span class="keyword">static</span>
<a name="l00241"></a>00241 BOOL xmit_datablock (
<a name="l00242"></a>00242         <span class="keyword">const</span> BYTE *buff,       <span class="comment">/* 512 byte data block to be transmitted */</span>
<a name="l00243"></a>00243         BYTE token                      <span class="comment">/* Data/Stop token */</span>
<a name="l00244"></a>00244 )
<a name="l00245"></a>00245 {
<a name="l00246"></a>00246         BYTE resp, wc;
<a name="l00247"></a>00247 
<a name="l00248"></a>00248 
<a name="l00249"></a>00249         <span class="keywordflow">if</span> (wait_ready() != 0xFF) <span class="keywordflow">return</span> <a class="code" href="common_8h.html#a93f0eb578d23995850d61f7d61c55c1">FALSE</a>;
<a name="l00250"></a>00250 
<a name="l00251"></a>00251         xmit_spi(token);                                        <span class="comment">/* Xmit data token */</span>
<a name="l00252"></a>00252         <span class="keywordflow">if</span> (token != 0xFD) {    <span class="comment">/* Is data token */</span>
<a name="l00253"></a>00253                 wc = 0;
<a name="l00254"></a>00254                 <span class="keywordflow">do</span> {                                                    <span class="comment">/* Xmit the 512 byte data block to MMC */</span>
<a name="l00255"></a>00255                         xmit_spi(*buff++);
<a name="l00256"></a>00256                         xmit_spi(*buff++);
<a name="l00257"></a>00257                 } <span class="keywordflow">while</span> (--wc);
<a name="l00258"></a>00258                 xmit_spi(0xFF);                                 <span class="comment">/* CRC (Dummy) */</span>
<a name="l00259"></a>00259                 xmit_spi(0xFF);
<a name="l00260"></a>00260                 resp = rcvr_spi();                              <span class="comment">/* Reveive data response */</span>
<a name="l00261"></a>00261                 <span class="keywordflow">if</span> ((resp &amp; 0x1F) != 0x05)              <span class="comment">/* If not accepted, return with error */</span>
<a name="l00262"></a>00262                         <span class="keywordflow">return</span> <a class="code" href="common_8h.html#a93f0eb578d23995850d61f7d61c55c1">FALSE</a>;
<a name="l00263"></a>00263         }
<a name="l00264"></a>00264 
<a name="l00265"></a>00265         <span class="keywordflow">return</span> <a class="code" href="common_8h.html#a8cecfc5c5c054d2875c03e77b7be15d">TRUE</a>;
<a name="l00266"></a>00266 }
<a name="l00267"></a>00267 <span class="preprocessor">#endif </span><span class="comment">/* _READONLY */</span>
<a name="l00268"></a>00268 
<a name="l00269"></a>00269 
<a name="l00270"></a>00270 
<a name="l00271"></a>00271 <span class="comment">/*-----------------------------------------------------------------------*/</span>
<a name="l00272"></a>00272 <span class="comment">/* Send a command packet to MMC                                          */</span>
<a name="l00273"></a>00273 <span class="comment">/*-----------------------------------------------------------------------*/</span>
<a name="l00274"></a>00274 
<a name="l00275"></a>00275 <span class="keyword">static</span>
<a name="l00276"></a>00276 BYTE send_cmd (
<a name="l00277"></a>00277         BYTE cmd,               <span class="comment">/* Command byte */</span>
<a name="l00278"></a>00278         DWORD arg               <span class="comment">/* Argument */</span>
<a name="l00279"></a>00279 )
<a name="l00280"></a>00280 {
<a name="l00281"></a>00281         BYTE n, res;
<a name="l00282"></a>00282 
<a name="l00283"></a>00283 
<a name="l00284"></a>00284         <span class="keywordflow">if</span> (wait_ready() != 0xFF) <span class="keywordflow">return</span> 0xFF;
<a name="l00285"></a>00285 
<a name="l00286"></a>00286         <span class="comment">/* Send command packet */</span>
<a name="l00287"></a>00287         xmit_spi(cmd);                                          <span class="comment">/* Command */</span>
<a name="l00288"></a>00288         xmit_spi((BYTE)(arg &gt;&gt; 24));            <span class="comment">/* Argument[31..24] */</span>
<a name="l00289"></a>00289         xmit_spi((BYTE)(arg &gt;&gt; 16));            <span class="comment">/* Argument[23..16] */</span>
<a name="l00290"></a>00290         xmit_spi((BYTE)(arg &gt;&gt; 8));                     <span class="comment">/* Argument[15..8] */</span>
<a name="l00291"></a>00291         xmit_spi((BYTE)arg);                            <span class="comment">/* Argument[7..0] */</span>
<a name="l00292"></a>00292         n = 0;
<a name="l00293"></a>00293         <span class="keywordflow">if</span> (cmd == <a class="code" href="mmc_8c.html#938c1466755f12fb04ac0d1b775584d1">CMD0</a>) n = 0x95;                      <span class="comment">/* CRC for CMD0(0) */</span>
<a name="l00294"></a>00294         <span class="keywordflow">if</span> (cmd == <a class="code" href="mmc_8c.html#c75b3e0ad1fb013ea946fb49bbe65668">CMD8</a>) n = 0x87;                      <span class="comment">/* CRC for CMD8(0x1AA) */</span>
<a name="l00295"></a>00295         xmit_spi(n);
<a name="l00296"></a>00296 
<a name="l00297"></a>00297         <span class="comment">/* Receive command response */</span>
<a name="l00298"></a>00298         <span class="keywordflow">if</span> (cmd == <a class="code" href="mmc_8c.html#8d6283c9b060afbaa0e6d1ff7e5ea7b8">CMD12</a>) rcvr_spi();           <span class="comment">/* Skip a stuff byte when stop reading */</span>
<a name="l00299"></a>00299         n = 10;                                                         <span class="comment">/* Wait for a valid response in timeout of 10 attempts */</span>
<a name="l00300"></a>00300         <span class="keywordflow">do</span>
<a name="l00301"></a>00301                 res = rcvr_spi();
<a name="l00302"></a>00302         <span class="keywordflow">while</span> ((res &amp; 0x80) &amp;&amp; --n);
<a name="l00303"></a>00303 
<a name="l00304"></a>00304         <span class="keywordflow">return</span> res;                     <span class="comment">/* Return with the response value */</span>
<a name="l00305"></a>00305 }