system_8c-source.html

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

<a name="l00088"></a>00088     <span class="comment">// Low Frequency, Oscillator capacitor ~6 pF</span>
<a name="l00089"></a>00089     <span class="comment">//DCO+ set so freq = xtal 2 x N+1</span>
<a name="l00090"></a>00090     FLL_CTL0 = DCOPLUS + XCAP10PF;
<a name="l00091"></a>00091 
<a name="l00092"></a>00092     <span class="comment">/* System Clock Control Register */</span>
<a name="l00093"></a>00093     <span class="comment">// Enable modulation</span>
<a name="l00094"></a>00094     <span class="comment">// fDCOCLK = (N + 1) * fcrystal</span>
<a name="l00095"></a>00095     <span class="comment">// fDCOCLK = (29+1) * 32768 * 2 = 1 966 080 Hz ~ 2MHz</span>
<a name="l00096"></a>00096     <span class="comment">//SCFQCTL = 29;</span>
<a name="l00097"></a>00097 
<a name="l00098"></a>00098     <span class="comment">/* System Clock Control Register */</span>
<a name="l00099"></a>00099     <span class="comment">// Enable modulation</span>
<a name="l00100"></a>00100     <span class="comment">// fDCOCLK = (N + 1) * fcrystal</span>
<a name="l00101"></a>00101     <span class="comment">// fDCOCLK = (121+1) * 32768 * 2 = 7 995 392 Hz ~ 8MHz</span>
<a name="l00102"></a>00102     <span class="comment">// SCFQCTL = 121;</span>
<a name="l00103"></a>00103     SCFQCTL = 121;
<a name="l00104"></a>00104 
<a name="l00105"></a>00105     <span class="comment">/* FLL+ Control Register 1 */</span>
<a name="l00106"></a>00106     <span class="comment">// SMCLK on, XT2 off, DCO for main oscilator, ACLK By 1</span>
<a name="l00107"></a>00107     <span class="comment">// SMCLK clocked from DCO</span>
<a name="l00108"></a>00108     FLL_CTL1 = XT2OFF + SELM0 + FLL_DIV_1;
<a name="l00109"></a>00109 <span class="preprocessor">#if 0</span>
<a name="l00110"></a>00110 <span class="preprocessor"></span>    FLL_CTL0 &amp;= ~XTS_FLL;                           <span class="comment">// XT1 as low-frequency</span>
<a name="l00111"></a>00111     FLL_CTL0 = XCAP10PF;                            <span class="comment">// set load capacitance for 32k xtal</span>
<a name="l00112"></a>00112 
<a name="l00113"></a>00113     _BIC_SR (OSCOFF);                               <span class="comment">// turn on XT1 oscillator</span>
<a name="l00114"></a>00114 
<a name="l00115"></a>00115     <span class="keywordflow">do</span>                                              <span class="comment">// wait in loop until crystal is stable</span>
<a name="l00116"></a>00116     {
<a name="l00117"></a>00117         IFG1 &amp;= ~OFIFG;
<a name="l00118"></a>00118     }
<a name="l00119"></a>00119     <span class="keywordflow">while</span> (IFG1 &amp; OFIFG);
<a name="l00120"></a>00120 
<a name="l00121"></a>00121     FLL_CTL1 &amp;= ~FLL_DIV0;                          <span class="comment">// ACLK = XT1</span>
<a name="l00122"></a>00122     FLL_CTL1 &amp;= ~FLL_DIV1;
<a name="l00123"></a>00123 
<a name="l00124"></a>00124     IFG1 &amp;= ~OFIFG;                                 <span class="comment">// clear osc. fault int. flag</span>
<a name="l00125"></a>00125 
<a name="l00126"></a>00126     FLL_CTL1 &amp;= ~SELM0;                             <span class="comment">// set DCO as MCLK</span>
<a name="l00127"></a>00127     FLL_CTL1 &amp;= ~SELM1;
<a name="l00128"></a>00128 <span class="preprocessor">#endif</span>
<a name="l00129"></a>00129 <span class="preprocessor"></span>}
<a name="l00130"></a>00130 
<a name="l00131"></a>00131 
<a name="l00132"></a>00132 <span class="comment">/****************************************************************************/</span>
<a name="l00133"></a>00133 <span class="comment">/*  Preparing board to enter sleep mode - low power consumption             */</span>
<a name="l00134"></a>00134 <span class="comment">/*  Function : GoToSleep                                                    */</span>
<a name="l00135"></a>00135 <span class="comment">/*      Parameters                                                          */</span>
<a name="l00136"></a>00136 <span class="comment">/*          Input   :  Nothing                                              */</span>
<a name="l00137"></a>00137 <span class="comment">/*          Output  :  Nothing                                              */</span>
<a name="l00138"></a>00138 <span class="comment">/****************************************************************************/</span>
<a name="l00139"></a><a class="code" href="system_8h.html#d6f5b53d1751c23f9dbd6d2bbeeefa4e">00139</a> <span class="keywordtype">void</span> <a class="code" href="system_8c.html#d6f5b53d1751c23f9dbd6d2bbeeefa4e">GoToSleep</a>(<span class="keywordtype">void</span>) 
<a name="l00140"></a>00140 {
<a name="l00141"></a>00141     <span class="comment">// Flash CS high - disable</span>
<a name="l00142"></a>00142     P7DIR |= BIT0;
<a name="l00143"></a>00143     P7OUT |= BIT0;
<a name="l00144"></a>00144 
<a name="l00145"></a>00145     <span class="comment">// MMA to sleep mode</span>
<a name="l00146"></a>00146     P8OUT &amp;= ~BIT2;
<a name="l00147"></a>00147 
<a name="l00148"></a>00148     <span class="comment">// LCD turn of light</span>
<a name="l00149"></a>00149     P7OUT |= BIT6;
<a name="l00150"></a>00150 
<a name="l00151"></a>00151     <span class="comment">// IRDA disable</span>
<a name="l00152"></a>00152     P7DIR |= BIT7;
<a name="l00153"></a>00153     P7OUT |= BIT7;
<a name="l00154"></a>00154 
<a name="l00155"></a>00155     <span class="comment">// TX - low</span>
<a name="l00156"></a>00156     P4DIR |= BIT6;
<a name="l00157"></a>00157     P4OUT &amp;= ~BIT6;
<a name="l00158"></a>00158 
<a name="l00159"></a>00159     <span class="comment">// MMC card</span>
<a name="l00160"></a>00160     P3DIR |= (BIT0|BIT2);
<a name="l00161"></a>00161     P3OUT |= (BIT0|BIT2);
<a name="l00162"></a>00162 
<a name="l00163"></a>00163     <span class="comment">// LCD CS high - disable</span>
<a name="l00164"></a>00164     P4OUT |= 0x04;
<a name="l00165"></a>00165     <span class="comment">// LCD RESET</span>
<a name="l00166"></a>00166     P7OUT &amp;= ~BIT4;
<a name="l00167"></a>00167 
<a name="l00168"></a>00168     <span class="comment">// EXT port</span>
<a name="l00169"></a>00169     P1DIR |= 0x3E;  P1OUT &amp;= ~0x3E;
<a name="l00170"></a>00170     P2DIR |= 0xBF;  P2OUT &amp;= ~0xBF;
<a name="l00171"></a>00171     P3DIR |= 0xF0;  P3OUT &amp;= ~0xF0;
<a name="l00172"></a>00172     P4DIR |= 0x13;  P4OUT &amp;= ~0x13;
<a name="l00173"></a>00173     P5DIR |= 0xFF;  P5OUT &amp;= ~0xFF;
<a name="l00174"></a>00174     P6DIR |= 0x17;  P6OUT &amp;= ~0x17;
<a name="l00175"></a>00175     P8DIR |= 0xFF;  P8OUT &amp;= ~0xFF;
<a name="l00176"></a>00176     P9DIR |= 0xFF;  P9OUT &amp;= ~0xFF;
<a name="l00177"></a>00177     P10DIR |= 0xFF;  P10OUT &amp;= ~0xFF;
<a name="l00178"></a>00178 
<a name="l00179"></a>00179 }
<a name="l00180"></a>00180 
<a name="l00181"></a>00181 
</pre></div><hr size="1"><address style="align: right;"><small>Generated on Sun Oct 21 19:25:35 2007 for Sample MSP430-4619LCD Project by&nbsp;
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