usart_8c.html

avr32100.zip Embedded demo

<a name="l00527"></a>00527 
<a name="l00528"></a>00528         <span class="keywordflow">while</span> (((ret = <a class="code" href="usart_8c.html#ada9ca86fda25626da4a1c4b1e723682">usart_read_char</a>(usart, &amp;c)) == <a class="code" href="usart_8h.html#deb9432170d2d09a4ffbb098a1b4335e">USART_RX_EMPTY</a>)) {
<a name="l00529"></a>00529         }
<a name="l00530"></a>00530 
<a name="l00531"></a>00531         <span class="keywordflow">if</span> (ret == <a class="code" href="usart_8h.html#ffa1a7abf4e6ce54c0b64cc0826f8b4d">USART_RX_ERROR</a>)
<a name="l00532"></a>00532                 <span class="keywordflow">return</span> -1;
<a name="l00533"></a>00533         <span class="keywordflow">else</span>
<a name="l00534"></a>00534                 <span class="keywordflow">return</span> c;
<a name="l00535"></a>00535 }
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<a class="anchor" name="54b39126c57d8c1511a1f199b681a8eb"></a><!-- doxytag: member="usart.c::usart_init_handshaking" ref="54b39126c57d8c1511a1f199b681a8eb" args="(volatile struct avr32_usart_t *usart, struct usart_options_t *opt, long cpu_hz, int software_handshaking, char xon_char, char xoff_char)" -->
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          <td class="memname">int usart_init_handshaking           </td>
          <td>(</td>
          <td class="paramtype">volatile struct avr32_usart_t *&nbsp;</td>
          <td class="paramname"> <em>usart</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">struct <a class="el" href="structusart__options__t.html">usart_options_t</a> *&nbsp;</td>
          <td class="paramname"> <em>opt</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">long&nbsp;</td>
          <td class="paramname"> <em>cpu_hz</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int&nbsp;</td>
          <td class="paramname"> <em>software_handshaking</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">char&nbsp;</td>
          <td class="paramname"> <em>xon_char</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">char&nbsp;</td>
          <td class="paramname"> <em>xoff_char</em></td><td>&nbsp;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td><td width="100%"></td>
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<p>
Definition at line <a class="el" href="usart_8c-source.html#l00220">220</a> of file <a class="el" href="usart_8c-source.html">usart.c</a>.
<p>
References <a class="el" href="usart_8c-source.html#l00152">usart_init_rs232()</a>, <a class="el" href="usart_8h-source.html#l00258">USART_INVALID_INPUT</a>, <a class="el" href="usart_8h-source.html#l00294">USART_MODE_HW_HSH</a>, <a class="el" href="usart_8h-source.html#l00304">USART_MODE_SW_HSH</a>, and <a class="el" href="usart_8h-source.html#l00253">USART_SUCCESS</a>.<div class="fragment"><pre class="fragment"><a name="l00223"></a>00223 {
<a name="l00224"></a>00224         <span class="keywordtype">int</span> retval;
<a name="l00225"></a>00225 
<a name="l00226"></a>00226         <span class="comment">/* First: Setup standard RS323 */</span>
<a name="l00227"></a>00227         <span class="keywordflow">if</span> ((retval = <a class="code" href="usart_8c.html#48c8d76fc9fdde84b94a6e09184a6446">usart_init_rs232</a>(usart, opt, cpu_hz)) != <a class="code" href="usart_8h.html#cbf846773f58a382f10f8daf94797059">USART_SUCCESS</a>)
<a name="l00228"></a>00228                 <span class="keywordflow">return</span> retval;
<a name="l00229"></a>00229 
<a name="l00230"></a>00230         <span class="keywordflow">if</span> (software_handshaking == 0)
<a name="l00231"></a>00231         {
<a name="l00232"></a>00232                 <span class="comment">/* Clear previous mode */</span>
<a name="l00233"></a>00233                 usart-&gt; mr &amp;= ~(0xf &lt;&lt; AVR32_USART_MR_MODE_OFFSET);
<a name="l00234"></a>00234                 <span class="comment">/* Hardware handshaking */</span>
<a name="l00235"></a>00235                 usart-&gt; mr |= (<a class="code" href="usart_8h.html#20f58bd59d4177ad2981c8fa338a95af">USART_MODE_HW_HSH</a> &lt;&lt; AVR32_USART_MR_MODE_OFFSET);
<a name="l00236"></a>00236         }
<a name="l00237"></a>00237         <span class="keywordflow">else</span> <span class="keywordflow">if</span> (software_handshaking == 1)
<a name="l00238"></a>00238         {
<a name="l00239"></a>00239                 <span class="comment">/* Clear previous mode */</span>
<a name="l00240"></a>00240                 usart-&gt; mr &amp;= ~(0xf &lt;&lt; AVR32_USART_MR_MODE_OFFSET);
<a name="l00241"></a>00241                 <span class="comment">/* Software handshaking */</span>
<a name="l00242"></a>00242                 usart-&gt; mr |= (<a class="code" href="usart_8h.html#1af49d7b84d7323c6842945413559e94">USART_MODE_SW_HSH</a> &lt;&lt; AVR32_USART_MR_MODE_OFFSET);
<a name="l00243"></a>00243                 <span class="comment">/* Set XON and XOFF characters */</span>
<a name="l00244"></a>00244                 usart-&gt;xxr = (xon_char &lt;&lt; AVR32_USART_XXR_XON_OFFSET) |
<a name="l00245"></a>00245                              (xoff_char &lt;&lt; AVR32_USART_XXR_XOFF_OFFSET);
<a name="l00246"></a>00246         }
<a name="l00247"></a>00247         <span class="keywordflow">else</span>
<a name="l00248"></a>00248                 <span class="keywordflow">return</span> <a class="code" href="usart_8h.html#50b4e9378f434da8823badca3af2f15d">USART_INVALID_INPUT</a>;
<a name="l00249"></a>00249 
<a name="l00250"></a>00250         <span class="keywordflow">return</span> <a class="code" href="usart_8h.html#cbf846773f58a382f10f8daf94797059">USART_SUCCESS</a>;
<a name="l00251"></a>00251 }
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<a class="anchor" name="8db29da20412777c74c322d0fae89ecb"></a><!-- doxytag: member="usart.c::usart_init_IrDA" ref="8db29da20412777c74c322d0fae89ecb" args="(volatile struct avr32_usart_t *usart, struct usart_options_t *opt, long cpu_hz, unsigned char irda_filter)" -->
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          <td class="memname">int usart_init_IrDA           </td>
          <td>(</td>
          <td class="paramtype">volatile struct avr32_usart_t *&nbsp;</td>
          <td class="paramname"> <em>usart</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">struct <a class="el" href="structusart__options__t.html">usart_options_t</a> *&nbsp;</td>
          <td class="paramname"> <em>opt</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">long&nbsp;</td>
          <td class="paramname"> <em>cpu_hz</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">unsigned char&nbsp;</td>
          <td class="paramname"> <em>irda_filter</em></td><td>&nbsp;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td><td width="100%"></td>
        </tr>
      </table>
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<p>
Definition at line <a class="el" href="usart_8c-source.html#l00261">261</a> of file <a class="el" href="usart_8c-source.html">usart.c</a>.
<p>
References <a class="el" href="usart_8c-source.html#l00152">usart_init_rs232()</a>, and <a class="el" href="usart_8h-source.html#l00253">USART_SUCCESS</a>.<div class="fragment"><pre class="fragment"><a name="l00263"></a>00263 {
<a name="l00264"></a>00264         <span class="keywordtype">int</span> retval;
<a name="l00265"></a>00265 
<a name="l00266"></a>00266         <span class="comment">/* First: Setup standard RS323 */</span>
<a name="l00267"></a>00267         <span class="keywordflow">if</span> ((retval = <a class="code" href="usart_8c.html#48c8d76fc9fdde84b94a6e09184a6446">usart_init_rs232</a>(usart, opt, cpu_hz)) != <a class="code" href="usart_8h.html#cbf846773f58a382f10f8daf94797059">USART_SUCCESS</a>)
<a name="l00268"></a>00268                 <span class="keywordflow">return</span> retval;
<a name="l00269"></a>00269 
<a name="l00270"></a>00270         <span class="comment">/* Set IrDA counter */</span>
<a name="l00271"></a>00271         usart-&gt;ifr = irda_filter;
<a name="l00272"></a>00272 
<a name="l00273"></a>00273         <span class="comment">/* Activate "low-pass filtering" of input */</span>
<a name="l00274"></a>00274         usart-&gt;mr |= (1 &lt;&lt; AVR32_USART_MR_FILTER_OFFSET);
<a name="l00275"></a>00275         <span class="keywordflow">return</span> <a class="code" href="usart_8h.html#cbf846773f58a382f10f8daf94797059">USART_SUCCESS</a>;
<a name="l00276"></a>00276 }
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<a class="anchor" name="8e201d6c020402a4b2864d67ae8f4935"></a><!-- doxytag: member="usart.c::usart_init_iso7816" ref="8e201d6c020402a4b2864d67ae8f4935" args="(volatile struct avr32_usart_t *usart, const struct iso7816_options_t *opt, int t, const long cpu_hz)" -->
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          <td class="memname">int usart_init_iso7816           </td>
          <td>(</td>
          <td class="paramtype">volatile struct avr32_usart_t *&nbsp;</td>
          <td class="paramname"> <em>usart</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">const struct <a class="el" href="structiso7816__options__t.html">iso7816_options_t</a> *&nbsp;</td>
          <td class="paramname"> <em>opt</em>, </td>
        </tr>