cgi_8c-source.html

针对AVR单片机开发的嵌入式操作系统

00174 }
00175 <span class="comment"></span>
00176 <span class="comment">/*!</span>
00177 <span class="comment"> * \brief Print HTML code to display a single I/O port.</span>
00178 <span class="comment"> *</span>
00179 <span class="comment"> * The resulting HTML code will present a row of LEDs and two rows of</span>
00180 <span class="comment"> * checkboxes. While the LEDs show the current port status, the checkboxes</span>
00181 <span class="comment"> * may be used to modify the port output and the data direction register.</span>
00182 <span class="comment"> *</span>
00183 <span class="comment"> * See HtmlLedRow() for further details about how LEDs are displayed.</span>
00184 <span class="comment"> * The checkboxes are created by calling HtmlCheckboxRow().</span>
00185 <span class="comment"> *</span>
00186 <span class="comment"> * \param stream HTML code is printed to this stream device.</span>
00187 <span class="comment"> * \param name   Port identifier, typically 'A' for Port A, 'B' for port B etc.</span>
00188 <span class="comment"> * \param pin    Contents of the PIN register.</span>
00189 <span class="comment"> * \param port   Contents of the PORT register.</span>
00190 <span class="comment"> * \param ddr    Contents of the data direction register.</span>
00191 <span class="comment"> * \param enable If a bit is not set in this bit mask, then the corresponding</span>
00192 <span class="comment"> *               checkboxes are not created and the port bits and data direction</span>
00193 <span class="comment"> *               can't be modified.</span>
00194 <span class="comment"> */</span>
<a name="l00195"></a><a class="code" href="group__xg_c_g_i.html#ga7">00195</a> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="group__xg_c_g_i.html#ga7">HtmlInOutPortRow</a>(FILE * stream, <span class="keywordtype">char</span> name, u_char pin, u_char port, u_char ddr, u_char enable)
00196 {
00197     <span class="keywordtype">char</span> ditem[3] = { <span class="charliteral">'D'</span>, <span class="charliteral">'X'</span>, 0 };
00198     <span class="keywordtype">char</span> pitem[3] = { <span class="charliteral">'P'</span>, <span class="charliteral">'X'</span>, 0 };
00199 
00200     ditem[1] = name;
00201     pitem[1] = name;
00202     fputs(<span class="stringliteral">"&lt;tr&gt;&lt;th rowspan=\"4\"&gt;"</span>, stream);
00203     fprintf(stream, <span class="stringliteral">"%c"</span>, name);
00204     fputs(<span class="stringliteral">"&lt;/th&gt;&lt;td&gt;Status&lt;/td&gt;"</span>, stream);
00205     <a class="code" href="group__xg_c_g_i.html#ga4">HtmlLedRow</a>(stream, 8, 1, pin, port, ddr);
00206     fputs(<span class="stringliteral">"&lt;/tr&gt;\r\n&lt;tr&gt;&lt;td&gt;Output&lt;/td&gt;"</span>, stream);
00207     <a class="code" href="group__xg_c_g_i.html#ga5">HtmlCheckboxRow</a>(stream, 8, 1, ditem, ddr, enable);
00208     fputs(<span class="stringliteral">"&lt;/tr&gt;\r\n&lt;tr&gt;&lt;td&gt;Pull up&lt;/td&gt;"</span>, stream);
00209     <a class="code" href="group__xg_c_g_i.html#ga5">HtmlCheckboxRow</a>(stream, 8, 1, pitem, port, enable);
00210     fputs(<span class="stringliteral">"&lt;/tr&gt;\r\n"</span>, stream);
00211 }
00212 <span class="comment"></span>
00213 <span class="comment">/*!</span>
00214 <span class="comment"> * \brief Process request parameters for CPU port control.</span>
00215 <span class="comment"> *</span>
00216 <span class="comment"> * Parse the CGI query and perform the corresponding action:</span>
00217 <span class="comment"> *</span>
00218 <span class="comment"> * - Dx=y will set bit y in the data direction register of port x.</span>
00219 <span class="comment"> * - Px=y will set bit y in the port output register of port x.</span>
00220 <span class="comment"> *</span>
00221 <span class="comment"> * All other bits are switched off.</span>
00222 <span class="comment"> *</span>
00223 <span class="comment"> * \param query CGI query string.</span>
00224 <span class="comment"> */</span>
<a name="l00225"></a><a class="code" href="group__xg_c_g_i.html#ga8">00225</a> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="group__xg_c_g_i.html#ga8">ProcessCgiPortRequest</a>(REQUEST * req)
00226 {
00227     u_char ddrb = 0;
00228     u_char portb = 0;
00229     u_char ddrd = 0;
00230     u_char portd = 0;
00231     u_char ddre = 0;
00232     u_char porte = 0;
00233     <span class="keywordtype">int</span> mods = 0;
00234     <span class="keywordtype">int</span> i;
00235     <span class="keywordtype">int</span> pcount = NutHttpGetParameterCount(req);
00236     <span class="keywordtype">char</span> *name;
00237     <span class="keywordtype">char</span> *value;
00238 
00239     <span class="keywordflow">for</span> (i = 0; i &lt; pcount; i++) {
00240         name = NutHttpGetParameterName(req, i);
00241         value = NutHttpGetParameterValue(req, i);
00242         <span class="keywordflow">if</span> (strcmp(name, <span class="stringliteral">"DB"</span>) == 0) {
00243             ddrb |= BV(*value - <span class="charliteral">'0'</span>);
00244             mods++;
00245         } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (strcmp(name, <span class="stringliteral">"PB"</span>) == 0) {
00246             portb |= BV(*value - <span class="charliteral">'0'</span>);
00247             mods++;
00248         } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (strcmp(name, <span class="stringliteral">"DD"</span>) == 0) {
00249             ddrd |= BV(*value - <span class="charliteral">'0'</span>);
00250             mods++;
00251         } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (strcmp(name, <span class="stringliteral">"PD"</span>) == 0) {
00252             portd |= BV(*value - <span class="charliteral">'0'</span>);
00253             mods++;
00254         } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (strcmp(name, <span class="stringliteral">"DE"</span>) == 0) {
00255             ddre |= BV(*value - <span class="charliteral">'0'</span>);
00256             ddre &amp;= ~_BV(5);
00257             mods++;
00258         } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (strcmp(name, <span class="stringliteral">"PE"</span>) == 0) {
00259             porte |= BV(*value - <span class="charliteral">'0'</span>);
00260             porte &amp;= ~_BV(5);
00261             mods++;
00262         }
00263     }
00264     <span class="keywordflow">if</span> (mods) {
00265         outb(DDRB, ddrb);
00266         outb(PORTB, portb);
00267         outb(DDRD, ddrd);
00268         outb(PORTD, portd);
00269         outb(DDRE, ddre);
00270         outb(PORTE, porte);
00271     }
00272 }
00273 <span class="comment"></span>
00274 <span class="comment">/*!</span>
00275 <span class="comment"> * \brief Process request parameters for relay output control.</span>
00276 <span class="comment"> *</span>
00277 <span class="comment"> * Parse the CGI query and switch the corresponding relays.</span>
00278 <span class="comment"> * 'S=y' will switch on relay y. All other relays are switched off.</span>
00279 <span class="comment"> *</span>
00280 <span class="comment"> * Note, that before calling this function is called for the first time,</span>
00281 <span class="comment"> * the status of the relays is unknown.</span>
00282 <span class="comment"> *</span>
00283 <span class="comment"> * \param query CGI query string.</span>
00284 <span class="comment"> */</span>
<a name="l00285"></a><a class="code" href="group__xg_c_g_i.html#ga9">00285</a> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="group__xg_c_g_i.html#ga9">ProcessCgiRelayRequest</a>(<span class="keywordtype">char</span> *query)
00286 {
00287     u_char *item = query;
00288     u_char *val;
00289 
00290     <a class="code" href="group__xg_c_g_i.html#ga2">relay_status</a> = 0;
00291     <span class="keywordflow">for</span> (;;) {
00292         <span class="keywordflow">if</span> ((val = strchr(item, <span class="charliteral">'='</span>)) == 0)
00293             <span class="keywordflow">break</span>;
00294         *val++ = 0;
00295         <span class="keywordflow">if</span> (item[0] == <span class="charliteral">'S'</span>)
00296             <a class="code" href="group__xg_c_g_i.html#ga2">relay_status</a> |= 1UL &lt;&lt; (7 - (*val - <span class="charliteral">'0'</span>));
00297         <span class="keywordflow">if</span> ((item = strchr(val, <span class="charliteral">'&amp;'</span>)) == 0)
00298             <span class="keywordflow">break</span>;
00299         item++;
00300     }
00301     SpiDigitalSet(<a class="code" href="group__xg_c_g_i.html#ga1">spi_no</a>, <a class="code" href="group__xg_c_g_i.html#ga2">relay_status</a>);
00302     <a class="code" href="group__xg_c_g_i.html#ga3">relay_known</a> = 1;
00303 }
00304 <span class="comment"></span>
00305 <span class="comment">/*!</span>
00306 <span class="comment"> * \brief CGI callback function to control the CPU ports.</span>
00307 <span class="comment"> *</span>
00308 <span class="comment"> * Creates HTML code to show the status of CPU ports B, D, E and F</span>
00309 <span class="comment"> * plus a HTML form to modify the port and data direction registers </span>
00310 <span class="comment"> * of ports B, D and E by checkboxes. </span>
00311 <span class="comment"> *</span>
00312 <span class="comment"> * The resulting HTML code is send back to the browser. If the submit</span>
00313 <span class="comment"> * button is clicked on this page, this function will be called again</span>
00314 <span class="comment"> * to process the checkboxes.</span>
00315 <span class="comment"> *</span>
00316 <span class="comment"> * \image html cport.gif</span>
00317 <span class="comment"> *</span>
00318 <span class="comment"> *</span>
00319 <span class="comment"> *</span>
00320 <span class="comment"> * This function is called by the HTTP module when a browser requests</span>
00321 <span class="comment"> * a CGI function, for which this routine has been registered via</span>
00322 <span class="comment"> * NutRegisterCgi().</span>
00323 <span class="comment"> *</span>
00324 <span class="comment"> * \param stream Stream of the HTTP connection.</span>
00325 <span class="comment"> * \param req    Pointer to the CGI REQUEST structure. Detailed information</span>
00326 <span class="comment"> *               is available in the Nut/OS API documentation.</span>
00327 <span class="comment"> *</span>
00328 <span class="comment"> * \return 0 on success or -1 in case of any failure.</span>
00329 <span class="comment"> */</span>
<a name="l00330"></a><a class="code" href="group__xg_c_g_i.html#ga10">00330</a> <span class="keywordtype">int</span> <a class="code" href="group__xg_c_g_i.html#ga10">CpuPortControl</a>(FILE * stream, REQUEST * req)
00331 {
00332     <span class="keyword">static</span> prog_char head[] = <span class="stringliteral">"&lt;html&gt;"</span>  <span class="comment">/* */</span>
00333         <span class="stringliteral">"&lt;head&gt;"</span>                <span class="comment">/* */</span>
00334         <span class="stringliteral">"&lt;meta http-equiv=\"expires\" content=\"0\"&gt;"</span>   <span class="comment">/* */</span>
00335         <span class="stringliteral">"&lt;title&gt;Ethernut CPU Port Control&lt;/title&gt;"</span>      <span class="comment">/* */</span>
00336         <span class="stringliteral">"&lt;/head&gt;"</span>               <span class="comment">/* */</span>
00337         <span class="stringliteral">"&lt;body bgcolor=\"#C7D0D9\"&gt;&lt;a href=\"/\"&gt;"</span>      <span class="comment">/* */</span>
00338         <span class="stringliteral">"&lt;img src=\"/enmini.gif\" border=\"0\" width=\"70\" height=\"17\"&gt;"</span>     <span class="comment">/* */</span>
00339         <span class="stringliteral">"&lt;/a&gt;&lt;div align=\"center\"&gt;"</span>;
00340     <span class="keyword">static</span> prog_char thdr[] = <span class="stringliteral">"&lt;form action=\""</span> <a class="code" href="group__xg_w_p_defs.html#ga8">PORT_CONTROL_CGI</a>        <span class="comment">/* */</span>
00341         <span class="stringliteral">"\" enctype=\"text/plain\"&gt;"</span>    <span class="comment">/* */</span>
00342         <span class="stringliteral">"&lt;table border=\"1\" cellspacing=\"0\"&gt;\r\n"</span>    <span class="comment">/* */</span>
00343         <span class="stringliteral">"&lt;thead&gt;&lt;tr&gt;&lt;th rowspan=\"2\"&gt; PORT &lt;/th&gt;"</span>      <span class="comment">/* */</span>
00344         <span class="stringliteral">"&lt;th rowspan=\"2\"&gt; Type &lt;/th&gt;"</span> <span class="comment">/* */</span>
00345         <span class="stringliteral">"&lt;th colspan=\"8\"&gt;Bit&lt;/th&gt;&lt;/tr&gt;"</span>       <span class="comment">/* */</span>
00346         <span class="stringliteral">"&lt;tr&gt;&lt;th&gt;7&lt;/th&gt;&lt;th&gt;6&lt;/th&gt;&lt;th&gt;5&lt;/th&gt;&lt;th&gt;4&lt;/th&gt;&lt;th&gt;3&lt;/th&gt;"</span>        <span class="comment">/* */</span>
00347         <span class="stringliteral">"&lt;th&gt;2&lt;/th&gt;&lt;th&gt;1&lt;/th&gt;&lt;th&gt;0&lt;/th&gt;&lt;/tr&gt;"</span>   <span class="comment">/* */</span>
00348         <span class="stringliteral">"&lt;/thead&gt;&lt;tfoot&gt;\r\n"</span>;
00349     <span class="keyword">static</span> prog_char foot[] = <span class="stringliteral">"&lt;/tfoot&gt;&lt;/table&gt;&lt;br&gt;"</span>    <span class="comment">/* */</span>
00350         <span class="stringliteral">" &lt;input type=\"submit\" value=\" Set \"&gt; "</span>     <span class="comment">/* */</span>
00351         <span class="stringliteral">" &lt;input type=\"reset\" value=\" Cancel \"&gt; "</span>   <span class="comment">/* */</span>
00352         <span class="stringliteral">"&lt;/form&gt;\r\n&lt;/div&gt;&lt;/body&gt;\r\n&lt;/html&gt;"</span>;
00353 
00354     NutHttpSendHeaderTop(stream, req, 200, <span class="stringliteral">"Ok"</span>);
00355     NutHttpSendHeaderBot(stream, <span class="stringliteral">"text/html"</span>, -1);
00356 
00357     fputs_P(head, stream);
00358     <span class="keywordflow">if</span> (req-&gt;req_url)
00359         <a class="code" href="group__xg_c_g_i.html#ga8">ProcessCgiPortRequest</a>(req);