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Web CGI HTML搭建物联网模型

分类： LINUX

2012-07-13 18:55:06

/************************HTML文件*********************/

点击(此处)折叠或打开

  1. <html>
  2. <head>
  3.     <meta http-equiv="content-type" content="text/html; charset=utf-8" />
  4. <title>LED测试</title>
  5.   <script language="JavaScript">
  6.     function loadLEDStatus() {
  7.         var xmlhttp = null;
  8.         if(window.XMLHttpRequest)
  9.             xmlhttp = new XMLHttpRequest();
  10.         else if(window.ActiveXObject)
  11.             xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
  12.         xmlhttp.open("GET", "/cgi-bin/getled.cgi", false);
  13.         xmlhttp.setRequestHeader("If-Modified-Since", "0");
  14.         xmlhttp.onreadystatechange=function() {
  15.             if(xmlhttp.readyState != 4 || xmlhttp.status != 200)
  16.                 return;
  17.             document.getElementById("myDiv").innerHTML = xmlhttp.responseText;
  18.             var value = new Array();
  19.             value = xmlhttp.responseText.split(",");
  20.             //document.write(value);
  21.             var i;
  22.             for(i = 0; i < 3; i ) {
  23.                 var img = document.getElementById("led" i);
  24.                 if(value[i] == "1") {
  25.                     img.src = "led_on.jpg";
  26.                 } else {
  27.                     img.src = "led_off.jpg";
  28.                 }
  29.             }
  30.         }
  31.         xmlhttp.send();
  32.     }
  33.     function switchLED(led,on_off) {
  34.         var url="/cgi-bin/setled.cgi?" led;
  35.         if(on_off) {
  36.             url = url "=1";
  37.         } else{
  38.             url = url "=0";
  39.         }
  40.         var xmlhttp = null;
  41.         if(window.XMLHttpRequest)
  42.             xmlhttp = new XMLHttpRequest();
  43.         else if(window.ActiveXObject)
  44.             xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
  45.             
  46.         xmlhttp.open("GET", url, false);
  47.         xmlhttp.setRequestHeader("If-Modified-Since", "0");

  49.         //xmlhttp.onreadystatechange = function() {
  50.         //     if(xmlhttp.readyState != 4 || xmlhttp.status != 200)
  51.         //        return;
  52.         //    document.getElementById("myDiv").innerHTML = xmlhttp.responseText;
  53.         //}
  54.         xmlhttp.send();
  55.         loadLEDStatus();
  56.     }
  57. </script>
  58. </head>
  59. <body onLoad="loadLEDStatus();">

  61.     <div id="myDiv">
  62.     <h2>Let AJAX change this text</h2>
  63.     </div>
  64.     
  65.     <form>
  66.     <table align="center" summary="">
  67.     <tr>
  68.     <td colspan="3" align="center"><h1>LED 测试</h1></td>
  69.     </tr>
  70.     <tr>
  71.     <td align="center">
  72.         <img src="led_off.jpg" id="led0" width=30 height=30 alt="led1"/>
  73.     </td>
  74.     <td align="center"><img src="led_off.jpg" id="led1" width=30 height=30 alt="led2"/></td>
  75.     <td align="center"><img src="led_off.jpg" id="led2" width=30 height=30 alt="led3"/></td>
  76.     </tr>
  77.     <tr>
  78.     <td align="center"><input type="button" id="led0_btn" value="关闭" onClick="switchLED('led0',0);"/></td>
  79.     <td align="center"><input type="button" id="led1_btn" value="关闭" onClick="switchLED('led1',0);"/></td>
  80.     <td align="center"><input type="button" id="led2_btn" value="关闭" onClick="switchLED('led2',0);"/></td>
  81.     </tr>
  82.     <tr>
  83.     <td align="center"><input type="button" id="led0_btn" value="打开" onClick="switchLED('led0',1);"/></td>
  84.     <td align="center"><input type="button" id="led1_btn" value="打开" onClick="switchLED('led1',1);"/></td>
  85.     <td align="center"><input type="button" id="led2_btn" value="打开" onClick="switchLED('led2',1);"/></td>
  86.     </tr>
  87.     </table>
  88.     </form>
  89. </body>
  90. </html>

/***********************CGI文件(setled.c)*****************************/

点击(此处)折叠或打开

  1. #include<stdio.h>
  2. #include<unistd.h>
  3. #include <stdlib.h>
  4. #include<sys/types.h>
  5. #include<string.h>
  6. #include<sys/stat.h>
  7. #include<sys/ioctl.h>
  8. #include<fcntl.h>
  9. #include"gpio.h"

  11. int deal_with(int num,int value,int led)
  12. {
  13.     if(value == 1)
  14.      led |= 0x01 << num;
  15.      if(value == 0)
  16.      led &= ~(0x01 << num);
  17.      return led;
  18. }

  20. int main(int argc,char *argv[])
  21. {
  22.     int led_fd;
  23.     char *data;
  24.     char led;
  25.     int num=0,value=0;
  26.     
  27.     data = getenv("QUERY_STRING");    
  28.     printf("%s\r\n\r\n","Content-Type:text/html");

  30.     led_fd = open("/dev/gpgdriver",O_RDWR);
  31.     ioctl(led_fd,GPIO_CFG_PIN_OUT,GPIO_PIN_AREA(0,2));
  32.     
  33.     sscanf(data,"led%d=%d",&num,&value);
  34.     read(led_fd,&led,1);
  35.     led=deal_with(num,value,led);
  36.     write(led_fd,&led,1);
  37.     
  38.     //printf("%s
    "    ,data);
  39.     close(led_fd);
  40.     return 0;
  41. }
/**************************CGI(getled.c)*******************************/

点击(此处)折叠或打开

  1. #include<stdio.h>
  2. #include<unistd.h>
  3. #include<sys/types.h>
  4. #include<sys/stat.h>
  5. #include<fcntl.h>
  6. #include <sys/ioctl.h>
  7. #include"gpio.h"

  9. int main()
  10. {
  11.     int led_fd;
  12.     char value=0;
  13.     char led0, led1, led2;
  14.     led_fd = open("/dev/gpgdriver",O_RDWR);
  15.     ioctl(led_fd,GPIO_CFG_PIN_OUT,GPIO_PIN_AREA(0,2));
  16.     
  17.     read(led_fd,&value,1);
  18.     printf("%s\r\n\r\n","Content-Type:text/html");
  19.     //printf("1111
    "    );
  20. /*
  21.     if (value & 0x01)
  22.     {
  23.         led0 = '1';
  24.     }
  25.     else
  26.     {
  27.         led0 = '0';
  28.     }
  29.     if (value & 0x02)
  30.     {
  31.         led1 = '1';
  32.     }
  33.     else
  34.     {
  35.         led1 = '0';
  36.     }
  37.     if (value & 0x04)
  38.     {
  39.         led2 = '1';
  40.     }
  41.     else
  42.     {
  43.         led2 = '0';
  44.     }
  45.     printf("%c,%c,%c,\n",led0,led1,led2);
  46. */

  48.     value=value & 0x07;
  49.     
  50.     if(value == 0x00)
  51.         printf("%c,%c,%c,",'0','0','0');
  52.     else if(value == 0x01)
  53.         printf("%c,%c,%c,",'1','0','0');
  54.     else if(value == 0x02)
  55.         printf("%c,%c,%c",'0','1','0');
  56.     else if(value == 0x03)
  57.         printf("%c,%c,%c,",'1','1','0');
  58.     else if(value == 0x04)
  59.         printf("%c,%c,%c",'0','0','1');
  60.     else if(value == 0x05)
  61.         printf("%c,%c,%c,",'1','0','1');
  62.     else if(value == 0x06)
  63.         printf("%c,%c,%c",'0','1','1');
  64.     else if(value == 0x07)
  65.         printf("%c,%c,%c,",'1','1','1');
  66.     printf("%d
    "    ,value);

  68.     close(led_fd);
  69.     return 0;
  70. }


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