Diff: FTSE100.cpp

Revision:

1:10d951807d06

Parent:

0:60eb2e98d56c

Child:

2:0fa458722bc3

--- a/FTSE100.cpp	Wed Jul 06 10:20:18 2011 +0000
+++ b/FTSE100.cpp	Wed Jul 06 12:24:53 2011 +0000
@@ -13,7 +13,7 @@
     printf("Start\n\r");
     printf("\r\nSetting up...\r\n");
     
-    EthernetErr ethErr = eth.setup();                                           //Setup ethernet connection
+    EthernetErr ethErr = eth.setup();                   //Setup ethernet connection
     if(ethErr) { 
         printf("Error %d in setup.\n\r", ethErr);
         return -1;
@@ -22,28 +22,28 @@
     
     db.cls();
     
-    HTTPText txt;                                                            //instantiate HTTPStream object
+    HTTPText txt;                                       //instantiate HTTPStream object
     while(1){
         HTTPResult r = http.get("http://www.mbed.webatu.com/dispBoBApp.php", &txt);   //load page into buffer
         if(r==HTTP_OK){
-            string str = txt.gets();                                            //fetch string and store in str
+            string str = txt.gets();                    //fetch string and store in str
              
-            size_t length;                                                      //make some variables
+            size_t length;                              //make some variables
             char buffer[20];
              
-            size_t found=str.find("<");                                    //tell me where < first appears
+            size_t found=str.find("<");                 //tell me where '<' first appears
             if(found!=string::npos){   
-                length=str.copy(buffer,int(found),0);
-                buffer[length]='\0';
-                string dispString = buffer;
-                db.scroll("FTSE100", 0.2);
+                length=str.copy(buffer,int(found),0);   //copy everything from start of string up until '<' character and return length
+                buffer[length]='\0';                    //null terminate my buffer
+                string dispString = buffer;             //convert buffer from type char* to string
+                db.scroll("FTSE100", 0.2);              //scroll "FTSE100" across the screen
                 db.locate(0);
-                db.printf("%s", dispString);    
+                db.printf("%s", dispString);            //then print FTSE100 value to screen
             }   
         } else {
-            pc.printf("Error\n\r");
+            pc.printf("Error\n\r");                     //just in case
         }
-        wait(2);
+        wait(2);                                        //wait 2 seconds before looping, so we don't pester the servers too much
     }
 }