main.cpp

00001 //This is known as a “header file”
00002 //In short, this copies and pastes the text file
00003 //mbed.h into this code
00004 #include "mbed.h"
00005 
00006 //Create a DigitalOut “object” called myled
00007 //Pass constant D7 as a “parameter”
00008 DigitalOut redLED(D7);
00009 DigitalOut yellowLED(D6);
00010 DigitalOut greenLED(D5);
00011 
00012 //The main function - all executable C / C++
00013 //applications have a main function. This is
00014 //out entry point in the software
00015 int main() {
00016 
00017     redLED = 0;
00018     yellowLED = 0;
00019     greenLED = 0;
00020 
00021 // ALL the code is contained in a 
00022 // “while loop"
00023 
00024 // THIS IS NOT AN IDEAL SOLUTION. HOWEVER IT IS SIMPLE
00025 
00026 
00027     while(1) 
00028     {
00029     //The code between the { curly braces }
00030     //is the code that is repeated
00031     
00032         //STATE 1 (R) 
00033         redLED = 1;
00034         yellowLED = 0;
00035         greenLED = 0;       
00036         wait(1.0);
00037         
00038         //STATE 2 (RA)
00039         yellowLED = 1;
00040         wait(1.0);
00041         
00042         //STATE 3 (G)
00043         redLED    = 0;
00044         yellowLED = 0;
00045         greenLED  = 1;
00046         wait(1.0);
00047         
00048         //STATE 4 (A)
00049         yellowLED = 1;
00050         greenLED  = 0;
00051         wait(0.25);      
00052         
00053         //STATE 5
00054         yellowLED = 0;
00055         wait(0.25);  
00056         
00057         //STATE 6
00058         yellowLED = 1;
00059         wait(0.25);  
00060         
00061         //STATE 7
00062         yellowLED = 0;
00063         wait(0.25);          
00064         
00065                         
00066     }
00067 }