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 
00025     while(1) 
00026     {
00027     //The code between the { curly braces }
00028     //is the code that is repeated
00029     
00030         //STATE 1 (R) 
00031         redLED = 1;
00032         yellowLED = 0;
00033         greenLED = 0;       
00034         wait(1.0);
00035         
00036         //STATE 2 (RA)
00037         yellowLED = 1;
00038         wait(1.0);
00039         
00040         //STATE 3 (G)
00041         redLED    = 0;
00042         yellowLED = 0;
00043         greenLED  = 1;
00044         wait(1.0);
00045         
00046         //STATE 4 (A)
00047         yellowLED = 1;
00048         greenLED  = 0;
00049         wait(1.0);        
00050     }
00051 }