File content as of revision 4:0da8deb04107:

#include "mbed.h"



DigitalOut  PIN_RED(D8);
DigitalOut  PIN_AMBER(D9);
DigitalOut  PIN_GREEN(D10);
DigitalIn    p1(D0);   // representing sensor for people
DigitalIn    p2(D1);   
DigitalIn    p3(D2);   
DigitalIn    p4(D3);  
DigitalIn    c1(D4); // representing sensor for cars  
DigitalIn    c2(D5);   
DigitalIn    c3(D6);  
DigitalIn    c4(D7);    

// lights onboard for pedestrian 

DigitalOut ledR(LED_RED);
DigitalOut ledG(LED_GREEN);

// initiliasing variables

int count_p ;
int count_c;
Timer t;
bool pedestrian = false;


void Count(){
        count_p = 0;
        count_c = 0;
        
        if(p1 == 1){
            count_p = count_p + 1;
            
            if(t.read() == 0){
                t.start();
                }
            
            
            
           
            }
        if(p2 == 1){
            count_p = count_p + 1;
            
            if(t.read() == 0){
                t.start();
                }
                
            }
            
        if(p3 == 1){
            count_p = count_p + 1;
            
            if(t.read() == 0){
                t.start();
                }
                
            }
        if(p4 == 1){
            count_p = count_p + 1;
            
               if(t.read() == 0){
                t.start();
                }
                
            }
            
        if(c1 == 1){
            count_c = count_c + 1;
            }
        if(c2 == 1){
            count_c = count_c + 1;
            }
            
        if(c3 == 1){
            count_c = count_c + 1;
            }
        if(c4 == 1){
            count_c = count_c + 1;
            }
            
        
        
        
        }

void Red(){
    

    PIN_RED = 1;
    PIN_AMBER = 0;
    PIN_GREEN = 0;
        
        };
        
void Red_Amber(){
    
    PIN_RED = 1;
    PIN_AMBER = 1;
    PIN_GREEN = 0;
    
        
        };
        
void Amber(){

    PIN_RED = 0;
    PIN_AMBER = 1;
    PIN_GREEN = 0;
        
        }
        
        
void Green(){
    PIN_RED = 0;
    PIN_AMBER = 0;
    PIN_GREEN = 1;
        }
        
void Stop(){
    // when our changetraffic light function finishes at is green.. 
    Amber();
    wait(3);
    // turn off amber, then turn red on for 5 seconds
    Red();
        
    }
void Start(){
    
    
    }

        
    

        
void changeLights(){
 
    if(pedestrian == true){
            // red and amber on for 2 seconds ( red is already on though)
            Red_Amber();
            wait(2);
    
            // turn off red and amber, then turn on green
            Green();
            wait(3);
            pedestrian = false;
        }
    else {
        // green off, Amber on for 3 seconds
    Amber();
    wait(3);
    
    // turn off amber, then turn red on for 5 seconds
    Red();
    wait(5);
    
    // red and amber on for 2 seconds ( red is already on though)
    Red_Amber();
    wait(2);
    
    // turn off red and amber, then turn on green
    Green();
    wait(3);
        
        }
    
    
 
 
 
 }
 
 void P_Green(){
                
            ledR = 1;
            ledG = 0;
     
     }
 
void P_Red(){
                
            ledR = 0;
            ledG = 1;
     
     }
//void Fault(){
//    
//    Amber();
//    P_Red();
//    
//    while(true){
//        
//        
//    wait(0.5);
//    PIN_AMBER = 0;
//    ledR = 1;
//    wait(0.5);
//    PIN_AMBER = 1;
//    ledR = 0;
//    
//    }
//    
//}
 
 

int main()
{
 

            
        ledR = 0;
        ledG = 1;
        Green();
        wait(3);
        
        
        
        
    
       while (true) {
        
        pedestrian = false;
        
        // checks for count every 5 seconds
        
        wait(5);
        Count();

        if (count_p > count_c){
                Stop();
                P_Green();
                wait(20);
                P_Red();
                t.reset();
                //check variable for our changelight function 
                pedestrian = true;

            }
        else if (count_p > 0 & t.read() > 60){
                Stop();
                P_Green();
                wait(20);
                P_Red();
                t.reset();
                //check variable for our changelight function 
                pedestrian = true;
                
            }
            
            changeLights();

            
            
    
        }



    
    }