LightCode.cpp

#include <mbed.h>

//Setup the LED1 pin to be a digial output called ledOne
DigitalOut carRed(LED3); //Driver Green
DigitalOut carAmber(LED2); //Driver Amber
DigitalOut carGreen(LED1); //Crossing Green
DigitalOut pedRed(D15); //Crossing Red (External LED, modify for online version)
DigitalOut pedGreen(D14);

InterruptIn button(BUTTON1);

int buttonState =0;
int programState = 0;

void handler(){
  //only Respond to button press if we are in state 0
  if (programState==0){
      programState+=1;
  }
  
}

void defaultState(){
    carRed = 0;
    carAmber = 0;
    carGreen = 1;
    pedRed = 1;
    pedGreen = 0;
    wait(5);
}


void stopping(){
    //We only need to update the car
    carRed = 1;
    carAmber =1;
    carGreen = 0;
    wait(2); // Wait for some arbatory length of time
    programState+=1;
}


void crossing(){
    carRed = 1;
    carAmber = 0;
    pedRed = 0;
    pedGreen = 1;
    wait(5); // Wait for some arbatory length of time
    programState+=1;
}


void endCrossing(){
    carRed = 0;
    for (int i=0; i<10; i++){
        pedGreen = 1;
        carAmber = 1;
        wait(0.5);
        pedGreen = 0;
        carAmber = 0;
        wait(0.5);
    }
    programState=0;
}


int main() {
  // put your setup code here, to run once:
    printf("Initialising\n");
    button.rise(&handler);

  while(1) {

    //Read the Button and change the state
    //if (button){
    //  buttonstate = !buttonstate;
    //}
    printf("Tick...%d\n", programState);
    
    switch( programState){
        
        
        case 1:
            stopping();  
            break;
        case 2:
            crossing();  
            break;
        case 3:
            endCrossing();  
            break;
        default:
            defaultState();
    }
    
    wait(1);
  }
}