Project 5 - Controlling Traffic

// Project 5 - Controlling Traffic

// ==Page 3==


// define the pins that the buttons and lights are connected to:
#define westButton   35
#define eastButton   39
#define westRed      43
#define westYellow   47
#define westGreen    51
#define eastRed      45
#define eastYellow   49
#define eastGreen    53
#define yellowBlinkTime 500                     // 0.1 seconds for yellow light blink
boolean trafficWest = true;                     // west = true, east = false
int flowTime = 10000;                           // amount of time to let traffic flow
int changeDelay = 2000;                         // amount of time between color changes


void setup()
{
    pinMode(westButton, INPUT);
    pinMode(eastButton, INPUT);
    pinMode(westRed, OUTPUT);
    pinMode(westYellow, OUTPUT);
    pinMode(westGreen, OUTPUT);
    pinMode(eastRed, OUTPUT);
    pinMode(eastYellow, OUTPUT);
    pinMode(eastGreen, OUTPUT);

// set initial state for lights - west side is green first

    digitalWrite(westRed, LOW);
    digitalWrite(westYellow, LOW);
    digitalWrite(westGreen, HIGH);
    digitalWrite(eastRed, HIGH);
    digitalWrite(eastYellow, LOW);
    digitalWrite(eastGreen, LOW);
}

void loop()
{
  if ( digitalRead(eastButton) == HIGH )     //changing from west to east
  {
    if ( trafficWest == true )
    {
    trafficWest = false;
    delay(flowTime);
    digitalWrite(westGreen, LOW);
    digitalWrite(westYellow, HIGH);
    delay(changeDelay);
    for ( int a = 0 ; a < 5 ; a++ )
    {
      digitalWrite(westYellow, LOW);
      delay(yellowBlinkTime);
      digitalWrite(westYellow, HIGH);
      delay(yellowBlinkTime);
    }
    digitalWrite(westYellow, LOW);
    digitalWrite(westRed, HIGH);
    digitalWrite(eastRed, LOW);
    digitalWrite(eastGreen, HIGH);    //traffic now east
    }
  }
  if ( digitalRead(westButton) == HIGH )   //changing from east to west
  {
    if ( trafficWest != true )
    {
    trafficWest = true;
    delay(flowTime);
    digitalWrite(eastGreen, LOW);
    digitalWrite(eastYellow, HIGH);
    delay(changeDelay);
    for ( int a = 0; a < 5; a++ )
    {
      digitalWrite(eastYellow, LOW);
      delay(yellowBlinkTime);
      digitalWrite(eastYellow, HIGH);
      delay(yellowBlinkTime);
    }
    digitalWrite(eastYellow, LOW);
    digitalWrite(eastRed, HIGH);
    digitalWrite(westRed, LOW);
    digitalWrite(westGreen, HIGH);    //traffic now west
    }
  }
}