Stoplight.pde

#define RED 5
#define YELLOW 6
#define GREEN 7
#define INDICATOR 13
#define BUTTONINTERRUPT 0 // This is pin 2 on the arduino board

#define BOUNCE_DURATION 30   // define an appropriate bounce time in ms for your switches

#define FLASH_DELAY 1000

int mode=1;
volatile int state=0;
volatile unsigned long bounceTime=0; // variable to hold ms count to debounce a pressed switch


void setup() {
  pinMode(RED, OUTPUT);
  pinMode(YELLOW, OUTPUT);
  pinMode(GREEN, OUTPUT);
  pinMode(INDICATOR, OUTPUT);
  attachInterrupt(BUTTONINTERRUPT, intHandler, RISING);
  mode = 1;
  state = 0;
}

void loop() {
  setMode();
  switch(mode) {
    case 1:
      stoplight();  
      break;
    case 2:
      flashingRed(FLASH_DELAY);
      break;
    case 3:
      flashingYellow(FLASH_DELAY);
      break;
    case 4:
      upAndDown(FLASH_DELAY);
      break;
    case 5:
      allOnThenOff(FLASH_DELAY);
      break; 
    case 6:
      allOn();
      break;   
  }

}


void stoplight() {
  digitalWrite(GREEN, HIGH);
  delay(60000);
  digitalWrite(GREEN, LOW);
  digitalWrite(YELLOW, HIGH);
  delay(10000);
  digitalWrite(YELLOW, LOW);
  digitalWrite(RED, HIGH);
  delay(60000);
  digitalWrite(RED, LOW);
  
}

void flashingRed(int flashDelay) {
  digitalWrite(RED, HIGH);
  delay(flashDelay);
  digitalWrite(RED, LOW);
  delay(flashDelay);
}

void flashingYellow(int flashDelay) {
  digitalWrite(YELLOW, HIGH);
  delay(flashDelay);
  digitalWrite(YELLOW, LOW);
  delay(flashDelay);
}

void upAndDown(int flashDelay) {
  digitalWrite(GREEN, HIGH);
  delay(flashDelay);
  digitalWrite(GREEN, LOW);
  digitalWrite(YELLOW, HIGH);
  delay(flashDelay);
  digitalWrite(YELLOW, LOW);
  digitalWrite(RED, HIGH);
  delay(flashDelay);
  digitalWrite(RED, LOW);
  digitalWrite(YELLOW, HIGH);
  delay(flashDelay);
  digitalWrite(YELLOW, LOW);
}

void allOnThenOff(int flashDelay) {
  digitalWrite(GREEN, HIGH);
  delay(flashDelay);
  digitalWrite(YELLOW, HIGH);
  delay(flashDelay);
  digitalWrite(RED, HIGH);
  delay(flashDelay);
  digitalWrite(RED, LOW);
  delay(flashDelay);
  digitalWrite(YELLOW, LOW);
  delay(flashDelay);
  digitalWrite(GREEN, LOW);
  delay(flashDelay);
}

void allOn() {
  digitalWrite(GREEN, HIGH);
  digitalWrite(YELLOW, HIGH);
  digitalWrite(RED, HIGH);
}

void resetLights() {
  digitalWrite(GREEN, HIGH);
  digitalWrite(YELLOW, HIGH);
  digitalWrite(RED, HIGH);
  delay(500);
  digitalWrite(GREEN, LOW);
  digitalWrite(YELLOW, LOW);
  digitalWrite(RED, LOW);
  digitalWrite(INDICATOR, LOW);
}

void setMode() {
  if(state > 0) {
    if (mode < 6) {
      mode++;
    } else {
      mode = 1;
    }
    resetLights();
    state = 0;
  }
}

//void buttonChange() {
//  digitalWrite(INDICATOR, HIGH);
//  state++;
//}

void intHandler(){
  // this is the interrupt handler for button presses
  // it ignores presses that occur in intervals less then the bounce time
  if (abs(millis() - bounceTime) > BOUNCE_DURATION)
  {
    digitalWrite(INDICATOR, HIGH);
    state++;
    bounceTime = millis();  // set whatever bounce time in ms is appropriate
 }
}