stateExample-06-01.ino

//Millis example
//Coded during class - Interaction Lab
//NYUSH IMA
//Mar 5 2024

int val;
int prevVal;
long startTime;
int state = 0;

void setup() {
  Serial.begin(9600);
  pinMode(2, INPUT);
  pinMode(8, OUTPUT);
}

void loop() {
  if (state == 0) {
    state0();
  } else if (state == 1) {
    state1();
  } else if (state == 2) {
    state2();
  }

  delay(10);
}



/* change all these placeholders according to what you need*/

void state0() {
  if (millis() < 1000) {
    tone(8, 262);
  }
  if (millis() > 1000 && millis() < 2000) {
    tone(8, 330);
  }
  if (millis() > 2000 && millis() < 3000) {
    tone(8, 392);
  }
  if (millis() > 3000) {
    noTone(8);
    state = 1;
  }
}

void state1() {
  tone(8, random(100, 1100));
  delay(100);

  if (digitalRead(2) == HIGH) {
    // transition
    state = 2;
  }
}

void state2() {
  makeNoise();
  readButton();
}



/* makeNoise is a function that does beep every sec*/

void makeNoise() {
  if (millis() % 1000 < 10) {
    //Serial.println("one second passed");
    tone(8, 392, 100);
  }
  if ((millis() % 1000 < 110) && (millis() % 1000 > 100)) {
    noTone(8);
  }
}


/* readButton is a function that checks the button input*/
void readButton() {

  val = digitalRead(2);

  if (prevVal == LOW && val == HIGH) {
    Serial.println("Pressed");
    startTime = millis();
  }
  if (prevVal == HIGH && val == LOW) {
    Serial.print("Released after ");
    Serial.println(millis() - startTime);
  }
  prevVal = val;
}