/*
 * 
 * Simple (PWM) Oscillator with Trigger
 * 
 * A2 = pitch
 * A1 = note duration
 * A3 = trigger in
 * 
 * 
 */

bool triggered; // logic: trigered, yes or no
#define SPEAKER_PIN 11 
int noteDuration = 100;

void setup() {
  // set pin 11 as output
  pinMode(SPEAKER_PIN, OUTPUT);
  Serial.begin(9600); // debugging (see if trigger is registered)
}

void loop() {
    int input3 = digitalRead(A3); // read analog pin 3 (trigger)
    int noteDuration = analogRead(A1)/10; // read analog pin 1 (note duration)

    //  trigger 
    if(input3 && !triggered) {
    Serial.println("I hear a trigger!");
    Serial.println(noteDuration);
    
    for(int i=0;i<noteDuration;i++){  
        digitalWrite( SPEAKER_PIN, LOW );
        delayMicroseconds( analogRead(A2)*10); // wait 
        digitalWrite( SPEAKER_PIN, HIGH );
        delayMicroseconds( analogRead(A2)*10 ); // wait 
        triggered = true;
        delay(1); //playtime of the osc note: this numer * noteDuration milliseconds
    }
    

    }
    else if(!input3 && triggered) { //if there is no reading on input3 and condition triggered is true (aka sound is playing), set triggered to false, aka stop playing 
      // STOP WHEN NO TRIGGER IS PRESENT (or do something else ;)
      triggered = false;
 
    }

}