/*
Getting serial port information in the form of characters G, A, B, or C, and playing that
pitch on a piezo disk.
 */

int val = 0;
int val1 = 0;
int led = 13;
int piezo1 = 3;
int pulso = 0;

// the setup routine runs once when you press reset:
void setup() {
  // initialize serial communication at 9600 bits per second:
  Serial.begin(9600);
  pinMode(led, OUTPUT);
  pinMode(piezo1, OUTPUT);
}

void loop() {
  val = Serial.available();
  if (val > 0) {
    //// read x value of abs
    val1 = Serial.read();
    if (val1 == 'G') {
      pulso = 2551; //pulso == amount of time (microseconds) in half a Period of the waveform. 
    }
    if (val1 == 'A') {
      pulso = 2272;
    }
    if (val1 == 'B') {
      pulso = 2024;
    }
    if (val1 == 'C') {
      pulso = 1915;
    } 
    if (val1 == 'Z') {
      pulso = 0;
    }     
  }
  digitalWrite(piezo1, HIGH);
  delayMicroseconds(pulso);
  digitalWrite(piezo1, LOW);
  delayMicroseconds(pulso);
  
}