Laser Harp Arduino Code

laser_harp.ino

int photoDiode1 = HIGH;
int photoDiode2 = HIGH;
int photoDiode3 = HIGH;
int photoDiode4 = HIGH;
int photoDiode5 = HIGH;
int photoDiode6 = HIGH;
int photoDiode7 = HIGH;

void setup() {
  Serial.begin(9600);
}

void loop() {
  photoDiode1 = digitalRead(3);
  photoDiode2 = digitalRead(4);
  photoDiode3 = digitalRead(5);
  photoDiode4 = digitalRead(6);
  photoDiode5 = digitalRead(7);
  photoDiode6 = digitalRead(8);
  photoDiode7 = digitalRead(9);

  printPhotoDiodeValues();

  writeMIDINotes();
//
//  //play notes from F#-0 (0x1E) to F#-5 (0x5A):
//  for (int note = 0x1E; note < 0x5A; note ++) {
//    //Note on channel 1 (0x90), some note value (note), middle velocity (0x45):
//    noteOn(0x90, note, 0x45);
//    delay(100);
//    //Note on channel 1 (0x90), some note value (note), silent velocity (0x00):
//    noteOn(0x90, note, 0x00);
//    delay(100);
//  }
}

void printPhotoDiodeValues() {
  // print photodiode values for debugging
  Serial.print("value 1: ");
  Serial.print(photoDiode1);
  Serial.print(", ");
  Serial.print("value 2: ");
  Serial.print(photoDiode2);
  Serial.print(", ");
  Serial.print("value 3: ");
  Serial.print(photoDiode3);
  Serial.print(", ");
  Serial.print("value 4: ");
  Serial.print(photoDiode4);
  Serial.print(", ");
  Serial.print("value 5: ");
  Serial.print(photoDiode5);
  Serial.print(", ");
  Serial.print("value 6: ");
  Serial.print(photoDiode6);
  Serial.print(", ");
  Serial.print("value 7: ");
  Serial.print(photoDiode7);
  Serial.println("");
}

void writeMIDINotes() {
  if (photoDiode1 == HIGH) {
    
  }

  if (photoDiode2 == HIGH) {
    
  }

  if (photoDiode3 == HIGH) {
    
  }

  if (photoDiode4 == HIGH) {
    
  }

  if (photoDiode5 == HIGH) {
    
  }

  if (photoDiode6 == HIGH) {
    
  }

  if (photoDiode7 == HIGH) {
    
  }
}

// plays a MIDI note. Doesn't check to see that cmd is greater than 127, or that
// data values are less than 127:
void noteOn(int cmd, int pitch, int velocity) {
  Serial.write(cmd);
  Serial.write(pitch);
  Serial.write(velocity);
}