Pasky’s Log

#include "pitches.h"
 
/* Cue Star Wars - Darth Vader theme, opening notes! */
int melody_nak[] = { NOTE_G5, NOTE_G5, NOTE_G5, NOTE_DS5, NOTE_AS5, NOTE_G5, NOTE_DS5, NOTE_AS5, NOTE_G5};
int noteDurations_nak[] = { 330, 330, 330, 250, 120, 330, 250, 120, 500 };
 
int melody_ack[] = { NOTE_D6, NOTE_A6, NOTE_C7, NOTE_A6 };
int noteDurations_ack[] = { 120, 500, 120, 500 };
 
void toneManual(int pin, int frequency, int duration)
{
  unsigned long period = 1000000/frequency;
  unsigned long length;
  boolean state = false;
  for (length = 0; length < (long) duration * 1000; length += period) {
    state = !state;
    digitalWrite(pin, state);
    /* The 50uS correspond to the time the rest of the loop body takes.
     * It seems about right, but has not been tuned precisely for
     * a 16MHz ATMega. */
    delayMicroseconds(period - 50);
  }
}
 
void playMelody(int *melody, int *noteDurations, int notes)
{
  int i;
  for (i = 0; i < notes; i++) {
    toneManual(8, melody[i], noteDurations[i]);
    delay(noteDurations[i] * 6/10);
  }
}
 
void playMelodyAck()
{ playMelody(melody_ack, noteDurations_ack, sizeof(melody_ack)/sizeof(melody_ack[0])); }
void playMelodyNak()
{ playMelody(melody_nak, noteDurations_nak, sizeof(melody_nak)/sizeof(melody_nak[0])); }