week11

播歌

void setup() {

  for(int i=2;i<=13;i++){

    pinMode(i, OUTPUT);

  }

}

void loop() {

  for(int i=2;i<=13;i++){

    digitalWrite( i, HIGH);

    delay(300);

  }

  for(int i=2;i<=13;i++){

    digitalWrite( i, LOW);

  }

}int piezoPin = 8;
int length = 15;
char notes[] = "ccggaag ffeeddc ggffeed ggffeed ccggaag ffeeddc ";      // a space represents a rest
int beats[] = { 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 4 };
int tempo = 300;

void playTone(int tone, int duration)
{
  for (long i = 0; i < duration * 1000L; i += tone * 2)
  {
    digitalWrite(piezoPin, HIGH);
    delayMicroseconds(tone);
    digitalWrite(piezoPin, LOW);
    delayMicroseconds(tone);
  }
}

void playNote(char note, int duration)
{
  char names[] = { 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C' };
  int tones[] = { 1915, 1700, 1519, 1432, 1275, 1136, 1014, 956 };
  for (int i = 0; i < 8; i++)
  {
    if (names[i] == note)
    {
      playTone(tones[i], duration);
    }
  }
}

void setup()
{
  pinMode(piezoPin, OUTPUT);
}

void loop()
{
  for (int i = 0; i < length; i++)
  {
    if (notes[i] == ' ')
    {
      delay(beats[i] * tempo);
    } else
      playNote(notes[i], beats[i] * tempo);
    delay(tempo / 2);
  }
}