Arduino Challenge 7

Challenge Name:
Happy Music

Author:
Joshua Mac

Credit:
Aron Graca, Kyle Chan, Si-weon Woo

Difficulty level:
4

Time to Complete:
30 Mins

Challenge description:
 To make music with the piezo element play faster.
Answer:

int speakerPin = 9;

int length = 15;

char notes[] = "ccggaagffeeddc ";

int beats[] = { 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 4};

int tempo = 100;

void playTone(int tone, int duration)

{

  for (long i = 0; i < duration * 1000L; i += tone * 2)

  {

    digitalWrite(speakerPin, HIGH);

    delayMicroseconds(tone);

    digitalWrite(speakerPin,LOW);

    

  }

}

void playNote(char note, int duration)

{

  char names[] = {'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C' };

  int tones[] = {1300, 1900, 1589, 1483, 1700, 1436, 1903, 912};

  for (int i = 0; i < 8; i++)

  {

    if (names[i] == note)

    {

      playTone(tones[i], duration);

    }

  }

}

void setup()

{

  pinMode(speakerPin, 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);

  }