概要
子ども向けのプログラミング教育プロジェクトの一環として、Adoのクラクラをコーディングしてみました。
ソースコード
main.py
from machine import Pin, PWM
from utime import sleep
# 演奏中ならTrue, 演奏していない時はFalse
is_playing = False
# スケール(melodyの中で使っている音階)
scale = []
# BPM
bpm = 60
# LED
led_pins = [0, 2, 3, 9, 10, 1, 11, 12]
leds = [Pin(pin, Pin.OUT, value=1) for pin in led_pins]
# NPNトランジスタのベース
buzzer = PWM(Pin(15))
# 再生ボタン
playing_button = Pin(13, Pin.IN, Pin.PULL_DOWN)
# 停止ボタン
stop_button = Pin(14, Pin.IN, Pin.PULL_DOWN)
def stop(pin):
global is_playing
is_playing = False
stop_button.irq(trigger=Pin.IRQ_RISING, handler=stop)
# 音階周波数
REST= 0
C3, Db3, D3, Eb3, E3, F3, Gb3, G3, Ab3, A3, Bb3, B3 = 131, 139, 147, 156, 165, 175, 185, 196, 208, 220, 233, 247
C4, Db4, D4, Eb4, E4, F4, Gb4, G4, Ab4, A4, Bb4, B4 = 262, 277, 294, 311, 330, 349, 370, 392, 415, 440, 466, 494
C5, Db5, D5, Eb5, E5, F5, Gb5, G5, Ab5, A5, Bb5, B5 = 523, 554, 587, 622, 659, 698, 740, 784, 831, 880, 932, 988
C6, Db6, D6, Eb6, E6, F6, Gb6, G6, Ab6, A6, Bb6, B6 =1047,1109,1175,1245,1319,1397,1480,1568,1661,1760,1865,1976
def turn_on_led(index=None):
"""
LEDを点灯する。
"""
if index is None:
for led in leds:
led.value(0)
else:
leds[index].value(0)
def turn_off_led(index=None):
"""
LEDを消灯する。
"""
if index is None:
for led in leds:
led.value(1)
else:
leds[index].value(1)
def tone(frequency, duration):
"""
パッシブブザーで音を鳴らす。
Parameters:
frequency(int): 周波数
duration(int): 音符の音の長さ(四分音符なら4、八分音符なら8)
"""
beat = 60 / bpm
duration = beat * 4 / duration
if frequency == REST:
turn_on_led()
sleep(duration)
turn_off_led()
return
index = scale.index(frequency) % 8
turn_on_led(index)
buzzer.freq(frequency)
buzzer.duty_u16(30000)
sleep(duration)
buzzer.duty_u16(0)
sleep(0.002)
turn_off_led(index)
def kurakura():
"""
クラクラ
"""
global is_playing
global bpm
global scale
# BPMを更新する
bpm = 188
# メロディーを定義する
melody = [
[G5,8],[Ab5,8],[Bb5,4],[G5,8],[Ab5,8],[Bb5,4],[G5,8],[Ab5,8],[Bb5,4],[Ab5,4],[G5,8],[F5,8],[Eb5,8],[REST,8],
[Bb5,4],[G5,8],[Ab5,8],[Bb5,4],[G5,8],[Ab5,8],[Bb5,4],[Ab5,4],[G5,8],[F5,8],[Eb5,8],[REST,8],
[C5,4],[D5,8],[Eb5,8],[F5,4],[G5,8],[Ab5,8],[Bb5,4],[G5,8],[F5,8],[Eb5,8],[REST,8],
[Eb5,8],[F5,8],[G5,4],[Ab5,8],[G5,8],[Ab5,8],[G5,8],[F5,8],[Eb5,8],[F5,4/2.5],[REST,8],
[G5,8],[Ab5,8],[Bb5,4],[G5,8],[Ab5,8],[Bb5,4],[G5,8],[Ab5,8],[Bb5,4],[Ab5,4],[G5,8],[F5,8],[Eb5,8],[REST,8],
[Bb5,4],[G5,8],[Bb5,4],[Bb5,4],[Bb5,8],[G5,8],[Bb5,8],[C6,8],[D6,8],[Eb6,4],
[Eb5,4],[Eb6,4],[D6,8],[C6,8],[Bb5,8],[REST,8],
[Eb5,8],[Eb5,8],[C6,4],[Bb5,8],[Ab5,8],[Bb5,8],[REST,8],
[Eb5,8],[Eb5,8],[Bb5,4],[Ab5,8],[Gb5,8],[F5,8],[REST,8],[Db5,4],[Eb5,4/1.5],[Bb3,8],[Eb4,8],[F4,8],
[C6,8],[D6,8],[Eb6,4],[D6,8],[C6,8],[Bb5,8],[REST,8],
[Eb5,8],[Eb5,8],[C6,4],[Bb5,8],[Ab5,8],[Bb5,8],[REST,8],
[Eb5,8],[Eb5,8],[Bb5,4],[Ab5,8],[Gb5,8],[F5,8],[REST,8],
[Db5,4],[Eb5,4],[Bb5,8],[Db5,4],[Eb5,4],[REST,8],
[C5,4],[C5,8],[Bb4,4],[C5,4],[REST,4]
]
# スケールを更新する
unique_elements = []
for note in melody:
if note[0] not in unique_elements and note[0] != REST:
unique_elements.append(note[0])
scale = sorted(unique_elements)
# 演奏を開始する
is_playing = True
turn_off_led()
for m in melody:
if is_playing:
tone(m[0], m[1])
else:
break
index = 0
while True:
turn_on_led(index)
if playing_button.value() == 1:
kurakura()
sleep(0.1)
turn_off_led(index)
if index < 7:
index += 1
else:
index = 0
メロディーメイカーの作り方
動画で作り方を解説しています。