from machine import Pin, PWM
import time

buzzer = PWM(Pin(25))  # 設定蜂鳴器腳位

# 定義音符頻率
C4 = 262
D4 = 294
E4 = 330
F4 = 349
G4 = 392
A4 = 440
B4 = 494
C5 = 523

# 旋律與節奏
melody = [
    G4, G4, A4, G4, C5, B4, 0,
    G4, G4, A4, G4, D5, C5, 0,
    G4, G4, G5, E5, C5, B4, A4, 0,
    F5, F5, E5, C5, D5, C5
]
beats = [
    0.5, 0.5, 1, 1, 1, 2, 1,
    0.5, 0.5, 1, 1, 1, 2, 1,
    0.5, 0.5, 1, 1, 1, 1, 2, 1,
    0.5, 0.5, 1, 1, 1, 2
]
beat_time = 0.3  # 每拍0.3秒

def play_note(freq, duration):
    if freq == 0:
        buzzer.duty(0)
    else:
        buzzer.freq(freq)
        buzzer.duty(512)
    time.sleep(duration)
    buzzer.duty(0)

def play_melody():
    for i in range(len(melody)):
        play_note(melody[i], beats[i] * beat_time)
        time.sleep(0.05)

while True:
    play_melody()
    time.sleep(2)

"""
【主要函數說明】
1. play_note(頻率, 時間)：播放一個音符。
2. play_melody()：依序播放整首旋律。
3. 0 代表休止符（不發聲）。
"""