from machine import Pin, PWM
import time

buzzer = PWM(Pin(15))
buzzer.duty_u16(32768)

tones = {
    'C':  262,
    'D':  294,
    'E':  330,
    'F':  349,
    'G':  392,
    'A':  440,
    'B':  494,
    'C5': 523
}

melody = ['C', 'D', 'E', 'F', 'G', 'A', 'B', 'C5']

print("演奏開始")

for note in melody:
    freq = tones[note]
    print(f"Note: {note}, Freq: {freq}Hz")
    buzzer.freq(freq)
    time.sleep(0.5)

print("停止")
buzzer.duty_u16(0)