#45190 9620 1494 83521
from machine import Pin, PWM
import time
key = Pin(27, Pin.IN, Pin.PULL_DOWN)
buzzer = PWM(Pin(4), freq = 1, duty = 128)

Do  = 523   # 简谱1
Re  = 587   # 简谱2
Mi  = 659   # 简谱3
Fa  = 698   # 简谱4
Sol = 784   # 简谱5
La  = 880   # 简谱6
Si  = 988   # 简谱7
Do1 = 1046  # 简谱高音1
# 万能播放音符函数（固定写法，不用改）
def play(freq, duty_time):
    buzzer.freq(freq)
    buzzer.duty(128)
    time.sleep(duty_time)
    buzzer.duty(0)
    time.sleep(0.05) # 音符之间的小停顿，不粘音，更好听

num = 0
duty_time = 0.3
while True:
    if key.value() == 1:
        time.sleep(0.1)
        if key.value() == 1:
            num += 1
            print(num)
            if num == 1:
                play(Do, duty_time)
            elif num == 2:
                play(Re, duty_time)            
            elif num == 3:
                play(Mi, duty_time)
            elif num == 4:
                play(Fa, duty_time)
            elif num == 5:
                play(Sol, duty_time)
            elif num == 6:
                play(La, duty_time)
            elif num == 7:
                play(Si, duty_time)
            else :
                play(Do1, duty_time)
                num = 0