[作品提交] 【得捷电子Follow me第1期】任务2：蜂鸣器驱动

首先来一个简单的，变频率的蜂鸣器，声音会越来越尖锐。直接上程序吧，

import machine
from machine import Pin
import time

led = Pin("LED",Pin.OUT)
buzze = machine.Pin(26)
pwm1 = machine.PWM(buzze)

frep1 = 100

pwm1.freq(frep1)
pwm1.duty_u16(32768)

while True:
    led.value(1)
    frep1 += 100
    pwm1.freq(frep1)
    time.sleep(.25)
    led.value(0)
    time.sleep(.25)
    if frep1 > 2400:
        frep1 = 200

实验二，根据不同的频率对应音乐的不同音调，在其他网友的基础上改的一个《生日歌》

生日快乐歌的简谱见下图，我也不懂音律就不做解析了，按照上面的谱进行设置。

测试代码见下。

from machine import Pin, PWM
from time import sleep

buzzer = PWM(Pin(20))
vol = 1300  #音量大小
def DO(time):
    buzzer.freq(1046) #1
    buzzer.duty_u16(vol)
    sleep(time)
def RE(time):
    buzzer.freq(1175) #2
    buzzer.duty_u16(vol)
    sleep(time)
def MI(time):
    buzzer.freq(1318) #3
    buzzer.duty_u16(vol)
    sleep(time)
def FA(time):
    buzzer.freq(1397) #4
    buzzer.duty_u16(vol)
    sleep(time)
def SO(time):
    buzzer.freq(1568) #5
    buzzer.duty_u16(vol)
    sleep(time)
def LA(time):
    buzzer.freq(1760) #6
    buzzer.duty_u16(vol)
    sleep(time)
def SI(time):
    buzzer.freq(1967) #7
    buzzer.duty_u16(vol)
    sleep(time)
def N(time):
    buzzer.duty_u16(0) #close
    sleep(time)
while True:

    SO(0.17) #5
    N(0.01) #0
    SO(0.17) #5
    
    LA(0.33) #6
    SO(0.33) #5
    DO(0.33) #1
    N(0.01) #0
    
    SI(0.33) #7-
    N(0.01) #0
    SI(0.33) #7-    
    SO(0.33) #5
    
    LA(0.33) #6
    SO(0.33) #5
    RE(0.33) #2    
    N(0.01) #0
    
    DO(0.33) #1
    N(0.01) #0
    DO(0.33) #1
    SO(0.33) #5

    SO(0.33) #5
    MI(0.33) #3
    DO(0.33) #1    
    N(0.01) #0
    DO(0.33) #1

    SI(0.33) #7-
    LA(0.33) #6
    N(0.01) #0
    LA(0.33) #6
    
    N(0.01) #0        
    FA(0.33) #4
    N(0.01) #0
    FA(0.33) #4

    MI(0.33) #3
    RE(0.33) #2
    DO(0.33) #1    
    N(0.01) #0
    
    DO(0.33) #1    
    N(0.67) #0    

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