mp_buzz [电子森林]

1.首先从machine库导入Pin和PWM，从utime库导入sleep.

from machine import Pin, PWM
from utime import sleep

2.初始化PWM(也就是脉宽调制)到管脚PIO(22)，并分配它为变量buzzer。

buzzer = PWM(Pin(22))

3.给变量buzzer分配一个频率属性，选择10到12,000之间的数值，数值越大音调越高，我们可以设定为500.

buzzer.freq(500)

4.将蜂鸣器对象的duty_u16属性设置为1000，这就能让蜂鸣器尽可能地响。更低的值更安静，0根本没有声音。

buzzer.duty_u16(1000)

5.设置1秒的延迟，然后将duty设置为0，这样声音就会停止。如果不这样做，即使程序执行完毕，嗡嗡声也会继续。

sleep(1)
buzzer.duty_u16(0)

最终的代码：

from machine import Pin, PWM
from utime import sleep
 
buzzer = PWM(Pin(22))
buzzer.freq(500)
buzzer.duty_u16(1000)
sleep(1)
buzzer.duty_u16(0)

因为你可以使用不同的频率，你可以创造一个完整的音符阵列。网上有一些音符频率的列表，其中许多可以追溯到Brett Hagman在Github上的Arduino音调库。我们将使用这些值创建一个列表，以便在代码早期播放任何歌曲。

1.在管脚PIO(22)上导入必要的库并初始化PWM。

from machine import Pin, PWM
from utime import sleep
 
buzzer = PWM(Pin(22))

2.使用下列值创建一个名为tones的字典。

tones = {
"B0": 31,
"C1": 33,
"CS1": 35,
"D1": 37,
"DS1": 39,
"E1": 41,
"F1": 44,
"FS1": 46,
"G1": 49,
"GS1": 52,
"A1": 55,
"AS1": 58,
"B1": 62,
"C2": 65,
"CS2": 69,
"D2": 73,
"DS2": 78,
"E2": 82,
"F2": 87,
"FS2": 93,
"G2": 98,
"GS2": 104,
"A2": 110,
"AS2": 117,
"B2": 123,
"C3": 131,
"CS3": 139,
"D3": 147,
"DS3": 156,
"E3": 165,
"F3": 175,
"FS3": 185,
"G3": 196,
"GS3": 208,
"A3": 220,
"AS3": 233,
"B3": 247,
"C4": 262,
"CS4": 277,
"D4": 294,
"DS4": 311,
"E4": 330,
"F4": 349,
"FS4": 370,
"G4": 392,
"GS4": 415,
"A4": 440,
"AS4": 466,
"B4": 494,
"C5": 523,
"CS5": 554,
"D5": 587,
"DS5": 622,
"E5": 659,
"F5": 698,
"FS5": 740,
"G5": 784,
"GS5": 831,
"A5": 880,
"AS5": 932,
"B5": 988,
"C6": 1047,
"CS6": 1109,
"D6": 1175,
"DS6": 1245,
"E6": 1319,
"F6": 1397,
"FS6": 1480,
"G6": 1568,
"GS6": 1661,
"A6": 1760,
"AS6": 1865,
"B6": 1976,
"C7": 2093,
"CS7": 2217,
"D7": 2349,
"DS7": 2489,
"E7": 2637,
"F7": 2794,
"FS7": 2960,
"G7": 3136,
"GS7": 3322,
"A7": 3520,
"AS7": 3729,
"B7": 3951,
"C8": 4186,
"CS8": 4435,
"D8": 4699,
"DS8": 4978
}

3.为你的歌曲创建一个音符列表(又名数组)。用字母P表示音乐中的停顿。每个音符都应该用引号括起来。

song = ["E5","G5","A5","P","E5","G5","B5","A5","P","E5","G5","A5","P","G5","E5"]

向在这个帖子上分享这段著名riff音符的人们致敬。

4.创建一个名为playtone的函数，可以使用任意频率并以最大音量播放。

def playtone(frequency):
    buzzer.duty_u16(1000)
    buzzer.freq(frequency)

5.创建一个名为bequiet的函数，通过将duty_u16更改为0来使蜂鸣器静音。

def bequiet():
    buzzer.duty_u16(0)

6.创建一个名为playsong的函数，您将使用它来遍历音符数组并播放每一个音符，或者在看到P时暂停。

def playsong(mysong):
    for i in range(len(mysong)):
        if (mysong[i] == "P"):
            bequiet()
        else:
            playtone(tones[mysong[i]])
        sleep(0.3)
    bequiet()

是这样的。首先，我们创建一个for循环来遍历myssong数组中的所有值。如果值等于P，则触发be quiet;如果值不等于P，则触发playtone。注意，playtone需要一个数字频率值，因此我们必须从音调列表中获取每个音符的数字。如果我们只是播放tone(myssong [i])，它将失败，因为它将尝试播放字符串“E5”，而不是频率659，这是它需要的整数。

对于每个音调或暂停，系统维持0.3秒的睡眠状态。如果你想要更快的节奏，你可以降低时间。如果你想要慢节奏，那就加快节奏。

7.使用song参数触发playsong函数。

playsong(song)

运行此代码时，您将听到蜂鸣器播放熟悉的旋律。完整的代码应该是这样的:

from machine import Pin, PWM
from utime import sleep
buzzer = PWM(Pin(15))
 
tones = {
"B0": 31,
"C1": 33,
"CS1": 35,
"D1": 37,
"DS1": 39,
"E1": 41,
"F1": 44,
"FS1": 46,
"G1": 49,
"GS1": 52,
"A1": 55,
"AS1": 58,
"B1": 62,
"C2": 65,
"CS2": 69,
"D2": 73,
"DS2": 78,
"E2": 82,
"F2": 87,
"FS2": 93,
"G2": 98,
"GS2": 104,
"A2": 110,
"AS2": 117,
"B2": 123,
"C3": 131,
"CS3": 139,
"D3": 147,
"DS3": 156,
"E3": 165,
"F3": 175,
"FS3": 185,
"G3": 196,
"GS3": 208,
"A3": 220,
"AS3": 233,
"B3": 247,
"C4": 262,
"CS4": 277,
"D4": 294,
"DS4": 311,
"E4": 330,
"F4": 349,
"FS4": 370,
"G4": 392,
"GS4": 415,
"A4": 440,
"AS4": 466,
"B4": 494,
"C5": 523,
"CS5": 554,
"D5": 587,
"DS5": 622,
"E5": 659,
"F5": 698,
"FS5": 740,
"G5": 784,
"GS5": 831,
"A5": 880,
"AS5": 932,
"B5": 988,
"C6": 1047,
"CS6": 1109,
"D6": 1175,
"DS6": 1245,
"E6": 1319,
"F6": 1397,
"FS6": 1480,
"G6": 1568,
"GS6": 1661,
"A6": 1760,
"AS6": 1865,
"B6": 1976,
"C7": 2093,
"CS7": 2217,
"D7": 2349,
"DS7": 2489,
"E7": 2637,
"F7": 2794,
"FS7": 2960,
"G7": 3136,
"GS7": 3322,
"A7": 3520,
"AS7": 3729,
"B7": 3951,
"C8": 4186,
"CS8": 4435,
"D8": 4699,
"DS8": 4978
}
 
song = ["E5","G5","A5","P","E5","G5","B5","A5","P","E5","G5","A5","P","G5","E5"]
 
def playtone(frequency):
    buzzer.duty_u16(1000)
    buzzer.freq(frequency)
 
def bequiet():
    buzzer.duty_u16(0)
 
def playsong(mysong):
    for i in range(len(mysong)):
        if (mysong[i] == "P"):
            bequiet()
        else:
            playtone(tones[mysong[i]])
        sleep(0.3)
    bequiet()
playsong(song)

onlinesequencer

James的Buzzmusic代码： <code python> “”“ Micropython (Raspberry Pi Pico) Plays music written on onlinesequencer.net through a passive piezo buzzer. Uses fast arpeggios with a single buzzer to simulate polyphony Also supports multiple buzzers at once for real polyphony https://github.com/james1236/buzzer_music ”“” from machine import Pin, PWM from math import ceil tones = { 'C0':16, 'C#0':17, 'D0':18, 'D#0':19, 'E0':21, 'F0':22, 'F#0':23, 'G0':24, 'G#0':26, 'A0':28, 'A#0':29, 'B0':31, 'C1':33, 'C#1':35, 'D1':37, 'D#1':39, 'E1':41, 'F1':44, 'F#1':46, 'G1':49, 'G#1':52, 'A1':55, 'A#1':58, 'B1':62, 'C2':65, 'C#2':69, 'D2':73, 'D#2':78, 'E2':82, 'F2':87, 'F#2':92, 'G2':98, 'G#2':104, 'A2':110, 'A#2':117, 'B2':123, 'C3':131, 'C#3':139, 'D3':147, 'D#3':156, 'E3':165, 'F3':175, 'F#3':185, 'G3':196, 'G#3':208, 'A3':220, 'A#3':233, 'B3':247, 'C4':262, 'C#4':277, 'D4':294, 'D#4':311, 'E4':330, 'F4':349, 'F#4':370, 'G4':392, 'G#4':415, 'A4':440, 'A#4':466, 'B4':494, 'C5':523, 'C#5':554, 'D5':587, 'D#5':622, 'E5':659, 'F5':698, 'F#5':740, 'G5':784, 'G#5':831, 'A5':880, 'A#5':932, 'B5':988, 'C6':1047, 'C#6':1109, 'D6':1175, 'D#6':1245, 'E6':1319, 'F6':1397, 'F#6':1480, 'G6':1568, 'G#6':1661, 'A6':1760, 'A#6':1865, 'B6':1976, 'C7':2093, 'C#7':2217, 'D7':2349, 'D#7':2489, 'E7':2637, 'F7':2794, 'F#7':2960, 'G7':3136, 'G#7':3322, 'A7':3520, 'A#7':3729, 'B7':3951, 'C8':4186, 'C#8':4435, 'D8':4699, 'D#8':4978, 'E8':5274, 'F8':5588, 'F#8':5920, 'G8':6272, 'G#8':6645, 'A8':7040, 'A#8':7459, 'B8':7902, 'C9':8372, 'C#9':8870, 'D9':9397, 'D#9':9956, 'E9':10548, 'F9':11175, 'F#9':11840, 'G9':12544, 'G#9':13290, 'A9':14080, 'A#9':14917, 'B9':15804 } #Time, Note, Duration, Instrument (onlinesequencer.net schematic format) #0 D4 8 0;0 D5 8 0;0 G4 8 0;8 C5 2 0;10 B4 2 0;12 G4 2 0;14 F4 1 0;15 G4 17 0;16 D4 8 0;24 C4 8 0 class music: def init(self, songString='0 D4 8 0', looping=True, tempo=3, duty=2512, pin=None, pins=[Pin(0)]): self.tempo = tempo self.song = songString self.looping = looping self.duty = duty
self.stopped = False
self.timer = -1 self.beat = -1 self.arpnote = 0
self.pwms = []
if (not (pin is None)): pins = [pin]
i = 0 for pin in pins: self.pwms.append(PWM(pins[i])) i = i + 1
self.notes = [] self.playingNotes = [] self.playingDurations = [] #Find the end of the song self.end = 0 splitSong = self.song.split(“;”) for note in splitSong: snote = note.split(“ ”) testEnd = round(float(snote[0])) + ceil(float(snote[2])) if (testEnd > self.end): self.end = testEnd
#Create empty song structure while (self.end > len(self.notes)): self.notes.append(None) #Populate song structure with the notes for note in splitSong: snote = note.split(“ ”) beat = round(float(snote[0]));
if (self.notes[beat] == None): self.notes[beat] = [] self.notes[beat].append([snote[1],ceil(float(snote[2]))]) #Note, Duration #Round up end of song to nearest bar self.end = ceil(self.end / 8) * 8
def stop(self): for pwm in self.pwms: pwm.deinit() self.stopped = True
def tick(self): if (not self.stopped): self.timer = self.timer + 1
#Loop if (self.timer % (self.tempo * self.end) == 0 and (not (self.timer == 0))): if (not self.looping): self.stop() return False self.beat = -1 self.timer = 0
#On Beat if (self.timer % self.tempo == 0): self.beat = self.beat + 1 #Remove expired notes from playing list i = 0 while (i < len(self.playingDurations)): self.playingDurations[i] = self.playingDurations[i] - 1 if (self.playingDurations[i] ⇐ 0): self.playingNotes.pop(i) self.playingDurations.pop(i) else: i = i + 1
#Add new notes and their durations to the playing list
“”“ #Old method runs for every note, slow to process on every beat and causes noticeable delay ssong = song.split(”;“) for note in ssong: snote = note.split(” “) if int(snote[0]) == beat: playingNotes.append(snote[1]) playingDurations.append(int(snote[2])) ”“”
if (self.beat < len(self.notes)): if (self.notes[self.beat] != None): for note in self.notes[self.beat]: self.playingNotes.append(note[0]) self.playingDurations.append(note[1])
#Only need to run these checks on beats i = 0 for pwm in self.pwms: if (i >= len(self.playingNotes)): pwm.dutyu16(0)

                  else:
                      #Play note
                      pwm.duty_u16(self.duty)
                      pwm.freq(tones[self.playingNotes[i]])
                  i = i + 1

          #Play arp of all playing notes
          if (len(self.playingNotes) > len(self.pwms)):
              self.pwms[len(self.pwms)-1].duty_u16(self.duty)
              if (self.arpnote > len(self.playingNotes)-len(self.pwms)):
                  self.arpnote = 0
              self.pwms[len(self.pwms)-1].freq(tones[self.playingNotes[self.arpnote+(len(self.pwms)-1)]])
              self.arpnote = self.arpnote + 1
              
          return True
      else:
          return False

</code>

这是本文档旧的修订版！

用蜂鸣器播放音乐

1. 编程蜂鸣器

2. 播放音乐

3. 可以在线制作Buzz音乐的工具

电子森林

**这是本文档旧的修订版！**

用蜂鸣器播放音乐

1. 编程蜂鸣器

2. 播放音乐

3. 可以在线制作Buzz音乐的工具

这是本文档旧的修订版！