buzzer
--- 蜂鸣器模块¶
buzzer
模块的主要功能与函数
功能相关函数¶
-
buzzer.
play_note
(note_num, beat = None)¶ 播放音符, 数字音符定义请参考: scratch数字音符说明,参数:
- note_num 数值型,数值范围
48 - 72
,或者字符串类型,如C4
。 - beat 数值数据,表示节拍数,如果不填,则一直播放。
音符与频率的对应关系如下:
['C2','65'], ['D2','73'], ['E2','82'], ['F2','87'], ['G2','98'], ['A2','110'], ['B2','123'], ['C3','131'], ['D3','147'], ['E3','165'], ['F3','175'], ['G3','196'], ['A3','220'], ['B3','247'], ['C4','262'], ['D4','294'], ['E4','330'], ['F4','349'], ['G4','392'], ['A4','440'], ['B4','494'], ['C5','523'], ['D5','587'], ['E5','659'], ['F5','698'], ['G5','784'], ['A5','880'], ['B5','988'], ['C6','1047'], ['D6','1175'], ['E6','1319'], ['F6','1397'], ['G6','1568'], ['A6','1760'], ['B6','1976'], ['C7','2093'], ['D7','2349'], ['E7','2637'], ['F7','2794'], ['G7','3136'], ['A7','3520'], ['B7','3951'], ['C8','4186'], ['D8','4699'],
- note_num 数值型,数值范围
-
buzzer.
play_tone
(frequency, time = None)¶ 播放设定频率的声音,参数:
- frequency 数值数据,播放声音的频率,其数值范围是
0 ~ 5000
。 - time 数值数据,表示播放时间(单位是
毫秒-ms
),其数值范围是0 ~ 数值范围极限
。
- frequency 数值数据,播放声音的频率,其数值范围是
-
buzzer.
rest
(number)¶ 停止节拍,参数:
- number 数值数据,暂停的节拍数,其数值范围是
0 ~ 数值范围极限
。
- number 数值数据,暂停的节拍数,其数值范围是
常量¶
-
buzzer.
tempo
¶ 数值数据,数值范围是
6 ~ 600
,表示播放速度的属性,单位是bmp(beat per minute)
,即每一个节拍的长度。 默认数值是60,即一个节拍的维持时间是1秒。rest
和play_note
函数的节拍会受该常量影响。
程序示例:¶
import codey
import time
import neurons
codey.display.show("hello")
neurons.buzzer.play_note(48, 1)
neurons.buzzer.rest(1)
codey.display.show("note")
codey.display.clear()
neurons.buzzer.play_note("C4", 1)
neurons.buzzer.rest(1)
codey.display.show("C4")
codey.display.clear()
neurons.buzzer.play_tone(1000, 2)
neurons.buzzer.rest(1)
codey.display.show("tone")
codey.display.clear()
while True:
neurons.buzzer.tempo = 60
print("tempo:", end = "")
print(neurons.buzzer.tempo)
neurons.buzzer.play_note("C4", 1)
neurons.buzzer.rest(2)
neurons.buzzer.tempo = 240
neurons.buzzer.play_note("C4", 1)
neurons.buzzer.rest(2)