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PWM占空比只能是整数。
如果我想输出一个周期20ms，0.5ms高电平的PWM怎么做呢？
import time from pyb import Pin, Timer tim = Timer(4, freq=50) ch1 = tim.channel(1, Timer.PWM, pin=Pin("P7")) pulse_width = int(tim.period()*0.125) ch1.pulse_width(pulse_width) while (True): time.sleep_ms(1000)
