import pyb
p = pyb.Pin('P7') # P7 has TIM4, CH1
tim = pyb.Timer(4, freq=1000)
ch = tim.channel(1, pyb.Timer.PWM, pin=p)
ch.pulse_width_percent(50)
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使用pwm的时候串口终端输出版本号然后无法运行是怎么回事？要怎么解决？发布在 OpenMV Cam
import pyb
p = pyb.Pin('P7') # P7 has TIM4, CH1
tim = pyb.Timer(4, freq=1000)
ch = tim.channel(1, pyb.Timer.PWM, pin=p)
ch.pulse_width_percent(50)