@kidswong999 那如果程序一定要用浮点数有什么解决办法吗

from pyb import Pin, Timer
import time

p = Pin('P7') # P7 has TIM4 and CH1
while(1):
    tim = Timer(4,freq=50)
    ch = tim.channel(1, Timer.PWM, pin=p)
    ch.pulse_width_percent(7.5)
    time.sleep_ms(6000)