openmv的p7 或p8口好像坏了一个 ，控制不了舵机，我想用p9代替坏的那个，该怎么改代码啊

[nvfd]

from pyb import Pin, Timer#导入引脚和定时器
inverse_left=False #change it to True to inverse left wheel 初始化
inverse_right=False #change it to True to inverse right wheel 初始化

ain1 = Pin('P0', Pin.OUT_PP)#控制左右两边电机方向
ain2 = Pin('P1', Pin.OUT_PP)
bin1 = Pin('P2', Pin.OUT_PP)
bin2 = Pin('P3', Pin.OUT_PP)
ain1.low()
ain2.low()
bin1.low()
bin2.low()

pwma = Pin('P7')
pwmb = Pin('P8')
tim = Timer(4, freq=1000)#设置定时器4 频率为1000hz
ch1 = tim.channel(1, Timer.PWM, pin=pwma)
ch2 = tim.channel(2, Timer.PWM, pin=pwmb)
ch1.pulse_width_percent(0)
ch2.pulse_width_percent(0)

def run(left_speed, right_speed):
if inverse_left==False: #如果接反了正负 就取反修正
left_speed=(-left_speed)
if inverse_right==True:# 同上
right_speed=(-right_speed)

if left_speed < 0:
    ain1.low()
    ain2.high()
else:
    ain1.high()
    ain2.low()
ch1.pulse_width_percent(int(abs(left_speed)))

if right_speed < 0:
    bin1.low()
    bin2.high()
else:
    bin1.high()
    bin2.low()
ch2.pulse_width_percent(int(abs(right_speed)))

[kidswong999]

14，15行，把P7，或者P8，改成P9就行了。