cannot import name Timer

[xsyz]

PWM示例代码，报错cannot import name Timer

# PWM Control Example
#
# This example shows how to do PWM with your OpenMV Cam.

import time
from pyb import Pin, Timer

tim = Timer(4, freq=1000) # Frequency in Hz
# Generate a 1KHz square wave on TIM4 with 50% and 75% duty cycles on channels 1 and 2, respectively.
ch1 = tim.channel(1, Timer.PWM, pin=Pin("P7"), pulse_width_percent=50)
ch2 = tim.channel(2, Timer.PWM, pin=Pin("P8"), pulse_width_percent=75)

while (True):
    time.sleep(1000)

[kidswong999]

请提供你的硬件版本，固件版本。

[xsyz]

固件3.15.0-
OpenMV IDE2.2.0

[kidswong999]

硬件版本，是OpenMV2还是OpenMV3还是OpenMV4。

[xsyz]

@kidswong999 OpenMV3

[kidswong999]

我使用OpenMV3没有出现错误。

请升级到最新的固件，如果解决不了，联系售后维修。

[ytnk]

我也是一样的问题。 求解