OSError: [Errno 22] Invalid argument when trying to run sample_pwm.py

[ScheglyakStas]

I'm trying to run sample_pwm.py on a Jetson Orin Nano Super Devkit. I've installed jetson-gpio from source, configured pins 15, 32, 33 as PWM via jetson-io.py, and set the udev rules. However, I am getting the following errors while trying to run sample_pwm.py, both via python3 and ./run_sample.sh:

OSError: [Errno 22] Invalid argument

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/stas/jetson-gpio/samples/simple_pwm.py", line 66, in <module>
    main()
  File "/home/stas/jetson-gpio/samples/simple_pwm.py", line 46, in main
    p = GPIO.PWM(output_pin, 50)
  File "/home/stas/jetson-gpio/lib/python/Jetson/GPIO/gpio.py", line 571, in __init__
    self._reconfigure(frequency_hz, 0.0)
  File "/home/stas/jetson-gpio/lib/python/Jetson/GPIO/gpio.py", line 614, in _reconfigure
    _set_pwm_period(self._ch_info, self._period_ns)
  File "/home/stas/jetson-gpio/lib/python/Jetson/GPIO/gpio.py", line 179, in _set_pwm_period
    with open(_pwm_period_path(ch_info), 'w') as f:
OSError: [Errno 22] Invalid argument

This error appears even if I use pins 15 or 32 instead of the default 33.
My Jetpack version is 6.2.2, and L4T version is 36.5.0.

[LuckyYoon]

I am having the same issue with PWM as well. Setting the frequency to anything above 195 Hz works, but the 50 Hz frequency shown in the sample_pwm.py throws the same invalid argument error. This problem seems similar to an issue opened in 2020: https://github.com/NVIDIA/jetson-gpio/issues/42#

[anhmiuhv]

let me check this

[chiaoooo6]

I encountered the same problem. Was it eventually resolved? Thank you.

[anhmiuhv]

I am checking with our hardware engineer for the hardware limitation. For now we have to set the frequency to 195Hz or higher