Failed to configure watchdog using python

Robotics & Edge Computing Jetson & Embedded Systems Jetson Xavier NX
1

I configured the hardware watchdog with the following python code. The watchdog started normally, but the timeout period set was invalid. At the same time, after the end of the program, the watchdog is not closed, but also cause the system to restart.
How do I use python to properly set the timeout and turn off the watchdog after the program ends?
thank you

code:
def enable_watchdog(device_path=‘/dev/watchdog’, timeout=15):
try:
# Open the hardware watchdog device file
watchdog = os.open(device_path, os.O_WRONLY)

    # Set the timeout period of the hardware watchdog in seconds
    timeout_command = f"timeout={timeout}"
    os.write(watchdog, timeout_command.encode())

    # Writes arbitrary data to enable hardware watchdog
    os.write(watchdog, b'\0')

    print(f"Hardware watchdog enabled. The system will be restarted if not refreshed within {timeout} seconds.")

    while True:
        # Refresh the hardware watchdog to prevent system restart
        os.write(watchdog, b'\0')
        time.sleep(timeout // 2)     # The refresh frequency is half of the timeout period
        
except Exception as e:
    print(f"Error: {e}")
finally:
    if watchdog:
        os.close(watchdog)
3

Could you try below code instead of pyton.

5

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