MCC152 python interrupt example code failed with exception "Could not enable callback function."

[Zhijang]

Any suggestion is welcome. Thanks in advance.

Here is the error message where tried 152 interrupt python example code:

 

./digital_input_interrupt.py 
MCC 152 digital input interrupt example.
Enables interrupts on the inputs and displays their state when
they change.
   Functions / Methods demonstrated:
      mcc152.dio_reset
      mcc152.dio_config_write_port
      mcc152.dio_input_read_port
      mcc152.dio_int_status_read_port
      mcc152.info
      interrupt_callback_enable
      interrupt_callback_disable

Using address 0.

Current input values are 0xFF
Waiting for changes, enter any text to exit. 
Traceback (most recent call last):
  File "/home/pi/work/./digital_input_interrupt.py", line 122, in <module>
    main()
  File "/home/pi/work/./digital_input_interrupt.py", line 106, in main
    interrupt_callback_enable(callback, int_count)
  File "/usr/local/lib/python3.9/dist-packages/daqhats/hats.py", line 320, in interrupt_callback_enable
    raise Exception("Could not enable callback function.")
Exception: Could not enable callback function.
 

[DAQman]

Hello,

I've duplicated the error you reported, and it appears that the C and the Python digital input interrupt examples are not working. Unfortunately, at this time, I do not have a fix. I will update this post when I have more information.

Best regards,

John

[Zhijang]

Hi John,

I got the issue fixed by update the daqhats version to the latest one (1.4.0.6) from 1.4.0.3

 

Cherrs,

Zhijiang

[DAQman]

I should have checked the version history file. If I did, I would have seen the issue was fixed in 1.4.0.5.

Thanks for posting the solution.

John