7i76e expansion ports don't work properly

I set some gpio pins as inputs and outputs, the inputs work but not for outputs. Firstly, I wrote down the respectively statements in the custom hal file. A momentary switch is connected to the input, but the voltage measured on the output is always at high level (i.e is always at 5v or always at 2.7V when having resistor loaded to it). However, In the hal meter observations, they both show true and false changing words when the switch is pressed.

Thanks,

Did you set the "is_output" attribute for the GPIO pins used as outputs?

Properly no, so where and how to set it?

> it works now, thanks,

1) is it the same effect by configure the pncconf by clicking the corresponding IO checkbox to output instead of the default input?

2) I did above 2) before, but I think I mess them up without using the new generated[machine_name].hal, file as I kept on using the old one to replace new one, it is because the new one failed to start up. For the old one, I manually wrote something there so it is ok in starting up....somehow..so long time...that I forgot what stuffs i wrote there ...added axis...screen..

anyway, thanks,