PiFace input delays

Question

I have a PiFace on a RaspberryPi, and it works great, but there is a several second delay between when the input switches to when the script responds. Can someone tell me where to find/change this delay time? Thanks, Jim

Jan Cumps · Answer

How are you talking to the PiFACE? I'm using C++ and the effect is almost instant.

Here is my code: SCPI on a Linux Board - Part 2b: PiFace Digital C++ programming

Edit: here's an example that supports interrupts to react real time on input changes: https://github.com/piface/libpifacedigital/blob/master/example.c