Listener/interrupt Not working on Version 1 Piface

[monroel]

Hello,

I am having trouble getting the simple listener examples to work. I am using latest version of Raspbian on an original Raspberry Pi board with the original (version 1?) of the piface, with Python 3.

The piface emulator works just fine on inputs and outputs, and simple input and output examples work fine as well, so I know that the code is communicating with the piface board:

import pifacedigitalio
pfd = pifacedigitalio.PiFaceDigital() # creates a PiFace Digtal object
pfd.leds[1].turn_on() # turn on/set high the second LED
print(pfd.input_pins[0].value)
0

The last statement properly prints a 1 when run while the input 0 switch is pressed.

However, when I try the following listener example, nothing works when input 0 switch is pressed:

import pifacedigitalio

def toggle_led0(event):
... event.chip.leds[0].toggle()
...
pifacedigital = pifacedigitalio.PiFaceDigital()
listener = pifacedigitalio.InputEventListener(chip=pifacedigital)
listener.register(0, pifacedigitalio.IODIR_FALLING_EDGE, toggle_led0)
listener.activate()

Have googled this and been unable to come up with anything. Do I need to explicitly enable interrupts or some other feature? Would really appreciate some help with this. Thanks!

[tompreston]

Hi, your code looks correct. Are you running the most up-to-date software on your Raspberry Pi? There was a change to the GPIO pins through which we detect interrupts. Try running:

sudo apt-get update && sudo apt-get upgrade

[mschluepmann]

Same here - everything up to date

[zeppe]

I have the same problem. My program was running fine. Then I did a apt-get update; apt-get upgrade (which I did not do since 2014) and interrupts stopped working.

[Brewj]

Hi there, I'm trying to inhibit the button on my Piface while the script is running, I can't seem to make it work any one any ideas?https://github.com/Brewj/Event-Trigger