Listener/interrupt Not working on Version 1 Piface #28
Description
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!