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can not stopp script, when piface interrupt is enabled

Former Member

Hi there,

 

for my raspberrypi /piface combo I have an interrupt handler defined.

This is the code used:

class Demonstrator(object):

    ...

    pdf = None

    listener = None

   

    def __init__(self, setting):

        ...

        pifacedigitalio.init()

        self.pfd = pifacedigitalio.PiFaceDigital()

        self.activate_eventhandler()

               

    def activate_eventhandler(self, port=0):

            self.listener = pifacedigitalio.InputEventListener(self.pfd)

            self.listener.register(port, pifacedigitalio.IODIR_BOTH, self.setInput_eventhandler)

            self.listener.activate()

 

Now as soon as activate_eventhandler is called, I can not stop the script from the console anymor.

I have to kill it by using

kill -9 PID

 

is there a way to handle this more gracefully?

 

thanks

robert

Parents
  • 0

    You need to use a Python feature to disable your interrupt handlers. Add the following code to your program and the problem will be solved. The atexit.register line of code should be located immediately after activation the listeners. If you interrupt your program with a Ctrl-c, Python will let you know that a keyboard interrupt was received. Do a second Ctrl-c and the program will terminate.

     

    Phil

     

     

    import atexit

     

     

    def killListeners()

      listener1.deactivate()

      listener2.deactivate()

      return

     

    atexit.register(killListeners)

Reply
  • 0

    You need to use a Python feature to disable your interrupt handlers. Add the following code to your program and the problem will be solved. The atexit.register line of code should be located immediately after activation the listeners. If you interrupt your program with a Ctrl-c, Python will let you know that a keyboard interrupt was received. Do a second Ctrl-c and the program will terminate.

     

    Phil

     

     

    import atexit

     

     

    def killListeners()

      listener1.deactivate()

      listener2.deactivate()

      return

     

    atexit.register(killListeners)

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