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#!/usr/bin/env python
# -*- coding: utf-8 -*-
import logging
logger = logging.getLogger(__name__)
logger.debug("%s loaded", __name__)
import pifacedigitalio as p # basic for PiFce control
from doorpi.keyboard.AbstractBaseClass import KeyboardAbstractBaseClass, HIGH_LEVEL, LOW_LEVEL
import doorpi
def get(**kwargs): return PiFace(**kwargs)
class PiFace(KeyboardAbstractBaseClass):
def __init__(self, input_pins, output_pins, keyboard_name, bouncetime,
polarity=0, pressed_on_key_down=True, *args, **kwargs):
logger.debug("__init__(input_pins = %s, output_pins = %s, polarity = %s)",
input_pins, output_pins, polarity)
self.keyboard_name = keyboard_name
self._polarity = polarity
self._InputPins = map(int, input_pins)
self._OutputPins = map(int, output_pins)
self._pressed_on_key_down = pressed_on_key_down
p.init()
self.__listener = p.InputEventListener()
for input_pin in self._InputPins:
self.__listener.register(
pin_num=input_pin,
direction=p.IODIR_BOTH,
callback=self.event_detect,
settle_time=bouncetime / 1000 # from milliseconds to seconds
)
self._register_EVENTS_for_pin(input_pin, __name__)
self.__listener.activate()
# use set_output to register status @ dict self.__OutputStatus
for output_pin in self._OutputPins:
self.set_output(output_pin, 0, False)
self.register_destroy_action()
def destroy(self):
if self.is_destroyed:
return
logger.debug("destroy")
# shutdown listener
self.__listener.deactivate()
# shutdown all output-pins
for output_pin in self._OutputPins:
self.set_output(output_pin, 0, False)
p.deinit()
doorpi.DoorPi().event_handler.unregister_source(__name__, True)
self.__destroyed = True
def event_detect(self, event):
if self.status_input(event.pin_num):
self._fire_OnKeyDown(event.pin_num, __name__)
if self._pressed_on_key_down: # issue 134
self._fire_OnKeyPressed(event.pin_num, __name__)
else:
self._fire_OnKeyUp(event.pin_num, __name__)
if not self._pressed_on_key_down: # issue 134
self._fire_OnKeyPressed(event.pin_num, __name__)
def status_input(self, pin):
if self._polarity is 0:
return str(p.digital_read(int(pin))).lower() in HIGH_LEVEL
else:
return str(p.digital_read(int(pin))).lower() in LOW_LEVEL
def set_output(self, pin, value, log_output = True):
parsed_pin = doorpi.DoorPi().parse_string("!"+str(pin)+"!")
if parsed_pin != "!"+str(pin)+"!":
pin = parsed_pin
pin = int(pin)
value = str(value).lower() in HIGH_LEVEL
if self._polarity is 1: value = not value
log_output = str(log_output).lower() in HIGH_LEVEL
if not pin in self._OutputPins: return False
if log_output: logger.debug("out(pin = %s, value = %s, log_output = %s)", pin, value, log_output)
p.digital_write(pin, value)
self._OutputStatus[pin] = value
return True
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