Issues (158)

doorpi/keyboard/from_piface.py (2 issues)

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