doorpi/keyboard/from_gpio.py
#!/usr/bin/env python
# -*- coding: utf-8 -*-
import logging
logger = logging.getLogger(__name__)
logger.debug("%s loaded", __name__)
import RPi.GPIO as RPiGPIO # basic for GPIO control
from doorpi.keyboard.AbstractBaseClass import KeyboardAbstractBaseClass, HIGH_LEVEL, LOW_LEVEL
import doorpi
def get(**kwargs): return GPIO(**kwargs)
class GPIO(KeyboardAbstractBaseClass):
name = 'GPIO Keyboard'
def __init__(self, input_pins, output_pins, conf_pre, conf_post, keyboard_name,
bouncetime=200, polarity=0, pressed_on_key_down=True, *args, **kwargs):
logger.debug("__init__(input_pins = %s, output_pins = %s, bouncetime = %s, polarity = %s)",
input_pins, output_pins, bouncetime, 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
RPiGPIO.setwarnings(False)
section_name = conf_pre+'keyboard'+conf_post
if doorpi.DoorPi().config.get(section_name, 'mode', "BOARD").upper() == "BOARD":
RPiGPIO.setmode(RPiGPIO.BOARD)
else:
RPiGPIO.setmode(RPiGPIO.BCM)
# issue 134
pull_up_down = doorpi.DoorPi().config.get(section_name, 'pull_up_down', "PUD_OFF").upper()
if pull_up_down == "PUD_DOWN":
pull_up_down = RPiGPIO.PUD_DOWN
elif pull_up_down == "PUD_UP":
pull_up_down = RPiGPIO.PUD_UP
else:
pull_up_down = RPiGPIO.PUD_OFF
# issue #133
try:
RPiGPIO.setup(self._InputPins, RPiGPIO.IN, pull_up_down=pull_up_down)
except TypeError:
logger.warning('you use an old version of GPIO library - fallback to single-register of input pins')
for input_pin in self._InputPins:
RPiGPIO.setup(input_pin, RPiGPIO.IN, pull_up_down=pull_up_down)
for input_pin in self._InputPins:
RPiGPIO.add_event_detect(
input_pin,
RPiGPIO.BOTH,
callback=self.event_detect,
bouncetime=int(bouncetime)
)
self._register_EVENTS_for_pin(input_pin, __name__)
# issue #133
try:
RPiGPIO.setup(self._OutputPins, RPiGPIO.OUT)
except TypeError:
logger.warning('you use an old version of GPIO library - fallback to single-register of input pins')
for output_pin in self._OutputPins:
RPiGPIO.setup(output_pin, RPiGPIO.OUT)
# 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 all output-pins
for output_pin in self._OutputPins:
self.set_output(output_pin, 0, False)
RPiGPIO.cleanup()
doorpi.DoorPi().event_handler.unregister_source(__name__, True)
self.__destroyed = True
def event_detect(self, pin):
if self.status_input(pin):
self._fire_OnKeyDown(pin, __name__)
if self._pressed_on_key_down: # issue 134
self._fire_OnKeyPressed(pin, __name__)
else:
self._fire_OnKeyUp(pin, __name__)
if not self._pressed_on_key_down: # issue 134
self._fire_OnKeyPressed(pin, __name__)
def status_input(self, pin):
if self._polarity is 0:
return str(RPiGPIO.input(int(pin))).lower() in HIGH_LEVEL
else:
return str(RPiGPIO.input(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 pin not in self._OutputPins:
return False
if log_output:
logger.debug("out(pin = %s, value = %s, log_output = %s)", pin, value, log_output)
RPiGPIO.output(pin, value)
self._OutputStatus[pin] = value
return True