64 lines
1.7 KiB
Python
64 lines
1.7 KiB
Python
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"""
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Support for controlling the PiFace Digital I/O module on a RPi.
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For more details about this component, please refer to the documentation at
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https://home-assistant.io/components/rpi_pfio/
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"""
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import logging
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from homeassistant.const import (
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EVENT_HOMEASSISTANT_START, EVENT_HOMEASSISTANT_STOP)
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REQUIREMENTS = ['pifacecommon==4.1.2', 'pifacedigitalio==3.0.5']
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_LOGGER = logging.getLogger(__name__)
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DOMAIN = 'rpi_pfio'
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DATA_PFIO_LISTENER = 'pfio_listener'
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def setup(hass, config):
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"""Set up the Raspberry PI PFIO component."""
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import pifacedigitalio as PFIO
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pifacedigital = PFIO.PiFaceDigital()
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hass.data[DATA_PFIO_LISTENER] = PFIO.InputEventListener(chip=pifacedigital)
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def cleanup_pfio(event):
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"""Stuff to do before stopping."""
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PFIO.deinit()
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def prepare_pfio(event):
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"""Stuff to do when home assistant starts."""
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hass.bus.listen_once(EVENT_HOMEASSISTANT_STOP, cleanup_pfio)
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hass.bus.listen_once(EVENT_HOMEASSISTANT_START, prepare_pfio)
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PFIO.init()
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return True
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def write_output(port, value):
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"""Write a value to a PFIO."""
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import pifacedigitalio as PFIO
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PFIO.digital_write(port, value)
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def read_input(port):
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"""Read a value from a PFIO."""
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import pifacedigitalio as PFIO
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return PFIO.digital_read(port)
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def edge_detect(hass, port, event_callback, settle):
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"""Add detection for RISING and FALLING events."""
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import pifacedigitalio as PFIO
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hass.data[DATA_PFIO_LISTENER].register(
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port, PFIO.IODIR_BOTH, event_callback, settle_time=settle)
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def activate_listener(hass):
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"""Activate the registered listener events."""
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hass.data[DATA_PFIO_LISTENER].activate()
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