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# SPDX-License-Identifier: LGPL-3.0-or-later
# Copyright (C) 2020 Daniel Thompson
"""Inverting pin wrapper
~~~~~~~~~~~~~~~~~~~~~~~~
"""
class Signal(object):
"""Simplified Signal class
.. note::
The normal C implementation of the Signal class used by MicroPython
doesn't work on the nRF family. This class provides a temporary
workaround until that can be addressed.
.. automethod:: __init__
"""
def __init__(self, pin, invert=False):
"""Create a Signal object by wrapping a pin."""
self.pin = pin
self.invert = invert
def __call__(self, v=None):
"""Shortcut for :py:meth:`.value`"""
return self.value(v)
def value(self, v=None):
"""Get or set the state of the signal.
:param v: Value to set, defaults to None (which means get the signal
state instead.
:returns: The state of the signal if v is None, otherwise None.
"""
if v == None:
return self.invert ^ self.pin.value()
self.pin.value(self.invert ^ bool(v))
def on(self):
"""Activate the signal."""
self.value(1)
def off(self):
"""Deactivate the signal."""
self.value(0)
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