"""Classes for the LED support."""
from abc import abstractmethod
from typing import Type
from j5.components.component import Component, Interface
[docs]class LEDInterface(Interface):
"""An interface containing the methods required to control an LED."""
[docs] @abstractmethod
def get_led_state(self, identifier: int) -> bool:
"""Get the state of an LED."""
raise NotImplementedError # pragma: no cover
[docs] @abstractmethod
def set_led_state(self, identifier: int, state: bool) -> None:
"""Set the state of an LED."""
raise NotImplementedError # pragma: no cover
[docs]class LED(Component):
"""A standard Light Emitting Diode."""
def __init__(self, identifier: int, backend: LEDInterface) -> None:
self._backend = backend
self._identifier = identifier
[docs] @staticmethod
def interface_class() -> Type[LEDInterface]:
"""Get the interface class that is required to use this component."""
return LEDInterface
@property
def identifier(self) -> int:
"""An integer to identify the component on a board."""
return self._identifier
@property
def state(self) -> bool:
"""Get the current state of the LED."""
return self._backend.get_led_state(self._identifier)
@state.setter
def state(self, new_state: bool) -> None:
"""Set the state of the LED."""
self._backend.set_led_state(self._identifier, new_state)