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# ========================================================================== #
# #
# KVMD - The main Pi-KVM daemon. #
# #
# Copyright (C) 2018 Maxim Devaev <[email protected]> #
# #
# This program is free software: you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
# the Free Software Foundation, either version 3 of the License, or #
# (at your option) any later version. #
# #
# This program is distributed in the hope that it will be useful, #
# but WITHOUT ANY WARRANTY; without even the implied warranty of #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
# GNU General Public License for more details. #
# #
# You should have received a copy of the GNU General Public License #
# along with this program. If not, see <https://www.gnu.org/licenses/>. #
# #
# ========================================================================== #
import contextlib
from typing import Generator
from RPi import GPIO
from .logging import get_logger
# =====
@contextlib.contextmanager
def bcm() -> Generator[None, None, None]:
logger = get_logger(2)
GPIO.setmode(GPIO.BCM)
logger.info("Configured GPIO mode as BCM")
try:
yield
finally:
GPIO.cleanup()
logger.info("GPIO cleaned")
def set_output(pin: int, initial: bool=False) -> int:
assert pin >= 0, pin
GPIO.setup(pin, GPIO.OUT, initial=initial)
return pin
def set_input(pin: int) -> int:
assert pin >= 0, pin
GPIO.setup(pin, GPIO.IN)
return pin
def read(pin: int) -> bool:
assert pin >= 0, pin
return bool(GPIO.input(pin))
def write(pin: int, flag: bool) -> None:
assert pin >= 0, pin
GPIO.output(pin, flag)
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