mirror of
https://github.com/mofeng-git/One-KVM.git
synced 2025-12-12 01:00:29 +08:00
96 lines
3.3 KiB
Python
96 lines
3.3 KiB
Python
# ========================================================================== #
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# #
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# KVMD - The main Pi-KVM daemon. #
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# #
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# Copyright (C) 2018 Maxim Devaev <mdevaev@gmail.com> #
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# #
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# This program is free software: you can redistribute it and/or modify #
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# it under the terms of the GNU General Public License as published by #
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# the Free Software Foundation, either version 3 of the License, or #
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# (at your option) any later version. #
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# #
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# This program is distributed in the hope that it will be useful, #
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# but WITHOUT ANY WARRANTY; without even the implied warranty of #
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
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# GNU General Public License for more details. #
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# #
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# You should have received a copy of the GNU General Public License #
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# along with this program. If not, see <https://www.gnu.org/licenses/>. #
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# #
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# ========================================================================== #
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import asyncio
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import contextlib
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from typing import Tuple
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from typing import List
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from typing import Generator
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from typing import Optional
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from RPi import GPIO
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from .logging import get_logger
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from . import aiotools
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# =====
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@contextlib.contextmanager
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def bcm() -> Generator[None, None, None]:
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logger = get_logger(2)
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GPIO.setmode(GPIO.BCM)
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logger.info("Configured GPIO mode as BCM")
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try:
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yield
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finally:
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GPIO.cleanup()
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logger.info("GPIO cleaned")
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def set_output(pin: int, initial: bool=False) -> int:
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assert pin >= 0, pin
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GPIO.setup(pin, GPIO.OUT, initial=initial)
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return pin
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def set_input(pin: int) -> int:
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assert pin >= 0, pin
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GPIO.setup(pin, GPIO.IN)
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return pin
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def read(pin: int) -> bool:
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assert pin >= 0, pin
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return bool(GPIO.input(pin))
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def write(pin: int, state: bool) -> None:
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assert pin >= 0, pin
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GPIO.output(pin, state)
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class BatchReader:
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def __init__(self, pins: List[int], interval: float, notifier: aiotools.AioNotifier) -> None:
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self.__pins = pins
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self.__flags: Tuple[Optional[bool], ...] = (None,) * len(pins)
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self.__state = dict.fromkeys(pins, False)
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self.__interval = interval
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self.__notifier = notifier
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def get(self, pin: int) -> bool:
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return self.__state[pin]
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async def poll(self) -> None:
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if not self.__pins:
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await aiotools.wait_infinite()
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else:
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while True:
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flags = tuple(map(read, self.__pins))
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if flags != self.__flags:
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self.__flags = flags
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self.__state = dict(zip(self.__pins, flags))
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await self.__notifier.notify()
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await asyncio.sleep(self.__interval)
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