mirror of
https://github.com/mofeng-git/One-KVM.git
synced 2025-12-12 01:00:29 +08:00
134 lines
4.5 KiB
Python
134 lines
4.5 KiB
Python
# ========================================================================== #
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# #
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# KVMD - The main PiKVM daemon. #
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# #
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# Copyright (C) 2018-2024 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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from typing import Callable
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from typing import Any
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import gpiod
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from ... import aiotools
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from ...yamlconf import Option
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from ...validators.os import valid_abs_path
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from ...validators.hw import valid_gpio_pin
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from . import UserGpioModes
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from . import BaseUserGpioDriver
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# =====
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class Plugin(BaseUserGpioDriver):
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def __init__(
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self,
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instance_name: str,
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notifier: aiotools.AioNotifier,
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device_path: str,
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) -> None:
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super().__init__(instance_name, notifier)
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self.__device_path = device_path
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self.__tasks: dict[int, (asyncio.Task | None)] = {}
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self.__line_req: (gpiod.LineRequest | None) = None
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@classmethod
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def get_plugin_options(cls) -> dict:
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return {
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"device": Option("/dev/gpiochip0", type=valid_abs_path, unpack_as="device_path"),
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}
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@classmethod
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def get_modes(cls) -> set[str]:
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return set([UserGpioModes.OUTPUT])
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@classmethod
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def get_pin_validator(cls) -> Callable[[Any], Any]:
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return valid_gpio_pin
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def register_output(self, pin: str, initial: (bool | None)) -> None:
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_ = initial
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self.__tasks[int(pin)] = None
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def prepare(self) -> None:
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self.__line_req = gpiod.request_lines(
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self.__device_path,
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consumer="kvmd::locator",
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config={
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tuple(self.__tasks): gpiod.LineSettings(
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direction=gpiod.line.Direction.OUTPUT,
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output_value=gpiod.line.Value(False),
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),
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},
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)
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async def cleanup(self) -> None:
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tasks = [
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task
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for task in self.__tasks.values()
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if task is not None
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]
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for task in tasks:
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task.cancel()
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await asyncio.gather(*tasks, return_exceptions=True)
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if self.__line_req:
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try:
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self.__line_req.release()
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except Exception:
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pass
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async def read(self, pin: str) -> bool:
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return (self.__tasks[int(pin)] is not None)
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async def write(self, pin: str, state: bool) -> None:
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pin_int = int(pin)
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task = self.__tasks[pin_int]
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if state and task is None:
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self.__tasks[pin_int] = asyncio.create_task(self.__blink(pin_int))
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elif not state and task is not None:
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task.cancel()
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await task
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self.__tasks[pin_int] = None
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async def __blink(self, pin: int) -> None:
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assert pin in self.__tasks
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assert self.__line_req
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try:
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state = True
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while True:
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self.__line_req.set_value(pin, gpiod.line.Value(state))
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state = (not state)
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await asyncio.sleep(0.1)
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except asyncio.CancelledError:
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pass
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finally:
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self.__line_req.set_value(pin, gpiod.line.Value(False))
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def __str__(self) -> str:
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return f"Locator({self._instance_name})"
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__repr__ = __str__
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