mirror of
https://github.com/mofeng-git/One-KVM.git
synced 2025-12-12 01:00:29 +08:00
102 lines
3.4 KiB
Python
102 lines
3.4 KiB
Python
# ========================================================================== #
|
|
# #
|
|
# KVMD - The main Pi-KVM daemon. #
|
|
# #
|
|
# Copyright (C) 2018 Maxim Devaev <mdevaev@gmail.com> #
|
|
# #
|
|
# 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 asyncio
|
|
import contextlib
|
|
|
|
from typing import Tuple
|
|
from typing import Set
|
|
from typing import Generator
|
|
from typing import Optional
|
|
|
|
from RPi import GPIO
|
|
|
|
from .logging import get_logger
|
|
|
|
from . import aiotools
|
|
|
|
|
|
# =====
|
|
@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: Optional[bool]) -> 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, state: bool) -> None:
|
|
assert pin >= 0, pin
|
|
GPIO.output(pin, state)
|
|
|
|
|
|
class BatchReader:
|
|
def __init__(
|
|
self,
|
|
pins: Set[int],
|
|
interval: float,
|
|
notifier: aiotools.AioNotifier,
|
|
) -> None:
|
|
|
|
self.__pins = sorted(pins)
|
|
self.__interval = interval
|
|
self.__notifier = notifier
|
|
|
|
self.__state = {pin: read(pin) for pin in self.__pins}
|
|
self.__flags: Tuple[Optional[bool], ...] = (None,) * len(self.__pins)
|
|
|
|
def get(self, pin: int) -> bool:
|
|
return self.__state[pin]
|
|
|
|
async def poll(self) -> None:
|
|
if not self.__pins:
|
|
await aiotools.wait_infinite()
|
|
else:
|
|
while True:
|
|
flags = tuple(map(read, self.__pins))
|
|
if flags != self.__flags:
|
|
self.__flags = flags
|
|
self.__state = dict(zip(self.__pins, flags))
|
|
await self.__notifier.notify()
|
|
await asyncio.sleep(self.__interval)
|