1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
# ========================================================================== #
# #
# KVMD - The main PiKVM daemon. #
# #
# Copyright (C) 2018-2022 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 re
import multiprocessing
import functools
import errno
import time
from typing import Tuple
from typing import Dict
from typing import Callable
from typing import Optional
from typing import Any
import serial
from ...logging import get_logger
from ... import aiotools
from ... import aiomulti
from ... import aioproc
from ...yamlconf import Option
from ...validators.basic import valid_number
from ...validators.basic import valid_float_f01
from ...validators.os import valid_abs_path
from ...validators.hw import valid_tty_speed
from . import GpioDriverOfflineError
from . import BaseUserGpioDriver
# =====
class Plugin(BaseUserGpioDriver): # pylint: disable=too-many-instance-attributes
def __init__(
self,
instance_name: str,
notifier: aiotools.AioNotifier,
device_path: str,
speed: int,
read_timeout: float,
protocol: int,
) -> None:
super().__init__(instance_name, notifier)
self.__device_path = device_path
self.__speed = speed
self.__read_timeout = read_timeout
self.__protocol = protocol
self.__ctl_queue: "multiprocessing.Queue[int]" = multiprocessing.Queue()
self.__channel_queue: "multiprocessing.Queue[Optional[int]]" = multiprocessing.Queue()
self.__channel: Optional[int] = -1
self.__proc: Optional[multiprocessing.Process] = None
self.__stop_event = multiprocessing.Event()
@classmethod
def get_plugin_options(cls) -> Dict:
return {
"device": Option("", type=valid_abs_path, unpack_as="device_path"),
"speed": Option(115200, type=valid_tty_speed),
"read_timeout": Option(2.0, type=valid_float_f01),
"protocol": Option(1, type=functools.partial(valid_number, min=1, max=2)),
}
@classmethod
def get_pin_validator(cls) -> Callable[[Any], Any]:
return functools.partial(valid_number, min=0, max=3, name="Ezcoo channel")
def prepare(self) -> None:
assert self.__proc is None
self.__proc = multiprocessing.Process(target=self.__serial_worker, daemon=True)
self.__proc.start()
async def run(self) -> None:
while True:
(got, channel) = await aiomulti.queue_get_last(self.__channel_queue, 1)
if got and self.__channel != channel:
self.__channel = channel
await self._notifier.notify()
async def cleanup(self) -> None:
if self.__proc is not None:
if self.__proc.is_alive():
get_logger(0).info("Stopping %s daemon ...", self)
self.__stop_event.set()
if self.__proc.is_alive() or self.__proc.exitcode is not None:
self.__proc.join()
async def read(self, pin: str) -> bool:
if not self.__is_online():
raise GpioDriverOfflineError(self)
return (self.__channel == int(pin))
async def write(self, pin: str, state: bool) -> None:
if not self.__is_online():
raise GpioDriverOfflineError(self)
if state:
self.__ctl_queue.put_nowait(int(pin))
# =====
def __is_online(self) -> bool:
return (
self.__proc is not None
and self.__proc.is_alive()
and self.__channel is not None
)
def __serial_worker(self) -> None:
logger = aioproc.settle(str(self), f"gpio-ezcoo-{self._instance_name}")
while not self.__stop_event.is_set():
try:
with self.__get_serial() as tty:
data = b""
self.__channel_queue.put_nowait(-1)
# Switch and then recieve the state.
# FIXME: Get actual state without modifying the current.
self.__send_channel(tty, 0)
while not self.__stop_event.is_set():
(channel, data) = self.__recv_channel(tty, data)
if channel is not None:
self.__channel_queue.put_nowait(channel)
(got, channel) = aiomulti.queue_get_last_sync(self.__ctl_queue, 0.1) # type: ignore
if got:
assert channel is not None
self.__send_channel(tty, channel)
except Exception as err:
self.__channel_queue.put_nowait(None)
if isinstance(err, serial.SerialException) and err.errno == errno.ENOENT: # pylint: disable=no-member
logger.error("Missing %s serial device: %s", self, self.__device_path)
else:
logger.exception("Unexpected %s error", self)
time.sleep(1)
def __get_serial(self) -> serial.Serial:
return serial.Serial(self.__device_path, self.__speed, timeout=self.__read_timeout)
def __recv_channel(self, tty: serial.Serial, data: bytes) -> Tuple[Optional[int], bytes]:
channel: Optional[int] = None
if tty.in_waiting:
data += tty.read_all()
found = re.findall(b"V[0-9a-fA-F]{2}S", data)
if found:
channel = {
b"V0CS": 0,
b"V18S": 1,
b"V5ES": 2,
b"V08S": 3,
}.get(found[-1], -1)
data = data[-8:]
return (channel, data)
def __send_channel(self, tty: serial.Serial, channel: int) -> None:
assert 0 <= channel <= 3
cmd = b"%s OUT1 VS IN%d\n" % (
(b"SET" if self.__protocol == 1 else b"EZS"),
channel + 1,
)
tty.write(cmd * 2) # Twice because of ezcoo bugs
tty.flush()
def __str__(self) -> str:
return f"Ezcoo({self._instance_name})"
__repr__ = __str__
|
