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
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
#!/usr/bin/env python3
# ========================================================================== #
# #
# KVMD-OLED - A small OLED daemon for PiKVM. #
# #
# Copyright (C) 2018-2024 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 sys
import os
import signal
import itertools
import logging
import time
import usb.core
from luma.core import cmdline as luma_cmdline
from luma.core.device import device as luma_device
from luma.core.render import canvas as luma_canvas
from PIL import Image
from PIL import ImageFont
from .sensors import Sensors
# =====
_logger = logging.getLogger("oled")
# =====
class Screen:
def __init__(
self,
device: luma_device,
font: ImageFont.FreeTypeFont,
font_spacing: int,
offset: tuple[int, int],
) -> None:
self.__device = device
self.__font = font
self.__font_spacing = font_spacing
self.__offset = offset
def draw_text(self, text: str, offset_x: int=0) -> None:
with luma_canvas(self.__device) as draw:
offset = list(self.__offset)
offset[0] += offset_x
draw.multiline_text(offset, text, font=self.__font, spacing=self.__font_spacing, fill="white")
def draw_image(self, image_path: str) -> None:
with luma_canvas(self.__device) as draw:
draw.bitmap(self.__offset, Image.open(image_path).convert("1"), fill="white")
def _detect_geometry() -> dict:
with open("/proc/device-tree/model") as file:
is_cm4 = ("Compute Module 4" in file.read())
has_usb = bool(list(usb.core.find(find_all=True)))
if is_cm4 and has_usb:
return {"height": 64, "rotate": 2}
return {"height": 32, "rotate": 0}
def _get_data_path(subdir: str, name: str) -> str:
if not name.startswith("@"):
return name # Just a regular system path
name = name[1:]
module_path = sys.modules[__name__].__file__
assert module_path is not None
return os.path.join(os.path.dirname(module_path), subdir, name)
# =====
def main() -> None: # pylint: disable=too-many-locals,too-many-branches,too-many-statements
logging.basicConfig(level=logging.INFO, format="%(message)s")
logging.getLogger("PIL").setLevel(logging.ERROR)
parser = luma_cmdline.create_parser(description="Display FQDN and IP on the OLED")
parser.set_defaults(**_detect_geometry())
parser.add_argument("--font", default="@ProggySquare.ttf", type=(lambda arg: _get_data_path("fonts", arg)), help="Font path")
parser.add_argument("--font-size", default=16, type=int, help="Font size")
parser.add_argument("--font-spacing", default=2, type=int, help="Font line spacing")
parser.add_argument("--offset-x", default=0, type=int, help="Horizontal offset")
parser.add_argument("--offset-y", default=0, type=int, help="Vertical offset")
parser.add_argument("--interval", default=5, type=int, help="Screens interval")
parser.add_argument("--image", default="", type=(lambda arg: _get_data_path("pics", arg)), help="Display some image, wait a single interval and exit")
parser.add_argument("--text", default="", help="Display some text, wait a single interval and exit")
parser.add_argument("--pipe", action="store_true", help="Read and display lines from stdin until EOF, wait a single interval and exit")
parser.add_argument("--clear-on-exit", action="store_true", help="Clear display on exit")
parser.add_argument("--contrast", default=64, type=int, help="Set OLED contrast, values from 0 to 255")
parser.add_argument("--fahrenheit", action="store_true", help="Display temperature in Fahrenheit instead of Celsius")
options = parser.parse_args(sys.argv[1:])
if options.config:
config = luma_cmdline.load_config(options.config)
options = parser.parse_args(config + sys.argv[1:])
device = luma_cmdline.create_device(options)
device.cleanup = (lambda _: None)
screen = Screen(
device=device,
font=ImageFont.truetype(options.font, options.font_size),
font_spacing=options.font_spacing,
offset=(options.offset_x, options.offset_y),
)
if options.display not in luma_cmdline.get_display_types()["emulator"]:
_logger.info("Iface: %s", options.interface)
_logger.info("Display: %s", options.display)
_logger.info("Size: %dx%d", device.width, device.height)
options.contrast = min(max(options.contrast, 0), 255)
_logger.info("Contrast: %d", options.contrast)
device.contrast(options.contrast)
try:
if options.image:
screen.draw_image(options.image)
time.sleep(options.interval)
elif options.text:
screen.draw_text(options.text.replace("\\n", "\n"))
time.sleep(options.interval)
elif options.pipe:
text = ""
for line in sys.stdin:
text += line
if "\0" in text:
screen.draw_text(text.replace("\0", ""))
text = ""
time.sleep(options.interval)
else:
stop_reason: (str | None) = None
def sigusr_handler(signum: int, _) -> None: # type: ignore
nonlocal stop_reason
if signum in (signal.SIGINT, signal.SIGTERM):
stop_reason = ""
elif signum == signal.SIGUSR1:
stop_reason = "Rebooting...\nPlease wait"
elif signum == signal.SIGUSR2:
stop_reason = "Halted"
for signum in [signal.SIGTERM, signal.SIGINT, signal.SIGUSR1, signal.SIGUSR2]:
signal.signal(signum, sigusr_handler)
hb = itertools.cycle(r"/-\|") # Heartbeat
swim = 0
def draw(text: str) -> None:
nonlocal swim
count = 0
while (count < max(options.interval, 1) * 2) and stop_reason is None:
screen.draw_text(
text=text.replace("__hb__", next(hb)),
offset_x=(3 if swim < 0 else 0),
)
count += 1
if swim >= 1200:
swim = -1200
else:
swim += 1
time.sleep(0.5)
sensors = Sensors(options.fahrenheit)
if device.height >= 64:
while stop_reason is None:
text = "{fqdn}\n{ip}\niface: {iface}\ntemp: {temp}\ncpu: {cpu} mem: {mem}\n(__hb__) {uptime}"
draw(sensors.render(text))
else:
summary = True
while stop_reason is None:
if summary:
text = "{fqdn}\n(__hb__) {uptime}\ntemp: {temp}"
else:
text = "{ip}\n(__hb__) iface: {iface}\ncpu: {cpu} mem: {mem}"
draw(sensors.render(text))
summary = (not summary)
if stop_reason is not None:
if len(stop_reason) > 0:
options.clear_on_exit = False
screen.draw_text(stop_reason)
while len(stop_reason) > 0:
time.sleep(0.1)
except (SystemExit, KeyboardInterrupt):
pass
if options.clear_on_exit:
screen.draw_text("")
|
