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bitbang module

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This commit is contained in:
Maxim Devaev
2024-02-09 22:49:17 +02:00
parent 2149f497d4
commit 0b382c3d59
2 changed files with 38 additions and 16 deletions
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34
kvmd/bitbang.py Normal file
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# ========================================================================== #
# #
# KVMD - The main PiKVM daemon. #
# #
# Copyright (C) 2018-2023 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/>. #
# #
# ========================================================================== #
# =====
def make_crc16(data: bytes) -> int:
crc = 0xFFFF
for byte in data:
crc = crc ^ byte
for _ in range(8):
if crc & 0x0001 == 0:
crc = crc >> 1
else:
crc = crc >> 1
crc = crc ^ 0xA001
return crc