# # Simple PWM controller # Remote control tool # # Copyright (c) 2018-2021 Michael Buesch # # 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 2 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, write to the Free Software Foundation, Inc., # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. # __all__ = [ "crc8", ] from libsimplepwm.util import * def crc8(data): P = 0x07 crc = 0 for d in data: tmp = crc ^ d for i in range(8): if tmp & 0x80: tmp = ((tmp << 1) & 0xFF) ^ P else: tmp = (tmp << 1) & 0xFF crc = tmp return crc ^ 0xFF # vim: ts=4 sw=4 expandtab