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/*
* CRC-8-CCITT
*
* Copyright (c) 2020 Michael Buesch <m@bues.ch>
*
* 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.
*/
#include "compat.h"
#include "util.h"
#include "crc.h"
#include <util/crc16.h>
uint8_t crc8_update(uint8_t crc, uint8_t data)
{
return _crc8_ccitt_update(crc, data);
}
uint8_t crc8(const void *buf, uint8_t size)
{
const uint8_t *data = buf;
uint8_t crc = 0u;
uint8_t i;
for (i = 0u; i < size; i++, data++)
crc = crc8_update(crc, *data);
crc ^= 0xFFu;
return crc;
}
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