mirror of
https://github.com/qmk/qmk_firmware.git
synced 2024-11-29 22:45:51 +00:00
44 lines
1.3 KiB
C
44 lines
1.3 KiB
C
|
/* Copyright 2021 QMK
|
||
|
|
*
|
||
|
|
* 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, see <http://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#pragma once
|
||
|
|
|
||
|
|
#include "quantum.h"
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The type of the CRC values.
|
||
|
|
*
|
||
|
|
* This type must be big enough to contain at least 8 bits.
|
||
|
|
*/
|
||
|
|
#if defined(CRC8_OPTIMIZE_SPEED)
|
||
|
|
typedef uint_fast8_t crc_t;
|
||
|
|
#else
|
||
|
|
typedef uint_least8_t crc_t;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Initialize crc subsystem.
|
||
|
|
*/
|
||
|
|
__attribute__((weak)) void crc_init(void);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Generate CRC8 value from given data.
|
||
|
|
*
|
||
|
|
* \param[in] data Pointer to a buffer of \a data_len bytes.
|
||
|
|
* \param[in] data_len Number of bytes in the \a data buffer.
|
||
|
|
* \return The calculated crc value.
|
||
|
|
*/
|
||
|
|
__attribute__((weak)) uint8_t crc8(const void *data, size_t data_len);
|