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/* 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);
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