/* 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);