diff options
author | Nick Brassel <nick@tzarc.org> | 2021-08-29 08:20:25 +1000 |
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committer | Nick Brassel <nick@tzarc.org> | 2021-08-29 08:20:25 +1000 |
commit | f061ca497464fe85284906fb163a33eaee7a91ef (patch) | |
tree | 33ef1bfb529aed382e8526c607c4e18717f92571 /quantum/crc.h | |
parent | ff65185dec6f97be1eb49f17cea526a0d0bbf3d6 (diff) | |
parent | 4bad375d7c09d949a9dcdd4feba147c9c7a67ec6 (diff) |
Breaking changes develop merge to master, 2021Q3 edition. (#14196)
Diffstat (limited to 'quantum/crc.h')
-rw-r--r-- | quantum/crc.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/quantum/crc.h b/quantum/crc.h new file mode 100644 index 0000000000..c17f5888e2 --- /dev/null +++ b/quantum/crc.h @@ -0,0 +1,44 @@ +/* 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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