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https://github.com/zephyrproject-rtos/zephyr
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9a5a3e06f0
This patch adds crc8-ccitt calculation routine. CRC8 CCITT is required for Flash Circular Buffer module (originally mynewt module). Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>
40 lines
752 B
C
40 lines
752 B
C
/*
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* Copyright (c) 2017 Nordic Semiconductor ASA
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* Copyright (c) 2015 Runtime Inc
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef __CRC8_H_
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#define __CRC8_H_
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#include <zephyr/types.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Initial value expected to be used at the beginning of the crc8_ccitt
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* computation.
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*/
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#define CRC8_CCITT_INITIAL_VALUE 0xFF
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/**
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* @brief Compute CCITT variant of CRC 8
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*
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* Normal CCITT variant of CRC 8 is using 0x07.
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*
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* @param initial_value Initial value for the CRC computation
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* @param buf Input bytes for the computation
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* @param len Length of the input in bytes
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*
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* @return The computed CRC8 value
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*/
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u8_t crc8_ccitt(u8_t initial_value, void *buf, int len);
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#ifdef __cplusplus
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}
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#endif
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#endif
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