simmel-bootloader/lib/sdk/components/libraries/crc16/crc16.h
hathach df71d3444d follow #1
seperate files from latest SDK (currently 14.2.0) from good old non-
secure bootloader sdk 11
2018-04-05 00:35:08 +07:00

81 lines
3.1 KiB
C

/**
* Copyright (c) 2013 - 2017, Nordic Semiconductor ASA
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form, except as embedded into a Nordic
* Semiconductor ASA integrated circuit in a product or a software update for
* such product, must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* 4. This software, with or without modification, must only be used with a
* Nordic Semiconductor ASA integrated circuit.
*
* 5. Any software provided in binary form under this license must not be reverse
* engineered, decompiled, modified and/or disassembled.
*
* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/** @file
*
* @defgroup crc16 CRC16 compute
* @{
* @ingroup hci_transport
*
* @brief This module implements CRC-16-CCITT (polynomial 0x1021) with 0xFFFF initial value.
* The data can be passed in multiple blocks.
*/
#ifndef CRC16_H__
#define CRC16_H__
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
/**@brief Function for calculating CRC-16 in blocks.
*
* Feed each consecutive data block into this function, along with the current value of p_crc as
* returned by the previous call of this function. The first call of this function should pass NULL
* as the initial value of the crc in p_crc.
*
* @param[in] p_data The input data block for computation.
* @param[in] size The size of the input data block in bytes.
* @param[in] p_crc The previous calculated CRC-16 value or NULL if first call.
*
* @return The updated CRC-16 value, based on the input supplied.
*/
uint16_t crc16_compute(uint8_t const * p_data, uint32_t size, uint16_t const * p_crc);
#ifdef __cplusplus
}
#endif
#endif // CRC16_H__
/** @} */