nochanges
Dependents: BLE_Acceleration_Statejudging
Fork of nRF51822 by
nordic/app_common/crc16.cpp
- Committer:
- MonroeLee
- Date:
- 2016-06-09
- Revision:
- 638:6efcf74f000d
- Parent:
- 65:98215c4f3a25
File content as of revision 638:6efcf74f000d:
/* Copyright (c) 2013 Nordic Semiconductor. All Rights Reserved. * * The information contained herein is property of Nordic Semiconductor ASA. * Terms and conditions of usage are described in detail in NORDIC * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT. * * Licensees are granted free, non-transferable use of the information. NO * WARRANTY of ANY KIND is provided. This heading must NOT be removed from * the file. * */ #include "crc16.h" #include <stdio.h> uint16_t crc16_compute(const uint8_t * p_data, uint32_t size, const uint16_t * p_crc) { uint32_t i; uint16_t crc = (p_crc == NULL) ? 0xffff : *p_crc; for (i = 0; i < size; i++) { crc = (unsigned char)(crc >> 8) | (crc << 8); crc ^= p_data[i]; crc ^= (unsigned char)(crc & 0xff) >> 4; crc ^= (crc << 8) << 4; crc ^= ((crc & 0xff) << 4) << 1; } return crc; }