59da455fea
keep default crc16 catalogue for CRC-16/XMODEM Mapping crc16 implement to crc16xmodem crc16 -> crc16xmodem crc16part -> crc16xmodempart - CRC-16/ACORN, CRC-16/LTE, CRC-16/V-41-MSB, XMODEM, ZMODEM poly: 0x1021 initial seed: 0x0000, xor output: 0x0000 : width=16 : poly=0x1021 : init=0x0000 : refin=false : refout=false : xorout=0x0000 : check=0x31c3 : residue=0x0000 : name="CRC-16/XMODEM" https://reveng.sourceforge.io/crc-catalogue/16.htm#crc.cat.crc-16-xmodem Signed-off-by: chao an <anchao.archer@bytedance.com>
66 lines
2.3 KiB
C
66 lines
2.3 KiB
C
/****************************************************************************
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* libs/libc/misc/lib_crc16.c
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <sys/types.h>
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#include <stdint.h>
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#include <nuttx/crc16.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: crc16part
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*
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* Description:
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* Continue CRC calculation on a part of the buffer.
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*
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* The default polynomial is 0x1021 (x^16 + x^12 + x^5 + 1)
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* See crc16xmodempart()
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*
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****************************************************************************/
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uint16_t crc16part(FAR const uint8_t *src, size_t len, uint16_t crc16val)
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{
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return crc16xmodempart(src, len, crc16val);
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}
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/****************************************************************************
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* Name: crc16
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*
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* Description:
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* Return a 16-bit CRC of the contents of the 'src' buffer, length 'len'
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*
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* The default polynomial is 0x1021 (x^16 + x^12 + x^5 + 1)
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* See crc16xmodem()
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*
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****************************************************************************/
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uint16_t crc16(FAR const uint8_t *src, size_t len)
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{
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return crc16xmodempart(src, len, 0);
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}
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