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31b0d79b44
This patch adds an AUTOSAR-style CRC library used by E2E functionality. It introduces multiple CRC variants (CRC8, CRC16, CRC32, CRC64) and the corresponding public headers and implementation files. Key changes: - Public headers: `include/nuttx/crc8.h`, `include/nuttx/crc16.h`, `include/nuttx/crc32.h`, `include/nuttx/crc64.h` with new APIs for specific polynomial variants and incremental (part) helpers. - Implementations added under `libs/libc/misc/` for several polynomials: - `lib_crc16h1021.c` (CRC-16 CCITT-FALSE) - `lib_crc16h8005.c` - `lib_crc32h04c11db7.c` - `lib_crc32hf4acfb13.c` - `lib_crc64emac.c` - `lib_crc8h1d.c` - `lib_crc8h2f.c` - Build files updated to include the new sources. This addition provides low-level CRC primitives required by higher-level protocols and test suites. Signed-off-by: yukangzhi <yukangzhi@xiaomi.com>
211 lines
8 KiB
C
211 lines
8 KiB
C
/****************************************************************************
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* libs/libc/misc/lib_crc32h04c11db7.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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/* [AUTOSAR_SWS_Crc_00003] The CRC module shall implement the CRC32 routine
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* based on the IEEE-802.3 CRC32 Ethernet Standard:
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*
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* CRC32 parameters:
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* CRC result width: 32 bits
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* Polynomial: 04C11DB7h
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* Initial value: FFFFFFFFh
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* Input data reflected: Yes
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* Result data reflected: Yes
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* XOR value: FFFFFFFFh
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*
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* [AUTOSAR_SWS_Crc_00055] The Crc_CalculateCRC32 function of the CRC module
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* shall provide the following CRC results:
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*
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* Data bytes (hexadecimal) | CRC
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* 00 00 00 00 | 2144DF1C
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* F2 01 83 | 24AB9D77
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* 0F AA 00 55 | B6C9B287
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* 00 FF 55 11 | 32A06212
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* 33 22 55 AA BB CC DD EE FF | B0AE863D
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* 92 6B 55 | 9CDEA29B
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* FF FF FF FF | FFFFFFFF
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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/crc32.h>
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* CRC32 table generated with:
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*
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* #include <stdint.h>
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*
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* void generate_crc32_table(uint32_t poly, uint32_t *table)
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* {
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* for (int i = 0; i < 256; i++)
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* {
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* uint32_t crc = i;
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* for (uint8_t bit = 0; bit < 8; bit++)
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* {
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* if (crc & 1)
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* {
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* crc = (crc >> 1) ^ poly;
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* }
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* else
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* {
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* crc = crc >> 1;
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* }
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* }
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* table[i] = crc;
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* }
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* }
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*
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* int main()
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* {
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* uint32_t crc32_table[256];
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* const uint32_t poly = 0x04c11db7;
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*
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* generate_crc32_table(poly, crc32_table);
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*
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* printf("CRC32 Static Table (Poly 0x%08X):\n", poly);
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* for (int i = 0; i < 256; i++)
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* {
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* if (i % 4 == 0) printf("\n");
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* printf("0x%08X, ", crc32_table[i]);
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* }
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*
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* return 0;
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* }
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*
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: crc32h04c11db7_part
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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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* using the 0x04c11db7 polynomial.
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*
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****************************************************************************/
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uint32_t crc32h04c11db7_part(FAR const uint8_t *src,
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size_t len, uint32_t crc32val)
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{
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size_t i;
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static const uint32_t g_crc32_tab[256] =
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{
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0x00000000u, 0x77073096u, 0xee0e612cu, 0x990951bau,
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0x076dc419u, 0x706af48fu, 0xe963a535u, 0x9e6495a3u,
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0x0edb8832u, 0x79dcb8a4u, 0xe0d5e91eu, 0x97d2d988u,
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0x09b64c2bu, 0x7eb17cbdu, 0xe7b82d07u, 0x90bf1d91u,
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0x1db71064u, 0x6ab020f2u, 0xf3b97148u, 0x84be41deu,
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0x1adad47du, 0x6ddde4ebu, 0xf4d4b551u, 0x83d385c7u,
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0x136c9856u, 0x646ba8c0u, 0xfd62f97au, 0x8a65c9ecu,
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0x14015c4fu, 0x63066cd9u, 0xfa0f3d63u, 0x8d080df5u,
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0x3b6e20c8u, 0x4c69105eu, 0xd56041e4u, 0xa2677172u,
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0x3c03e4d1u, 0x4b04d447u, 0xd20d85fdu, 0xa50ab56bu,
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0x35b5a8fau, 0x42b2986cu, 0xdbbbc9d6u, 0xacbcf940u,
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0x32d86ce3u, 0x45df5c75u, 0xdcd60dcfu, 0xabd13d59u,
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0x26d930acu, 0x51de003au, 0xc8d75180u, 0xbfd06116u,
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0x21b4f4b5u, 0x56b3c423u, 0xcfba9599u, 0xb8bda50fu,
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0x2802b89eu, 0x5f058808u, 0xc60cd9b2u, 0xb10be924u,
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0x2f6f7c87u, 0x58684c11u, 0xc1611dabu, 0xb6662d3du,
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0x76dc4190u, 0x01db7106u, 0x98d220bcu, 0xefd5102au,
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0x71b18589u, 0x06b6b51fu, 0x9fbfe4a5u, 0xe8b8d433u,
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0x7807c9a2u, 0x0f00f934u, 0x9609a88eu, 0xe10e9818u,
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0x7f6a0dbbu, 0x086d3d2du, 0x91646c97u, 0xe6635c01u,
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0x6b6b51f4u, 0x1c6c6162u, 0x856530d8u, 0xf262004eu,
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0x6c0695edu, 0x1b01a57bu, 0x8208f4c1u, 0xf50fc457u,
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0x65b0d9c6u, 0x12b7e950u, 0x8bbeb8eau, 0xfcb9887cu,
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0x62dd1ddfu, 0x15da2d49u, 0x8cd37cf3u, 0xfbd44c65u,
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0x4db26158u, 0x3ab551ceu, 0xa3bc0074u, 0xd4bb30e2u,
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0x4adfa541u, 0x3dd895d7u, 0xa4d1c46du, 0xd3d6f4fbu,
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0x4369e96au, 0x346ed9fcu, 0xad678846u, 0xda60b8d0u,
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0x44042d73u, 0x33031de5u, 0xaa0a4c5fu, 0xdd0d7cc9u,
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0x5005713cu, 0x270241aau, 0xbe0b1010u, 0xc90c2086u,
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0x5768b525u, 0x206f85b3u, 0xb966d409u, 0xce61e49fu,
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0x5edef90eu, 0x29d9c998u, 0xb0d09822u, 0xc7d7a8b4u,
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0x59b33d17u, 0x2eb40d81u, 0xb7bd5c3bu, 0xc0ba6cadu,
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0xedb88320u, 0x9abfb3b6u, 0x03b6e20cu, 0x74b1d29au,
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0xead54739u, 0x9dd277afu, 0x04db2615u, 0x73dc1683u,
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0xe3630b12u, 0x94643b84u, 0x0d6d6a3eu, 0x7a6a5aa8u,
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0xe40ecf0bu, 0x9309ff9du, 0x0a00ae27u, 0x7d079eb1u,
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0xf00f9344u, 0x8708a3d2u, 0x1e01f268u, 0x6906c2feu,
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0xf762575du, 0x806567cbu, 0x196c3671u, 0x6e6b06e7u,
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0xfed41b76u, 0x89d32be0u, 0x10da7a5au, 0x67dd4accu,
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0xf9b9df6fu, 0x8ebeeff9u, 0x17b7be43u, 0x60b08ed5u,
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0xd6d6a3e8u, 0xa1d1937eu, 0x38d8c2c4u, 0x4fdff252u,
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0xd1bb67f1u, 0xa6bc5767u, 0x3fb506ddu, 0x48b2364bu,
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0xd80d2bdau, 0xaf0a1b4cu, 0x36034af6u, 0x41047a60u,
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0xdf60efc3u, 0xa867df55u, 0x316e8eefu, 0x4669be79u,
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0xcb61b38cu, 0xbc66831au, 0x256fd2a0u, 0x5268e236u,
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0xcc0c7795u, 0xbb0b4703u, 0x220216b9u, 0x5505262fu,
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0xc5ba3bbeu, 0xb2bd0b28u, 0x2bb45a92u, 0x5cb36a04u,
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0xc2d7ffa7u, 0xb5d0cf31u, 0x2cd99e8bu, 0x5bdeae1du,
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0x9b64c2b0u, 0xec63f226u, 0x756aa39cu, 0x026d930au,
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0x9c0906a9u, 0xeb0e363fu, 0x72076785u, 0x05005713u,
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0x95bf4a82u, 0xe2b87a14u, 0x7bb12baeu, 0x0cb61b38u,
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0x92d28e9bu, 0xe5d5be0du, 0x7cdcefb7u, 0x0bdbdf21u,
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0x86d3d2d4u, 0xf1d4e242u, 0x68ddb3f8u, 0x1fda836eu,
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0x81be16cdu, 0xf6b9265bu, 0x6fb077e1u, 0x18b74777u,
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0x88085ae6u, 0xff0f6a70u, 0x66063bcau, 0x11010b5cu,
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0x8f659effu, 0xf862ae69u, 0x616bffd3u, 0x166ccf45u,
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0xa00ae278u, 0xd70dd2eeu, 0x4e048354u, 0x3903b3c2u,
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0xa7672661u, 0xd06016f7u, 0x4969474du, 0x3e6e77dbu,
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0xaed16a4au, 0xd9d65adcu, 0x40df0b66u, 0x37d83bf0u,
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0xa9bcae53u, 0xdebb9ec5u, 0x47b2cf7fu, 0x30b5ffe9u,
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0xbdbdf21cu, 0xcabac28au, 0x53b39330u, 0x24b4a3a6u,
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0xbad03605u, 0xcdd70693u, 0x54de5729u, 0x23d967bfu,
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0xb3667a2eu, 0xc4614ab8u, 0x5d681b02u, 0x2a6f2b94u,
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0xb40bbe37u, 0xc30c8ea1u, 0x5a05df1bu, 0x2d02ef8du
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};
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crc32val ^= 0xffffffffu;
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for (i = 0u; i < len; i++)
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{
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crc32val = g_crc32_tab[(uint8_t)(crc32val & 0xffu) ^ src[i]] ^
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(crc32val >> 8);
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}
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return crc32val ^ 0xffffffffu;
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}
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/****************************************************************************
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* Name: crc32h04c11db7
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*
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* Description:
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* Return a 32-bit CRC of the contents of the 'src' buffer, length 'len'
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* using the 0x04c11db7 polynomial.
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*
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****************************************************************************/
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uint32_t crc32h04c11db7(FAR const uint8_t *src, size_t len)
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{
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return crc32h04c11db7_part(src, len, 0x00000000u);
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}
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