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https://github.com/espressif/ESP8266_RTOS_SDK.git
synced 2025-07-15 08:32:42 +08:00
feat(util): add esp_crc8 for efuse check
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@ -12,8 +12,8 @@
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef ROM_CRC_H
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#define ROM_CRC_H
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#ifndef __CRC_H_
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#define __CRC_H_
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#include <stdint.h>
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@ -115,6 +115,17 @@ uint8_t crc8_le(uint8_t crc, uint8_t const *buf, uint32_t len);
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*/
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uint8_t crc8_be(uint8_t crc, uint8_t const *buf, uint32_t len);
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/**
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* @brief A crc8 algorithm used in efuse check.
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*
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* @param uint8_t const *p : Pointer to original data.
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*
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* @param uint32_t len : Data length in byte.
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*
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* @return uint8_t: Crc value.
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*/
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uint8_t esp_crc8(uint8_t const *p, uint32_t len);
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/**
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* @}
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*/
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@ -1,5 +1,20 @@
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// Copyright 2018 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// 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,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <stdint.h>
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#include <stdbool.h>
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#include "crc.h"
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static const uint32_t crc32_le_table[256] = {
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0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L, 0x706af48fL, 0xe963a535L, 0x9e6495a3L,
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@ -18,7 +33,7 @@ static const uint32_t crc32_le_table[256] = {
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0x4369e96aL, 0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L, 0xaa0a4c5fL, 0xdd0d7cc9L,
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0x5005713cL, 0x270241aaL, 0xbe0b1010L, 0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
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0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L, 0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL,
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0xedb88320L, 0x9abfb3b6L, 0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L, 0x73dc1683L,
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0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L, 0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L,
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0xf00f9344L, 0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL, 0x196c3671L, 0x6e6b06e7L,
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@ -43,9 +58,29 @@ uint32_t crc32_le(uint32_t crc, const uint8_t *buf, uint32_t len)
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crc = ~crc;
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for (i = 0; i < len; i++){
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for (i = 0; i < len; i++) {
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crc = crc32_le_table[(crc ^ buf[i]) & 0xff] ^ (crc >> 8);
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}
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return ~crc;
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}
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}
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uint8_t esp_crc8(uint8_t const *p, uint32_t len)
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{
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uint8_t i;
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uint8_t crc = 0;
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while (len--) {
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crc = crc ^ (*p++);
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for (i = 0; i < 8; i++) {
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if (crc & 0x01) {
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crc = (crc >> 1) ^ 0x8c;
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} else {
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crc = crc >> 1;
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}
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}
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}
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return crc;
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}
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