b1497f2187
1. avoid including rom headers directly in examples 2. add common API interface for CRC calculation in esp_common component
113 lines
3.4 KiB
C
113 lines
3.4 KiB
C
// Copyright 2015-2019 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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#pragma once
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdint.h>
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#include "sdkconfig.h"
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#if defined(CONFIG_IDF_TARGET_ESP32)
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#include "esp32/rom/crc.h"
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#endif
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/******************* Polynomials Used in the CRC APIs ****************************
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* CRC-8 x8+x2+x1+1 0x07
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* CRC16-CCITT x16+x12+x5+1 0x1021
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* CRC32 x32+x26+x23+x22+x16+x12+x11+x10+x8+x7+x5+x4+x2+x1+1 0x04c11db7
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********************************************************************************/
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/**
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* @brief CRC32 value in little endian.
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*
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* @param crc: Initial CRC value (result of last calculation or 0 for the first time)
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* @param buf: Data buffer that used to calculate the CRC value
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* @param len: Length of the data buffer
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* @return CRC32 value
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*/
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static inline uint32_t esp_crc32_le(uint32_t crc, uint8_t const *buf, uint32_t len)
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{
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return crc32_le(crc, buf, len);
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}
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/**
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* @brief CRC32 value in big endian.
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*
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* @param crc: Initial CRC value (result of last calculation or 0 for the first time)
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* @param buf: Data buffer that used to calculate the CRC value
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* @param len: Length of the data buffer
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* @return CRC32 value
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*/
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static inline uint32_t esp_crc32_be(uint32_t crc, uint8_t const *buf, uint32_t len)
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{
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return crc32_be(crc, buf, len);
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}
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/**
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* @brief CRC16 value in little endian.
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*
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* @param crc: Initial CRC value (result of last calculation or 0 for the first time)
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* @param buf: Data buffer that used to calculate the CRC value
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* @param len: Length of the data buffer
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* @return CRC16 value
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*/
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static inline uint16_t esp_crc16_le(uint16_t crc, uint8_t const *buf, uint32_t len)
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{
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return crc16_le(crc, buf, len);
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}
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/**
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* @brief CRC16 value in big endian.
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*
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* @param crc: Initial CRC value (result of last calculation or 0 for the first time)
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* @param buf: Data buffer that used to calculate the CRC value
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* @param len: Length of the data buffer
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* @return CRC16 value
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*/
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static inline uint16_t esp_crc16_be(uint16_t crc, uint8_t const *buf, uint32_t len)
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{
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return crc16_be(crc, buf, len);
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}
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/**
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* @brief CRC8 value in little endian.
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*
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* @param crc: Initial CRC value (result of last calculation or 0 for the first time)
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* @param buf: Data buffer that used to calculate the CRC value
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* @param len: Length of the data buffer
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* @return CRC8 value
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*/
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static inline uint8_t esp_crc8_le(uint8_t crc, uint8_t const *buf, uint32_t len)
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{
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return crc8_le(crc, buf, len);
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}
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/**
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* @brief CRC8 value in big endian.
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*
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* @param crc: Initial CRC value (result of last calculation or 0 for the first time)
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* @param buf: Data buffer that used to calculate the CRC value
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* @param len: Length of the data buffer
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* @return CRC8 value
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*/
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static inline uint8_t esp_crc8_be(uint8_t crc, uint8_t const *buf, uint32_t len)
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{
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return crc8_be(crc, buf, len);
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}
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#ifdef __cplusplus
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}
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#endif
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