114 lines
4.8 KiB
C
114 lines
4.8 KiB
C
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/*******************************************************************************
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* Copyright (C) 2020, Huada Semiconductor Co., Ltd. All rights reserved.
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*
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* This software component is licensed by HDSC under BSD 3-Clause license
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* (the "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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* opensource.org/licenses/BSD-3-Clause
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*/
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/******************************************************************************/
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/** \file hc32f460_crc.h
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**
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** A detailed description is available at
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** @link CrcGroup Crc description @endlink
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**
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** - 2019-03-07 CDT First version for Device Driver Library of Crc.
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**
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******************************************************************************/
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#ifndef __HC32F460_CRC_H__
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#define __HC32F460_CRC_H__
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/*******************************************************************************
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* Include files
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******************************************************************************/
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#include "hc32_common.h"
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/* C binding of definitions if building with C++ compiler */
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/**
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*******************************************************************************
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** \defgroup CrcGroup Cyclic Redundancy Check(CRC)
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**
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******************************************************************************/
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//@{
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/*******************************************************************************
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* Global type definitions ('typedef')
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******************************************************************************/
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/* Bits definitions of CRC control register(CRC_CR). */
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/*
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* Definitions of CRC protocol.
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* NOTE: CRC16 polynomial is X16 + X12 + X5 + 1
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* CRC32 polynomial is X32 + X26 + X23 + X22 + X16 + X12 + X11 + X10 + \
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* X8 + X7 + X5 + X4 + X2 + X + 1
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*/
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#define CRC_SEL_16B ((uint32_t)0x0)
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#define CRC_SEL_32B ((uint32_t)(0x1ul << 1u))
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/*
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* Identifies the transpose configuration of the source data.
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* If this function is enabled, the source data's bits in bytes are transposed.
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* e.g. There's a source data 0x1234 which will be calculated checksum and this
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* function is enabled, the final data be calculated is 0x482C.
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* 0x12: bit0->bit7, bit1->bit6, ..., bit7->bit0, the data byte changed to 0x48.
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* 0x48: bit0->bit7, bit1->bit6, ..., bit7->bit0, the data byte changed to 0x2C.
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* The same to 32 bit data while using CRC32.
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*/
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#define CRC_REFIN_DISABLE ((uint32_t)0x0)
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#define CRC_REFIN_ENABLE ((uint32_t)(0x1ul << 2u))
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/*
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* Identifies the transpose configuration of the checksum.
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* If this function is enabled, bits of the checksum will be transposed.
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* e.g. There is a CRC16 checksum is 0x5678 before this function enabled, then
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* this function is enabled, the checksum will be 0x1E6A.
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* 0x5678: bit0->bit15, bit1->bit14, ..., bit15->bit0, the final data is 0x1E6A.
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* The same to CRC32 checksum while using CRC32.
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*/
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#define CRC_REFOUT_DISABLE ((uint32_t)0x0)
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#define CRC_REFOUT_ENABLE ((uint32_t)(0x1ul << 3u))
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/*
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* XORs the CRC checksum with 0xFFFF(CRC16) or 0xFFFFFFFF(CRC32).
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* e.g. There is a CRC16 checksum is 0x5678 before this function enabled.
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* If this function enabled, the checksum will be 0xA987.
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* The same to CRC32 checksum while using CRC32.
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*/
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#define CRC_XOROUT_DISABLE ((uint32_t)0x0)
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#define CRC_XOROUT_ENABLE ((uint32_t)(0x1ul << 4u))
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#define CRC_CONFIG_MASK ((uint32_t)(0x1Eu))
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/*******************************************************************************
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* Global pre-processor symbols/macros ('#define')
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******************************************************************************/
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/*******************************************************************************
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* Global variable definitions ('extern')
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******************************************************************************/
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/*******************************************************************************
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* Global function prototypes (definition in C source)
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******************************************************************************/
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void CRC_Init(uint32_t u32Config);
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uint16_t CRC_Calculate16B(uint16_t u16InitVal, const uint16_t *pu16Data, uint32_t u32Length);
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uint32_t CRC_Calculate32B(uint32_t u32InitVal, const uint32_t *pu32Data, uint32_t u32Length);
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bool CRC_Check16B(uint16_t u16InitVal, uint16_t u16CheckSum, const uint16_t *pu16Data, uint32_t u32Length);
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bool CRC_Check32B(uint32_t u32InitVal, uint32_t u32CheckSum, const uint32_t *pu32Data, uint32_t u32Length);
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//@} // CrcGroup
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#ifdef __cplusplus
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}
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#endif
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#endif /* __HC32F460_CRC_H__ */
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/*******************************************************************************
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* EOF (not truncated)
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******************************************************************************/
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