99 lines
2.6 KiB
C
99 lines
2.6 KiB
C
/********************************** (C) COPYRIGHT *******************************
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* File Name : ch32v30x_crc.c
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* Author : WCH
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* Version : V1.0.0
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* Date : 2021/06/06
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* Description : This file provides all the CRC firmware functions.
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* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
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* SPDX-License-Identifier: Apache-2.0
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*******************************************************************************/
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#include "ch32v30x_crc.h"
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/*********************************************************************
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* @fn CRC_ResetDR
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*
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* @brief Resets the CRC Data register (DR).
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*
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* @return none
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*/
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void CRC_ResetDR(void)
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{
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CRC->CTLR = CRC_CTLR_RESET;
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}
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/*********************************************************************
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* @fn CRC_CalcCRC
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*
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* @brief Computes the 32-bit CRC of a given data word(32-bit).
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*
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* @param Data - data word(32-bit) to compute its CRC.
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*
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* @return 32-bit CRC.
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*/
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uint32_t CRC_CalcCRC(uint32_t Data)
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{
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CRC->DATAR = Data;
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return (CRC->DATAR);
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}
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/*********************************************************************
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* @fn CRC_CalcBlockCRC
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*
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* @brief Computes the 32-bit CRC of a given buffer of data word(32-bit).
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*
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* @param pBuffer - pointer to the buffer containing the data to be computed.
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* BufferLength - length of the buffer to be computed.
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*
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* @return 32-bit CRC.
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*/
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uint32_t CRC_CalcBlockCRC(uint32_t pBuffer[], uint32_t BufferLength)
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{
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uint32_t index = 0;
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for(index = 0; index < BufferLength; index++)
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{
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CRC->DATAR = pBuffer[index];
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}
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return (CRC->DATAR);
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}
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/*********************************************************************
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* @fn CRC_GetCRC
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*
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* @brief Returns the current CRC value.
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*
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* @return 32-bit CRC.
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*/
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uint32_t CRC_GetCRC(void)
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{
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return (CRC->IDATAR);
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}
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/*********************************************************************
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* @fn CRC_SetIDRegister
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*
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* @brief Stores a 8-bit data in the Independent Data(ID) register.
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*
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* @param IDValue - 8-bit value to be stored in the ID register.
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*
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* @return none
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*/
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void CRC_SetIDRegister(uint8_t IDValue)
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{
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CRC->IDATAR = IDValue;
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}
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/*********************************************************************
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* @fn CRC_GetIDRegister
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*
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* @brief Returns the 8-bit data stored in the Independent Data(ID) register.
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*
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* @return 8-bit value of the ID register.
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*/
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uint8_t CRC_GetIDRegister(void)
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{
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return (CRC->IDATAR);
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}
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