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/********************************** (C) COPYRIGHT *******************************
* File Name : ch32v10x_crc.c
* Author : WCH
* Version : V1.0.0
* Date : 2020/04/30
* Description : This file provides all the CRC firmware functions.
* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
* SPDX-License-Identifier: Apache-2.0
*******************************************************************************/
#include "ch32v10x_crc.h"
/*********************************************************************
* @fn CRC_ResetDR
*
* @brief Resets the CRC Data register (DR).
*
* @return none
*/
void CRC_ResetDR(void)
{
CRC->CTLR = CRC_CTLR_RESET;
}
/*********************************************************************
* @fn CRC_CalcCRC
*
* @brief Computes the 32-bit CRC of a given data word(32-bit).
*
* @param Data - data word(32-bit) to compute its CRC.
*
* @return 32-bit CRC.
*/
uint32_t CRC_CalcCRC(uint32_t Data)
{
CRC->DATAR = Data;
return (CRC->DATAR);
}
/*********************************************************************
* @fn CRC_CalcBlockCRC
*
* @brief Computes the 32-bit CRC of a given buffer of data word(32-bit).
*
* @param pBuffer - pointer to the buffer containing the data to be computed.
* BufferLength - length of the buffer to be computed.
*
* @return 32-bit CRC.
*/
uint32_t CRC_CalcBlockCRC(uint32_t pBuffer[], uint32_t BufferLength)
{
uint32_t index = 0;
for(index = 0; index < BufferLength; index++)
{
CRC->DATAR = pBuffer[index];
}
return (CRC->DATAR);
}
/*********************************************************************
* @fn CRC_GetCRC
*
* @brief Returns the current CRC value.
*
* @return 32-bit CRC.
*/
uint32_t CRC_GetCRC(void)
{
return (CRC->IDATAR);
}
/*********************************************************************
* @fn CRC_SetIDRegister
*
* @brief Stores a 8-bit data in the Independent Data(ID) register.
*
* @param IDValue - 8-bit value to be stored in the ID register.
*
* @return none
*/
void CRC_SetIDRegister(uint8_t IDValue)
{
CRC->IDATAR = IDValue;
}
/*********************************************************************
* @fn CRC_GetIDRegister
*
* @brief Returns the 8-bit data stored in the Independent Data(ID) register.
*
* @return 8-bit value of the ID register.
*/
uint8_t CRC_GetIDRegister(void)
{
return (CRC->IDATAR);
}
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