126 lines
3.0 KiB
C
126 lines
3.0 KiB
C
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/**
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******************************************************************************
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* @file stm32f4xx_crc.c
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* @author MCD Application Team
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* @version V1.8.1
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* @date 27-January-2022
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* @brief This file provides all the CRC firmware functions.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2016 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "stm32f4xx_crc.h"
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/** @addtogroup STM32F4xx_StdPeriph_Driver
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* @{
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*/
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/** @defgroup CRC
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* @brief CRC driver modules
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* @{
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*/
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/* Private functions ---------------------------------------------------------*/
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/** @defgroup CRC_Private_Functions
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* @{
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*/
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/**
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* @brief Resets the CRC Data register (DR).
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* @param None
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* @retval None
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*/
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void CRC_ResetDR(void)
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{
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/* Reset CRC generator */
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CRC->CR = CRC_CR_RESET;
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}
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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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* @param Data: data word(32-bit) to compute its CRC
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* @retval 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->DR = Data;
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return (CRC->DR);
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}
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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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* @param pBuffer: pointer to the buffer containing the data to be computed
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* @param BufferLength: length of the buffer to be computed
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* @retval 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->DR = pBuffer[index];
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}
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return (CRC->DR);
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}
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/**
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* @brief Returns the current CRC value.
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* @param None
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* @retval 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->DR);
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}
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/**
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* @brief Stores a 8-bit data in the Independent Data(ID) register.
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* @param IDValue: 8-bit value to be stored in the ID register
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* @retval None
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*/
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void CRC_SetIDRegister(uint8_t IDValue)
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{
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CRC->IDR = IDValue;
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}
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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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* @param None
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* @retval 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->IDR);
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}
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/**
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* @}
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*/
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/**
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* @}
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*/
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/**
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* @}
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*/
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