2 ******************************************************************************
3 * @file stm32f4xx_crc.c
4 * @author MCD Application Team
7 * @brief This file provides all the CRC firmware functions.
8 ******************************************************************************
11 * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
12 * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
13 * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
14 * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
15 * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
16 * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
18 * <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2>
19 ******************************************************************************
22 /* Includes ------------------------------------------------------------------*/
23 #include "stm32f4xx_crc.h"
25 /** @addtogroup STM32F4xx_StdPeriph_Driver
30 * @brief CRC driver modules
34 /* Private typedef -----------------------------------------------------------*/
35 /* Private define ------------------------------------------------------------*/
36 /* Private macro -------------------------------------------------------------*/
37 /* Private variables ---------------------------------------------------------*/
38 /* Private function prototypes -----------------------------------------------*/
39 /* Private functions ---------------------------------------------------------*/
41 /** @defgroup CRC_Private_Functions
46 * @brief Resets the CRC Data register (DR).
50 void CRC_ResetDR(void)
52 /* Reset CRC generator */
53 CRC->CR = CRC_CR_RESET;
57 * @brief Computes the 32-bit CRC of a given data word(32-bit).
58 * @param Data: data word(32-bit) to compute its CRC
61 uint32_t CRC_CalcCRC(uint32_t Data)
69 * @brief Computes the 32-bit CRC of a given buffer of data word(32-bit).
70 * @param pBuffer: pointer to the buffer containing the data to be computed
71 * @param BufferLength: length of the buffer to be computed
74 uint32_t CRC_CalcBlockCRC(uint32_t pBuffer[], uint32_t BufferLength)
78 for(index = 0; index < BufferLength; index++)
80 CRC->DR = pBuffer[index];
86 * @brief Returns the current CRC value.
90 uint32_t CRC_GetCRC(void)
96 * @brief Stores a 8-bit data in the Independent Data(ID) register.
97 * @param IDValue: 8-bit value to be stored in the ID register
100 void CRC_SetIDRegister(uint8_t IDValue)
106 * @brief Returns the 8-bit data stored in the Independent Data(ID) register
108 * @retval 8-bit value of the ID register
110 uint8_t CRC_GetIDRegister(void)
127 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/