stm32f4xx_crc.c
127 lines
| 3.3 KiB
| text/x-c
|
CLexer
jeandet@pc-de-jeandet3.LAB-LPP.LOCAL
|
r18 | /** | ||
****************************************************************************** | ||||
* @file stm32f4xx_crc.c | ||||
* @author MCD Application Team | ||||
* @version V1.0.0RC1 | ||||
* @date 25-August-2011 | ||||
* @brief This file provides all the CRC firmware functions. | ||||
****************************************************************************** | ||||
* @attention | ||||
* | ||||
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS | ||||
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE | ||||
* TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY | ||||
* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING | ||||
* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE | ||||
* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. | ||||
* | ||||
* <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2> | ||||
****************************************************************************** | ||||
*/ | ||||
/* Includes ------------------------------------------------------------------*/ | ||||
#include "stm32f4xx_crc.h" | ||||
/** @addtogroup STM32F4xx_StdPeriph_Driver | ||||
* @{ | ||||
*/ | ||||
/** @defgroup CRC | ||||
* @brief CRC driver modules | ||||
* @{ | ||||
*/ | ||||
/* Private typedef -----------------------------------------------------------*/ | ||||
/* Private define ------------------------------------------------------------*/ | ||||
/* Private macro -------------------------------------------------------------*/ | ||||
/* Private variables ---------------------------------------------------------*/ | ||||
/* Private function prototypes -----------------------------------------------*/ | ||||
/* Private functions ---------------------------------------------------------*/ | ||||
/** @defgroup CRC_Private_Functions | ||||
* @{ | ||||
*/ | ||||
/** | ||||
* @brief Resets the CRC Data register (DR). | ||||
* @param None | ||||
* @retval None | ||||
*/ | ||||
void CRC_ResetDR(void) | ||||
{ | ||||
/* Reset CRC generator */ | ||||
CRC->CR = CRC_CR_RESET; | ||||
} | ||||
/** | ||||
* @brief Computes the 32-bit CRC of a given data word(32-bit). | ||||
* @param Data: data word(32-bit) to compute its CRC | ||||
* @retval 32-bit CRC | ||||
*/ | ||||
uint32_t CRC_CalcCRC(uint32_t Data) | ||||
{ | ||||
CRC->DR = Data; | ||||
return (CRC->DR); | ||||
} | ||||
/** | ||||
* @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 | ||||
* @param BufferLength: length of the buffer to be computed | ||||
* @retval 32-bit CRC | ||||
*/ | ||||
uint32_t CRC_CalcBlockCRC(uint32_t pBuffer[], uint32_t BufferLength) | ||||
{ | ||||
uint32_t index = 0; | ||||
for(index = 0; index < BufferLength; index++) | ||||
{ | ||||
CRC->DR = pBuffer[index]; | ||||
} | ||||
return (CRC->DR); | ||||
} | ||||
/** | ||||
* @brief Returns the current CRC value. | ||||
* @param None | ||||
* @retval 32-bit CRC | ||||
*/ | ||||
uint32_t CRC_GetCRC(void) | ||||
{ | ||||
return (CRC->DR); | ||||
} | ||||
/** | ||||
* @brief Stores a 8-bit data in the Independent Data(ID) register. | ||||
* @param IDValue: 8-bit value to be stored in the ID register | ||||
* @retval None | ||||
*/ | ||||
void CRC_SetIDRegister(uint8_t IDValue) | ||||
{ | ||||
CRC->IDR = IDValue; | ||||
} | ||||
/** | ||||
* @brief Returns the 8-bit data stored in the Independent Data(ID) register | ||||
* @param None | ||||
* @retval 8-bit value of the ID register | ||||
*/ | ||||
uint8_t CRC_GetIDRegister(void) | ||||
{ | ||||
return (CRC->IDR); | ||||
} | ||||
/** | ||||
* @} | ||||
*/ | ||||
/** | ||||
* @} | ||||
*/ | ||||
/** | ||||
* @} | ||||
*/ | ||||
/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/ | ||||