ams-master-23/Drivers/STM32F3xx_HAL_Driver/Src/stm32f3xx_ll_crc.c

117 lines
3.1 KiB
C

/**
******************************************************************************
* @file stm32f3xx_ll_crc.c
* @author MCD Application Team
* @brief CRC LL module driver.
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
#if defined(USE_FULL_LL_DRIVER)
/* Includes ------------------------------------------------------------------*/
#include "stm32f3xx_ll_crc.h"
#include "stm32f3xx_ll_bus.h"
#ifdef USE_FULL_ASSERT
#include "stm32_assert.h"
#else
#define assert_param(expr) ((void)0U)
#endif /* USE_FULL_ASSERT */
/** @addtogroup STM32F3xx_LL_Driver
* @{
*/
#if defined (CRC)
/** @addtogroup CRC_LL
* @{
*/
/* Private types -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private constants ---------------------------------------------------------*/
/* Private macros ------------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Exported functions --------------------------------------------------------*/
/** @addtogroup CRC_LL_Exported_Functions
* @{
*/
/** @addtogroup CRC_LL_EF_Init
* @{
*/
/**
* @brief De-initialize CRC registers (Registers restored to their default values).
* @param CRCx CRC Instance
* @retval An ErrorStatus enumeration value:
* - SUCCESS: CRC registers are de-initialized
* - ERROR: CRC registers are not de-initialized
*/
ErrorStatus LL_CRC_DeInit(CRC_TypeDef *CRCx)
{
ErrorStatus status = SUCCESS;
/* Check the parameters */
assert_param(IS_CRC_ALL_INSTANCE(CRCx));
if (CRCx == CRC)
{
/* Set programmable polynomial size in CR register to reset value (32 bits)*/
LL_CRC_SetPolynomialSize(CRCx, LL_CRC_POLYLENGTH_32B);
/* Set programmable polynomial in POL register to reset value */
LL_CRC_SetPolynomialCoef(CRCx, LL_CRC_DEFAULT_CRC32_POLY);
/* Set INIT register to reset value */
LL_CRC_SetInitialData(CRCx, LL_CRC_DEFAULT_CRC_INITVALUE);
/* Set Reversibility options on I/O data values in CR register to reset value */
LL_CRC_SetInputDataReverseMode(CRCx, LL_CRC_INDATA_REVERSE_NONE);
LL_CRC_SetOutputDataReverseMode(CRCx, LL_CRC_OUTDATA_REVERSE_NONE);
/* Reset the CRC calculation unit */
LL_CRC_ResetCRCCalculationUnit(CRCx);
/* Reset IDR register */
LL_CRC_Write_IDR(CRCx, 0x00U);
}
else
{
status = ERROR;
}
return (status);
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
#endif /* defined (CRC) */
/**
* @}
*/
#endif /* USE_FULL_LL_DRIVER */