117 lines
3.1 KiB
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 */
|