CRC Configuration functions

Functions
__STATIC_INLINE void	LL_CRC_ResetCRCCalculationUnit (CRC_TypeDef *CRCx)
	Reset the CRC calculation unit. More...
__STATIC_INLINE void	LL_CRC_SetPolynomialSize (CRC_TypeDef *CRCx, uint32_t PolySize)
	Configure size of the polynomial. CR POLYSIZE LL_CRC_SetPolynomialSize. More...
__STATIC_INLINE uint32_t	LL_CRC_GetPolynomialSize (CRC_TypeDef *CRCx)
	Return size of the polynomial. CR POLYSIZE LL_CRC_GetPolynomialSize. More...
__STATIC_INLINE void	LL_CRC_SetInputDataReverseMode (CRC_TypeDef *CRCx, uint32_t ReverseMode)
	Configure the reversal of the bit order of the input data CR REV_IN LL_CRC_SetInputDataReverseMode. More...
__STATIC_INLINE uint32_t	LL_CRC_GetInputDataReverseMode (CRC_TypeDef *CRCx)
	Return type of reversal for input data bit order CR REV_IN LL_CRC_GetInputDataReverseMode. More...
__STATIC_INLINE void	LL_CRC_SetOutputDataReverseMode (CRC_TypeDef *CRCx, uint32_t ReverseMode)
	Configure the reversal of the bit order of the Output data CR REV_OUT LL_CRC_SetOutputDataReverseMode. More...
__STATIC_INLINE uint32_t	LL_CRC_GetOutputDataReverseMode (CRC_TypeDef *CRCx)
	Configure the reversal of the bit order of the Output data CR REV_OUT LL_CRC_GetOutputDataReverseMode. More...
__STATIC_INLINE void	LL_CRC_SetInitialData (CRC_TypeDef *CRCx, uint32_t InitCrc)
	Initialize the Programmable initial CRC value. More...
__STATIC_INLINE uint32_t	LL_CRC_GetInitialData (CRC_TypeDef *CRCx)
	Return current Initial CRC value. More...
__STATIC_INLINE void	LL_CRC_SetPolynomialCoef (CRC_TypeDef *CRCx, uint32_t PolynomCoef)
	Initialize the Programmable polynomial value (coefficients of the polynomial to be used for CRC calculation). More...
__STATIC_INLINE uint32_t	LL_CRC_GetPolynomialCoef (CRC_TypeDef *CRCx)
	Return current Programmable polynomial value. More...

Detailed Description

Function Documentation

LL_CRC_GetInitialData()

__STATIC_INLINE uint32_t LL_CRC_GetInitialData

(

CRC_TypeDef *

CRCx

)

Return current Initial CRC value.

Note

If the CRC size is less than 32 bits, the least significant bits are used to read the correct value INIT INIT LL_CRC_GetInitialData

Parameters

CRCx	CRC Instance

Return values

Value

programmed in Programmable initial CRC value register

Definition at line 274 of file stm32l4xx_ll_crc.h.

{
  return (uint32_t)(READ_REG(CRCx->INIT));
}

LL_CRC_GetInputDataReverseMode()

__STATIC_INLINE uint32_t LL_CRC_GetInputDataReverseMode

(

CRC_TypeDef *

CRCx

)

Return type of reversal for input data bit order CR REV_IN LL_CRC_GetInputDataReverseMode.

Parameters

CRCx	CRC Instance

Return values

Returned

value can be one of the following values: LL_CRC_INDATA_REVERSE_NONE LL_CRC_INDATA_REVERSE_BYTE LL_CRC_INDATA_REVERSE_HALFWORD LL_CRC_INDATA_REVERSE_WORD

Definition at line 219 of file stm32l4xx_ll_crc.h.

{
  return (uint32_t)(READ_BIT(CRCx->CR, CRC_CR_REV_IN));
}

LL_CRC_GetOutputDataReverseMode()

__STATIC_INLINE uint32_t LL_CRC_GetOutputDataReverseMode

(

CRC_TypeDef *

CRCx

)

Configure the reversal of the bit order of the Output data CR REV_OUT LL_CRC_GetOutputDataReverseMode.

Parameters

CRCx	CRC Instance

Return values

Returned

value can be one of the following values: LL_CRC_OUTDATA_REVERSE_NONE LL_CRC_OUTDATA_REVERSE_BIT

Definition at line 246 of file stm32l4xx_ll_crc.h.

{
  return (uint32_t)(READ_BIT(CRCx->CR, CRC_CR_REV_OUT));
}

LL_CRC_GetPolynomialCoef()

__STATIC_INLINE uint32_t LL_CRC_GetPolynomialCoef

(

CRC_TypeDef *

CRCx

)

Return current Programmable polynomial value.

Note

Please check Reference Manual and existing Errata Sheets, regarding possible limitations for Polynomial values usage. For example, for a polynomial of degree 7, X^7 + X^6 + X^5 + X^2 + 1 is written 0x65 POL POL LL_CRC_GetPolynomialCoef

Parameters

CRCx	CRC Instance

Return values

Value

programmed in Programmable Polynomial value register

Definition at line 305 of file stm32l4xx_ll_crc.h.

{
  return (uint32_t)(READ_REG(CRCx->POL));
}

LL_CRC_GetPolynomialSize()

__STATIC_INLINE uint32_t LL_CRC_GetPolynomialSize

(

CRC_TypeDef *

CRCx

)

Return size of the polynomial. CR POLYSIZE LL_CRC_GetPolynomialSize.

Parameters

CRCx	CRC Instance

Return values

Returned

value can be one of the following values: LL_CRC_POLYLENGTH_32B LL_CRC_POLYLENGTH_16B LL_CRC_POLYLENGTH_8B LL_CRC_POLYLENGTH_7B

Definition at line 188 of file stm32l4xx_ll_crc.h.

{
  return (uint32_t)(READ_BIT(CRCx->CR, CRC_CR_POLYSIZE));
}

LL_CRC_ResetCRCCalculationUnit()

__STATIC_INLINE void LL_CRC_ResetCRCCalculationUnit

(

CRC_TypeDef *

CRCx

)

Reset the CRC calculation unit.

Note

If Programmable Initial CRC value feature is available, also set the Data Register to the value stored in the CRC_INIT register, otherwise, reset Data Register to its default value. CR RESET LL_CRC_ResetCRCCalculationUnit

Parameters

CRCx	CRC Instance

Return values

None

Definition at line 157 of file stm32l4xx_ll_crc.h.

{
  SET_BIT(CRCx->CR, CRC_CR_RESET);
}

LL_CRC_SetInitialData()

__STATIC_INLINE void LL_CRC_SetInitialData	(	CRC_TypeDef *	CRCx,
		uint32_t	InitCrc
	)

Initialize the Programmable initial CRC value.

Note

If the CRC size is less than 32 bits, the least significant bits are used to write the correct value

LL_CRC_DEFAULT_CRC_INITVALUE could be used as value for InitCrc parameter. INIT INIT LL_CRC_SetInitialData

Parameters

CRCx	CRC Instance
InitCrc	Value to be programmed in Programmable initial CRC value register

Return values

None

Definition at line 261 of file stm32l4xx_ll_crc.h.

{
  WRITE_REG(CRCx->INIT, InitCrc);
}

LL_CRC_SetInputDataReverseMode()

__STATIC_INLINE void LL_CRC_SetInputDataReverseMode	(	CRC_TypeDef *	CRCx,
		uint32_t	ReverseMode
	)

Configure the reversal of the bit order of the input data CR REV_IN LL_CRC_SetInputDataReverseMode.

Parameters

CRCx	CRC Instance
ReverseMode	This parameter can be one of the following values: LL_CRC_INDATA_REVERSE_NONE LL_CRC_INDATA_REVERSE_BYTE LL_CRC_INDATA_REVERSE_HALFWORD LL_CRC_INDATA_REVERSE_WORD

Return values

None

Definition at line 204 of file stm32l4xx_ll_crc.h.

{
  MODIFY_REG(CRCx->CR, CRC_CR_REV_IN, ReverseMode);
}

LL_CRC_SetOutputDataReverseMode()

__STATIC_INLINE void LL_CRC_SetOutputDataReverseMode	(	CRC_TypeDef *	CRCx,
		uint32_t	ReverseMode
	)

Configure the reversal of the bit order of the Output data CR REV_OUT LL_CRC_SetOutputDataReverseMode.

Parameters

CRCx	CRC Instance
ReverseMode	This parameter can be one of the following values: LL_CRC_OUTDATA_REVERSE_NONE LL_CRC_OUTDATA_REVERSE_BIT

Return values

None

Definition at line 233 of file stm32l4xx_ll_crc.h.

{
  MODIFY_REG(CRCx->CR, CRC_CR_REV_OUT, ReverseMode);
}

LL_CRC_SetPolynomialCoef()

__STATIC_INLINE void LL_CRC_SetPolynomialCoef	(	CRC_TypeDef *	CRCx,
		uint32_t	PolynomCoef
	)

Initialize the Programmable polynomial value (coefficients of the polynomial to be used for CRC calculation).

Note

LL_CRC_DEFAULT_CRC32_POLY could be used as value for PolynomCoef parameter.

Please check Reference Manual and existing Errata Sheets, regarding possible limitations for Polynomial values usage. For example, for a polynomial of degree 7, X^7 + X^6 + X^5 + X^2 + 1 is written 0x65 POL POL LL_CRC_SetPolynomialCoef

Parameters

CRCx	CRC Instance
PolynomCoef	Value to be programmed in Programmable Polynomial value register

Return values

None

Definition at line 291 of file stm32l4xx_ll_crc.h.

{
  WRITE_REG(CRCx->POL, PolynomCoef);
}

LL_CRC_SetPolynomialSize()

__STATIC_INLINE void LL_CRC_SetPolynomialSize	(	CRC_TypeDef *	CRCx,
		uint32_t	PolySize
	)

Configure size of the polynomial. CR POLYSIZE LL_CRC_SetPolynomialSize.

Parameters

CRCx	CRC Instance
PolySize	This parameter can be one of the following values: LL_CRC_POLYLENGTH_32B LL_CRC_POLYLENGTH_16B LL_CRC_POLYLENGTH_8B LL_CRC_POLYLENGTH_7B

Return values

None

Definition at line 173 of file stm32l4xx_ll_crc.h.

{
  MODIFY_REG(CRCx->CR, CRC_CR_POLYSIZE, PolySize);
}