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Extended Initialization/de-initialization functions
Functions

Extended Initialization/de-initialization functions
[CRC Extended Exported Functions]

Extended Initialization and Configuration functions. More...

Functions

HAL_StatusTypeDef HAL_CRCEx_Polynomial_Set (CRC_HandleTypeDef *hcrc, uint32_t Pol, uint32_t PolyLength)
 Initialize the CRC polynomial if different from default one.
HAL_StatusTypeDef HAL_CRCEx_Input_Data_Reverse (CRC_HandleTypeDef *hcrc, uint32_t InputReverseMode)
 Set the Reverse Input data mode.
HAL_StatusTypeDef HAL_CRCEx_Output_Data_Reverse (CRC_HandleTypeDef *hcrc, uint32_t OutputReverseMode)
 Set the Reverse Output data mode.

Detailed Description

Extended Initialization and Configuration functions. 

 ===============================================================================
            ##### Extended configuration functions #####
 ===============================================================================
    [..]  This section provides functions allowing to:
      (+) Configure the generating polynomial
      (+) Configure the input data inversion
      (+) Configure the output data inversion

Function Documentation

HAL_StatusTypeDef HAL_CRCEx_Input_Data_Reverse ( CRC_HandleTypeDef *  hcrc,
uint32_t  InputReverseMode 
)

Set the Reverse Input data mode.

Parameters:
hcrc,:CRC handle
InputReverseMode,:Input Data inversion mode. This parameter can be one of the following values:

  • CRC_INPUTDATA_INVERSION_NONE no change in bit order (default value)
  • CRC_INPUTDATA_INVERSION_BYTE Byte-wise bit reversal
  • CRC_INPUTDATA_INVERSION_HALFWORD HalfWord-wise bit reversal
  • CRC_INPUTDATA_INVERSION_WORD Word-wise bit reversal
Return values:
HALstatus

Definition at line 171 of file stm32l4xx_hal_crc_ex.c.

HAL_StatusTypeDef HAL_CRCEx_Output_Data_Reverse ( CRC_HandleTypeDef *  hcrc,
uint32_t  OutputReverseMode 
)

Set the Reverse Output data mode.

Parameters:
hcrc,:CRC handle
OutputReverseMode,:Output Data inversion mode. This parameter can be one of the following values:

  • CRC_OUTPUTDATA_INVERSION_DISABLE no CRC inversion (default value)
  • CRC_OUTPUTDATA_INVERSION_ENABLE bit-level inversion (e.g. for a 8-bit CRC: 0xB5 becomes 0xAD)
Return values:
HALstatus

Definition at line 197 of file stm32l4xx_hal_crc_ex.c.

HAL_StatusTypeDef HAL_CRCEx_Polynomial_Set ( CRC_HandleTypeDef *  hcrc,
uint32_t  Pol,
uint32_t  PolyLength 
)

Initialize the CRC polynomial if different from default one.

Parameters:
hcrc,:CRC handle
Pol,:CRC generating polynomial (7, 8, 16 or 32-bit long). This parameter is written in normal representation, e.g.

  • for a polynomial of degree 7, X^7 + X^6 + X^5 + X^2 + 1 is written 0x65
  • for a polynomial of degree 16, X^16 + X^12 + X^5 + 1 is written 0x1021
PolyLength,:CRC polynomial length. This parameter can be one of the following values:

  • CRC_POLYLENGTH_7B 7-bit long CRC (generating polynomial of degree 7)
  • CRC_POLYLENGTH_8B 8-bit long CRC (generating polynomial of degree 8)
  • CRC_POLYLENGTH_16B 16-bit long CRC (generating polynomial of degree 16)
  • CRC_POLYLENGTH_32B 32-bit long CRC (generating polynomial of degree 32)
Return values:
HALstatus

Definition at line 107 of file stm32l4xx_hal_crc_ex.c.

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