CRC Exported Types

Data Structures
struct	CRC_InitTypeDef
	CRC Init Structure definition. More...
struct	CRC_HandleTypeDef
	CRC Handle Structure definition. More...

Enumerations
enum	HAL_CRC_StateTypeDef {   HAL_CRC_STATE_RESET = 0x00U, HAL_CRC_STATE_READY = 0x01U, HAL_CRC_STATE_BUSY = 0x02U, HAL_CRC_STATE_TIMEOUT = 0x03U,   HAL_CRC_STATE_ERROR = 0x04U }
	CRC HAL State Structure definition. More...

Detailed Description

---

Data Structure Documentation

CRC_InitTypeDef

struct CRC_InitTypeDef

CRC Init Structure definition.

Definition at line 59 of file stm32l4xx_hal_crc.h.

Data Fields
uint32_t	CRCLength	This parameter is a value of Polynomial sizes to configure the peripheral and indicates CRC length. Value can be either one of CRC_POLYLENGTH_32B (32-bit CRC), CRC_POLYLENGTH_16B (16-bit CRC), CRC_POLYLENGTH_8B (8-bit CRC), CRC_POLYLENGTH_7B (7-bit CRC).
uint8_t	DefaultInitValueUse	This parameter is a value of Indicates whether or not default init value is used and indicates if default init value is used. If set to DEFAULT_INIT_VALUE_ENABLE, resort to default 0xFFFFFFFF value. In that case, there is no need to set InitValue field. If otherwise set to DEFAULT_INIT_VALUE_DISABLE, InitValue field must be set.
uint8_t	DefaultPolynomialUse	This parameter is a value of Indicates whether or not default polynomial is used and indicates if default polynomial is used. If set to DEFAULT_POLYNOMIAL_ENABLE, resort to default X^32 + X^26 + X^23 + X^22 + X^16 + X^12 + X^11 + X^10 +X^8 + X^7 + X^5 + X^4 + X^2+ X +1. In that case, there is no need to set GeneratingPolynomial field. If otherwise set to DEFAULT_POLYNOMIAL_DISABLE, GeneratingPolynomial and CRCLength fields must be set.
uint32_t	GeneratingPolynomial	Set CRC generating polynomial as a 7, 8, 16 or 32-bit long value for a polynomial degree respectively equal to 7, 8, 16 or 32. This field 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. No need to specify it if DefaultPolynomialUse is set to DEFAULT_POLYNOMIAL_ENABLE.
uint32_t	InitValue	Init value to initiate CRC computation. No need to specify it if DefaultInitValueUse is set to DEFAULT_INIT_VALUE_ENABLE.
uint32_t	InputDataInversionMode	This parameter is a value of Input Data Inversion Modes and specifies input data inversion mode. Can be either one of the following values CRC_INPUTDATA_INVERSION_NONE no input data inversion CRC_INPUTDATA_INVERSION_BYTE byte-wise inversion, 0x1A2B3C4D becomes 0x58D43CB2 CRC_INPUTDATA_INVERSION_HALFWORD halfword-wise inversion, 0x1A2B3C4D becomes 0xD458B23C CRC_INPUTDATA_INVERSION_WORD word-wise inversion, 0x1A2B3C4D becomes 0xB23CD458
uint32_t	OutputDataInversionMode	This parameter is a value of Output Data Inversion Modes and specifies output data (i.e. CRC) inversion mode. Can be either CRC_OUTPUTDATA_INVERSION_DISABLE no CRC inversion, CRC_OUTPUTDATA_INVERSION_ENABLE CRC 0x11223344 is converted into 0x22CC4488

CRC_HandleTypeDef

struct CRC_HandleTypeDef

CRC Handle Structure definition.

Definition at line 103 of file stm32l4xx_hal_crc.h.

Data Fields
CRC_InitTypeDef	Init	CRC configuration parameters
uint32_t	InputDataFormat	This parameter is a value of Input Buffer Format and specifies input data format. Can be either CRC_INPUTDATA_FORMAT_BYTES input data is a stream of bytes (8-bit data) CRC_INPUTDATA_FORMAT_HALFWORDS input data is a stream of half-words (16-bit data) CRC_INPUTDATA_FORMAT_WORDS input data is a stream of words (32-bit data) Note that constant CRC_INPUT_FORMAT_UNDEFINED is defined but an initialization error must occur if InputBufferFormat is not one of the three values listed above
CRC_TypeDef *	Instance	Register base address
HAL_LockTypeDef	Lock	CRC Locking object
__IO HAL_CRC_StateTypeDef	State	CRC communication state

Enumeration Type Documentation

HAL_CRC_StateTypeDef

enum HAL_CRC_StateTypeDef

CRC HAL State Structure definition.

Enumerator
HAL_CRC_STATE_RESET	CRC not yet initialized or disabled
HAL_CRC_STATE_READY	CRC initialized and ready for use
HAL_CRC_STATE_BUSY	CRC internal process is ongoing
HAL_CRC_STATE_TIMEOUT	CRC timeout state
HAL_CRC_STATE_ERROR	CRC error state

Definition at line 47 of file stm32l4xx_hal_crc.h.

{
  HAL_CRC_STATE_RESET     = 0x00U,  
  HAL_CRC_STATE_READY     = 0x01U,  
  HAL_CRC_STATE_BUSY      = 0x02U,  
  HAL_CRC_STATE_TIMEOUT   = 0x03U,  
  HAL_CRC_STATE_ERROR     = 0x04U   
} HAL_CRC_StateTypeDef;