Functions that provide access to cyclic redundancy code (CRC) calculation. See crc.h for source code. More...

Macros
#define	INITIAL_CRC 0xFFFFFFFFL

#define	CRC32_START INITIAL_CRC

#define	CRC32_END 0xDEBB20E3L

Functions
uint16_t	halCommonCrc16 (uint8_t newByte, uint16_t prevResult)
	Calculates 16-bit cyclic redundancy code (CITT CRC 16). More...

uint32_t	halCommonCrc32 (uint8_t newByte, uint32_t prevResult)
	Calculates 32-bit cyclic redundancy code. More...

Detailed Description

Functions that provide access to cyclic redundancy code (CRC) calculation. See crc.h for source code.

Macro Definition Documentation

◆ CRC32_END

#define CRC32_END 0xDEBB20E3L

Definition at line 60 of file crc.h .

◆ CRC32_START

#define CRC32_START INITIAL_CRC

Definition at line 59 of file crc.h .

◆ INITIAL_CRC

#define INITIAL_CRC 0xFFFFFFFFL

Definition at line 58 of file crc.h .

Function Documentation

◆ halCommonCrc16()

uint16_t halCommonCrc16	(	uint8_t	`newByte,`
		uint16_t	`prevResult`
	)

Calculates 16-bit cyclic redundancy code (CITT CRC 16).

Applies the standard CITT CRC 16 polynomial to a single byte. It should support being called first with an initial value, then repeatedly until all data is processed.

Parameters

`newByte`	The new byte to be run through CRC.
`prevResult`	The previous CRC result.

Returns: The new CRC result.

◆ halCommonCrc32()

uint32_t halCommonCrc32	(	uint8_t	`newByte,`
		uint32_t	`prevResult`
	)

Calculates 32-bit cyclic redundancy code.

Note: On some radios or micros, the CRC for error detection on packet data is calculated in hardware.

Applies a CRC32 polynomial to a single byte. It should support being called first with an initial value, then repeatedly until all data is processed.