crc.h File Reference

CRC-16/CCITT checksum utility. More...

#include "spp/core/types.h"

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Macros
#define	K_SPP_CRC_POLY   (0x1021U)
	CRC-16/CCITT polynomial (0x1021).
#define	K_SPP_CRC_INIT   (0xFFFFU)
	CRC-16 initial value.

Functions
spp_uint16_t	SPP_UTIL_crc16 (const spp_uint8_t *p_data, spp_uint32_t length)
	Compute a CRC-16/CCITT checksum over a byte buffer.

Detailed Description

CRC-16/CCITT checksum utility.

Naming conventions used in this file:

• Constants/macros: K_SPP_CRC_*
• Public functions: SPP_UTIL_crc16()

Definition in file crc.h.

Macro Definition Documentation

K_SPP_CRC_POLY

#define K_SPP_CRC_POLY   (0x1021U)

CRC-16/CCITT polynomial (0x1021).

Definition at line 20 of file crc.h.

Referenced by SPP_UTIL_crc16().

K_SPP_CRC_INIT

#define K_SPP_CRC_INIT   (0xFFFFU)

CRC-16 initial value.

Definition at line 23 of file crc.h.

Referenced by SPP_UTIL_crc16().

Function Documentation

SPP_UTIL_crc16()

spp_uint16_t SPP_UTIL_crc16	(	const spp_uint8_t *	p_data,
		spp_uint32_t	length )

Compute a CRC-16/CCITT checksum over a byte buffer.

Parameters

[in]	p_data	Pointer to the data buffer.
[in]	length	Number of bytes to process.

Returns

16-bit CRC value.

Definition at line 8 of file crc.c.

References K_SPP_CRC_INIT, K_SPP_CRC_POLY, and SPP_UTIL_crc16().

Referenced by packetCrc(), and SPP_UTIL_crc16().

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