hdlc_common.c File Reference

#include "hdlc_common.h"
#include <stddef.h>
#include <stdint.h>

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Macros
#define	HDLC_CRC16_CCITT_INIT   0xFFFFu
#define	HDLC_CRC16_CCITT_POLY   0x1021u
#define	HDLC_CRC16_CCITT_MSB_MASK   0x8000u
#define	HDLC_CRC16_BITS_PER_BYTE   8u

Functions
static uint16_t	crc16_ccitt_false (const uint8_t *payload, size_t num_bytes)
uint16_t	hdlc_crc16 (const uint8_t *payload, size_t num_bytes)
	Compute HDLC CRC16 (FCS) over a payload.

Macro Definition Documentation

HDLC_CRC16_BITS_PER_BYTE

#define HDLC_CRC16_BITS_PER_BYTE   8u

Definition at line 26 of file hdlc_common.c.

HDLC_CRC16_CCITT_INIT

#define HDLC_CRC16_CCITT_INIT   0xFFFFu

Definition at line 23 of file hdlc_common.c.

HDLC_CRC16_CCITT_MSB_MASK

#define HDLC_CRC16_CCITT_MSB_MASK   0x8000u

Definition at line 25 of file hdlc_common.c.

HDLC_CRC16_CCITT_POLY

#define HDLC_CRC16_CCITT_POLY   0x1021u

Definition at line 24 of file hdlc_common.c.

Function Documentation

crc16_ccitt_false()

static uint16_t crc16_ccitt_false ( const uint8_t *  payload, size_t  num_bytes  )

static

Definition at line 28 of file hdlc_common.c.

References HDLC_CRC16_BITS_PER_BYTE, HDLC_CRC16_CCITT_INIT, HDLC_CRC16_CCITT_MSB_MASK, and HDLC_CRC16_CCITT_POLY.

Referenced by hdlc_crc16().

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hdlc_crc16()

uint16_t hdlc_crc16	(	const uint8_t *	payload,
		size_t	num_bytes
	)

Compute HDLC CRC16 (FCS) over a payload.

Parameters

payload	Input data bytes.
num_bytes	Number of bytes in payload.

Returns

Computed CRC16 value.

Definition at line 45 of file hdlc_common.c.

References crc16_ccitt_false().

Referenced by hdlc_decode(), hdlc_decode_byte(), hdlc_encode(), and hdlc_encode_byte().

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