Defines | Functions
crc_ccitt.h File Reference

CCITT Cyclic Redundancy Check (CRC-CCITT). More...

#include <cfg/compiler.h>
#include <cpu/pgm.h>

Go to the source code of this file.

Defines

#define CRC_CCITT_INIT_VAL   ((uint16_t)0xFFFF)
 CRC-CCITT init value.

Functions

uint16_t updcrc_ccitt (uint8_t c, uint16_t oldcrc)
 Compute the updated CRC-CCITT value for one octet (inline version)
uint16_t crc_ccitt (uint16_t crc, const void *buf, size_t len)
 This function implements the CRC-CCITT calculation on a buffer.

Detailed Description

CCITT Cyclic Redundancy Check (CRC-CCITT).

Note:
This algorithm is incompatible with the CRC16.
Author:
Francesco Sacchi <batt@develer.com>

Definition in file crc_ccitt.h.

Function Documentation

uint16_t crc_ccitt ( uint16_t  crc,
const void *  buf,
size_t  len 
)

This function implements the CRC-CCITT calculation on a buffer.

Parameters:
crcCurrent CRC-CCITT value.
bufThe buffer to perform CRC calculation on.
lenThe length of the Buffer.
Returns:
The updated CRC-CCITT value.

Definition at line 75 of file crc_ccitt.c.