See Cyclic Redundancy Code (CRC) for detailed documentation.

License#

Copyright 2018 Silicon Laboratories Inc. www.silabs.com

The licensor of this software is Silicon Laboratories Inc. Your use of this software is governed by the terms of Silicon Labs Master Software License Agreement (MSLA) available at www.silabs.com/about-us/legal/master-software-license-agreement. This software is distributed to you in Source Code format and is governed by the sections of the MSLA applicable to Source Code. 

/***************************************************************************/
#ifndef __CRC_H__
#define __CRC_H__

uint16_t halCommonCrc16(uint8_t newByte, uint16_t prevResult);

uint32_t halCommonCrc32(uint8_t newByte, uint32_t prevResult);

// Commonly used initial and expected final CRC32 values
#define INITIAL_CRC             0xFFFFFFFFL
#define CRC32_START             INITIAL_CRC
#define CRC32_END               0xDEBB20E3L  // For CRC32 POLYNOMIAL run LSB-MSB

#endif //__CRC_H__

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).

uint32_t
halCommonCrc32(uint8_t newByte, uint32_t prevResult)

Calculates 32-bit cyclic redundancy code.

Macro Definition Documentation#

INITIAL_CRC#

#define INITIAL_CRC
Value:
0xFFFFFFFFL

Definition at line 58 of file /mnt/raid/workspaces/ws.S2kiimDMR/overlay/gsdk/platform/base/hal/micro/crc.h

CRC32_START#

#define CRC32_START
Value:
INITIAL_CRC

Definition at line 59 of file /mnt/raid/workspaces/ws.S2kiimDMR/overlay/gsdk/platform/base/hal/micro/crc.h

CRC32_END#

#define CRC32_END
Value:
0xDEBB20E3L

Definition at line 60 of file /mnt/raid/workspaces/ws.S2kiimDMR/overlay/gsdk/platform/base/hal/micro/crc.h

Function Documentation#

halCommonCrc16#

uint16_t halCommonCrc16 (uint8_t newByte, uint16_t prevResult)

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

Parameters
N/AnewByte

The new byte to be run through CRC.

N/AprevResult

The previous CRC result.

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.

Returns

  • The new CRC result.


Definition at line 38 of file /mnt/raid/workspaces/ws.S2kiimDMR/overlay/gsdk/platform/base/hal/micro/crc.h

halCommonCrc32#

uint32_t halCommonCrc32 (uint8_t newByte, uint32_t prevResult)

Calculates 32-bit cyclic redundancy code.

Parameters
N/AnewByte

The new byte to be run through CRC.

N/AprevResult

The previous CRC result.

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.

Returns

  • The new CRC result.


Definition at line 55 of file /mnt/raid/workspaces/ws.S2kiimDMR/overlay/gsdk/platform/base/hal/micro/crc.h