This chapter provides reference material for the CRC (Cyclic Redundancy Check) functions. It is divided into the following sections:
CRC Functions and Macros
The header file Crc.h declares the API that this chapter describes.
CRC Functions and Macros
Crc16CalcBigBlock Function
Purpose
Calculate the 16-bit CRC (Cyclic Redundancy Check) of a large data block (> 64K bytes) using the table lookup method. A CRC is one of many mathematical ways of checking data for corruption, similar to a checksum but mathematically more complex.
Declared In
Crc.h Prototype
uint16_t Crc16CalcBigBlock ( void*bufP, uint32_tcount, uint16_tcrc)
Parameters
Returns
A 16-bit CRC for the data buffer.
See Also
Crc16CalcBlock, Crc32CalcBlock
Crc16CalcBlock Function
Purpose
Calculate the 16-bit CRC (Cyclic Redundancy Check) of a data block using the table lookup method. A CRC is one of many mathematical ways of checking data for corruption, similar to a checksum but mathematically more complex.
Declared In
Declared In
Crc.h Prototype
uint16_t Crc16CalcBlock ( const void*bufP, uint16_tcount, uint16_tcrc)
Parameters
Returns
A 16-bit CRC for the data buffer.
Comments
The data block must be less than or equal to 64K bytes in length. For larger data blocks, use Crc16CalcBigBlock. To obtain a 32-bit CRC value, use Crc32CalcBlock.
Crc32CalcBlock Function
Purpose
Calculate the 32-bit CRC (Cyclic Redundancy Check) of a data block using the table lookup method. A CRC is one of many mathematical ways of checking data for corruption, similar to a checksum but mathematically more complex.
Declared In
Crc.h Prototype
uint32_t Crc32CalcBlock ( const void*bufP, uint16_tcount, uint32_tcrc)
Parameters
Returns
A 32-bit CRC for the data buffer.
Comments
The data block must be less than or equal to 64K bytes in length.
See Also
Crc16CalcBigBlock, Crc16CalcBlock