CRC32

CRC32

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Action

Returns the CRC32 value of a variable.

 

 

Syntax

Var = CRC32( source , L)

 

 

Remarks

Var

The LONG variable that is assigned with the CRC32 of variable source.

Source

The source variable or first element of the array to get the CRC

32 value from.

L

The number of bytes to check. This can be a word variable.

 

CRC32 is used in communication protocols to check if there are no transmission errors.

 

 

See also

CHECKSUM , CRC8, CRC16 , CRC16UNI , TCPCHECKSUM , CRCMB , CRC8UNI

 

 

Example

$regfile = "m48def.dat"                                   ' specify the used micro

$crystal = 8000000                                         ' used crystal frequency

$baud = 19200                                               ' use baud rate

$hwstack = 32                                               ' default use 32 for the hardware stack

$swstack = 10                                               ' default use 10 for the SW stack

$framesize = 40                                             ' default use 40 for the frame space

 

Config Com1 = Dummy , Synchrone = 0 , Parity = None , Stopbits = 1 , Databits = 8 , Clockpol = 0

 

 

Dim Ar(10) As Byte

Dim J As Byte

Dim W As Word

Dim L As Long

 

Ar(1) = 1

Ar(2) = 2

Ar(3) = 3

 

J = Crc8(ar(1) , 3)                                       'calculate value which is 216

W = Crc16(ar(1) , 3)                                       '24881

L = Crc32(ar(1) , 3)                                       '1438416925

End