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

 

 

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) '494976085
End

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