CRC

Archiver

Joe-

Here are CRC8 and CRC16 subroutines suitable for the polynomials
employed to generate Dallas 1-Wire device CRC's. Clear CRC variables
prior to use, pass successive bytes to be added to CRC in variable
"this":

crc16 VAR WORD
crc8 VAR BYTE
j VAR BYTE

addToCRC16:
for j = 1 to 8
if this.LOWBIT ^ crc16 & 1 then feedBack1_16
feedBack0_16:
crc16 = crc16 >> 1 & ~$8000: GOTO nextBit_16
feedBack1_16:
crc16 = crc16 ^ $4002 >> 1 | $8000
nextBit_16:
this = this >> 1: NEXT: RETURN

addToCRC8:
FOR j = 1 TO 8
IF this.LOWBIT ^ crc8 & 1 THEN feedBack1_8
feedBack0_8:
crc8 = crc8 >> 1 & ~$80: GOTO nextBit_8
feedBack1_8:
crc8 = crc8 ^ $18 >> 1 | $80
nextBit_8:
this = this >> 1: NEXT: RETURN


Regards,

Steve

Archiver

Does anyone have a reasonably fast/simple CRC calculation routine that will
run on a BS2? Thanks.

Joe

Archiver

Is this the same Joe Greene I went to DeVry, Columbus with a couple years
ago?

Aaron Garber

On Tue, 8 May 2001 15:11:29 -0400 "Joseph Greene" <jlgreene@i...>
writes:
> Does anyone have a reasonably fast/simple CRC calculation routine
> that will
> run on a BS2? Thanks.
>
> Joe
>
>
>
>
>
>
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Archiver

Can someone explain to me what Crc is and how to implement it
into a incomming data stream on the bs2?

Thanks
Kevin

Archiver

Try these links:

http://ozma.ssl.berkeley.edu/~dbb/crc-code.htm

http://www.rad.com/networks/1994/err_con/crc.htm

Regards,

Leroy Hall

K Jones wrote:
>
> Can someone explain to me what Crc is and how to implement it
> into a incomming data stream on the bs2?
>
> Thanks
> Kevin
>
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Archiver

Hi kevin
CRC stands for cyclic redundancy cycle. Its rather complicated to
explain.I found it in
Basic Stamp second edition by Claus Kuhnel and Klaus Zahnert you might
want to look it up ,it tell how to implement CRC with a stamp

On Thu, 08 Nov 2001 21:51:43 -0000 "K Jones" <kj62@y...> writes:
> Can someone explain to me what Crc is and how to implement it
> into a incomming data stream on the bs2?
>
> Thanks
> Kevin
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the
> Subject and Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>