CRC-16 (Polynomium 8005)

[Bo Kronback]

Hello.

I search for a CRC VI that could generate CRC-16 based on the 8005 polynomium.
For crc freaks: checkout this fabolous CRC calculator:

http://rcswww.urz.tu-dresden.de/~sr21/crc.html

[Nadav_Chernin]

This is crc16 that i wrote for my applications.
You have include to your project directory also crc16.dll.

Nadav Chernin
nadav@progland.com

[jdownzarzap1]

I got the unexpected answer (crc differs from the one provided as an example).
Could somebody comment on this?
block: EA60 A102 0400 crc: 3E16 (expect 2D27)

Thanks

Janusz Downar

[Dr._Imad]

It depends on how you intialize the algorithm and on whether you are reversing the sequence or not

Refer to the following discussion thread.. Has vi's that are purely G, no .dll

http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RPAGEID=135&HOID=50650000000800000021AF0000&UCATEGORY_0=_49_%24_6_&UCATEGORY_S=0&USEARCHCONTEXT_TIER_0=0&USEARCHCONTEXT_TIER_S=0&USEARCHCONTEXT_QUESTION_0=ccitt&USEARCHCONTEXT_QUESTION_S=0

[MKES]

Nadav,

I'm interested in what were conditions for your CRC-16 .DLL... I was trying to create a comm driver for an equipment that use CRC-16 as part of comm strings by RS-232.

This equipment's documentation only mentioned that it uses CRC-16 as part of its communications protocol but not details about what variations for CRC-16 were used (initial value, reversed bytes,... etc). I was trying some of those variations but none give me results as espected... YOURS DID IT !!

Could you provide that info on what variation of CRC-16 is used at your code??

Thanks in advance !!

[vila]

why your zip can't open?

_______________

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Message Edited by vila on 03-25-2009 02:18 AM

[Mathan]

Its opening for me. I don't know why u can't. I just attached the file here inside that zip.