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Vb.net CRC16 calculator

Hi I need a little help
I am trying to calculate crc-16 checksum in VB.net
I need to use polynomial 1021 with the input and result reflected,
initial value of 0 and final Xor value 0xFFFF
so if I input Bytes FF FF FF FF 00 0B 66 1A a CRC of 2CFB is returned
I have found an online JavaScript tool at http://www.sunshine2k.de/coding/javascript/crc/crc_js.html but I need it in Vb.Net and have no idea how to convert the code

a simple textbox and Button vb.net app would be perfect

Dr. Klahn

Which version of CRC-16 are you trying to calculate? There are about a dozen and they are not interchangeable.

greenbug2002

ASKER

Hi Thanks for the Reply
its a CCITT Version
•Width = 16 bits
•Truncated polynomial = 0x1021
•Initial value = 0
•Input data is reflected
•Output CRC is reflected
• XOR 0xFFFF is performed on the output CRC
hope this helps

SOLUTION

Dr. Klahn

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greenbug2002

ASKER

Hi thanks I did look at that and had an extensive google around trying to figure it out for myself but the code used its a bit beyond me I am quite new to programing could you pull it into a working example?

greenbug2002

ASKER

Also looking at the code I don't think it has support for reflecting the input and output

ASKER CERTIFIED SOLUTION

David Johnson, CD

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greenbug2002

ASKER

Hi Thanks for the replay I did but its not capable of reflecting the input and output and I have no idea how to program it to

Dr. Klahn

Two correct references to available solutions provided. No further input from requester. Points assigned to contributors.