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Adler-32 Checksum

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Message 1 of 9
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Hi MrFuppes,

 

have you tried to implement this yourself?

It seems pretty easy with just 2 shift registers in a loop…

Best regards,
GerdW


using LV2016/2019/2021 on Win10/11+cRIO, TestStand2016/2019
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Message 2 of 9
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Hi GerdW,

not yet, but will do so I guess if there are no "stock" .vi available...

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Here's an implementation:

 

grafik.png

 

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Hi MrFuppes,

 

you see: really easy!

 

You can delete the ArraySize node, autoindexing at the loop tunnel is all you need…

Best regards,
GerdW


using LV2016/2019/2021 on Win10/11+cRIO, TestStand2016/2019
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sure, & thanks. still need to get used to programming in LV 😉

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Solution
Accepted by topic author MrFuppes

The Adler-32 solution by MrFuppes is incorrect for large data sets.  The high (B, s2) and low (A, s1) should be converted to U32 prior to the add and modulus.

 

Adler-32.png

 

Example:

"abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"

ADLER-32: 0x09832C7D

Message 7 of 9
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rcpacini,

thank you for reporting this! Kind of a stupid mistake... unfortunately it seems I cannot remove the code I posted. I've marked your answer as 'solution', I hope this helps.

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Go to your post, click the "Options" dropdown, then "Report to a moderator". In that field, explain you'd like to remove the attachment since there's a bug, and they can edit the post for you.

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