bitwise operation fragment

[igurov]

for an input AA30D203175835240509 for the Byte_Input and 0800 for the CRC_REG, which is always the same I should get 0460 as output, but ...

[dan_u]

So based on that information you expect people can help you? You have an input value and you know what output you want, there's many options to achieve that...

For your initial question, some hints in the screenshot.

[Rod42]

Hi,

Check the help message for "Number to Boolean array" and you'll see that the output array has the same number of elements as there are bits in the input integer. To see what type a wire is, turn context help on, then hover the mouse on the wire.

BTW, You almost certainly won't need to convert your CRC to a bool array to do bit arithmetic. Remember that the AND, OR, etc functions are not just for booleans. If you use integers for inputs to the logical functions, you get a bitwise operation.

Rod.

[GerdW · Accepted solution]

Hi igurov,

has nobody told you LV functions are mostly polymorph? And there is some "auto-indexing"? See attachment

[igurov]

lol 🙂 thx a lot, it looks much better than mine, but still does not return the correct result

[GerdW]

Hi igurov,

"still does not return the correct result " 

Well, it's your code-fragment transflated to LabVIEW to my best knowledge

And you didn't state if your example string is in hex display or plain ASCII and does it contain that checksum at the end or not (not that any combination will result in the expected result...)

Message Edited by GerdW on 08-20-2009 11:37 AM

[igurov]

I will check it again. Thanks a lot anyway!

[igurov]

And btw, can I convert the unsigned 16 bit word to two 8 bit bytes, in other words just to split it.

[dan_u]

Yes. Use the split function...

http://zone.ni.com/reference/en-XX/help/371361E-01/glang/split_number/

[wha@atmel]

Dear wireworkers,

what a big screen do you use ?? 

As often as I can - I first try to find a solution in I - net ( if a problem seems not easy to solve for me ..... )

Find attached a   succesfully re-used CRC - Program.  This is the unchanged version I found.

Try to use it.

Regards

wha