Why Labview does'nt support splitting of a byte into two nibbles

[danil33]

Hi,

      It is written in the help of  'Split Number Function' that "If you wire an 8-bit integer input, this function does not split the number."Why  Labview does'nt support splitting of a byte into two nibbles??Some times we need to split a byte into nibbles.It is programatically possible with a loop and shiftregister.But Iam asking this because we already have a Split Number Function then why not providing another to split a byte into two nibbles??

1 Byte                            Nibbles                                        

[altenbach]

Probably because LabVIEW does not have a nibble datatype (4bits). 🙂

It would keep the data as U8 and pad with zeroes on the right. Splitting a byte into two U8, each containing the value of one nibble does not require a loop or shift register. It is a very simple, near atomic operation. Try it. 🙂

[altenbach]

> ... and pad with zeroes on the right

Sorry, I meant of course pad on the left. 😉

Here's a quick code draft. Make it into a simple subVI if you want. 😄

[danil33]

Sorry I mistakenly written "It is programatically possible with a loop and shiftregister".Yes the code you provided is simple.

Thank you

[smercurio_fc]

I don't know of any modern language that has a nibble data type. In C you'd use a macro to get the two bytes to do the same thing altenbach showed.

What would be the advantage of having this datatype added?

[altenbach]

You can also do the following, even simpler, maybe slightly slower (not tested).

[AristosQueue (NI)]

At some point, it doesn't make sense to split further because the memory space is not addressable at any size less than a byte on any platform LV supports. Once you get below a byte, you have the bit shifting tools to extract a particular bit's value, but you have to store the result as at least a byte.

[X.]

Can you split a bit?

[falkpl]

With a large enough bit accelerator you should be able to split a bit? 

[altenbach]

Later you can store it on a HD coated with magnetic monopoles. 😄