Getting nybbles

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mikew01 - 26 Mar 2007 17:41 GMT

Hi, I need to split up a byte value into two nybbles, I understand bit
shifting is the ideal method to perform this task.

Could someone explain how to do this please.

TIA

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Daniel Pitts - 26 Mar 2007 18:00 GMT

> Hi, I need to split up a byte value into two nybbles, I understand bit
> shifting is the ideal method to perform this task.
>
> Could someone explain how to do this please.
>
> TIA

Well, a nibble is 4 bits, and a byte is 8 bits.

You need to mask part of the byte using binary and (&). 00001111 in
binary = 15 dec and 0xF hex.

lowNib = myByte & 0xF;

Then you need to make the high nibble in myByte the low nibble:

highNib = (myByte >> 4) & 0xF;

Hope this explains it. Good luck,
Daniel.

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mikew01 - 27 Mar 2007 09:02 GMT

Thanks for your help.

> Well, a nibble is 4 bits, and a byte is 8 bits.
>
[quoted text clipped - 9 lines]
> Hope this explains it. Good luck,
> Daniel.

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