On Mon, Jun 10, 2013 at 9:32 PM,  <alan.b.pearce@stfc.ac.uk> wrote:
>> But, still the issue persists that the increments are in the order of 4,=
 decrements
>> too..
>
> I haven't worked through the code, but the coder could be using every edg=
e as a count, thereby getting a 4x resolution, but only updating the counte=
r on a certain edge.
>
> Does this make sense to how you work through the code?

Ummm ... bingo.

PORTB change on interrupt will cause 4 changes altogether, rather than 1.!

Thanks, much appreciated.

Regards,

Manu
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