Scott wrote:
>
> Tony
>
>         I did not expect to get a response so fast, thanks.  However the
> code that you supplied executed in exactly the same way as my original
> code.  It seems that when I rrf the a register the first bit is sent to the
> carry.  When the instruction comes around a second time it again shifts the
> first bit into the carry instead of the second bit.
>

Yes, that would be correct because you read PortA again and reloaded
'Temp' with this data.

However, if any switches are set, then the appropriate 'code_x' routine
will have executed before returning to the loop. I guess you have
appropriate code in these routines to handle debouncing, use switch once
and discard, or repeat, and to detect when it releases.

It is best to read the port once to get the switch information, rather
than to use the 'rrf' instruction on it repeatedly.

--
Best regards

Tony

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