> I don't get it, your design uses 3 byte packet, Microchip
> AN519 uses 5 byte packet. The person asking needs a 3
>  byte packet s/w. Isn't that what your does ? or are there
> other things that he needs from the AN519 one ?

Yes that's exactly what I was going to ask him. The big difference
between mine and AN519 is that AN519 describes building an
optical mouse, which entails reading the IR sensors. Mine is simply
code to generate mouse comms. The "sensors" can be switches
or anything that changes the state of the input pins. I'm not totally
clear why he wants to ignore my code and circuit and start from
scratch. I certainly don't have time or the inclination to re-write
AN519 AND make a circuit to test it. Gimme $1000 (up front) to
drop what I'm doing and maybe I would

Alan B. Pearce wrote

> IIRC the M$ 3 byte packet is a subset of the 5 byte packet - or
> to be more correct the 5 byte packet is a kludge around the M$
> 3 byte packet to get the extra information for the third button etc.
> There is any amount of information out on the 'net about these
> formats

Some people aren't very good at looking things up, despite some
nudging and prompting

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