RE: Re: Jog Dial - where can I buy ?

["Hawes,Timothy Edward (GEG)" <haweste@xxxxxxx>]

Thanks Dave.

Tim H.


> -----Original Message-----
> From: Ward, David
>
> Try this link for info on the serial mouse protocol -
> http://www.hut.fi/~then/mytexts/mouse.html
>
> IRRC www.Microchip.com make a micro that's a per-programmed
> Mouse controller
> -
>  the data sheet for that is very useful when trying to
> understand how the
> mouse operates
>
> Just watch out for the type of mouse (3 or 5 byte) and the
> number of data
> bits
> You'll also need to set DTR & RTS to power the mouse
>
> Dave
>
> -----Original Message-----
> From: Hawes,Timothy Edward (GEG)
>
> Patrick,
>
> Ahh, good. I didn't think writing a driver would be easy. All
> I need the jog
> dial to do is to move up and down menu selections, or through
> song / album /
> playlist titles etc. Pushing the dial would select the item /
> song etc. I
> wouldn't want the "pointer" have free reign of the screen -
> I'd want it
> locked to the available selections (rather like using the
"tab" key in
> Windows dialog box). I presume the VB method you mention
> would allow this
> (VB's not my strong point either :-(  ). Is Girder also
> suitable for this,
> AIUI it does more than just infrared stuff ?
>
> Re-using the circuit from an old mouse (or even a new one
> with more buttons)
> sounds like the way to go - it means I can have a few more
> hard buttons
> without too much extra work.
>
> Thanks,
>
> Tim H.
>
> > -----Original Message-----
> > From: Patrick Lidstone
> >
> > --- In ukha_d@xxxxxxx, "Hawes,Timothy Edward (GEG)"
> > <haweste@a...> wrote:
> > > Paul,
> > >
> > > What's a good starting point to learn how to write device
> drivers ?
> > I had a look last night and do have a couple of old serial
> mice that
> > I could butcher the decoder circuit from.
> > >
> >
> > You don't need to write a device driver just to interface the
wheel
> > unless you are going to integrate your jog dial into the OS
itself.
> > If you just want to do something "programatic", it's
simply a
> > question of (say) using a the Visual basic serial control
> and reverse-
> > engineering the serial protocol (I imagine google would help with
> > this).
> >
> > If you really do need to write a device driver, then either
> get hold
> > of the Microsoft Developers Network DDK (MSDN DDK) or trawl the
MS
> > site for the DDK (although I *think* they withdrew it about
> 6 months
> > ago). I warn you, it's a big job.
> >
> > Patrick
>
> +
>
>
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