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

["Ward, David" <David.Ward@xxxxxxx>]

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) [mailto:haweste@xxxxxxx]
Sent: Friday, May 23, 2003 4:02 PM
To: ukha_d@xxxxxxx
Subject: RE: [ukha_d] Re: Jog Dial - where can I buy ?


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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