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

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

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

+