[simpits-tech] Odd control issue with XP...
Ben Jones
bjones at pipecomp.com.au
Sat Nov 24 22:59:47 PST 2012
Sounds like a A2D converter has gone on the fritz. Time to crack out the Scope and Bus pirate and have a poke around :)
Ben
West Oz
-----Original Message-----
From: simpits-tech-bounces at simpits.org [mailto:simpits-tech-bounces at simpits.org] On Behalf Of dabigboy at cox.net
Sent: Sunday, 25 November 2012 2:38 PM
To: Simulator Cockpit Builder's List
Subject: Re: [simpits-tech] Odd control issue with XP...
My first guess would be a bad Plasma (sad!!!!), but I will say I've had some weird issues with Windows and joystick device calibration back before I switched to Linux.
One thing I can think of: with a traditional 100k pot, for instance, don't you usually get *some* voltage at the low end, since it's just a big resistor and not actually opening or grounding the circuit? Theoretically it still shouldn't act the way it's acting for you, but this *is* Windows we're talking about, maybe the unusually low voltage reading from the Hall is confusing it. :P
I would plug it into another PC and see what you get, or boot your current PC into a Linux boot CD and see if it will calibrate in Linux. Linux seems to be a little more tolerant of non-conventional joystick-style controls than Windows. Oh, and try different jumper settings on the Plasma...you can change the filtering level, as well as the resolution if I remember correctly (my Plasma V2 manual is not on this PC).
Matt
---- geneb <geneb at deltasoft.com> wrote:
> I'm spending some time tying up the lose ends on the 109F/X controls -
> I haven't done much with it since I replaced the pots with my diy hall
> effect sensors.
>
> The silly things won't calibrate under Windows XP and my Plasma MM2.
>
> I've tested the devices themselves and they range from 0..5V as you go
> from one extreme to the other - it's about 180 degrees of usable range
> - I'm only using about the middle 90 or so. (45 each way)
>
> When it calibration mode on XP, I view the raw data to watch for spikes.
> I don't have a spiking issue, but it appears I've got weird WRAP issue.
>
> With the hall effect sensor at a know position (centered @ 2.5V), the
> joystick calibration window reads about 960 or so. I would expect it
> to read about 500-512. When I move the control one direction, it
> quickly hits 1023 and wraps back to zero. It will do this at least
> twice if not three times before I hit the end of the travel. It does
> the same thing going the other way.
>
> Any suggestions or has my Plasma MM2 packed it in?
>
> Thanks folks!
>
> g.
>
>
> --
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