Problems with touch panel calibration

jovic · Mar 10th 2006

Hi all,

I have serious problems to calibrate a touch panel, that is connected to a netDCU8. It is a 5,7'' 4-wire-panel. I can start the calibration software and it registers my touches, because the cross is moving. But the calibration process never stops, although I have repeated it many times. When I try to hit gui elements without calibration, I can see, that the hits will be registered quite accurate on the left side of the screen. The more I move to the right, the worse it is getting.

I have already replaced the touch panel - the same story.

So where is the mistake?

1. Do I have to configure the touch panel in the registry
2. Is it possible, that I have misconnected the panel to the NetDCU8, especially when you keep the behaviour in mind, as derscribed above?

Thanks in advance,
Mate Jovic

fs-support_HF · Mar 10th 2006

Hello,

I think you have mixed the X and Y signals. Normally you must not make additional registry settings for this size (5,7").
To check your connection, you can set the registry value Debug to 0x10 under registry key [HKLM\hardware\devicemap\touch].

Code

reg open \Hardware\Devicemap\Touch
reg set val Debug dword 16
reg save
reboot

Hope this helps

Holger

oscar · Apr 24th 2006

I read your answer to jovic with the touch panel calibration problem.
I have a 6.4" 4-wire resistive touch and I have the same problem that t jovic. I have tried all wire combinations (X and Y) and we had the same results. Any idea ?

Thanks in advance,

Oscar

Quote from "froelich"

Hello,

I think you have mixed the X and Y signals. Normally you must not make additional registry settings for this size (5,7").
To check your connection, you can set the registry value Debug to 0x10 under registry key [HKLM\hardware\devicemap\touch].

Code

reg open \Hardware\Devicemap\Touch

reg set val Debug dword 16

reg save

reboot

Hope this helps

Holger

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fs-support_DB · Apr 24th 2006

Sometimes the backlight inverter adds noise to the analog touch signals. So the touchpanel driver never gets a stable signal. So no calibration is possible.
Try the calibration with the inverter disabled when pressing the touchscreen or put the touchpanel away from the display (away from inverter and lamp).

oscar · Apr 25th 2006

Now, we are testing NetDCU8, but before we use the same LCD and touch we another board and it works fine. I think that is not a noise problem.

Oscar.

Quote from "Baeder"

Sometimes the backlight inverter adds noise to the analog touch signals. So the touchpanel driver never gets a stable signal. So no calibration is possible.
Try the calibration with the inverter disabled when pressing the touchscreen or put the touchpanel away from the display (away from inverter and lamp).

fs-support_HF · Apr 25th 2006

Hello,
are you shure that you have the same problems ?
What happens if you calibrate the touch screen ?
Do you see the arrows ?
Can you finish calibration with success ?
Do you save your calibration settings before rebooting the device ?

You see, a lot of questions. Please give us more input.
Regards
Holger

oscar · Apr 25th 2006

You have reason. I have shorted the touch cables, and I put this cables away from inverter. It works better.

Thanks you.

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