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Microsoft Windows CE

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Suppress touch screen calibration

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haka

31 Posts

Posted - 30 May 2006 : 07:42:01

I have problem a running BitsyXb on a device without touchscreen.
How do I suppress the touch screen calibration ?
I have try this in ADSLOAD.REG:
[HKEY_LOCAL_MACHINE\Drivers\TOUCH]
"NoTouchScreen"=dword:1

It works on Bitsy Plus and BitsyX, but not on BitsyXb

HBPayne

45 Posts

Posted - 30 May 2006 : 14:58:25

I'm not familiar with the key you're using but you could put in a bogus value for the calibration into ADSLOAD.REG such as:

  [HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\TOUCH]
    "CalibrationData"="479,486 235,722 721,719 724,251 234,251"

And then it will ignore the calibration. This is for Bitsy and BitsyX.

akidder

1519 Posts

Posted - 31 May 2006 : 10:23:52

Dummy Calibration Values

Dummy calibration values are a great way to bypass the calibration screen. The current driver reads five pairs of X,Y coordinates, which correspond to the touch panel controller readings for the five calibration points. (Update: Note that the driver will still generate interrupts and screen presses if a touch panel is present.)

Disabling the Driver

I believe that you can also disable the driver by providing an invalid name for the driver. (Update: May generate a data abort in GWES; expected behavior unknown.) E.g.:

  [HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\TOUCH]
    "DriverName"="dont_load.dll"

Summary

Any one of the following methods will work to disable the touch panel driver:

Registry key (when BSP supports it )

Use dummy calibration values

Give incorrect name for touch panel driver

Edited by akidder 31-may-2006: Add updates based on developer feedback.

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