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Forums BUGmodules LCD Pressure Sesitivity

Subscribe to LCD Pressure Sesitivity  2 posts, 2 voices

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  • tom_joynt
  • aroman

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May 22, 2008 10:41am
Img_missing_medium tom_joynt 1 post

On the hardware specs for the LCD screen, it says that there is:
Non-Glare resistive touch screen with touch pressure sensitivity (12-bit resolution)
I was wondering if there is any way currently to use that sensitivity. There is no javadoc or API documentation that I am aware of, next to the Java AWT implementation.

Thanks!
May 29, 2008 1:58pm
Img_missing_medium aroman 21 posts

Hi Tom,

I’ve posted an application on BUGnet which describes how to obtain the pressure value. The name of the app is BUGLCD_Pressure. Please follow the instructions in the description.

To summarize, the driver does some normalization of the data so that both QT and X would recognize when the user places and removes the stylus/finger from the screen. Therefore, the data is not what one would expect in an ideal world. There are multiple factors that come into play when implementing the driver for the touch screen. Most of the linux touch screen drivers perform some sort of normalization and the data is not guaranteed to be a one to one representation of the pressure.

Regards,
Angel

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