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320*240 resistive touch screen calibration problem

Hi every one.

I have 320*240 LCD with resistive touch screen and touch screen controller of AD7843 ( All is together in one LCD from topway: KM2088S). I want to know what is the best way to calibrate the touch screen? when I push the touch screen a little bit it shows me a number, but when I push it harder it shows me a different number!! how can I solve it? Is it going to solve by calibration? I really appreciate if you guys can help me.

Regards

Arash

Parents
  • Hi and thanks for reply. Actually I found AD7873 which calculate the pressure also and we can use it to say if the pressure is below some value, just ignore it. But I want to know what can we do when we have ad7843. I mean let say I have AD7843 and i want to use it as a touch screen controller. But the pressure of the people is different for a amount of area ( not just one point). what can I do then? How can I solve this pressure issue by ad7843? how can we find out the number is correct and the number shows the right position?

    Regards

    Arash

Reply
  • Hi and thanks for reply. Actually I found AD7873 which calculate the pressure also and we can use it to say if the pressure is below some value, just ignore it. But I want to know what can we do when we have ad7843. I mean let say I have AD7843 and i want to use it as a touch screen controller. But the pressure of the people is different for a amount of area ( not just one point). what can I do then? How can I solve this pressure issue by ad7843? how can we find out the number is correct and the number shows the right position?

    Regards

    Arash

Children
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