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Help with TSC2046 Touch controller

Ing. Bruno Palacios
Prodigy 170 points
Other Parts Discussed in Thread: TSC2046

Hello,

I recently bought this Display: http://imall.iteadstudio.com/display/tft-lcm/im120419005.html 

It includes an TSC2046 for controlling the Touch Screen. The thing is I can read the X and Y values in 12 bit mode without problems, but I cant find anywhere how can I convert those values to X-Y position. Even in the Datasheet, I have searched a lot and nothing.

Can anyone help me with this? I know that probably it is explained in the datasheet and the problem is I do not understand the operation of the resistive touch screens, but please if anyone can help me I will be thankful.

Best regads,

Bruno

  • 0
    TI__Guru 52115 points

    Hi Bruno,

    I assume that the X-Y positions you are talking about the x & y coordinates in the LCD, right?  If yes, calibration is required.  Take a look at the application note  below. In addition, tslib is most commonly used open source calibration library.

    http://www.ti.com/lit/an/slyt277/slyt277.pdf

    Andy