XPT2046 touchscreen problem

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1

Hello,

I bought this touchscreen:2.8inch Touch LCD Shield for Arduino
I'm using interrupt to detect touch of the screen and it works fine. Problem occurs when I try to read X, Y values using library function that was provided with the screen. This line:
Xpt.xpt2046_write_byte(0x90); generates the same interrupt and the loop goes on and on.

The function above is just SPI.transfer(). Thank you for answers.

2

There is an XPT2046 library which is available through the Arduino IDE. Maybe try that and see if it functions better. In the library folder, you'll find examples which detect a touch and indicate the coordinates of the touched point.