I am having issue with touch as well. When using URTOUCH library or older UTOUCH library, output to com windows shows -1 for both x and y coordinatesl. When I use the Touch_AS_example, the serial output looks fine and touch screen appears to be working perfectly fine.
The lcd I have is TFT_320QVT_9341. The chip on the back is a XPT2046 driver for touch. i am using a MEGA 2560 to control it.
Any help would be appreciated.