Okkkk, I have read the code and tried to digest it. Few questions:
1) Can you please explain how is "Start reading average pressure value" routine is working. Upto now I have only encountered putting 5v on y+ or x+ and corresponding y- or x- to be 0v. What is 5v @ y+ and 0v and x- doing?
2) Any ideas on how to change the circuit to add an interrupt on RA2 when touchscreen is pressed, unlike monitoring it continuesly?
3) Please explain the calibrate routine, this is the hardest bit of the code which I am failing to understand.
Many Thanks