Hi, I have a great problem with the Penirq to set interrupt on Arduino cause the value of penirq isn't stable....  when I turn on the display the value of Penirq pin is High "about 3,3v", afther than I touch the screen the value goes to Low 0v. finally when I lift my finger from the screen, the value doesn't return to High but starts to fluctuate and the setting to read the statement on arduino crash and goes in an infinite loop!!!

I need some helps, and If you have a bit of code for Arduino uno or arduino Mega to let's the Penirq work properly, please post it to me...