Does anybody know how to use the XPT2046 pentouch pin to activete an ISR ? I noticed that pin generate a lot of spurious high to low transictions. I was expecting only one high to low level when one touch occurs. I saw many libraries and posts suggesting to use that pin for poolling method not for real hardware interrupt. Any help will be appreciated. Thanks
It sounds like a debounce problem to start with. Realize each bounce will give you an interrupt. You will probably need to do some external signal conditioning (debouncing) externally if you want to use an interrupt. Consider the pin behaves like a push button. This response is to help you get started in solving your problem, not solve it for you.
Good Luck & Have Fun!
Gil