STM32N655 + TouchGFX: Application Hangs When Touching a Button Widget
Hi,
I am using an STM32N655X0H3Q interfaced with an NHD-7.0-800480EF-ASXN#-CTP display that uses the FT5426G capacitive touch controller. I have created a TouchGFX screen containing a single button widget. No interactions are currently assigned to the button (I had previously tested it with a screen-change interaction, but the behaviour remained the same, so I removed all interactions and am now testing with only the button widget present on the screen).
The touch controller appears to work correctly otherwise. I can continuously poll touch events inside STM32TouchController::sampleTouch() and successfully print the touch coordinates and number of touch points when touching any area of the screen outside the button.
However, as soon as I touch the button widget, the application hangs. The button disappears and the display turns into a plain screen. At the same time, the continuous polling inside STM32TouchController::sampleTouch() stops completely, indicating that TouchGFX is no longer calling the touch sampling routine.
What could cause TouchGFX to stop polling sampleTouch() and freeze only when a button widget is touched?