touch screen not working

[mazur888]

PCA9557 file seems not working. Everything compiles and uploads ok, but I lost touch screen functionality on demos. it was fine on factory demo before I uploaded lvgl demo code from lesson 5.

[giuging]

Same exact problem. With all the V3.0 example code the touch of the 7.0 panel does not work
it seems that the problem comes from the PCA9557. The videos of the lessons are made without the use of this
PCA9557 which is not mounted on the board and therefore not even present in the software.
The manufacturer itself should give us some suggestions.

[mazur888]

I managed to get it working on platformio with GT911 driver. Arduino doesn't work with touch at all, tried many liraries with no avail. Check elecrow wiki website for that platformio code.