You then need to write your own touch driver (there might be some code available online already) and modify the files STM32TouchController.cpp/hpp in the <project name>/TouchGFX/targer folder. You can use the TBS for the STM32H7B3dk available in TouchGFX Designer as source of inspiration: have a look at STM32TouchController.cpp/hpp and stm32h7b3i_discovery_ts.h in the <project name>/Drivers/BSP/STM32H7B3I-DK folder .
