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STM32U535 + ILI9341 TouchGFX Performance

kumaichi
Associate III

I'm using TouchGFX with a custom board that contains a STM32U535 and ILI9341 display.  The display also has the XPT2046 touch controller.  The issue I'm running into, which ControllerTech pointed out in his video, the touch/refresh is kind of spotty at best.  I'm currently just using the TouchGFX gauge and two buttons.  Planning for the possibility of performance issues, I put a W25Q128JV (SPI mode) on the board.  I haven't got that working yet.  Prior to going down that road, will the external flash make the touch/display more performant?  Is having the flash chip in SPI mode be a factor as well, would changing it to QuadSPI be a better solution?  Or is this display never going to be performant with TouchGFX?

Thanks for any guidance.

Kindest regards.

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