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TouchGFX touch coordinate mismatch on STM32H7B3 hardware

vijayajangam
Associate III

Hello ST Community,

I am using STM32H7B3 + TouchGFX + 7-inch 800×480 TFT with GT911/GT9111 touch controller.

In the TouchGFX PC simulator, all buttons and toggle switches work correctly. But after flashing to hardware:

  • TFT display is working properly.
  • Touch is detected.
  • Actual touch point and detected touch point are different.
  • Touch is detected on the same horizontal line, but the vertical coordinate is shifted/wrong.

I want to know the correct solution for touch coordinate mapping/calibration. Should this correction be done.

 

Please guide me on the correct method for touch calibration and hardware control/status display in TouchGFX.

Thank you.

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