TouchGFX touch coordinate mismatch on STM32H7B3 hardware

[vijayajangam]

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.

[Osman SOYKURT]

Hello ​@vijayajangam ,

Which version of TouchGFX do you use? Which version of the firmware do you use (STM32Cube_FW_H7_VX.XX.X)?
Could you share what you do in your sampleTouch() function?