Touchgfx can't detect any touch

[DVale]

Hello,

I started the development of a touchgfx application from a F4 evaluation board but I'm using a different display (720x720) and a different touch controller.

The video output looks good, the interactions that doesn't involve any touch action work good, but it can't detect any touch.

I forced the touchDetected field to 1 to debug this issue, I cannot understand how the touchgfx core can ignore the "touch" when x, y and the boolean returned are correct.

Is there a touch register? Is there any way to debug how the output of the sampleTouch function is used?

 Here I post the code:

bool STM32F4TouchController::sampleTouch(int32_t& x, int32_t& y)

{

 /* USER CODE BEGIN F4TouchController_sampleTouch */

  TS_StateTypeDef state;

  BSP_TS_GetState(&state);

  if (state.TouchDetected)

  {

    x = (int32_t)state.X;

    y = (int32_t)state.Y;

    return true;

  }

  return false;

 /* USER CODE END F4TouchController_sampleTouch */   

}

Thank you

[Martin KJELDSEN]

Hi @DVale​,

I couldn't find this because i only monitor the TouchGFX subforum. I'll repost what i wrote in the other one and added "TouchGFX" to your tag list in this one.

TouchGFX won't ignore your touch. I'm not sure what's going on because i don't have your project or board.

TouchGFX at its core does not really care about touch outside of offering a handler that you can implement and use your own drivers (ST-drivers in this case, since its an eval board) to return x,y and whether or not the touch registers indicate a touch. We have to look to the project and version of drivers, etc. The touch registers are read by the driver through a protocol like I2C. You can't inspect it directly.

Can you please try to create your project through the designer - We should have application templates for all F4 based ST boards (that work). And which F4 board is this? You should be able to make some comparisons for your project setup

/Martin

[DVale]

Probably I must avoid to send too much touch to touchgfx engine.

I added a piece of code that check the interrupt sent by the touch controller and now the touch are detected. Basically now I'm using state.TouchDetected correctly and the inferface works fine.

Thanks!

[Martin KJELDSEN]

Okay, that sounds great! I'm not completely sure why it works now but glad it does! 🙂

/Martin