How to use the touch functionality on the JC3248W535EN board...

[korova99]

I am trying to implement touch functionality on the JC3248W535EN board using the Arduino GFX library.

I have successfully drawn text and shapes on the screen, but I have been unable to implement the touch functionality.

I cannot find information about the touch driver chipset used in this board,
nor can I confirm whether it uses I2C or another method, and I don't know the address.

Has anyone been successful with this?

[Shadowtrance]

The touch driver and display driver are one and the same. AXS15231B
Uses i2c and works pretty well with bb_captouch once you disable this ifdef endif https://github.com/bitbank2/bb_captouch/blob/main/src/bb_captouch.cpp#L169 and L178 or #define FUTURE (that didn't work when i tried for some reason.

BBCapTouch bbct;
#define TOUCH_SDA 4
#define TOUCH_SCL 8
#define TOUCH_INT 3
#define TOUCH_RST -1

//in setup
bbct.init(TOUCH_SDA, TOUCH_SCL, TOUCH_RST, TOUCH_INT);
bbct.setOrientation(90, gfx->height(), gfx->width()); //rotation, width, height.. setting i have there is rotated to landscape.

Then a simple example of using it would be.

//lvgl touchpad read example
void my_touchpad_read(lv_indev_drv_t *indev_drv, lv_indev_data_t *data)
{
  TOUCHINFO ti;
  bool touched = bbct.getSamples(&ti);

  if (touched && ti.count > 0)
  {
    data->state = LV_INDEV_STATE_PRESSED;
    data->point.x = ti.x[0];
    data->point.y = ti.y[0];
  }
  else
  {
    data->state = LV_INDEV_STATE_RELEASED;
  }
}

And that's about it.

[korova99]

Thank you for your kind and quick response.

I successfully applied the information you provided to detect touch actions.

I truly appreciate it. Wishing you good luck and all the best!