Crashes with AXS15231 touch driver

[ellesborough]

I am using lvgl_micropython with a Waveshare AXS15231 based ESP32 board (actually using @straga SPIBusFast PR) and have the display working, but when I use the AXS15231 touch driver, Micropython crashes once it gets touch events going to LVGL display objects.

If I move my finger over an empty part of the screen it is fine.

Using xs15231.AXS15231(touch_i2c, touch_cal=cal, debug=True) I can see the correct coordinates and press/release state.

But once there is a button or slider object on the screen and I touch them, after a second or two, I get a ConnectionError: EOF from Thonny.

I am using import task_handler; th = task_handler.TaskHandler() and the main program sits in time.sleep after drawing and while the interaction is going on.

I also tried writing my own simple I2C touch driver, which again gets the coordinates and touch state fine, but also crashes the system in the same way.

So it looks like it is related to LVGL's handling of the indev events.

I am not sure how I can debug further as to what is going wrong. Is there a way to get more debug information, warning, error messages from the native code?

[romamails]

I have the same problem with FastSPI.
FastSPI is not working correctly.
I create a button or any widget. When I press it, ESP32 crashes.

Only the default_SPI works normally(without 90rotation). branch v. feature/spi_bus_fast

[ellesborough]

@straga are you able to reproduce this issue on your board?

[straga]

@ellesborough I am use taks_handler only for test with slider and slider works.
Need a test with buttons too.
For my project I am use asyncio handler.

[ellesborough]

I tried using just

while True:
  time.sleep_ms(10)
  lv.tick_inc(10)
  lv.task_handler()

not sure of any limitations of this approach, but it seems to be stable with a button and a slider.

[kdschlosser]

the limitation is it should not be done in the main thread because it will block other things from taking place, namely scheduled tasks.

If you want to do that in the main thread you need to add lcd_bus._pump_main_thread() somewhere in that loop.