esp32-4848S040CIY3 flickering screen will performing update

[d4rkdpg]

Im using esp32-4848S040CIY3, whilst performing an update the screen is flickering. Im using LVGL and calling a function to do OTA. I also get a slight flicker when connecting to wifi, or it seems so, not sure whats causing this.

Thanks

[rzeldent]

Think interrupts are disabled during wifi, or running on the same core as wifi?

[d4rkdpg]

im not pinning connect to wifitask to a core, the update is running on core0 as a task that gets deleted when update found.

[d4rkdpg]

tired a few things nothing seems to work, any pointers.

[rzeldent]

Tweaking the PCLK might also help reducing the flicker..

[d4rkdpg]

  "'-D ST7701_PANEL_CONFIG_TIMINGS_PCLK_HZ=(12.5*1000000)'",  here? what should I reduce it to.

[rzeldent]

Any progress?

[d4rkdpg]

didnt get anywhere still flickering....

[rzeldent]

The screen is refreshed using I2S. I suspect wifi influences the timing and causes flickering...

[d4rkdpg]

ok thanks, anything i can do i tried a few things still the same.

[xperiments]

I have found the same problem

Here is explained and solved but needs changes in ESP IDF

https://forum.lvgl.io/t/display-glitching-while-connecting-to-wifi-esp32s3-8048s043/12075/33

@rzeldent Do you think we can integrate this? checked for bounce_buffer_size_bytes in current version but I imagine the used IDF version is 4.4