Change screen while stuck in long running event from keypress

How-to
1

Using lvgl v9.1 with an embedded (400M ARM) system, the FreeRTOS thread for the LCD worker is what is triggering the menu clicks etc .

i have a situation now where I can get stuck in a long running process ( 10s of seconds potentially ) but need to change the screen to put up a message before that starts within the event and ideally make it dynamic as a progress update and then hide it all at the end

I know you’ll say shift that lot out into another thread but that doesn’t easily fit with how the rest of it works at present but is there a way to get the screen to refresh whilst deep in the indev event handling ?

2

You really shouldn’t be having code that can take a long time to execute in an LVGL event. It would be better to run that code in a FreeRTOS task allowing LVGL to continue about it’s business.

To directly answer your question…

Change the screen and then call lv_refr_now() to push the new screen to the display.