There will be some pixels remaining when refreshing the screen


When I click on an object to refresh the screen, there will be some pixels from the last time on the screen.

What MCU/Processor/Board and compiler are you using?

arm Cortex A53

What LVGL version are you using?


What do you want to achieve?

Make the screen refresh normally.

Screenshot and/or video

If possible, add screenshots and/or videos about the current state.

When I click again to refresh the screen, it disappears.

Is this a problem with the screen refresh rate? Or it was interrupted by other interrupts before the refresh was completed(This is my guess, I don’t know how to locate this problem)

I’ve seen these types of artifacts appear when the CPU cache is enabled but not managed properly; are you doing anything relating to that?

1 Like

Yeah, you are right!
I did not clean the cache.Now it’s normal. Thanks for your support.