Attila Kiss

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Hi! I assume you are using a single core cpu,with RTOS enabled? Could you give me some general details so i could take a deeper look into it? What is...

Does the delay work as intended? Have you set up lvgl prior to calling the handler? Are the timers running? Does this task yield after done? These would be my...

Does the timer handler get even called? So if I get it right, you are using RTOS and in the infinite loop you are handling the LVGL timer?

Apologies for not responding earlier. Have you verified all execution? Do you have semaphores inside the flush callback which are not set properly in ISRs or elsewhere? If you could...

Please source the data as well, for 1:1 reproduction. Thank you in advance.

I cannot reproduce your issue, as everything works perfectly on my end. Have you modified the makefile or the sources to compile the image file itself?

You could disable the ARGB8888 part, as color depth is 16 anyways. I doubt you need 32 megs of memory for rendering, tho the image is quite large for sure....