topic Re: FPS Performance Issue in i.MX RT Crossover MCUs

FPS Performance Issue

Bo_Kang — Fri, 28 Mar 2025 05:19:33 GMT

Hi,

Currently I’m devloping GUI software with LVGL V8.3.5 on NXP MIMXRT1062, I’m facing an issue regarding fps performance. (the Screen Display I’m using is a 10"inch 800x480 resolution, RGB565)
I just input some basic button, icons, and a large static png(, about 400x400, already converted into .c file using LVGL offical image converter), by enable LV_USE_PERF_MONITOR, I found the FPS is drop to only about 7, and CPU usage is going up to around 43%(I set refresh period as 40ms, so FPS should be 25. and I configure disp_drv.full_refresh = 1)
Does anyone know where can I found some demo example with LVGL V8.x of which configuring disp_drv.full_refresh = 0, and NXP PXP enabled?

Re: FPS Performance Issue

EdwinHz — Fri, 28 Mar 2025 20:23:53 GMT

Hi @Bo_Kang,

Please look at the following page for performance optimization tips for LVGL: GUIGUIDERUG_1.9.0: GUI Guider v1.9.0 User Guide | NXP Semiconductors.

Unfortunately, as mentioned on this post, the i.MX RT's MIPI does not support partial refresh: Solved: Re: LVGL the screen will flicker when exiting full_refresh mode - NXP Community.

BR,
Edwin.

Re: FPS Performance Issue

Bo_Kang — Mon, 31 Mar 2025 04:22:39 GMT

Hi Edwin, thanks for the response.

I use RGB LCD interface, not MIPI