When increasing resolution from 300x400 towards 320x480 (ILI9488) some objects are not being drawn. In esp-iot-solution ‘lvgl_example’ chart is being displayed without upper menu with white instead of black background.
ESP32DOWDQ6 (DEVKIT1) with ILI9488 display (ER-TFTM035-6 board)
esp-idf v3.2.2 GCC 5.2.0 Toolchain version: crosstool-ng-1.22.0-80-g6c4433a Linux x64
I am using LVGL v.5.3 because this environment cannot compile LVGL v.6.0
So far I have been trying to increase - decrease: buffer size, auto flash interval, dma size, nothing helped except when decreasing SPI clock to 1MHz or lower system draws everything in full resolution but it is unusable at that speed (same situation is with dma turned off).
I have rewritten ILI9341 drivers code: initialization to suit ILI9488 and added color conversion from 16 bit color to 18 bit color (RGB666) and everything works fine on lower resolutions.
Any help is highly appreciated.