adding lvgl to thing53 breaks building

RE: adding lvgl to thing53 breaks building

runsiv — Thu, 24 Apr 2025 05:53:46 GMT

Good that you have it working. Displays are one of those where you need to use chosen property, you can read more about it here

Regards

Runar

RE: adding lvgl to thing53 breaks building

ctyerman — Wed, 23 Apr 2025 13:44:04 GMT

i think i get the problem now the is looking for specific Device tree node values based of chosen node, and the chosen node requirement was not obvious.

I was trying to get something to build successfully by eliminating extraneous code.

I now have tried using the lvgl sample (samples/subsys/display/lvgl)

and the following overlay(based on the ssd1306 shield (boards/shields/ssd1306) which says is compatible)

&i2c1 {
	ssd1306_64_48: ssd1306fb@3d {
		compatible = "solomon,ssd1306fb";
		reg = <0x3d>;
        segment-offset = < 31 >;
        page-offset = < 0 >;
        display-offset = < 0 >;
        multiplex-ratio = < 0 >;
        prechargep = < 0x22 >;
        height = < 64 >;
        width = < 48 >;
        inversion-on;
        
	};
};


/ {
    chosen {
        zephyr,display = &ssd1306_64_48;
    };
};

which builds successfully but has the same error if chosen node removed

the requirement for a default display being defined in the device tree to build the lvgl module is interesting

thanks for the assistance

RE: adding lvgl to thing53 breaks building

runsiv — Wed, 23 Apr 2025 11:26:11 GMT

From the logs we need to look at your overlay to be able to debug further. Can you upload it here?

As you have written you started with a blank application, have you created an overlay? in general I would suggest to not start with a blank application, but rather a sample that is close to what you want to achieve and build on it.

Regards

Runar