How can I increase the number of aliases leds in NRF5340-DK via overlay file

[saeed mahvis]

Hi

I want to increase the number of leds in DTS file of peripheral-uart sample by using overlay file.

Is it possible to manipulate the aliases in DTS file by editing the overlay file? 

[Einarh]

Hello!

How to use devicetree overlays is detailed here:

https://docs.zephyrproject.org/latest/guides/dts/howtos.html#set-devicetree-overlays

Best regards,

Einar

[saeed mahvis]

Hi

I tried by adding the following code to overlay file:

&aliases {

               led4 = &led4;

};

By doing this the NRF connect software couldn't load NRF connect sdk project and a python error was issued. 

[Einarh]

Is there a &led4 node in your devicetree?

I believe the default leds on the nRF5340 DK would be labeled led0-3

-Einar

[saeed mahvis]

Hi

Actually this is my problem. I want to &led4 node to my device tree via overlay file. 

[Einarh]

Ok I understand.

You can not add an alias for a node that doesn't exist in the devicetree, so in order to make your led4 alias you will first have to define the &led4 node in your overlay file.

You can see what a led node should look like if you look up the already defined led nodes in the build/zephyr/zephyr.dts devicetree file in your project folder.

Basically you will have to define what gpio it uses and give it a reference label.

Please read the introduction to Zephyr devicetrees for more information about how the devicetree works.

Best regards,

Einar