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

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

Einarh — Tue, 18 Jan 2022 12:24:27 GMT

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

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

saeed mahvis — Tue, 18 Jan 2022 10:32:32 GMT

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

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

Einarh — Tue, 18 Jan 2022 10:23:18 GMT

Is there a &led4 node in your devicetree?

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

-Einar

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

saeed mahvis — Tue, 18 Jan 2022 06:22:50 GMT

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.

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

Einarh — Mon, 17 Jan 2022 10:28:09 GMT

Hello!

How to use devicetree overlays is detailed here:

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

Best regards,

Einar