How to config Zephyr if want to output debug message through USB port on nrf52840 dongle

[Zhongsan]

Hi, 

I want to output debug message(printk) through USB port on nrf52840 dongle. how to config it in zephyr, I have read the HelloWorld project code, but got nothing,

thanks

[Håkon Alseth]

Hi,

 

Here's an example that sets up usb cdc acm:

https://github.com/nrfconnect/sdk-zephyr/tree/v2.7.99-ncs1-1/samples/subsys/usb/cdc_acm

 

You can add these lines to the overlay to use that backend for the console:

https://github.com/nrfconnect/sdk-zephyr/blob/v2.7.99-ncs1-1/samples/subsys/usb/console/app.overlay#L7-L11

Or you can try the console sample, which does this:

https://github.com/nrfconnect/sdk-zephyr/tree/v2.7.99-ncs1-1/samples/subsys/usb/console

 

Kind regards,

Håkon

[Zhongsan]

Hi,

thanks for your update,

BR