DEBUG OUT Connector (P19) and VCOM0

[Bret Foreman]

I've got an nRF52832 DK board. When I connect it to the USB bus, I see the following in the nRF Connect app:

I can run the hello_world app and see it output "Hello World! nrf52dk_nrf52832" on COM4 connected to Tera Term.

Next, I connect my new target board to P19. Then I see this:

The new target is based on the 52810 so all looks as expected.

Then I used the "Create a new board" wizard in nRF Connect to make a build configuration for the 52810 SoC.  And I rebuild the hello_world app and flash it to the new target.

But nothing comes out of VCOM4.

I suspect this is because the VCOM4 is still pointed at the 52832 on the DK board. Is there a way to change the jumpers on the DK or the build configuration to allow VCOM4 to work with P19?

Regards,

Bret

[Håkon Alseth]

Hi,

 

When programming an external board, the VCOM's are still routed to the nRF DK target.

You will have to attach a USB-UART bridge on your custom board to get this functionality.

 

Kind regards,

Håkon

[Bret Foreman]

I figured that might be the case. Is there a Zephyr tutorial for re-routing printk to the UART in hello_world?

[Håkon Alseth]

Hi.

printk is directed to uart by default.

Do you mean change the physical pins that the uart0 uses?

 

Kind regards,

Håkon

[Bret Foreman]

No, you're right. The hello world text comes out on both the VCOM and the physical UART as a default. Please close this ticket.