nRF52-DK doesn't show up in Segger Embedded Studio

[Rutwij]

Hello, after getting my nRF52-DK I first tried to program it using Arduino IDE according to this guide. Everything worked perfectly as I was able to flash new firmware into it. The DK also does show up as a drive and I'm able to do drag-and-drop flashing.

Now I have decided to go deeper and use Segger Embedded Studio as my IDE but my problem is that the IDE doesn't recognize/connect to the J-link debugger. When I try "Traget->Connect J-Link" it says that "Cannot connect to J-Link via USB". I also installed the J-link software pack from here. J-link Commander also shows the same error "Connecting to J-Link via USB...FAILED: Cannot connect to J-Link via USB."

I've tried reflashing the debugger firmware using this guide but it still doesn't show up in Segger Studio. The JLink drive still shows up and I can also see "JLink CDC UART Port" in Device manager and the same port shows up in nRFgo Studio under nRF5x Bootloader. How can I solve this problem?

[Joakim Jakobsen]

Hi!

That sounds strange.

Could you tell me which version of SEGGER Embedded Studio you are using?

Cheers,
Joakim.

[Rutwij]

I'm using Segger Embedded Studio for ARM Release 3.34 Build 2017121400.34532

[Joakim Jakobsen]

Maybe you could take a look at this post, and see if any of the suggestions there might be helpful?

https://devzone.nordicsemi.com/f/nordic-q-a/19221/nrf52832-cannot-connect-to-j-link

If none of the suggestions works for you, be sure to let me know.

Best regards.

[Rutwij]

I have exactly the same problem as described in that thread and I tried everything. When I try to see if there are any debuggers connected to the PC I get nothing -

C:\Users\rutwi>nrfjprog -i

C:\Users\rutwi>

Though I haven't tried it on any other computer because right now I don't have access to one. I will let you know after testing that. 

[Rutwij]

At last it's working! I've tried installing everything from scratch on another work computer and I can flash and debug using SES. Thank you for your support!