How to enable Jlink for custom board for nRF52832 DK

[Reshmi Marimganti]

I am using nRF52832 DK. I have connected our custom board using Debug out and loading code is successful for custom board. I loaded radio_test code. Now I want to test the radio parameters. For that any settings required on the DK board to enable Jlink for custom board?????? In my system Jlink isi detected in com ports, but I am not getting Radio test in terminal. Please provide any settings required to enable Jlink for custom board.

Thanks in Advance.

[FormerMember]

The problem may be that the UART pins on the external board are not connected to anything. The debugger pins does only consist of SWDCLK, SWDIO, GND and VDD.

Update 15.0316: The image below shows use the nRF52 DK (board 1) to

1. program a PCB that is not connected to a debugger (board 2)
2. print UART data from board 2 on the PC connected to board 1. The UART cables are connected to the defined UART pins on Board 1 and Board 2, respectively.

[Reshmi Marimganti]

yeah, those pins I've already connected. And code loading is working. But I've not connected SWO. Is that pin too required to be connected?

[FormerMember]

Could you upload a picture with how the UART is connected? Could you also use a logic analyzer to check that there are signals on the UART pins?

[FormerMember]

By "SWO" do you mean SWDIO? After programming, and when not debugging, I wouldn't think SWDIO has to be connected.

[Reshmi Marimganti]

Yeah, I tested without custom board, and its working. i am getting radio test in terminal. But when I connect custom board also, debug is working only for DK, not for custom board. When I connect custom board to DK using P19 connector and power ON custom board. Code loading is working for custom board and debug is not working for custom board.

SWO is not SWDIO, see pin 6 in P19 of DK. SWDIO is always connected and still debug is not working.

[FormerMember]

When I test it here, debugging works with the "external" board.

• Could you upload a picture with how the UART is connected? Could you also use a logic analyzer to check that there are signals on the UART pins?
• Could you upload schematic and layout? If you don't want to upload the schematic and layout here, you can open a new support case, refer to this thread, and address it to me.