NRF52 DK debug port not working

[cory123]

I have an NRF52 DK and a J-Link mini debugger. I'm trying to connect J-Link debugger to the NRF52 via the debug jumper port. I'm using a standard 10 pin SWD JTAG cable. I don't want to use the onboard debugger chip on the NRF52 DK because I testing the J-Link mini debugger. When I run J-link commander using the JTAG (not SWD) interface I get this message:

"Could not measure total IR len. TDO is constant high"

When I use the SWD interface I get ....

InitTarget() start

InitTarget() end

InitTarget() start

InitTarget() end

InitTarget() start

InitTarget() end

InitTarget() start

InitTarget() end

Cannot connect to target.

Can you please help me with connect to the NRF52 directly with my J-Link mini connected to the debugger jumper port?

[Håkon Alseth]

Hi,

When I run J-link commander using the JTAG (not SWD) interface I get this message:

nRF5 devices support SWD, not JTAG. Could you try to use SWD instead?

 

Kind regards,

Håkon