Hi again.
I'm using nRF52 DK board in Ubuntu. I can flash the device with the blinky example (I haven't yet tried the softdevice tough), but I cannot really get any traces out of the SW. I added simple printf to blinky main loop to keep things simple.
JLinkExe -device nrf52 -if swd -speed 4000
SEGGER J-Link Commander V5.10u (Compiled Mar 17 2016 19:06:22) DLL version V5.10u, compiled Mar 17 2016 19:06:19
Connecting to J-Link via USB...O.K. Firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Mar 15 2016 18:03:17 Hardware version: V1.00 S/N: 682343799 VTref = 3.300V
Type "connect" to establish a target connection, '?' for help J-Link>connect Device "NRF52" selected.
if I run tstart I get:
Trace could not be started, no trace clock.
What is still missing here?