Hi,
I'm currently programming a custom board using a nRF52832 (using this wiring). Everything was working great but I tried to play with SAADC and maybe did a wrong configuration and/or added too much debug log. Since a previous code upload, I'm unable to connect to my board again.
I had another board with the same behavior (same code uploaded to confirm this was the code), but somehow I found a way to unlock it, I was able to upload a basic blinky example while removing the GND DETECT and switch from VDD to VDD nRF. I don't know if it related though.
But I still have one board completely locked, how to unlock it ?
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> JLinkExe -device NRF52 -if SWD -speed 1518 -autoconnect 1
SEGGER J-Link Commander V6.22a (Compiled Nov 28 2017 17:57:01)
DLL version V6.22a, compiled Nov 28 2017 17:56:49
Connecting to J-Link via USB...O.K.
Firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Jul 24 2017 17:30:12
Hardware version: V1.00
S/N: 682621274
VTref = 3.300V
Device "NRF52" selected.
Connecting to target via SWD
Cannot connect to target.
J-Link>
Thanks