nrfgo studio doesn't see my custom board

[Jorge]

Hello all,

I am trying to program my custom board using the debug out from the nrf51-DK. I connect all the needed pins and on the nrfgo select the Segger but when I do this my nrf51-DK resets and it doesn't show me nothing.

I already reinstalled the nrfgo studio 1.21.2, also the JLink controlers. I am using a windows 10 64 bit, and already tried to check the registry which I saw in this thread and the path is correct.

Also tried to use the software for the command window the nrfjprog and it says that he cannot detect the board.

Also tried to power on the DK on bootloader mode and flash the JLink to it, but it also didn't help.

If I disconnect my custom board I can detect the nrf51422 inside.

Do I need to connect more than the VTG, SWDIO, SWDCLK and GNDs?

EDIT: I have tested using the P19 and P20 for the debug out and had the same results.

I think my problem is the same as found on this question.

[Jay Tyzzer]

For the nRF5x-DK to program the target board the target board must have a voltage of 3.0 to 3.3 volts. The VTG reference line from the target aboard to the programmer tells the nRF5x-DK that it has a external board connected to it and to ignore the on board nRF5x device and it also determines wither or not it is between 3.0vdc and 3.3vdc.

Side Note: If you have a device plugged into P20 and then another put into P19, P19 takes precedence.

[Jorge]

I only have connected to one of them, but I already tried to connect on both sides (not at the same time).

It detects the voltage, and I can see that I have the voltage there, but then doesn't detect the custom board.