nrfgo studio doesn't see my custom board

RE: nrfgo studio doesn't see my custom board

Jorge — Fri, 28 Apr 2017 07:38:00 GMT

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.

RE: nrfgo studio doesn't see my custom board

Jorge — Fri, 28 Apr 2017 07:36:38 GMT

I am using the nrf51-DK as a J-tag between the computer and the custom board. I will test the commander and see if it shows up some more information.

RE: nrfgo studio doesn't see my custom board

Jorge — Fri, 28 Apr 2017 07:34:23 GMT

Yes, I am powering the board via external supply. And it detects the voltage, but not the nrf on the custom board.

RE: nrfgo studio doesn't see my custom board

Jay Tyzzer — Thu, 27 Apr 2017 21:43:20 GMT

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.

RE: nrfgo studio doesn't see my custom board

Steven Grunza — Thu, 27 Apr 2017 19:16:50 GMT

Under the <Jlink-v6.xx> selection from the Start menu (or whatever the Windows 10 equivalent is) there should be an option to run SEGGER's J-Link Commander. Once the Commander connects to the J-Link pod you should be able to get some more diagnostic info from the Commander about what it is seeing on the pod. One possibility is that it has defaulted to using a JTAG connection instead of SWD.

Which J-Link pod do you have? The J-Link lite only works at 3.3V - we got burned with that one on a low Voltage custom board.

RE: nrfgo studio doesn't see my custom board

Wojtek — Thu, 27 Apr 2017 15:52:05 GMT

Are you powering target board? You have to.

RE: nrfgo studio doesn't see my custom board

Jorge — Thu, 27 Apr 2017 11:53:47 GMT

Yes, all the commands using the nrfjprog say "not able to detect the board". I know that he is going to the correct nrf but it resets my nrf-DK, using the nrfgo or the nrfjprog tool. It is the same result on both. I am powering my board separately, I just connect the VTG to detect the VBAT from my custom board.

RE: nrfgo studio doesn't see my custom board

butch — Thu, 27 Apr 2017 11:37:36 GMT

I would start with making nrfjprog able to recognize and flash the board. Have you tried "nrfjprog --recover --family NRF51"? (That clears all flash and unlocks the lock on the flash.) Also, have you tried powering your board separately? (That is what I do with the NRF52DK.) There are many more posts in the forum about the proper way to connect and power your custom board. You say "GNDs" plural : I recall a post saying that only GND_DETECT is needed (but it has worked for me with GND and GND_DETECT together.)