nRF SDK external device not detected

[nsugie]

I'm using nRF SDK and trying to write firmware to my prototype device. However, nRF SDK doesn't detect my prototype device. I checked the power supply to my prototype device, and looks okay.

[FormerMember]

Do you mean that it is not possible to program the chip on your custom board?

If that is the case, which error message do you get from nrfjprog if you run nrfjprog --recover -f nrf52 for instance?

Could you upload schematic, layout and and picture of the board? For the schematic and layout, only the programming part is needed.

[nsugie]

Kristin,

Thank you very much for your reply.

The problem is that my custom board is not detected by nRF SDK.

My custom board has own power supply. I thought, in this case, nRF SDK automatically detect my custom board. However, "nRF5x Programming" of nRFgo Studio doesn't become active.

I checked the pin no.1 of connector P19 on the nRF SDK, and I could see 3.3V there.

[FormerMember]

The programmer, is it correctly connected to the board? Is it connected to SWDIO, SWDCLK, VDD (reference), and GND?

[nsugie]

Here is the pin assign. No.1 VDD No.2 SWDIO No.3 GND No.4 SWCLK No.5 GND No.6 NC No.7 NC No.8 NC No.9 GND No.10 NC

This goes to P19 of nRF SDK board.

[FormerMember]

As I asked yesterday, which error code do you get from nrfjprog when you use nrfjprog from cmd?