nRF52832 (Thingy52) programming via nRF9160 DK

[DevCon:52]

Dear All;

I'm looking to flash a RIOT-OS image onto the Thingy52 via the J-LINK OB on the nRF9160 DK. I'm using Linux and both nrfjprog and JLinkExe detects the programmer, but can't connect to the target. Same result from nRF Connect Programmer.

Firmware: J-Link OB-K22-NordicSemi compiled Feb 14 2019 14:03:18
Hardware: V1.00

nrfjprog version: 10.2.1
JLinkARM.dll version: 6.48a

The debug interface on the Thingy52 is connected via a ribbon cable to the 5x2 DEBUG Out connector P22 on the DK.

As a simple test I'm trying to backup the Thingy52 contents: nrfjprog --family nRF52 --readcode bkp.hex --log

JLink INFO JLINK_IsConnected()
JLink INFO returns FALSE

JLink INFO JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x02, 0x00000000)
JLink INFO returns -1
JLink INFO (0001ms, 1365ms total)
JLinkARM.dll CORESIGHT_WriteAPDPReg returned error -1.

I have not changed any jumper settings from the defaults on the DK, just upgraded to the latest modem firmware.

When disconnecting the Thingy52 from the DK, it seems to read the onboard targets fine. The Thingy52 by itself also works fine.

Regards;

[Edvin]

Hello,

Are you sure that the Thingy:52 is switched on when you try to read it? It may also be that they don't have common ground, so that the programmer fails the GND detect and VDD detect tests.

Try to plug in the micro-usb port on the thingy into the same computer as the nRF91 DK is plugged in. That should set them to common ground.

Does that change the behavior?

[DevCon:52]

Hi there and thank you for your suggestions ...

Thingy:52 is switched on and breathing; both Thingy:52 and nRF91 DK connected with micro-usb to the same computer.

Unfortunately no change in behaviour.

[Edvin]

Hello,

Sorry. I tested just now, and I saw the same as you. I wasn't aware of SW11, which by default is on 1V8. Try to flip it to 3V. I had to power cycle the DK after switching this, and then I could program the Thingy. Try that.

Best regards,

Edvin

[DevCon:52]

Excellent, that did the trick; thank you very much!