Unable to program NRF52840 PDK

[C. Jimenez]

I just received my new NRF52480 PDK, but it will not respond to any commands.

I tried nrfjprog -e -f nrf52 and this is the log output:

--------------------------------------------------------------------------------
C:\Program Files (x86)\Nordic Semiconductor\nrf5x\bin\nrfjprog.exe -e -f nrf52 --log 
nrfjprog verion 9.4.0
--------------------------------------------------------------------------------
FUNCTION: open_dll.
FUNCTION: open_dll.
FUNCTION: enum_emu_snr.
FUNCTION: enum_emu_snr.
FUNCTION: enum_emu_snr.
FUNCTION: enum_emu_snr.
FUNCTION: connect_to_emu_with_snr.
FUNCTION: connect_to_emu_with_snr.
FUNCTION: connect_to_emu_without_snr.
FUNCTION: enum_emu_snr.
Device "NRF52832_XXAA" selected.
FUNCTION: read_device_version.
FUNCTION: read_device_version.
JLinkARM.dll CORESIGHT_WriteAPDPReg returned error -1.
JLinkARM.dll CORESIGHT_WriteAPDPReg returned error -102.
FUNCTION: close_dll.
FUNCTION: close_dll.

The device does show up as JLINK (removable drive) but when I try to flash a .hex file by dropping it in the directory, I see a text file called 'FAIL.TXT' and says:

Error while connecting to CPU

The last thing I tried was to use NRFgo Studio, but when I try to select the segger device there, the device resets and does not open the dialog box to erase\program the device.

[Petter Myhre]

What log do you get if you try to --recover with nrfjprog?

[C. Jimenez]

---

C:\Program Files (x86)\Nordic Semiconductor\nrf5x\bin\nrfjprog.exe --recover -f nrf52 --log
nrfjprog verion 9.4.0
--------------------------------------------------------------------------------
FUNCTION: open_dll.
FUNCTION: open_dll.
FUNCTION: enum_emu_snr.
FUNCTION: enum_emu_snr.
FUNCTION: enum_emu_snr.
FUNCTION: enum_emu_snr.
FUNCTION: connect_to_emu_with_snr.
FUNCTION: connect_to_emu_with_snr.
FUNCTION: connect_to_emu_without_snr.
FUNCTION: enum_emu_snr.
Device "NRF52832_XXAA" selected.
FUNCTION: recover.
FUNCTION: recover.
JLinkARM.dll CORESIGHT_WriteAPDPReg returned error -1.
JLinkARM.dll CORESIGHT_WriteAPDPReg returned error -102.
FUNCTION: close_dll.
FUNCTION: close_dll.

[Petter Myhre]

Ok. What J-Link version are you using? You can check with nrfjprog -v

Have you tried connecting with J-Link Commander? Does it say something like:

Connecting to J-Link via USB...O.K.
Firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Nov 14 2016 16:58:29
Hardware version: V1.00
S/N: 683379432
VTref = 3.300V

Also try to reflash the J-Link with nRF5x-OB-JLink-IF found here (drag and drop into removable drive)

[C. Jimenez]

When I run JLink Commander I get

SEGGER J-Link Commander V6.12a (Compiled Dec  2 2016 16:44:55)
DLL version V6.12a, compiled Dec  2 2016 16:44:26

Connecting to J-Link via USB...O.K.
Firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Nov 14 2016 16:58:29
Hardware version: V1.00
S/N: 683083406
VTref = 3.300V


Type "connect" to establish a target connection, '?' for help
J-Link>

When I tried to flash with nRF5x-OB-JLink-IF I received the same FAIL.TXT file from earlier. "Error While Connecting to CPU"

[Petter Myhre]

Ok. Could you try on another computer?