j-link connection fail on nrf52833 DK board.

RE: j-link connection fail on nrf52833 DK board.

bini2007 — Thu, 13 Mar 2025 02:31:35 GMT

Thanks for your help.

It works well as you said before.

Thanks,

Jaehong Park

RE: j-link connection fail on nrf52833 DK board.

Håkon Alseth — Tue, 11 Mar 2025 08:52:11 GMT

Hi,

It seems that SB40 is cut:

You need to connect a female-to-female jumper wire, or a 2 pin header jumper to P22:

Kind regards,

Håkon

RE: j-link connection fail on nrf52833 DK board.

bini2007 — Tue, 11 Mar 2025 01:34:32 GMT

Hi,

I attach the picture of the nRF52833 DK board.

Maybe, the previous engineer retired from our company had been used for current measurement.

Then if so, let me know how to use a jumper on the pin-header named "nRF current measurement" and why to use it.

Thanks,

Jaehong Park

RE: j-link connection fail on nrf52833 DK board.

Håkon Alseth — Mon, 10 Mar 2025 14:33:14 GMT

Hi,

Could you share a picture of the board itself?

Has this board been used for current measurement at some point? If so, you will need a jumper on the pin-header named "nRF current measurement".

Kind regards,

Håkon

RE: j-link connection fail on nrf52833 DK board.

bini2007 — Mon, 10 Mar 2025 02:45:09 GMT

It seems that DK board was something wrong.

so I moved the hex file, ble_app_uart_pca10100_s113.hex in nRF SDK7.1 to mass storage disk of DK board.

But nRF Soc of DK board update is failed with FAIL.TXT occurred on MSD shown on PC.

I don't know well and I guess that DK board are wrong a little.

Please check how to solve it.

Thanks,

RE: j-link connection fail on nrf52833 DK board.

bini2007 — Mon, 10 Mar 2025 02:03:03 GMT

Today, I tested again with old nRF52833 DK board.

The error log changed a little as followings:

C:\Program Files\SEGGER\JLink_V794e>JLink.exe
SEGGER J-Link Commander V7.94e (Compiled Jan 15 2024 15:20:36)
DLL version V7.94e, compiled Jan 15 2024 15:18:46

Connecting to J-Link via USB...O.K.
Firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Oct 30 2023 12:12:17
Hardware version: V1.00
J-Link uptime (since boot): 0d 00h 00m 09s
S/N: 685096686
License(s): RDI, FlashBP, FlashDL, JFlash, GDB
USB speed mode: High speed (480 MBit/s)
VTref=3.300V


Type "connect" to establish a target connection, '?' for help
J-Link>connect
Please specify device / core. <Default>: NRF52833_XXAA
Type '?' for selection dialog
Device>
Please specify target interface:
  J) JTAG (Default)
  S) SWD
  T) cJTAG
TIF>S
Specify target interface speed [kHz]. <Default>: 4000 kHz
Speed>
Device "NRF52833_XXAA" selected.


Connecting to target via SWD
InitTarget() start
InitTarget() end - Took 107ms
Connect fallback: Reset via Reset pin & Connect.
InitTarget() start
InitTarget() end - Took 108ms
Cannot connect to target.
J-Link>

As you see, we can see the log, "Reset via Reset pin & Connect."

After updating JLink OB FW, this error happens.

Please advice me how to fix this.

Thanks,

RE: j-link connection fail on nrf52833 DK board.

bini2007 — Sat, 08 Mar 2025 16:53:22 GMT

In addition to above,

I have tested it with "nrfjprog --recover" and "nrfjprog --eraseall". The error log are followings:

D:\ProgramFiles\Nordic Semiconductor\nrf-command-line-tools\bin>nrfjprog.exe --recover
[error] [ Client] - Encountered error -105: Command connect_to_emu_with_snr executed for 329 milliseconds with result -105
ERROR: Unable to connect to a debugger.
[error] [ Worker] - JLinkARM.dll Open returned error 'Cannot connect to J-Link.'
ERROR: The JLinkARM DLL timed out while communicating to the J-Link probe.
ERROR: If the error condition persists, run the same command again with
ERROR: argument -- log, contact Nordic Semiconductor and provide the generated
ERROR: log.log file to them.
NOTE: For additional output, try running again with logging enabled (--log).
NOTE: Any generated log error messages will be displayed.

D:\ProgramFiles\Nordic Semiconductor\nrf-command-line-tools\bin>nrfjprog.exe --eraseall
[error] [ Client] - Encountered error -105: Command connect_to_emu_with_snr executed for 298 milliseconds with result -105
ERROR: Unable to connect to a debugger.
[error] [ Worker] - JLinkARM.dll Open returned error 'Cannot connect to J-Link.'
ERROR: The JLinkARM DLL timed out while communicating to the J-Link probe.
ERROR: If the error condition persists, run the same command again with
ERROR: argument -- log, contact Nordic Semiconductor and provide the generated
ERROR: log.log file to them.
NOTE: For additional output, try running again with logging enabled (--log).
NOTE: Any generated log error messages will be displayed.

D:\ProgramFiles\Nordic Semiconductor\nrf-command-line-tools\bin>

Please advice me how to solve it.