Hi,
We designed our custom board using nrf54l05, and tried to flash it using segger J-lInk as well as using nrf54L15-DK Debuger out port using nrf connect Programmer utility. we checked and verified connections which are OK,
but facing issue of error code 9, UNKNOWN Device.
Please Help
Regards
Khodidas
Hi,
Can you try to use nRF Command line Tools and do a recover? If it fails, can you add the --log argument and share the log with us?
Make sure that the device is powered when doing this.
nrfjprog --recover --log
best regards
Jared
Already tried this , error throws. It was using nrf54l15-Dk external debugger output port
Still issue same, i have updated segger Jlink , and having nrfutil V2.8.8 already installed. Tried using nrfconnect programmer utility gives error 9 UNKNOWN device
Hi,
Instead of using nRF connect programmer, can you try to use nrfutil device from the command line and do a recover:
nrfutil device recover
Can you share a screenshot of what it returns?
regards
Jared
Hi,
We tried response is as attached
Hi,
Can you update nrfutil as well, you are using an older version,
run:
nrfutil self-upgrade
best regards
Jared
Hi,
If it still doesn't work after upgrading nrfutil and nrfutil device to the latest versions, please run:
nrfutil device recover --log-output stdout --json
This will give you a more verbose log, please upload this log and I'll discuss it with our developers,
best regards
Jared
Hi,
If it still doesn't work after upgrading nrfutil and nrfutil device to the latest versions, please run:
nrfutil device recover --log-output stdout --json
This will give you a more verbose log, please upload this log and I'll discuss it with our developers,
best regards
Jared
Hi,
check log, tried using nrfutill
C:\>nrfutil device recover --log-output=stdout --json
{"type":"log","data":{"level":"INFO","message":"nrfutil-device (version = 2.10.2, platform = x86_64-pc-windows-msvc, classification = nrf-external) invoked with recover --log-output=stdout --json ","timestamp":"2025-05-13T06:47:50.349Z"}}
{"type":"log","data":{"level":"INFO","message":"[ProbeLib] [2025-05-13 06:47:50.500997Z] Opened J-Link DLL at C:\\Program Files\\SEGGER\\JLink_V818\\JLink_x64.dll with version 8.18","timestamp":"2025-05-13T06:47:50.501Z"}}
{"type":"log","data":{"level":"INFO","message":"[ProbeLib] [2025-05-13 06:47:50.536530Z] Opened J-Link DLL at C:\\Program Files\\SEGGER\\JLink_V818\\JLink_x64.dll with version 8.18","timestamp":"2025-05-13T06:47:50.536Z"}}
{"type":"log","data":{"level":"INFO","message":"[ProbeLib] [2025-05-13 06:47:50.540598Z] Found 1 attached J-Link devices","timestamp":"2025-05-13T06:47:50.540Z"}}
{"type":"task_begin","data":{"task":{"id":"df08350c1baa4d83b56ba830c3cdc11b","description":"Recover 1057711395","name":"recover","data":{"serialNumber":"001057711395"}}}}
{"type":"log","data":{"level":"INFO","message":"[ProbeLib] [2025-05-13 06:47:50.686314Z] Handshake signatures match","timestamp":"2025-05-13T06:47:50.686Z"}}
{"type":"log","data":{"level":"INFO","message":"[ProbeLib] [2025-05-13 06:47:50.686691Z] Connection with Probe worker established.","timestamp":"2025-05-13T06:47:50.686Z"}}
{"type":"log","data":{"level":"INFO","message":"[ProbeLib] [2025-05-13 06:47:50.683891Z] {jlink_usb_001057711395} nrf-probe version 0.38.0","timestamp":"2025-05-13T06:47:50.688Z"}}
{"type":"log","data":{"level":"INFO","message":"[ProbeLib] [2025-05-13 06:47:50.692034Z] {jlink_usb_001057711395} Opened J-Link DLL at C:\\Program Files\\SEGGER\\JLink_V818\\JLink_x64.dll with version 8.18","timestamp":"2025-05-13T06:47:50.692Z"}}
{"type":"log","data":{"level":"INFO","message":"[ProbeLib] [2025-05-13 06:47:50.715969Z] {jlink_usb_001057711395} Clock frequency was set to 2000 kHz","timestamp":"2025-05-13T06:47:50.716Z"}}
{"type":"log","data":{"level":"INFO","message":"[ProbeLib] [2025-05-13 06:47:50.715993Z] {jlink_usb_001057711395} Emulator Usb(JLinkSerialNumber(1057711395)) running firmware: J-Link OB-nRF5340-NordicSemi compiled Feb 11 2025 17:15:35","timestamp":"2025-05-13T06:47:50.716Z"}}
{"type":"log","data":{"level":"INFO","message":"[ProbeLib] [2025-05-13 06:47:50.818544Z] {jlink_usb_001057711395} -> Powering up sys and debug region","timestamp":"2025-05-13T06:47:50.818Z"}}
{"type":"log","data":{"level":"WARN","message":"[ProbeLib] [2025-05-13 06:47:50.820756Z] {jlink_usb_001057711395} DAP write error: DebugPort, register DapRegisterAddress(0x08) = 0x00000000, err: Unknown Error in J-Link DLL (error code =-1)","timestamp":"2025-05-13T06:47:50.820Z"}}
{"type":"log","data":{"level":"INFO","message":"[ProbeLib] [2025-05-13 06:47:50.821734Z] {jlink_usb_001057711395} <- Powering up sys and debug region","timestamp":"2025-05-13T06:47:50.822Z"}}
{"type":"log","data":{"level":"INFO","message":"[ProbeLib] [2025-05-13 06:47:50.929480Z] {jlink_usb_001057711395} -> Powering up sys and debug region","timestamp":"2025-05-13T06:47:50.929Z"}}
{"type":"log","data":{"level":"WARN","message":"[ProbeLib] [2025-05-13 06:47:50.931516Z] {jlink_usb_001057711395} DAP write error: DebugPort, register DapRegisterAddress(0x08) = 0x00000000, err: Unknown Error in J-Link DLL (error code =-1)","timestamp":"2025-05-13T06:47:50.931Z"}}
{"type":"log","data":{"level":"INFO","message":"[ProbeLib] [2025-05-13 06:47:50.932356Z] {jlink_usb_001057711395} <- Powering up sys and debug region","timestamp":"2025-05-13T06:47:50.934Z"}}
{"type":"log","data":{"level":"INFO","message":"[ProbeLib] [2025-05-13 06:47:50.970309Z] Worker exited successfully","timestamp":"2025-05-13T06:47:50.970Z"}}
{"type":"task_end","data":{"task":{"id":"df08350c1baa4d83b56ba830c3cdc11b","description":"Recover 1057711395","name":"recover","data":{"serialNumber":"001057711395"}},"message":"Failed to recover 1057711395, Device error: Failed to write DebugPort register 0x08: Unknown Error in J-Link DLL (error code =-1)","result":"fail","error":{"code":1,"description":"Generic"}}}
Error: One or more recover tasks failed:
* 1057711395: Device error: Failed to write DebugPort register 0x08: Unknown Error in J-Link DLL (error code =-1) (Generic)
nrfutil device recover --log-output=stdout --json
Khodidas