RE: nRF52840 DK disconnects when programming in a virtual Linux environment

DamianSof — Tue, 29 Jun 2021 20:45:28 GMT

Hi Stian,

Yes the firmware update you suggested fixed it. Thank you for your help.

RE: nRF52840 DK disconnects when programming in a virtual Linux environment

Stian Røed Hafskjold — Tue, 29 Jun 2021 14:30:23 GMT

[quote user="DamianSof"][2021-Jun-29 22:10:53] [ info] [ JLink] - [Info ] [JLink ] Updating firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Feb 2 2021 16:47:20
[2021-Jun-29 22:10:53] [ info] [ JLink] - [Info ] [JLink ] Replacing firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Mar 17 2020 14:43:00[/quote]

Looks to me like it's trying to upgrade the J-Link OB firmware on the DK before actually flashing the application on the nrF52, but then fails.

Can you try to install the newest JLink drivers on the host computer, and then open the JLink Commander or similar to do the JLink OB firmware upgrade? Then you can try to connect the DK to the VM again and flash the application. It should now program the application without trying to upgrade the JLink FW first.

RE: nRF52840 DK disconnects when programming in a virtual Linux environment

DamianSof — Tue, 29 Jun 2021 12:15:32 GMT

Sure Stian,

Here is the output of the log.log file

[2021-Jun-29 22:10:53] [ info] --------------------------------------------------------------------------------
[2021-Jun-29 22:10:53] [ info] nrfjprog -f nrf52 --log --program _build/nrf52840_xxaa.hex --sectorerase
[2021-Jun-29 22:10:53] [ info] nrfjprog version 10.12.2
[2021-Jun-29 22:10:53] [ info] --------------------------------------------------------------------------------
[2021-Jun-29 22:10:53] [debug] [ nRF0x0] - open_dll
[2021-Jun-29 22:10:53] [ info] [ nRF0x0] - Load library at /home/damian/Documents/nRF-Command-Line-Tools_10_12_2_Linux-amd64/nrfjprog/libjlinkarm_nrf52_nrfjprogdll.so.
[2021-Jun-29 22:10:53] [ info] [ nRF0x0] - Library loaded, loading member functions.
[2021-Jun-29 22:10:53] [ info] [ nRF0x0] - Member functions succesfully loaded.
[2021-Jun-29 22:10:53] [ info] [Backend] - Logger callback at 0x55bd2b944150 registered in Segger backend logger.
[2021-Jun-29 22:10:53] [ info] [ JLink] - [Info    ] [JLink     ] Logger callback at 0x55bd2b944150 registered in JLink logger.
[2021-Jun-29 22:10:53] [debug] [nRF520x0] - open
[2021-Jun-29 22:10:53] [debug] [Backend] - open_dll
[2021-Jun-29 22:10:53] [ info] [Backend] - No J-Link DLL path was provided. Attempting to auto detect.
[2021-Jun-29 22:10:53] [ info] [Backend] - Load library at /opt/SEGGER/JLink/libjlinkarm.so.7.
[2021-Jun-29 22:10:53] [ info] [Backend] - Library loaded, loading member functions.
[2021-Jun-29 22:10:53] [ info] [Backend] - Member functions succesfully loaded.
[2021-Jun-29 22:10:53] [debug] [Backend] - dll_version
[2021-Jun-29 22:10:53] [ info] [Backend] - Segger dll version 7.22.b loaded.
[2021-Jun-29 22:10:53] [debug] [ nRF0x0] - enum_emu_snr
[2021-Jun-29 22:10:53] [debug] [nRF520x0] - enum_emu_snr
[2021-Jun-29 22:10:53] [debug] [Backend] - is_connected_to_emu
[2021-Jun-29 22:10:53] [debug] [Backend] - enum_emu_snr
[2021-Jun-29 22:10:53] [debug] [Backend] - ---just_enum_emu_snr
[2021-Jun-29 22:10:53] [debug] [Backend] - ---just_get_num_emus
[2021-Jun-29 22:10:53] [debug] [Backend] - is_connected_to_emu
[2021-Jun-29 22:10:53] [debug] [ nRF0x0] - connect_to_emu_with_snr
[2021-Jun-29 22:10:53] [debug] [nRF520x0] - connect_to_emu_with_snr
[2021-Jun-29 22:10:53] [debug] [Backend] - is_connected_to_emu
[2021-Jun-29 22:10:53] [debug] [Backend] - connect_to_emu_with_snr
[2021-Jun-29 22:10:53] [debug] [Backend] - is_connected_to_emu
[2021-Jun-29 22:10:53] [debug] [Backend] - ---just_enum_emu_snr
[2021-Jun-29 22:10:53] [debug] [Backend] - ---just_get_num_emus
[2021-Jun-29 22:10:53] [debug] [Backend] - ---just_connect_to_emu_with_snr
[2021-Jun-29 22:10:53] [debug] [Backend] - ---just_connect_to_emu_without_snr
[2021-Jun-29 22:10:53] [ info] [Backend] - Segger logging enabled.
[2021-Jun-29 22:10:53] [ info] [ JLink] - [Info    ] [JLink     ] Firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Mar 17 2020 14:43:00
[2021-Jun-29 22:10:53] [ info] [ JLink] - [Info    ] [JLink     ] Firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Mar 17 2020 14:43:00
[2021-Jun-29 22:10:53] [ info] [ JLink] - [Info    ] [JLink     ] Updating firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Feb 2 2021 16:47:20
[2021-Jun-29 22:10:53] [ info] [ JLink] - [Info    ] [JLink     ] Updating firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Feb 2 2021 16:47:20
[2021-Jun-29 22:10:53] [ info] [ JLink] - [Info    ] [JLink     ] Replacing firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Mar 17 2020 14:43:00
[2021-Jun-29 22:10:53] [ info] [ JLink] - [Info    ] [JLink     ] Replacing firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Mar 17 2020 14:43:00
[2021-Jun-29 22:11:40] [ info] [ JLink] - [Info    ] [JLink     ]    ***** Error:
[2021-Jun-29 22:11:40] [ info] [ JLink] - [Info    ] [JLink     ] Communication timeout. Emulator did not re-enumerate.
[2021-Jun-29 22:11:40] [ info] [ JLink] - [Info    ] [JLink     ]    ***** Error:
[2021-Jun-29 22:11:40] [ info] [ JLink] - [Info    ] [JLink     ] Cannot connect to J-Link
[2021-Jun-29 22:11:40] [ info] [ JLink] - [Info    ] [JLink     ] - 47139.052ms returns "Communication timeout. Emulator did not re-enumerate. Cannot connect to J-Link"
[2021-Jun-29 22:11:40] [ info] [ JLink] - [Info    ] [JLink     ] JLINK_HasError()
[2021-Jun-29 22:11:40] [ info] [Backend] - JLinkARM.dll Open returned error 'Communication timeout. Emulator did not re-enumerate.
Cannot connect to J-Link'
[2021-Jun-29 22:11:40] [debug] [Backend] - is_connected_to_emu
[2021-Jun-29 22:11:40] [ info] [ JLink] - [Info    ] [JLink     ] JLINK_IsOpen()
[2021-Jun-29 22:11:40] [ info] [ JLink] - [Info    ] [JLink     ] - 0.004ms returns 0x00
[2021-Jun-29 22:11:40] [ info] [ JLink] - [Info    ] [JLink     ] JLINK_HasError()
[2021-Jun-29 22:11:40] [debug] [ nRF0x0] - close_dll
[2021-Jun-29 22:11:40] [debug] [nRF520x0] - close
[2021-Jun-29 22:11:40] [debug] [Backend] - is_connected_to_emu
[2021-Jun-29 22:11:40] [ info] [ JLink] - [Info    ] [JLink     ] JLINK_IsOpen()
[2021-Jun-29 22:11:40] [ info] [ JLink] - [Info    ] [JLink     ] - 0.004ms returns 0x00
[2021-Jun-29 22:11:40] [ info] [ JLink] - [Info    ] [JLink     ] JLINK_HasError()
[2021-Jun-29 22:11:40] [debug] [Backend] - close
[2021-Jun-29 22:11:40] [debug] [Backend] - disconnect_from_emu
[2021-Jun-29 22:11:40] [debug] [Backend] - is_connected_to_emu
[2021-Jun-29 22:11:40] [ info] [ JLink] - [Info    ] [JLink     ] JLINK_IsOpen()
[2021-Jun-29 22:11:40] [ info] [ JLink] - [Info    ] [JLink     ] - 0.003ms returns 0x00
[2021-Jun-29 22:11:40] [ info] [ JLink] - [Info    ] [JLink     ] JLINK_HasError()
[2021-Jun-29 22:11:40] [debug] [Backend] - Segger Backend closed.
[2021-Jun-29 22:11:40] [debug] [nRF520x0] - nRF family DLL closed

RE: nRF52840 DK disconnects when programming in a virtual Linux environment

Stian Røed Hafskjold — Tue, 29 Jun 2021 12:04:55 GMT

Hi, can you try to run nrfjprog with the --log argument and provide the generated log.log file? Thanks