How to recover a bricked nRF52840DK.

Question

We were developing an nRF52840 device and were working on MCUBOOT DFU firmware updates, and accidentally did an update rather than an upgrade, and now my nRF52840DK is bricked. I have two more on order as backup, but I figure it is a good learning experience to learn how to recover. 
 I have done all the things listed in this article. 
 https://devzone.nordicsemi.com/f/nordic-q-a/24592/my-nrf52-nrf51-dk-kit-doesn-t-work 
 Using my Windows 11 laptop, I can see the BOOTLOADER in Device Manager. I can reinstall the j-link-ob-sam3u128-v2-nordicsemi-170724.bin file. I have updated J-Link drivers. I can connect my Windows laptop to a separate nRF52832DK and everything works, so the development environment seems correct. I've tried these things with the IF BOOT/RESET switch held at power up, and not. I've tried these things on my MacBook, too. 
 When I tried to do a "nrjprog --recover --log", I get the log copied in below with a lot of "-1" responses. 
 I found a post about using a J-Link Commander to recover a device, but this post is more than 8 years old and doesn't cover the nRF52840DK. 
 https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/recover-the-nrf51-when-nrjprog-and-nrfgo-studio-co 
 Any thoughts on how to resurrect my trusty DK? 
 Best, 
 Steve

Fullscreen 
 7802.log.log 
 Download 
 
 [2022-Apr-20 09:45:28] [ info] --------------------------------------------------------------------------------
[2022-Apr-20 09:45:28] [ info] nrfjprog --recover --log 
[2022-Apr-20 09:45:28] [ info] nrfjprog version 10.15.4 external
[2022-Apr-20 09:45:28] [ info] --------------------------------------------------------------------------------
[2022-Apr-20 09:45:28] [ info] Load library at /Applications/Nordic Semiconductor/lib/libnrfjprogdll.dylib.
[2022-Apr-20 09:45:28] [ info] Library loaded, loading member functions.
[2022-Apr-20 09:45:28] [ info] Member functions succesfully loaded.
[2022-Apr-20 09:45:28] [debug] [ Client] - open
[2022-Apr-20 09:45:28] [debug] [ Client] - start
[2022-Apr-20 09:45:28] [ info] [ Client] - stdout: Jlinkarm nRF Worker ready. Handling sequence c8b940f0-d928-4586-a91b-2f85557e7470.
[2022-Apr-20 09:45:28] [trace] [ Client] - Command open executed for 25 milliseconds with result 0
[2022-Apr-20 09:45:28] [debug] [ Client] - enum_emu_snr
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - Logger sink registered in Segger backend logger
[2022-Apr-20 09:45:28] [debug] [ JLink] - Logger sink registered in JLink logger
[2022-Apr-20 09:45:28] [debug] [ nRFXX] - open
[2022-Apr-20 09:45:28] [debug] [ nRFXX] - just_check_family
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - open_dll
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - No J-Link DLL path was provided. Attempting to auto detect.
[2022-Apr-20 09:45:28] [ info] [SeggerBackend] - Load library at /Applications/SEGGER/JLink/libjlinkarm.7.64.3.dylib.
[2022-Apr-20 09:45:28] [ info] [SeggerBackend] - Library loaded, loading member functions.
[2022-Apr-20 09:45:28] [ info] [SeggerBackend] - Member functions succesfully loaded.
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - dll_version
[2022-Apr-20 09:45:28] [ info] [SeggerBackend] - Segger dll version 7.64.c loaded.
[2022-Apr-20 09:45:28] [trace] [ Worker] - Command open executed for 12 milliseconds with result 0
[2022-Apr-20 09:45:28] [debug] [ nRFXX] - enum_emu_con_info
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - is_connected_to_emu
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - enum_emu_con_info
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - is_connected_to_emu
[2022-Apr-20 09:45:28] [trace] [ Worker] - Command enum_emu_con_info executed for 0 milliseconds with result 0
[2022-Apr-20 09:45:28] [trace] [ Client] - Command enum_emu_con_info executed for 6 milliseconds with result 0
[2022-Apr-20 09:45:28] [debug] [ Client] - connect_to_emu_with_snr
[2022-Apr-20 09:45:28] [debug] [ nRFXX] - connect_to_emu_with_snr
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - is_connected_to_emu
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - connect_to_emu_with_snr
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - is_connected_to_emu
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - ---just_enum_emu_snr
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - ---just_get_num_emus
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - ---just_connect_to_emu_with_snr
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - ---just_connect_to_emu_without_snr
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - Segger logging enabled.
[2022-Apr-20 09:45:28] [trace] [ JLink] - Firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Jan 20 2022 16:43:31
[2022-Apr-20 09:45:28] [trace] [ JLink] - Firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Jan 20 2022 16:43:31
[2022-Apr-20 09:45:28] [trace] [ JLink] - Hardware: V1.00
[2022-Apr-20 09:45:28] [trace] [ JLink] - S/N: 683792306
[2022-Apr-20 09:45:28] [trace] [ JLink] - OEM: SEGGER
[2022-Apr-20 09:45:28] [trace] [ JLink] - Feature(s): RDI, FlashBP, FlashDL, JFlash, GDB
[2022-Apr-20 09:45:28] [trace] [ JLink] - USB speed mode: High speed (480 MBit/s)
[2022-Apr-20 09:45:28] [trace] [ JLink] - TELNET listener socket opened on port 19021
[2022-Apr-20 09:45:28] [trace] [ JLink] - WEBSRV WEBSRV_Init(): Starting webserver thread(s)
[2022-Apr-20 09:45:28] [trace] [ JLink] - WEBSRV Webserver running on local port 19080
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 5.250ms returns "O.K." 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_Lock() 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_GetHWStatus(...) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 0.099ms returns 0 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_ExecCommand("SetRestartOnClose = 0", ...). 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 0.169ms returns 0x01 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_ExecCommand("DisableFlashDL", ...). 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 0.001ms returns 0x00 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_ExecCommand("ExcludeFlashCacheRange 0x0-0xFFFFFFFF", ...). 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 0.001ms returns 0x00 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_SetHookUnsecureDialog 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_SetHookUnsecureDialog(...)
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 0.007ms returns 0 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_TIF_Select(JLINKARM_TIF_SWD) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 0.355ms returns 0x00 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_SetSpeed(2000) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 0.064ms 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_GetSN() 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 0.002ms returns 683792306 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - read_debug_port_idr
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - read_debug_port_register
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - ---just_read_debug_port_register
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - coresight_configure
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_Configure() 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 102.375ms returns 0 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - ---just_select_debug_port_register
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - Select AP 255, DP Bank 0, AP Bank 255
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x02, 0x00000000) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.660ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - ---just_abort_debug_action
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - Attempting to clear any configuration errors in debug port before closing connection. 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.614ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.654ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.647ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.689ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.637ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x02, 0x00000000) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 0.990ms returns 0 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_ReadAPDPReg(DP reg 0x00) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - failed
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.641ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - ---just_abort_debug_action
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - Attempting to clear any configuration errors in debug port before closing connection. 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.611ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.623ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.618ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.601ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.621ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_ReadAPDPReg(DP reg 0x00) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - failed
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.642ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - ---just_abort_debug_action
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - Attempting to clear any configuration errors in debug port before closing connection. 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.607ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.619ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.592ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.713ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.624ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_ReadAPDPReg(DP reg 0x00) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - failed
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.642ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - ---just_abort_debug_action
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - Attempting to clear any configuration errors in debug port before closing connection. 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ Client] - Command connect_to_emu_with_snr executed for 175 milliseconds with result 0
[2022-Apr-20 09:45:28] [debug] [ Client] - read_connected_emu_snr
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.631ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.622ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.644ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.617ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.627ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_ReadAPDPReg(DP reg 0x00) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - Value=0xFFFFF477
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.708ms returns 0 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 0.005ms 
[2022-Apr-20 09:45:28] [trace] [ Worker] - Command connect_to_emu_with_snr executed for 169 milliseconds with result 0
[2022-Apr-20 09:45:28] [debug] [ nRFXX] - read_connected_emu_snr
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - is_connected_to_emu
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_IsOpen() 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 0.004ms returns 0x01 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_Lock() 
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - read_connected_emu_snr
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 0.004ms 
[2022-Apr-20 09:45:28] [trace] [ Worker] - Command read_connected_emu_snr executed for 0 milliseconds with result 0
[2022-Apr-20 09:45:28] [trace] [ Client] - Command read_connected_emu_snr executed for 6 milliseconds with result 0
[2022-Apr-20 09:45:28] [debug] [ Client] - read_device_family
[2022-Apr-20 09:45:28] [debug] [ nRFXX] - read_device_family
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - is_connected_to_emu
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_IsOpen() 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 0.003ms returns 0x01 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_Lock() 
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - read_debug_port_idr
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - read_debug_port_register
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - ---just_read_debug_port_register
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - ---just_select_debug_port_register
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - Select AP 255, DP Bank 0, AP Bank 255
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x02, 0x00000000) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.601ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - ---just_abort_debug_action
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - Attempting to clear any configuration errors in debug port before closing connection. 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.595ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.592ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.581ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.582ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.594ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x02, 0x00000000) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.576ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - ---just_abort_debug_action
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - Attempting to clear any configuration errors in debug port before closing connection. 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.619ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.572ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.589ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.601ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.600ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x02, 0x00000000) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.605ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - ---just_abort_debug_action
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - Attempting to clear any configuration errors in debug port before closing connection. 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.595ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.613ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.605ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.612ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.589ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x02, 0x00000000) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.632ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - ---just_abort_debug_action
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - Attempting to clear any configuration errors in debug port before closing connection. 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.619ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.649ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.603ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.604ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.618ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x02, 0x00000000) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.603ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - ---just_abort_debug_action
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - Attempting to clear any configuration errors in debug port before closing connection. 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.606ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.603ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.622ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.666ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.607ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 0.017ms 
[2022-Apr-20 09:45:28] [trace] [ Worker] - Command read_device_family executed for 49 milliseconds with result -102
[2022-Apr-20 09:45:28] [trace] [ Client] - Command read_device_family executed for 56 milliseconds with result -102
[2022-Apr-20 09:45:28] [debug] [ nRFXX] - close
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - is_connected_to_emu
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_IsOpen() 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 0.005ms returns 0x01 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_Lock() 
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - close
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - disconnect_from_emu
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - ---just_disconnect_from_emu
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - is_connected_to_device
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_IsConnected() 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 0.003ms returns FALSE 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - ---just_is_debug_region_powered
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - ---just_read_debug_port_register
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - ---just_select_debug_port_register
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - Select AP 255, DP Bank 0, AP Bank 255
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x02, 0x00000000) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.644ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - ---just_abort_debug_action
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - Attempting to clear any configuration errors in debug port before closing connection. 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.645ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.618ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.617ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.673ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.628ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x02, 0x00000000) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.617ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - ---just_abort_debug_action
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - Attempting to clear any configuration errors in debug port before closing connection. 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.631ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.632ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.664ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.612ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.643ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x02, 0x00000000) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.629ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - ---just_abort_debug_action
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - Attempting to clear any configuration errors in debug port before closing connection. 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.667ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.641ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.693ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.628ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.617ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x02, 0x00000000) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.616ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - ---just_abort_debug_action
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - Attempting to clear any configuration errors in debug port before closing connection. 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.580ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.691ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.734ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.623ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.593ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x02, 0x00000000) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.623ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - ---just_abort_debug_action
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - Attempting to clear any configuration errors in debug port before closing connection. 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.626ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.631ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.636ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.626ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F) 
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 1.698ms returns -1 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_HasError() 
[2022-Apr-20 09:45:28] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
[2022-Apr-20 09:45:28] [trace] [ JLink] - - 0.015ms 
[2022-Apr-20 09:45:28] [trace] [ JLink] - JLINK_Close() 
[2022-Apr-20 09:45:28] [debug] [SeggerBackend] - Segger Backend closed.
[2022-Apr-20 09:45:28] [debug] [ nRFXX] - nRF family DLL closed
[2022-Apr-20 09:45:28] [trace] [ Client] - Command close executed for 92 milliseconds with result 0
[2022-Apr-20 09:45:28] [debug] [ Client] - terminate
[2022-Apr-20 09:45:28] [trace] [ Client] - Command terminate executed for 6 milliseconds with result 0
[2022-Apr-20 09:45:28] [trace] [ Worker] - Command close executed for 88 milliseconds with result 0
[2022-Apr-20 09:45:28] [trace] [ Worker] - Command terminate executed for 0 milliseconds with result 0
[2022-Apr-20 09:45:28] [trace] [ Worker] - Executed 7 commands for 318 milliseconds
[2022-Apr-20 09:45:28] [debug] [ Client] - Child process terminated with result 0
[2022-Apr-20 09:45:29] [trace] [ Client] - Executed 7 commands for 366 milliseconds
[2022-Apr-20 09:45:29] [debug] [ Client] - terminate

Håkon Alseth · Accepted Answer

Hi, 
 
 If your device is asserting early in the boot process, ie. it is basically performing a soft-reset in a loop, it can be hard to recover the nRF. 
 
 You can try to use j-link commander: 
 
 device nrf52840_xxaa
si 1
speed 1000
connect
 
 And see if it is able to successfully connect, and you can issue "erase" command to the nRF. 
 If that still fails, what you can do is to try to run this loop: 
 https://devzone.nordicsemi.com/f/nordic-q-a/45078/nrf52832-not-connected-anymore-after-first-trying-to-debug-keil/177579#177579 
 
 While continuously powering the nRF on/off. Note that if you're using the DK as a debugger, it is easiest to toggle power to the nRF by using the "nRF current measurement" pin header, via a jumper. 
 
 Kind regards, 
 Håkon

abvio · Answer

Hi H&aring;kon, 
 This worked! Didn't have to use the loop, it worked with the simple J-Link Commander commands you listed. 
 Thank you so much! 
 Best, 
 Steve

How to recover a bricked nRF52840DK.

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