I flashed two nrf52832 with a black magic probe. Unfortunately after reconnecting the USB, I wasn't able to flash them anymore. So, I tried the nrfjprog command line program in order to fix it. Luckily the device is still there, kind of. I tried erase and reset, but get the error.
ERROR: JLinkARM DLL reported an error. Try again. If error condition ERROR: persists, run the same command again with argument --log, contact Nordic ERROR: Semiconductor and provide the generated log.log file to them.
So, here is the log.
2020-Jul-02 01:31:57 --------------------------------------------------------------------------------
2020-Jul-02 01:31:57 nrfjprog --family nrf52 --eraseall --log
2020-Jul-02 01:31:57 nrfjprog version 10.9.0
2020-Jul-02 01:31:57 --------------------------------------------------------------------------------
2020-Jul-02 01:31:57 nRF_logger_open
2020-Jul-02 01:31:57 nRF_logger_open: nRFJProg logger opened to callback at address 0X5613D0192C60
2020-Jul-02 01:31:57 nRF_open_dll
2020-Jul-02 01:31:57 nRF_open_dll: Load library at "/opt/nrfjprog/libjlinkarm_nrf52_nrfjprogdll.so".
2020-Jul-02 01:31:57 . nRF52_logger_open
2020-Jul-02 01:31:57 . nRF52_logger_open: nRFJProg logger opened to callback at address 0X7F1184A28190
2020-Jul-02 01:31:57 . nRF52_open
2020-Jul-02 01:31:57 . . Segger_logger_open
2020-Jul-02 01:31:57 . . Segger_logger_open: nRFJProg logger opened to callback at address 0X7F1184678850
2020-Jul-02 01:31:57 . . Segger_open_dll
2020-Jul-02 01:31:57 . . Segger_open_dll: No J-Link DLL path was provided. Attempting to auto detect.
2020-Jul-02 01:31:57 . . Segger_open_dll: Load library at "/opt/SEGGER/JLink/libjlinkarm.so.6".
2020-Jul-02 01:31:57 . . . Segger_dll_version
2020-Jul-02 01:31:57 nRF_enum_emu_snr
2020-Jul-02 01:31:57 . nRF52_enum_emu_snr
2020-Jul-02 01:31:57 . . Segger_is_connected_to_emu
2020-Jul-02 01:31:57 . . Segger_enum_emu_snr
2020-Jul-02 01:31:57 . . . Segger_enum_emu_snr
2020-Jul-02 01:31:57 . . . . Segger_get_num_emus
2020-Jul-02 01:31:57 . . Segger_is_connected_to_emu
2020-Jul-02 01:31:57 nRF_connect_to_emu_with_snr
2020-Jul-02 01:31:57 . nRF52_connect_to_emu_with_snr
2020-Jul-02 01:31:57 . . Segger_is_connected_to_emu
2020-Jul-02 01:31:57 . . Segger_connect_to_emu_with_snr
2020-Jul-02 01:31:57 . . . Segger_is_connected_to_emu
2020-Jul-02 01:31:57 . . . Segger_enum_emu_snr
2020-Jul-02 01:31:57 . . . . Segger_get_num_emus
2020-Jul-02 01:31:58 . . . Segger_connect_to_emu_with_snr
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: Segger logging enabled with callback at 0x139713212772704.
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO T84D1A740 000:745.859
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO Firmware: J-Link ARM V8 compiled Nov 28 2014 13:44:46
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO T84D1A740 000:753.037
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO Hardware: V8.00
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO T84D1A740 000:753.235
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO S/N: 788594195
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO T84D1A740 000:753.302
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO OEM: SEGGER
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO T84D1A740 000:753.361
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO Feature(s): RDI,FlashDL,FlashBP,JFlash,GDB
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO T84D1A740 000:755.570
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO TELNET listener socket opened on port 19021
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO T84D1A740 000:755.873
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO WEBSRV Starting webserver
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO T84D1A740 000:756.125
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO WEBSRV Webserver running on local port 19080
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO T84D1A740 000:756.256
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO - 14.430ms returns O.K.
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO T84D1A740 000:756.360
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO JLINK_Lock()
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO T84D1A740 000:756.501
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO JLINK_GetHWStatus(...)
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO T84D1A740 000:756.874
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO - 0.436ms returns 0x00
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO T84D1A740 000:757.008
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO JLINK_ExecCommand("SetRestartOnClose = 0", ...).
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO T84D1A740 000:757.099
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO - 0.048ms returns 0x01
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO T84D1A740 000:757.194
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO JLINK_ExecCommand("DisableFlashDL", ...).
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO T84D1A740 000:757.334
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO - 0.082ms returns 0x00
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO T84D1A740 000:757.456
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO JLINK_ExecCommand("ExcludeFlashCacheRange 0x0-0xFFFFFFFF", ...).
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO T84D1A740 000:757.578
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO - 0.058ms returns 0x00
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO T84D1A740 000:757.697
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO JLINK_SetHookUnsecureDialog(...)
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO T84D1A740 000:757.820
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO - 0.186ms returns 0
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO T84D1A740 000:757.947
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO JLINK_TIF_Select(JLINKARM_TIF_SWD)
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO T84D1A740 000:762.687
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO - 4.843ms returns 0x00
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO T84D1A740 000:762.887
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO JLINK_SetSpeed(2000)
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO T84D1A740 000:763.188
2020-Jul-02 01:31:58 . . . . Segger_connect_to_emu_without_snr: JLink INFO - 0.373ms
2020-Jul-02 01:31:58 . . . . . Segger_load_core_data
2020-Jul-02 01:31:58 . . . . . Segger_load_core_data: JLink INFO T84D1A740 000:763.413
2020-Jul-02 01:31:58 . . . . . Segger_load_core_data: JLink INFO JLINK_ExecCommand("CORESIGHT_SetIndexAHBAPToUse = 0", ...).
2020-Jul-02 01:31:58 . . . . . Segger_load_core_data: JLink INFO T84D1A740 000:763.552
2020-Jul-02 01:31:58 . . . . . Segger_load_core_data: JLink INFO - 0.057ms returns 0x00
2020-Jul-02 01:31:58 . . . . . Segger_load_core_data: JLink INFO T84D1A740 000:763.686
2020-Jul-02 01:31:58 . . . . . Segger_load_core_data: JLink INFO JLINK_ExecCommand("device = nRF52", ...).
2020-Jul-02 01:31:58 . . . . . Segger_load_core_data: JLink INFO T84D1A740 000:775.021
2020-Jul-02 01:31:58 . . . . . Segger_load_core_data: JLink INFO XML file found at: /opt/SEGGER/JLink/JLinkDevices.xml
2020-Jul-02 01:31:58 . . . . . Segger_load_core_data: JLink INFO T84D1A740 000:775.949
2020-Jul-02 01:31:58 . . . . . Segger_load_core_data: JLink INFO /opt/SEGGER/JLink/JLinkDevices.xml evaluated successfully.
2020-Jul-02 01:31:58 . . . . . Segger_load_core_data: JLink INFO T84D1A740 000:785.792
2020-Jul-02 01:31:58 . . . . . Segger_load_core_data: JLink INFO Device "NRF52" selected.
2020-Jul-02 01:31:58 . . . . . Segger_load_core_data: JLink INFO T84D1A740 000:786.092
2020-Jul-02 01:31:58 . . . . . Segger_load_core_data: JLink INFO - 22.318ms returns 0x00
2020-Jul-02 01:31:58 . . Segger_read_debug_port_idr
2020-Jul-02 01:31:58 . . . Segger_read_debug_port_register
2020-Jul-02 01:31:58 . . . . Segger_read_debug_port_register
2020-Jul-02 01:31:58 . . . . . Segger_coresight_configure
2020-Jul-02 01:31:58 . . . . . Segger_coresight_configure: JLink INFO T84D1A740 000:786.292
2020-Jul-02 01:31:58 . . . . . Segger_coresight_configure: JLink INFO JLINK_CORESIGHT_Configure()
2020-Jul-02 01:31:58 . . . . . Segger_coresight_configure: JLink INFO T84D1A740 000:788.843
2020-Jul-02 01:31:58 . . . . . Segger_coresight_configure: JLink INFO - 2.672ms returns 0
2020-Jul-02 01:31:58 . . . . Segger_read_debug_port_register: JLink INFO T84D1A740 000:789.031
2020-Jul-02 01:31:58 . . . . Segger_read_debug_port_register: JLink INFO JLINK_CORESIGHT_ReadAPDPReg(DP reg 0x00)
2020-Jul-02 01:31:58 . . . . Segger_read_debug_port_register: JLink INFO T84D1A740 000:789.598
2020-Jul-02 01:31:58 . . . . Segger_read_debug_port_register: JLink INFO failed
2020-Jul-02 01:31:58 . . . . Segger_read_debug_port_register: JLink INFO T84D1A740 000:789.701
2020-Jul-02 01:31:58 . . . . Segger_read_debug_port_register: JLink INFO - 0.720ms returns -1
2020-Jul-02 01:31:58 . . . . Segger_read_debug_port_register: JLinkARM.dll reported "-1", an unknown error.
2020-Jul-02 01:31:58 . . . . . Segger_abort_debug_action
2020-Jul-02 01:31:58 . . . . . Segger_abort_debug_action: Attempting to clear any configuration errors in debug port before closing connection.
2020-Jul-02 01:31:58 . . . . . Segger_abort_debug_action: JLink INFO T84D1A740 000:789.968
2020-Jul-02 01:31:58 . . . . . Segger_abort_debug_action: JLink INFO JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)
2020-Jul-02 01:31:58 . . . . . Segger_abort_debug_action: JLink INFO T84D1A740 000:791.397
2020-Jul-02 01:31:58 . . . . . Segger_abort_debug_action: JLink INFO - 1.501ms returns -1
2020-Jul-02 01:31:58 . . . . . Segger_abort_debug_action: JLinkARM.dll reported "-1", an unknown error.
2020-Jul-02 01:31:58 . . : JLink INFO T84D1A740 000:791.605
2020-Jul-02 01:31:58 . . : JLink INFO JLINK_Unlock()
2020-Jul-02 01:31:58 nRF_close_dll
2020-Jul-02 01:31:58 . nRF52_close
2020-Jul-02 01:31:58 . . Segger_is_connected_to_emu
2020-Jul-02 01:31:58 . . Segger_is_connected_to_emu: JLink INFO T84D1A740 000:791.871
2020-Jul-02 01:31:58 . . Segger_is_connected_to_emu: JLink INFO JLINK_IsOpen()
2020-Jul-02 01:31:58 . . Segger_is_connected_to_emu: JLink INFO T84D1A740 000:791.967
2020-Jul-02 01:31:58 . . Segger_is_connected_to_emu: JLink INFO - 0.156ms returns 0x01
2020-Jul-02 01:31:58 . . : JLink INFO T84D1A740 000:792.080
2020-Jul-02 01:31:58 . . : JLink INFO JLINK_Lock()
2020-Jul-02 01:31:58 . . Segger_close
2020-Jul-02 01:31:58 . . . Segger_disconnect_from_emu
2020-Jul-02 01:31:58 . . . . Segger_disconnect_from_emu
2020-Jul-02 01:31:58 . . . . . Segger_is_connected_to_device
2020-Jul-02 01:31:58 . . . . . Segger_is_connected_to_device: JLink INFO T84D1A740 000:792.369
2020-Jul-02 01:31:58 . . . . . Segger_is_connected_to_device: JLink INFO JLINK_IsConnected()
2020-Jul-02 01:31:58 . . . . . Segger_is_connected_to_device: JLink INFO T84D1A740 000:792.443
2020-Jul-02 01:31:58 . . . . . Segger_is_connected_to_device: JLink INFO - 0.110ms returns FALSE
2020-Jul-02 01:31:58 . . . . . Segger_is_debug_region_powered
2020-Jul-02 01:31:58 . . . . . . Segger_read_debug_port_register
2020-Jul-02 01:31:58 . . . . . . . Segger_write_debug_port_register
2020-Jul-02 01:31:58 . . . . . . . Segger_write_debug_port_register: JLink INFO T84D1A740 000:792.617
2020-Jul-02 01:31:58 . . . . . . . Segger_write_debug_port_register: JLink INFO JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x02, 0x00000000)
2020-Jul-02 01:31:58 . . . . . . . Segger_write_debug_port_register: JLink INFO T84D1A740 000:793.122
2020-Jul-02 01:31:58 . . . . . . . Segger_write_debug_port_register: JLink INFO - 0.563ms returns -1
2020-Jul-02 01:31:58 . . . . . . . Segger_write_debug_port_register: JLinkARM.dll reported "-1", an unknown error.
2020-Jul-02 01:31:58 . . . . . . . . Segger_abort_debug_action
2020-Jul-02 01:31:58 . . . . . . . . Segger_abort_debug_action: Attempting to clear any configuration errors in debug port before closing connection.
2020-Jul-02 01:31:58 . . . . . . . . Segger_abort_debug_action: JLink INFO T84D1A740 000:793.408
2020-Jul-02 01:31:58 . . . . . . . . Segger_abort_debug_action: JLink INFO JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)
2020-Jul-02 01:31:58 . . . . . . . . Segger_abort_debug_action: JLink INFO T84D1A740 000:793.896
2020-Jul-02 01:31:58 . . . . . . . . Segger_abort_debug_action: JLink INFO - 0.544ms returns -1
2020-Jul-02 01:31:58 . . . . . . . . Segger_abort_debug_action: JLinkARM.dll reported "-1", an unknown error.
2020-Jul-02 01:31:58 . . . . Segger_disconnect_from_emu: JLink INFO T84D1A740 000:794.100
2020-Jul-02 01:31:58 . . . . Segger_disconnect_from_emu: JLink INFO JLINK_Unlock()
2020-Jul-02 01:31:58 . . . . Segger_disconnect_from_emu: JLink INFO T84D1A740 000:798.542
2020-Jul-02 01:31:58 . . . . Segger_disconnect_from_emu: JLink INFO JLINK_Close()
2020-Jul-02 01:31:58 . . Segger_close: Freeing Library.
2020-Jul-02 01:31:58 nRF_close_dll: Freeing Library.
