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nrfjprog - unable to connect to target

hotyp

Hello,

i am facing issue with nRF5x Command Line Tools. I am using custom board with nRF52832. While i am using Segger J-flash Lite there is no problem to flash program (so it is not HW issue), but nRF5x Command Tool just does not work. I tried version 9.1 and 9.0. No commands working, i am not able to recover, erase neither flash MCU. All setup is same i just switch between nRF5x Command Tool and JFlash Lite. I captured logs where i see JFlash Lite first call JLINK_Connect() but nRF5x call JLINK_IsOpen() and then JLINK_IsConnected() that returns False.

Log of successful flash via JFlash Lite.

SEGGER J-Link V6.34g Log File
DLL Compiled: Sep 26 2018 14:45:08
Logging started @ 2018-11-12 14:32

T0C90 000:000 JLINK_Api_MRU_GetList()JLINK_OpenEx(...)
Firmware: J-Link OB-STM32F072-128KB-CortexM compiled Sep 27 2018 09:37:50
Hardware: V1.00
S/N: 760010486
TELNET listener socket opened on port 19021WEBSRV 
Starting webserver (0036ms, 0039ms total)
T1234 019:906 WEBSRV Webserver running on local port 19080 (0036ms, 0039ms total)
T1234 019:906   returns O.K. (0036ms, 0039ms total)
T1234 019:942 JLINK_ExecCommand("device = NRF52832_XXAA", ...). XML file found at: C:\Program Files (x86)\SEGGER\JLink_V634g\JLinkDevices.xml (0000ms, 0039ms total)
T1234 019:943 C:\Program Files (x86)\SEGGER\JLink_V634g\JLinkDevices.xml evaluated successfully.  returns 0x00 (0094ms, 0133ms total)
T1234 020:037 JLINK_TIF_Select(JLINKARM_TIF_SWD)  returns 0x00 (0002ms, 0135ms total)
T1234 020:039 JLINK_SetSpeed(4000) (0000ms, 0135ms total)
T1234 020:039 JLINK_Connect() >0x10B TIF> >0x10F TIF> >0x10B TIF> >0x10F TIF> >0x10B TIF> >0x10F TIF> >0x10B TIF> >0x10F TIF> >0x10B TIF>Found SW-DP with ID 0x2BA01477 >0x0D TIF> >0x28 TIF> >0x0D TIF> >0x28 TIF>SWD speed too high. Reduced from 2000 kHz to 1012 kHz for stability >0x10B TIF>Found SW-DP with ID 0x2BA01477 >0x0D TIF> >0x28 TIF> >0x0D TIF> >0x28 TIF> >0x0D TIF> >0x28 TIF> >0x0D TIF> >0x28 TIF> >0x35 TIF> >0x0D TIF> >0x28 TIF>Scanning AP map to find all available APs >0x0D TIF> >0x28 TIF>
 >0x35 TIF> >0x35 TIF> >0x0D TIF> >0x28 TIF> >0x35 TIF> >0x35 TIF> >0x0D TIF> >0x28 TIF> >0x35 TIF> >0x35 TIF>AP[2]: Stopped AP scan as end of AP map has been reachedAP[0]: AHB-AP (IDR: 0x24770011)AP[1]: JTAG-AP (IDR: 0x02880000)Iterating through AP map to find AHB-AP to use >0x42 TIF> >0x28 TIF> >0x0D TIF> >0x28 TIF> >0x35 TIF> >0x35 TIF> >0x42 TIF> >0x28 TIF> >0x0D TIF> >0x28 TIF> >0x0D TIF> >0x28 TIF> >0x35 TIF> >0x35 TIF>AP[0]: Core foundAP[0]: AHB-AP ROM base: 0xE00FF000 >0x0D TIF> >0x28 TIF>
 >0x0D TIF> >0x28 TIF> >0x0D TIF> >0x28 TIF> >0x35 TIF> >0x35 TIF>CPUID register: 0x410FC241. Implementer code: 0x41 (ARM)Found Cortex-M4 r0p1, Little endian. -- Max. mem block: 0x00001908 -- CPU_ReadMem(4 bytes @ 0xE000EDF0) -- CPU_WriteMem(4 bytes @ 0xE000EDF0) -- CPU_ReadMem(4 bytes @ 0xE0002000) -- CPU_ReadMem(4 bytes @ 0xE000EDFC) -- CPU_WriteMem(4 bytes @ 0xE000EDFC) -- CPU_ReadMem(4 bytes @ 0xE0001000) -- CPU_WriteMem(4 bytes @ 0xE0001000) -- CPU_ReadMem(4 bytes @ 0xE000ED88)
 -- CPU_WriteMem(4 bytes @ 0xE000ED88) -- CPU_ReadMem(4 bytes @ 0xE000ED88) -- CPU_WriteMem(4 bytes @ 0xE000ED88)CoreSight components:ROMTbl[0] @ E00FF000 -- CPU_ReadMem(16 bytes @ 0xE00FF000) -- CPU_ReadMem(16 bytes @ 0xE000EFF0) -- CPU_ReadMem(16 bytes @ 0xE000EFE0)ROMTbl[0][0]: E000E000, CID: B105E00D, PID: 000BB00C SCS-M7 -- CPU_ReadMem(16 bytes @ 0xE0001FF0) -- CPU_ReadMem(16 bytes @ 0xE0001FE0)ROMTbl[0][1]: E0001000, CID: B105E00D, PID: 003BB002 DWT -- CPU_ReadMem(16 bytes @ 0xE0002FF0)
 -- CPU_ReadMem(16 bytes @ 0xE0002FE0)ROMTbl[0][2]: E0002000, CID: B105E00D, PID: 002BB003 FPB -- CPU_ReadMem(16 bytes @ 0xE0000FF0) -- CPU_ReadMem(16 bytes @ 0xE0000FE0)ROMTbl[0][3]: E0000000, CID: B105E00D, PID: 003BB001 ITM -- CPU_ReadMem(16 bytes @ 0xE00FF010) -- CPU_ReadMem(16 bytes @ 0xE0040FF0) -- CPU_ReadMem(16 bytes @ 0xE0040FE0)ROMTbl[0][4]: E0040000, CID: B105900D, PID: 000BB9A1 TPIU -- CPU_ReadMem(16 bytes @ 0xE0041FF0) -- CPU_ReadMem(16 bytes @ 0xE0041FE0)
ROMTbl[0][5]: E0041000, CID: B105900D, PID: 000BB925 ETM  returns 0x00 (0377ms, 0512ms total)
T1234 020:416 JLINK_Reset() -- CPU is running -- CPU_WriteMem(4 bytes @ 0xE000EDF0) -- CPU is running -- CPU_WriteMem(4 bytes @ 0xE000EDFC) >0x35 TIF> -- CPU is running -- CPU_WriteMem(4 bytes @ 0xE000ED0C) >0x0D TIF> >0x28 TIF> -- CPU_ReadMem(4 bytes @ 0xE000EDF0) -- CPU_ReadMem(4 bytes @ 0xE000EDF0) -- CPU is running -- CPU_WriteMem(4 bytes @ 0xE000EDF0) -- CPU is running -- CPU_WriteMem(4 bytes @ 0xE000EDFC) -- CPU_ReadMem(4 bytes @ 0xE000EDF0) -- CPU_WriteMem(4 bytes @ 0xE0002000)
 -- CPU_ReadMem(4 bytes @ 0xE000EDFC) -- CPU_ReadMem(4 bytes @ 0xE0001000) (0077ms, 0589ms total)
T1234 020:495 JLINK_DownloadFile()JLINK_BeginDownload(Flags = 0x00) (0005ms, 0595ms total)
T1234 020:495 JLINK_WriteMem(0x00000000, 0x114A0 Bytes, ...) - Data: 00 00 01 20 89 B3 00 00 CD B3 00 00 CF B3 00 00 ... -- Read from flash cache (70816 bytes @ 0x00000000)  returns 0x114A0 (0008ms, 0598ms total)
T1234 020:495 JLINK_EndDownload() -- CPU_ReadMem(4 bytes @ 0xE000ED90) -- CPU_ReadMem(4 bytes @ 0xE000ED94) -- -------------------------------------- -- Start of determining dirty areas in flash cache -- End of determining dirty areas -- Start of preparing flash programming -- Calculating RAM usage -- RAM usage = 5804 Bytes -- Preserving CPU registers -- Preparing memory -- Preparing target -- Downloading RAMCode -- Checking target RAM -- Preparing RAMCode -- End of preparing flash programming
 -- CPU speed could not be measured. -- Start of comparing flash -- CRC check was estimated as fastest method -- Comparing range 0x0000 - 0x11FFF (18 Sectors, 72 KB), using multi-block CRC calculation -- All CRCs match -- Comparing range 0x0000 - 0x11FFF (18 Sectors, 72 KB), using alternative multi-block CRC calculation -- All CRCs match -- End of comparing flash -- Start of erasing sectors -- End of erasing sectors -- Start of flash programming -- End of flash programming -- Start of verifying flash
 -- End of verifying flash -- Start of restoring -- Restoring RAMCode -- Restore target -- Restore memory -- Restoring CPU registers -- End of restoring -- Bank 0 @ 0x00000000: Skipped. Contents already match -- Bank 0 @ 0x00000000: Skipped. Contents already match  returns 0x00 (0156ms, 0746ms total)
T1234 020:495   returns 0x00 (0156ms, 0746ms total)
T1234 020:679 JLINK_Close() -- CPU_ReadMem(4 bytes @ 0xE0001000) >0x0D TIF> >0x28 TIF> >0x0D TIF> >0x28 TIF> >0x0D TIF> >0x28 TIF> >0x0D TIF> >0x28 TIF> >0x0D TIF> >0x28 TIF> >0x0D TIF> >0x28 TIF> >0x0D TIF> >0x28 TIF> >0x0D TIF> >0x28 TIF> >0x35 TIF> >0x0D TIF> >0x28 TIF> (0019ms, 0765ms total)
T1234 020:679  (0019ms, 0765ms total)
T1234 020:679 Closed (0019ms, 0765ms total)

Log of unsuccessful flash via nRF5x Command Line Tools:

SEGGER J-Link V6.34g Log File
DLL Compiled: Sep 26 2018 14:45:08
Logging started @ 2018-11-12 14:36

T351C 000:000 JLINK_GetDLLVersion()  returns 63407 (0000ms, 0000ms total)
T351C 000:000 JLINK_IsOpen()  returns 0x00 (0000ms, 0000ms total)
T351C 000:000 JLINK_EMU_GetNumDevices()  returns 0x01 (0003ms, 0003ms total)
T351C 000:003 JLINK_EMU_SelectByUSBSN(SerialNo = 760010486)  returns 0x00 (0001ms, 0004ms total)
T351C 000:004 JLINK_OpenEx(...)
Firmware: J-Link OB-STM32F072-128KB-CortexM compiled Sep 27 2018 09:37:50
Hardware: V1.00
S/N: 760010486
TELNET listener socket opened on port 19021WEBSRV 
Starting webserver (0031ms, 0035ms total)
T351C 000:004 WEBSRV Webserver running on local port 19080 (0032ms, 0036ms total)
T351C 000:004   returns O.K. (0032ms, 0036ms total)
T351C 000:036 JLINK_GetHWStatus(...)  returns 0x00 (0000ms, 0036ms total)
T351C 000:036 JLINK_ExecCommand("Device = NRF52832_xxAA", ...). XML file found at: C:\Program Files (x86)\SEGGER\JLink_V634g\JLinkDevices.xml (0001ms, 0037ms total)
T351C 000:036 C:\Program Files (x86)\SEGGER\JLink_V634g\JLinkDevices.xml evaluated successfully.Device "NRF52832_XXAA" selected.  returns 0x00 (0090ms, 0126ms total)
T351C 000:126 JLINK_ExecCommand("SetRestartOnClose = 0", ...).   returns 0x01 (0000ms, 0126ms total)
T351C 000:126 JLINK_ExecCommand("DisableFlashDL", ...).   returns 0x00 (0000ms, 0126ms total)
T351C 000:126 JLINK_ExecCommand("SetDbgPowerDownOnClose = 1", ...).   returns 0x01 (0000ms, 0126ms total)
T351C 000:126 JLINK_ExecCommand("ExcludeFlashCacheRange 0x0-0xFFFFFFFF", ...).   returns 0x00 (0000ms, 0126ms total)
T351C 000:126 JLINK_TIF_Select(JLINKARM_TIF_SWD)  returns 0x00 (0002ms, 0128ms total)
T351C 000:128 JLINK_SetSpeed(2000) (0000ms, 0128ms total)
T351C 000:129 JLINK_IsOpen()  returns 0x01 (0000ms, 0128ms total)
T351C 000:129 JLINK_IsConnected()  returns FALSE (0000ms, 0128ms total)
T351C 000:129 JLINK_CORESIGHT_Configure()  returns 0 (0101ms, 0229ms total)
T351C 000:230 JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x02, 0x00000000)  returns -1 (0001ms, 0230ms total)
T351C 000:232 JLINK_IsOpen()  returns 0x01 (0000ms, 0230ms total)
T351C 000:232 JLINK_IsConnected()  returns FALSE (0000ms, 0230ms total)
T351C 000:249 JLINK_Close() (0004ms, 0234ms total)
T351C 000:249  (0004ms, 0234ms total)
T351C 000:249 Closed (0004ms, 0234ms total)

nRF5x Command Line Tools Log:

2018-Nov-12 14:38:24  --------------------------------------------------------------------------------
2018-Nov-12 14:38:24  nrfjprog.exe -f NRF52 --program leo.hex --chiperase --log
2018-Nov-12 14:38:24  nrfjprog version 9.8.0
2018-Nov-12 14:38:24  --------------------------------------------------------------------------------
2018-Nov-12 14:38:24  nRF_open_dll
2018-Nov-12 14:38:24  . nRF52_open_dll
2018-Nov-12 14:38:24  . . nRF52_dll_version
2018-Nov-12 14:38:24  nRF_enum_emu_snr
2018-Nov-12 14:38:24  . nRF52_enum_emu_snr
2018-Nov-12 14:38:24  . . nRF52_enum_emu_snr
2018-Nov-12 14:38:24  nRF_enum_emu_snr
2018-Nov-12 14:38:24  . nRF52_enum_emu_snr
2018-Nov-12 14:38:24  . . nRF52_enum_emu_snr
2018-Nov-12 14:38:24  nRF_connect_to_emu_with_snr
2018-Nov-12 14:38:24  . nRF52_connect_to_emu_with_snr
2018-Nov-12 14:38:24  . . nRF52_is_connected_to_emu
2018-Nov-12 14:38:24  . . nRF52_enum_emu_snr
2018-Nov-12 14:38:24  . . nRF52_connect_to_emu_with_snr
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	 Firmware: J-Link OB-STM32F072-128KB-CortexM compiled Sep 27 2018 09:37:50
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	 Hardware: V1.00
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	 S/N: 760010486
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	 TELNET listener socket opened on port 19021
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	WEBSRV  Starting webserver
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	 (0036ms, 0042ms total)  
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	WEBSRV Webserver running on local port 19080
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	 (0037ms, 0043ms total)  
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	  returns O.K.
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	 (0037ms, 0043ms total)  
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	JLINK_GetHWStatus(...)
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	  returns 0x00
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	 (0001ms, 0045ms total)  
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	There is no generic nRF52 device in J-Link, so we select NRF52832_xxAA.

2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	JLINK_ExecCommand("Device = NRF52832_xxAA", ...). 
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	XML file found at: C:\Program Files (x86)\SEGGER\JLink_V634g\JLinkDevices.xml
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	 (0001ms, 0047ms total)  
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	C:\Program Files (x86)\SEGGER\JLink_V634g\JLinkDevices.xml evaluated successfully.
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	Device "NRF52832_XXAA" selected.
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	Device "NRF52832_XXAA" selected.
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	  returns 0x00
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	 (0099ms, 0145ms total)  
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	JLINK_ExecCommand("SetRestartOnClose = 0", ...). 
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	  returns 0x01
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	 (0000ms, 0147ms total)  
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	JLINK_ExecCommand("DisableFlashDL", ...). 
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	  returns 0x00
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	 (0000ms, 0148ms total)  
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	JLINK_ExecCommand("SetDbgPowerDownOnClose = 1", ...). 
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	  returns 0x01
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	 (0001ms, 0150ms total)  
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	JLINK_ExecCommand("ExcludeFlashCacheRange 0x0-0xFFFFFFFF", ...). 
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	  returns 0x00
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	 (0001ms, 0151ms total)  
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	JLINK_TIF_Select(JLINKARM_TIF_SWD)
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	  returns 0x00
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	 (0002ms, 0153ms total)  
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	JLINK_SetSpeed(2000)
2018-Nov-12 14:38:24  . . . nRF52_connect_to_emu_without_snr:	JLink:	 (0000ms, 0153ms total)  
2018-Nov-12 14:38:24  nRF_read_device_version
2018-Nov-12 14:38:24  . nRF52_read_device_version
2018-Nov-12 14:38:24  . . nRF52_is_connected_to_emu
2018-Nov-12 14:38:24  . . nRF52_is_connected_to_emu:	JLink:	JLINK_IsOpen()
2018-Nov-12 14:38:24  . . nRF52_is_connected_to_emu:	JLink:	  returns 0x01
2018-Nov-12 14:38:24  . . nRF52_is_connected_to_emu:	JLink:	 (0001ms, 0155ms total)  
2018-Nov-12 14:38:24  . . nRF52_is_connected_to_device
2018-Nov-12 14:38:24  . . nRF52_is_connected_to_device:	JLink:	JLINK_IsConnected()
2018-Nov-12 14:38:24  . . nRF52_is_connected_to_device:	JLink:	  returns FALSE
2018-Nov-12 14:38:24  . . nRF52_is_connected_to_device:	JLink:	 (0001ms, 0156ms total)  
2018-Nov-12 14:38:24  . . nRF52_readback_status
2018-Nov-12 14:38:24  . . . nRF52_is_ctrl_ap_available
2018-Nov-12 14:38:24  . . . . nRF52_read_access_port_register
2018-Nov-12 14:38:24  . . . . . nRF52_coresight_configure
2018-Nov-12 14:38:24  . . . . . nRF52_coresight_configure:	JLink:	JLINK_CORESIGHT_Configure()
2018-Nov-12 14:38:24  . . . . . nRF52_coresight_configure:	JLink:	  returns 0
2018-Nov-12 14:38:24  . . . . . nRF52_coresight_configure:	JLink:	 (0103ms, 0259ms total)  
2018-Nov-12 14:38:24  . . . . . nRF52_power_debug_and_system_regions
2018-Nov-12 14:38:24  . . . . . . nRF52_write_debug_port_register
2018-Nov-12 14:38:24  . . . . . . nRF52_write_debug_port_register:	JLink:	JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x02, 0x00000000)
2018-Nov-12 14:38:24  . . . . . . nRF52_write_debug_port_register:	JLink:	  returns -1
2018-Nov-12 14:38:24  . . . . . . nRF52_write_debug_port_register:	JLink:	 (0005ms, 0266ms total)  
2018-Nov-12 14:38:24  . . . . . . nRF52_write_debug_port_register:	JLinkARM.dll CORESIGHT_WriteAPDPReg returned error -1.

2018-Nov-12 14:38:24  . . . . . nRF52_power_debug_and_system_regions:	JLinkARM.dll CORESIGHT_WriteAPDPReg returned error -102.

2018-Nov-12 14:38:24  nRF_close_dll
2018-Nov-12 14:38:24  . nRF52_close_dll
2018-Nov-12 14:38:24  . . nRF52_is_connected_to_emu
2018-Nov-12 14:38:24  . . nRF52_is_connected_to_emu:	JLink:	JLINK_IsOpen()
2018-Nov-12 14:38:24  . . nRF52_is_connected_to_emu:	JLink:	  returns 0x01
2018-Nov-12 14:38:24  . . nRF52_is_connected_to_emu:	JLink:	 (0002ms, 0270ms total)  
2018-Nov-12 14:38:24  . . nRF52_disconnect_from_emu
2018-Nov-12 14:38:24  . . . nRF52_is_connected_to_device
2018-Nov-12 14:38:24  . . . nRF52_is_connected_to_device:	JLink:	JLINK_IsConnected()
2018-Nov-12 14:38:24  . . . nRF52_is_connected_to_device:	JLink:	  returns FALSE
2018-Nov-12 14:38:24  . . . nRF52_is_connected_to_device:	JLink:	 (0002ms, 0273ms total)  
2018-Nov-12 14:38:24  . . . nRF52_unpower_debug_and_system_regions
2018-Nov-12 14:38:24  . . nRF52_disconnect_from_emu:	JLink:	JLINK_Close()

Thank you for your help

  • 0

    Hi,

     

    Is your external board powered with 3.3V? If it is battery powered, it might be that the battery itself is depleted.

    JLink ODB devices require a set voltage in order to program a device properly.

    If you open up JLink Commander, it should report back the voltage of the target.

    Kind regards,

    Håkon

  • 0 in reply to Håkon Alseth

    Hi Hakon,

    device is powered by power supply. Now i am using JLink Commander itself to flash firmware and also everything works fine,  but nRF5x Command Line Tools does not work.

    SEGGER J-Link Commander V6.34g (Compiled Sep 26 2018 14:45:38)
DLL version V6.34g, compiled Sep 26 2018 14:45:08

Connecting to J-Link via USB...O.K.
Firmware: J-Link OB-STM32F072-128KB-CortexM compiled Sep 27 2018 09:37:50
Hardware version: V1.00
S/N: 760010486
VTref=3.300V


Type "connect" to establish a target connection, '?' for help
J-Link>connect
Please specify device / core. <Default>: NRF52832_XXAA
Type '?' for selection dialog
Device><default>
Please specify target interface:
  J) JTAG (Default)
  S) SWD
  F) FINE
  I) ICSP
  C) C2
  T) cJTAG
TIF>SWD
Specify target interface speed [kHz]. <Default>: 4000 kHz
Speed>4000
Device "NRF52832_XXAA" selected.


Connecting to target via SWD
Found SW-DP with ID 0x2BA01477
SWD speed too high. Reduced from 2000 kHz to 1012 kHz for stability
Found SW-DP with ID 0x2BA01477
Scanning AP map to find all available APs
AP[2]: Stopped AP scan as end of AP map has been reached
AP[0]: AHB-AP (IDR: 0x24770011)
AP[1]: JTAG-AP (IDR: 0x02880000)
Iterating through AP map to find AHB-AP to use
AP[0]: Core found
AP[0]: AHB-AP ROM base: 0xE00FF000
CPUID register: 0x410FC241. Implementer code: 0x41 (ARM)
Found Cortex-M4 r0p1, Little endian.
FPUnit: 6 code (BP) slots and 2 literal slots
CoreSight components:
ROMTbl[0] @ E00FF000
ROMTbl[0][0]: E000E000, CID: B105E00D, PID: 000BB00C SCS-M7
ROMTbl[0][1]: E0001000, CID: B105E00D, PID: 003BB002 DWT
ROMTbl[0][2]: E0002000, CID: B105E00D, PID: 002BB003 FPB
ROMTbl[0][3]: E0000000, CID: B105E00D, PID: 003BB001 ITM
ROMTbl[0][4]: E0040000, CID: B105900D, PID: 000BB9A1 TPIU
ROMTbl[0][5]: E0041000, CID: B105900D, PID: 000BB925 ETM
Cortex-M4 identified.

  • +1 in reply to hotyp

    Hi,

     

    "SWD speed too high. Reduced from 2000 kHz to 1012 kHz for stability"

    Could you try to call nrfjprog with the switch "-c 125" to see if this makes a difference? This will turn the SWD clock speed down from 2 MHz to 125 kHz.

    Best regards,

    Håkon

  • 0 in reply to Håkon Alseth

    Hi,

    this solve the problem. What i do not understand is why with other tools everything works fine even with 4 MHz speed.

    Best regards

    Honza

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