GDB connection closed right after connecting

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    • GDB connection closed right after connecting

      New

      Hello there,
      Recently I updated J-Link software. Since then, I am experiencing the following problem: After I start the debug session, it detrimentally ends after the connection is established. here is the output:

      Source Code

      1. SEGGER J-Link GDB Server V6.34 Command Line Version
      2. JLinkARM.dll V6.34 (DLL compiled Aug 7 2018 15:52:23)
      3. Command line: -port 2331 -s -CPU Cortex-M -device STM32L452VE -endian little -speed 1000 -if swd -vd
      4. -----GDB Server start settings-----
      5. GDBInit file: none
      6. GDB Server Listening port: 2331
      7. SWO raw output listening port: 2332
      8. Terminal I/O port: 2333
      9. Accept remote connection: localhost only
      10. Generate logfile: off
      11. Verify download: on
      12. Init regs on start: off
      13. Silent mode: off
      14. Single run mode: on
      15. Target connection timeout: 0 ms
      16. ------J-Link related settings------
      17. J-Link Host interface: USB
      18. J-Link script: none
      19. J-Link settings file: none
      20. ------Target related settings------
      21. Target device: STM32L452VE
      22. Target interface: SWD
      23. Target interface speed: 1000kHz
      24. Target endian: little
      25. Connecting to J-Link...
      26. J-Link is connected.
      27. Firmware: J-Link ARM V8 compiled Nov 28 2014 13:44:46
      28. Hardware: V8.00
      29. S/N: XXXXXXXX
      30. OEM: SEGGER-EDU
      31. Feature(s): FlashBP, GDB
      32. Checking target voltage...
      33. Target voltage: 5.05 V (Note: connected through galvanic isolator)
      34. Listening on TCP/IP port 2331
      35. Connecting to target...Connected to target
      36. Waiting for GDB connection...Connected to 127.0.0.1
      37. GDB closed TCP/IP connection
      38. Restoring target state and closing J-Link connection...
      39. Shutting down...
      Display All
      I would appreciate all help regarding this.
      PS: J-Flash Lite utility works correctly, I can program the target.
    • New

      Hello,

      Thank you for your inquiry.
      For verification could you provide the S/N of the J-Link you are using? Is it the one you registered with?
      Generally the J-Link V8 you are using does not support Cortex-M4 targets: wiki.segger.com/Software_and_Hardware_Features_Overview
      That it works in J-Flash is pure chance.
      Unfortunately the J-Link V8 is out of support and maintenance so we recommend getting a new J-Link V10 model which includes Cortex-M4 debugging and many more new features.

      Best regards,
      Nino
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