[NXP LPC54S018] Sometimes gdbserver cannot startup due to cannot halt CPU

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    • [NXP LPC54S018] Sometimes gdbserver cannot startup due to cannot halt CPU

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      jlink-firmware on board version: J-Link LPCXpresso V2.
      J-Link version: V6.44d
      arm-none-eabi-gdb.exe version: 7-2018-q2
      host os: windows 7

      We useJ-Link GDB server and GDB to load applications to LPC54S018, sometimes gdbserver cannot startup due to cannot halt CPU.
      In this situation, open jlink commander, and it could connect to board successful, but run command "halt" it also failed to halt CPU.
      We have to replugin usb to fix this problem.

      Need to note, if we use IAR + J-Link, it works very stable. However use J-Link in standalone will occure issue and it is very often.

      Attachments is an image is built by IAR-8.32, when load twice jlink will report halt cpu failed.

      Source Code

      1. SEGGER J-Link GDB Server V6.44d Command Line Version
      2. JLinkARM.dll V6.44d (DLL compiled Mar 27 2019 17:08:23)
      3. Command line: -select usb=729342514 -if SWD -singlerun -strict -device LPC54S018 -port 4000 -speed auto
      4. -----GDB Server start settings-----
      5. GDBInit file: none
      6. GDB Server Listening port: 4000
      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: off
      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: LPC54S018
      22. Target interface: SWD
      23. Target interface speed: auto
      24. Target endian: little
      25. Connecting to J-Link...
      26. J-Link is connected.
      27. Firmware: J-Link LPCXpresso V2 compiled Sep 23 2016 12:14:15
      28. Hardware: V1.00
      29. S/N: 729342514
      30. Checking target voltage...
      31. Target voltage: 3.30 V
      32. Listening on TCP/IP port 4000
      33. Connecting to target...WARNING: CPU could not be halted
      34. Halting target device failed. Trying again with reset
      35. WARNING: CPU could not be halted
      36. Failed to halt target device on connect
      37. ERROR: Could not connect to target.
      38. Target connection failed. GDBServer will be closed...Restoring target state and closing J-Link connection...
      39. Shutting down...
      40. Could not connect to target.
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