• State Accepted Answer
  • +1 person also asked this people also asked this
  • Locked Locked
  • Replies 16 replies
  • Subscribers 23 subscribers
  • Views 7401 views
  • Users 0 members are here
2025 survey

We are running a survey to help us improve the experience for all of our members. If you see the survey appear, please take the time to tell us about your experience if you can.

Options
Related
How was your experience today?
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

BKPT 0xAB - problem without SWI

Internet PC

Hi,

I have the same problem, program stuck at bkpt 0xab, but I do not use serial wire interface (SWI). The Ulink2 is configured JTAG and SWJ checkbox is noch marked.
My program runs before I added C++ code (a mix of c and cpp files - main() is in a standerd c file), sprintf() is used now - but not printf().
Any ideas?

Parents Reply Children
  • 0 in reply to Marcus Harnisch

    Hi,

    you are right this forum software is not worth the name.

    Marcus, I've read in http://infocenter.arm.com already. This is one of the useless documentation, because there are no examples.
    I've found the following there:
    " ... However, you cannot reimplement the _sys_ prefixed functions (for example, _sys_read()) when using the standalone C library because they require library initialization. ..."
    I could replace _sys_exit and _ttywrch but not _sys_open.
    Is it really not possible to replace _sys_open()?

    In an IAR environment you can handle this all with one single linker option.
    Sooner or later (I think sooner) I'll get crazy with this KEIL *** ...

    I do not have more time wasting with that.

    Edi

  • 0 in reply to Internet PC

    Hi Marcus,

    may I solve the problem using another device instead of ULINK2?
    Or is there a much better library?

    Edi

  • 0 in reply to Internet PC

    This issue is specific to the ARM RVCT C library. Agreed, ARM should spend more time providing hands on examples in the documentation. But meanwhile you should have found some examples yourself. Like for instance "%PROGRAMFILES%\Keil\ARM\Examples\Hello\Retarget.c". Hopefully this will give you some more information.

    When supported by the tool chain, semihosting is a very useful mechanism in certain situations. If you care, read some background information here: infocenter.arm.com/.../Bgbjjgij.html

    --
    Marcus

  • 0 in reply to Marcus Harnisch

    Hi Marcus,

    last questions, otherwise I use an other development system:
    1) Is it possible to get _sys_open handled like _sys_exit?
    2) Can I link the softinterrupt bkpt 0xab to an (empty) function of mine?
    3) Could 2) help?

    Edi