Not a bug: KDS breakpoints don't work with Segger JLink

davenadler — Tue, 06 Dec 2016 15:05:59 GMT

Note: This post was split into the solved portion below, and a separate bug report (missing call stack, debugger crash).
Thanks to Erich for explaining the problem below.

K64F Freedom board, KDS 3.2.0 with all available updates installed, Windows 8 64-bit host.

Latest J-link updates are installed: JLink_V612a dated 2-December (KDS and J-link firmware both updated).
While KDS mostly works for an LED blinky application we're having serious problems with anything non-trivial (like our application).

We gave up on the NXP-provided OpenSDA SWD interface as it was too slow and buggy.
Purchased a couple of Segger J-Link Base units, cut the required traces on the Freedom board, and gave it a try...

Many things work for my C/C++ application; with J-Link I can:

- download into flash (15x faster than NXP-provided programming),
- start a debug session,
- catch a breakpoint coded as "__asm("bkpt #0");"
- examine variables (both stack and static)
- pause and continue execution
- single step

Unfortunately I cannot:
- set a breakpoint in KDS IDE (it tries, but shows a funny line through Eclipse breakpoint symbol)
- see a stack call trace when the program is paused (though it shows the current routine)

Below are snapshots of:
- the funny not-set breakpoints,

Segger has confirmed these are problems with KDS.

Is there any hope of getting these problems fixed?

Would you recommend using a different development environment for non-trivial applications on K64F?

Thanks,
Best Regards, Dave

Re: BUG: KDS debug fails with Segger JLink

BlackNight — Tue, 06 Dec 2016 15:16:36 GMT

Hi Dave,

from your screenshots and breakpoint icons I see that you have turned on 'skipping all breakpoints' in Eclipse for your project?

See Skipping Breakpoints | MCU on Eclipse

With this, the breakpoints will not be set. I assume you have turned on that feature accidentially?

I hope this helps,

Erich

Re: BUG: KDS debug fails with Segger JLink

davenadler — Tue, 06 Dec 2016 16:28:42 GMT

Bingo, that's it, Thanks Erich!
I've no idea how that got set, and didn't even know the icon existed (neither did Segger; I'll pass it along).
Thanks again,
Best Regards, Dave

PS: I'm still not seeing the call stack - any ideas??

Kinetis Design Studio中的主题 Re: BUG: KDS debug fails with Segger JLink

Not a bug: KDS breakpoints don't work with Segger JLink

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Re: BUG: KDS debug fails with Segger JLink