Problem debugging FreeRTOS with GDB in KDS

amprel — Sat, 18 Jun 2016 13:55:46 GMT

Hello everybody,

I have the following problem. The scenario first:

Custom board with Kinetis K10
KDS 3.0.0
Pemicro Multilink Universal debugger
FreeRTOS 9.0.0 (I'm using the GCC / Cortex M3 port)
I'm not using Processor Expert

The problem: when debugging a program with FreeRTOS, I can set breakpoints and step through code, but when I try to return from a function by stepping on its last instruction (i.e. closing curly bracket), gdb crashes. In the console I get the following errors:

Unable to go into background mode.

Error communicating to target processor - try a RESET.

PE-ERROR: TARGET IS RUNNING

It looks like something in the stack frame confuses gdb. The same program works as expected if I let it run without debugging. Please note that when I debug a program without FreeRTOS everything works like a charm.

Also, in FreeRTOSConfig.h, I have added the following line:

#define configTASK_RETURN_ADDRESS 0 /* return address of task is zero */

as suggested in the post 'GDB PEMicro Interface Debugging' (nov. 2014).

Thank you in advance for your help, which would be greatly appreciated.

Alex

Re: Problem debugging FreeRTOS with GDB in KDS

soledad — Fri, 24 Jun 2016 21:20:37 GMT

Hello,

could you please try creating a new project according the following document: Creating a FreeRTOS project using KDS and Kinetis SDK Project V2.0

Then please follow the below document:

GDB Debugging with Kinetis Design Studio

Please let me know if this helps.

Have a great day,
Sol

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topic Problem debugging FreeRTOS with GDB in KDS in Kinetis Design Studio

Problem debugging FreeRTOS with GDB in KDS

Re: Problem debugging FreeRTOS with GDB in KDS