Hi.

My first post on this list so would like to say that this project
seems very promising and is something that I have been waiting for.

I wanted to get involved so I dusted of a STM32F3 discovery board and
started coding. It helped a lot that there was STM32F1 support all
ready.

I have gotten it to compile and also have flash and debug support for
the board which has a STlink v2 interface.

But I am having some problems booting the system. As my topic says the
code gets to the _Swap call and then triggers a hard fault.

Do you guys have any tips on why it crashes here?

Posting a gdb trace below:

_nano_fiber_swap () at
/home/mirzak/git/zephyr-project/kernel/nanokernel/nano_fiber.c:159
159 _Swap(imask);
(gdb) s
_Swap () at /home/mirzak/git/zephyr-project/arch/arm/core/swap.S:245
245 ldr r1, =_nanokernel
(gdb) s
246 ldr r2, [r1, #__tNANO_current_OFFSET]
(gdb) s
247 str r0, [r2, #__tTCS_basepri_OFFSET]
(gdb) s
249 svc #0
(gdb) s
__svc () at /home/mirzak/git/zephyr-project/arch/arm/core/swap.S:197
197 eors.n r0, r0
(gdb) s
198 msr BASEPRI, r0
(gdb) s
201 ldr r1, =_SCS_ICSR
(gdb) s
202 ldr r2, =_SCS_ICSR_PENDSV
(gdb) s
203 str r2, [r1, #0]
(gdb) s
208 bx lr
(gdb) s
_Swap () at /home/mirzak/git/zephyr-project/arch/arm/core/swap.S:252
252 bx lr
(gdb) s

^C
Program received signal SIGTRAP, Trace/breakpoint trap.
0x0800130a in _SysFatalErrorHandler (reason=reason(a)entry=0,
pEsf=pEsf(a)entry=0x200004f8 <main_task_stack+944>) at
/home/mirzak/git/zephyr-project/arch/arm/core/sys_fatal_error_handler.c:77
77 if ((curCtx == NANO_CTX_ISR) || _is_thread_essential()) {
(gdb) backtrace
Python Exception <type 'exceptions.ImportError'> No module named gdb.frames:
#0 0x0800130a in _SysFatalErrorHandler (reason=reason(a)entry=0,
pEsf=pEsf(a)entry=0x200004f8 <main_task_stack+944>)
at /home/mirzak/git/zephyr-project/arch/arm/core/sys_fatal_error_handler.c:77
#1 0x080011b8 in _Fault (esf=0x200004f8 <main_task_stack+944>) at
/home/mirzak/git/zephyr-project/arch/arm/core/fault.c:346
#2 0x080012c2 in __usage_fault () at
/home/mirzak/git/zephyr-project/arch/arm/core/fault_s.S:89
#3 <signal handler called>
#4 0x3d45e07c in ?? ()
#5 0xdba824f0 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Best Regards,
Mirza