Posted on May 01, 2015 at 11:23Hello,
I�m quit new to STs micro controllers and openocd. I want to use the STM32L152RE on a Nucleo board. I�ve installed the head version of openocd to get support for this board. I start openocd with following parameters:
openocd -f board/st_nucleo_l1.cfg
My .gdbinit file looks like this:
target remote localhost:3333
monitor reset
symbol /Users/todi/ebtks/build/source/ebtks.elf
When starting gdb, it looks like that every time the PC of the CPU is at 0x08000242:
> arm-none-eabi-gdb
�
0x08000242 in ?? ()
Unable to match requested speed 300 kHz, using 240 kHz
Unable to match requested speed 300 kHz, using 240 kHz
adapter speed: 240 kHz
Breakpoint 1 at 0x800019c: file /Users/todi/ebtks/source/main.cpp, line 26.
According to the elf-file this is within the Reset_Handler:
0800023c <FillZerobss>:
800023c: 2300 movs r3, &sharp0
800023e: f842 3b04 str.w r3, [r2], &sharp4
08000242 <LoopFillZerobss>:
8000242: 4b09 ldr r3, [pc, &sharp36] ; (8000268 <LoopFillZerobss+0x26>)
8000244: 429a cmp r2, r3
8000246: f4ff aff9 bcc.w 800023c <FillZerobss>
800024a: f7ff ffb3 bl 80001b4 <SystemInit>
when ever I try to debug the CPU I do not get to main() but end up with a PC of 0x08000242
(gdb) monitor reset
Unable to match requested speed 300 kHz, using 240 kHz
Unable to match requested speed 300 kHz, using 240 kHz
adapter speed: 240 kHz
(gdb) s
Single stepping until exit from function LoopFillZerobss,
which has no line number information.
Note: automatically using hardware breakpoints for read-only addresses.
WARNING! The target is already running. All changes GDB did to registers will be discarded! Waiting for target to halt.
^C
Program received signal SIGINT, Interrupt.
0x08000242 in LoopFillZerobss ()
Is the warning a hint that resetting the CPU isn�t working as expected? Are there any addition setting I would have to set with openocd or gdb?
thanks in advance for any help or pointers,
Torsten
#openocd-gdb-stm32l1
