SD132 NRF52 gcc debugging

[Martin]

Hi

I'm trying to port my firmware to the NRF52 DK, but I'm having trouble getting it to work. Could you give me a hint based on the stack trace below, what the problem might be?

Thread #1 <main> (Suspended : Signal : SIGTRAP:Trace/breakpoint trap)	
	0x20001248	
	<signal handler called>() at 0xfffffff9	
	0xf5bbf576	
	0x1000000	

I'm using

• SEGGER J-Link GDB Server V5.12g
• gcc 5.4 q2
• Eclipse Mars

Everything works fine for the NRF51 DK... This is driving me crazy..

Thanks for your hints in advance!

[butch]

Can't you compile with debug symbols built into the object file (CFLAGS += -DDEBUG) so gdb can print out a readable trace? Even if you could determine which handler was called (at ...ffff9) , with debug symbols compiled in the trace would tell you the name of the last function called etc.

[Martin]

Hi

these are all my defines, some of them are project specific:

-DNRF52 
-D__HEAP_SIZE=0 
-D__VERSION_STR__=\"1.0.0.31\" 
-DSOFTDEVICE_PRESENT 
-DBOARD_PCA10040 
-DNRF52_PAN_12 
-DNRF52_PAN_15 
-DNRF52_PAN_58 
-DNRF52_PAN_55 
-DNRF52_PAN_54 
-DNRF52_PAN_31 
-DNRF52_PAN_30 
-DNRF52_PAN_51 
-DNRF52_PAN_36 
-DNRF52_PAN_53 
-DNRF_LOG_USES_RTT=1 
-DS132 
-DCONFIG_GPIO_AS_PINRESET 
-DBLE_STACK_SUPPORT_REQD 
-DSWI_DISABLE0 
-DNRF52_PAN_20 
-DNRF52_PAN_64 
-DNRF52_PAN_62 
-DNRF52_PAN_63 
-mcpu=cortex-m4 
-mthumb 
-mabi=aapcs 
--std=gnu99 
-mfloat-abi=hard 
-mfpu=fpv4-sp-d16 
-ffunction-sections 
-fdata-sections 
-fno-strict-aliasing 
-fno-builtin 
--short-enums  
-DBSP_DEFINES_ONLY 
-DREEDSWITCH 
-DUSE_EEPROM=1 
-DESB 
-DNRF_ESB_MAX_PAYLOAD_LENGTH=128 
-Wall -Werror -O0 -g3
-DDEBUG

But still no symbols - this is really puzzling me, as it works nice with the NRF51...

[Vidar Berg]

Looks like the sigtrap is occurring in the softdevice, hence no debug symbols. Please include the core register values in your description. You can do that from Eclipse, or call nrfjprog --readregs -f nrf52. Also which version of the SD are using?

[Martin]

Upfront: I'm using SD132 V3. I paste the registers later. Hope this might help already.

[Martin]

These are my ld-file settings:

MEMORY
    {
      FLASH (rx) : ORIGIN = 0x1f000, LENGTH = 0x61000
      RAM (rwx) :  ORIGIN = 0x20002080, LENGTH = 0xdf80
    }

The output of nrfjprog readregs is

R0:   0x0001E0D1
R1:   0x20001248
R2:   0x00002000
R3:   0x00000000
R4:   0x10001000
R5:   0x00000000
R6:   0x00000000
R7:   0x0001E0D1
R8:   0x00000000
R9:   0x00000000
R10:  0x00000000
R11:  0x00000000
R12:  0x00000000
SP:   0x20001230
LR:   0xFFFFFFF9
PC:   0x20001248
xPSR: 0x61000003
MSP:  0x20001230
PSP:  0x00000000

Meanwhile I also tried to compile with gcc 4.9 and 5.2 without success. The symptoms stay the same... :-(