Hi Sophia,
I found out that if I revert to an older version of the project, with less amount of code, and add the same test sprintf there, then it works!
So I tried to successively add more code to that old version until it stopped working.
(Note however that the added code is never executed when there is an exception, since the failing debug sprintf is inserted directly after DAVE_Init in main, so the execution halts there).
I think perhaps this is because some memory segment spills over.
I runned objdump.exe to extract a memory map, but I am not sure exactly how to interpret it...
It seems both firmware/constants and ram are within boundaries, but what about all those .debug segments?
But if memory is exceeded, then why isn't there an error from the linker?
This is what objdump.exe says for the old .elf file that works.
(The debug sprintf has been inserted after DAVE_Init, and here it succeds, i.e. no exception is generated, and the value in the buf variable is 1.0 as expected):
D:\Temp\140528.1ok_pem2_freertos\PEM_FreeRTOS>"C:\Program Files (x86)\DAVE-3.1.1
0\ARM-GCC\arm-none-eabi\bin\objdump.exe" -h Debug\PEM_FreeRTOS.elf
Debug\PEM_FreeRTOS.elf: file format elf32-littlearm
Sections:
Idx Name Size VMA LMA File off Algn
0 .text 00023d34 08000000 08000000 00008000 2**3
CONTENTS, ALLOC, LOAD, READONLY, CODE
1 .ARM.exidx 00000010 08023d34 08023d34 0002bd34 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
2 .rodata 00004b50 08023d44 08023d44 0002bd44 2**3
CONTENTS, ALLOC, LOAD, READONLY, DATA
3 Stack 00000800 20000000 20000000 00038000 2**0
ALLOC
4 .bss 0000d25c 20000800 20000800 00038000 2**2
ALLOC
5 .data 00001194 2000da60 080288a0 00035a60 2**3
CONTENTS, ALLOC, LOAD, DATA
6 .debug_aranges 00002418 00000000 00000000 00036bf8 2**3
CONTENTS, READONLY, DEBUGGING
7 .debug_info 000361e6 00000000 00000000 00039010 2**0
CONTENTS, READONLY, DEBUGGING
8 .debug_abbrev 00007421 00000000 00000000 0006f1f6 2**0
CONTENTS, READONLY, DEBUGGING
9 .debug_line 0005cfd7 00000000 00000000 00076617 2**0
CONTENTS, READONLY, DEBUGGING
10 .debug_frame 0000825c 00000000 00000000 000d35f0 2**2
CONTENTS, READONLY, DEBUGGING
11 .debug_str 000b1406 00000000 00000000 000db84c 2**0
CONTENTS, READONLY, DEBUGGING
12 .debug_loc 0000c3c8 00000000 00000000 0018cc52 2**0
CONTENTS, READONLY, DEBUGGING
13 .debug_ranges 00001ef0 00000000 00000000 00199020 2**3
CONTENTS, READONLY, DEBUGGING
14 .build_attributes 00001bac 00000000 00000000 0019af10 2**0
CONTENTS, READONLY
15 .debug_macro 00014620 00000000 00000000 0019cabc 2**0
CONTENTS, READONLY, DEBUGGING
D:\Temp\140528.1ok_pem2_freertos\PEM_FreeRTOS>
And here when a little more code is added (which is never executed), then I get the bus fault exception from the sprintf call:
D:\Temp\140528.2err_pem2_freertos\PEM_FreeRTOS>"C:\Program Files (x86)\DAVE-3.1.
10\ARM-GCC\arm-none-eabi\bin\objdump.exe" -h Debug\PEM_FreeRTOS.elf
Debug\PEM_FreeRTOS.elf: file format elf32-littlearm
Sections:
Idx Name Size VMA LMA File off Algn
0 .text 00024194 08000000 08000000 00008000 2**3
CONTENTS, ALLOC, LOAD, READONLY, CODE
1 .ARM.exidx 00000010 08024194 08024194 0002c194 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
2 .rodata 000050c8 080241a4 080241a4 0002c1a4 2**3
CONTENTS, ALLOC, LOAD, READONLY, DATA
3 Stack 00000800 20000000 20000000 00038000 2**0
ALLOC
4 .bss 0000d660 20000800 20000800 00038000 2**2
ALLOC
5 .data 00001194 2000de60 08029270 00035e60 2**3
CONTENTS, ALLOC, LOAD, DATA
6 .debug_aranges 00002488 00000000 00000000 00036ff8 2**3
CONTENTS, READONLY, DEBUGGING
7 .debug_info 000369f4 00000000 00000000 00039480 2**0
CONTENTS, READONLY, DEBUGGING
8 .debug_abbrev 00007661 00000000 00000000 0006fe74 2**0
CONTENTS, READONLY, DEBUGGING
9 .debug_line 0006043c 00000000 00000000 000774d5 2**0
CONTENTS, READONLY, DEBUGGING
10 .debug_frame 00008384 00000000 00000000 000d7914 2**2
CONTENTS, READONLY, DEBUGGING
11 .debug_str 000b1554 00000000 00000000 000dfc98 2**0
CONTENTS, READONLY, DEBUGGING
12 .debug_loc 0000c58c 00000000 00000000 001911ec 2**0
CONTENTS, READONLY, DEBUGGING
13 .debug_ranges 00001f40 00000000 00000000 0019d778 2**3
CONTENTS, READONLY, DEBUGGING
14 .build_attributes 00001c1e 00000000 00000000 0019f6b8 2**0
CONTENTS, READONLY
15 .debug_macro 00015385 00000000 00000000 001a12d6 2**0
CONTENTS, READONLY, DEBUGGING
D:\Temp\140528.2err_pem2_freertos\PEM_FreeRTOS>
See also attached zip file with linker and map files.
Thanks for any help or suggestions! (And sorry for the delay in answering...)
/Mikael
