topic Re: use sprintf on S32 Power Studio in S32 Design Studio

use sprintf on S32 Power Studio

helferog — Mon, 15 Jan 2018 09:12:34 GMT

Hay everybody,

I am working with the S32 Studio on a S32R274 Processor.

I have the issue that sprintf is not working properly and saw that there are already many (old) threads about this.

In one of them a relation between the sbrk function an the sprintf was mentioned. This seems important to me, as I was facing the following error:

C:/NXP/S32DS_Power_v2017.R1/Cross_Tools/powerpc-eabivle-4_9/powerpc-eabivle/newlib/lib/e200z4/fp\libnosys.a(sbrk.o): In function `sbrk':
sbrk.c:(.text.sbrk+0x10): undefined reference to `end'
sbrk.c:(.text.sbrk+0x16): undefined reference to `end'
collect2.exe: error: ld returned 1 exit status

and solved it by changing the sections.ld file to:

/* Core 0 stack */
.c0_stack_and_heap (NOLOAD) : ALIGN(16)
{
__HEAP = . ;
. += __C0_HEAP_SIZE ;
PROVIDE (_end = . );
PROVIDE (end = . );
__HEAP_END = . ;

_stack_end = . ;
. += __C0_STACK_SIZE ;
_stack_addr = . ;
__SP_INIT = . ;
} > c0_stack_and_heap

Building the Project worked great, but I faced IVOR1 errors during runtime.

I found, that:

char str[80];
char test_str_1[] = "test_1";

char test_str_2[] = "test_2";

int test1 = 1;

int test2 = 2;

sprintf(str, "%s", test_str_1);

worked for every library, but:

sprintf(str, "%02i%02i", test1, test2);

only worked with the "newlib_nano no I/O" library, whereas:

sprintf(str, "%s%s", test_str_1, test_str_2);

Did not work for any library.

Do you have any idea, why sprintf is not working?

Thanks and best regards,

Roger

Re: use sprintf on S32 Power Studio

jiri_kral — Mon, 15 Jan 2018 12:51:47 GMT

Hi Roger,

I created new test project for your issue - but I can't reproduce it. The test project is in attachment. In my opinion is your issue related to some dynamic memory allocation - not to sprintf itself. It is possible share your project?

Jiri

Re: use sprintf on S32 Power Studio

helferog — Mon, 15 Jan 2018 15:35:17 GMT

Hi Jiri,

Thanks for your fast response and the test project, it helped me to solve the problem.

Also at my S32 Studio your test project worked well, so I compared all settings and ended up that the projects mainly differ in the chosen library. I did not use test the ewl_c library because i had build errors with the "abs" function. So i changed all my abs(x) calls to (int)fabs((double)x) ones, which worked, because fabs is in the math.h library.

Afterwards building was possible and also the sprintf command worked.

Best regards,

Roger