Posted by akis on 2017-07-26 12:19

Thank you bugmenot

To test it I made a new project with only these lines

1. include “stm32f4xx.h”
2. include “stm32f4_discovery.h”

char s200;
int i;

int main(void)
{

i=0;
sprintf(s,”Text :”);

sprintf(s,”Text :%d”,i);

sprintf(s,”Text :”);

for(;;);
}

the first sprintf is executed but the second stops forever.
In the bigger project in which i face the problem the s and i was into the function body and i have change the linker script with heap and stack in 0x2000 but nothing.

Posted by akis on 2017-07-27 07:03

Thank you mazensaad

the code in ide is as below

1. include
2. include “stm32f4xx.h”
3. include “stm32f4_discovery.h”

char s 200 ;
int i;

int main(void)
{
i=0;
sprintf(s,”Text :”);
sprintf(s,”Text :%d”,i);
sprintf(s,”Text :”);
for(;;);
}

but when i press the post button i the char s loses his brackets,
anyway this section was a part of a bigger project and the printout was in a LCD display.
So when i put the sprintf function the program stops only when the sprintf has parameters.
I make a new project only with this code and i have the same results.
Going step by step with the debugger the execution stop in the second sprintf.
Do i must change the _write routine in syscalls.c ? But this is not a printf to make a redirection.

Thank you for your time and best regards
Akis