Newlib, syscall.c and printf

[Hard Maker]

Thank's for your answer Federico,

I try with 8192 bytes of stack and this code and printf not work.

extern unsigned int _HEAP_START;
extern unsigned int _HEAP_END;
int main(void)
{
     char txt[20];
     float fVal = 3.141596;
     setvbuf(stdin, NULL, _IONBF, 0);
     setvbuf(stdout, NULL, _IONBF, 0);
     setvbuf(stderr, NULL, _IONBF, 0);

     InitHW();

     lcd_gotoxy(0,0);
     snprintf(txt, 20, "Start: %X", (unsigned int)&_HEAP_START);
     _write(0, txt, strlen(txt));    // work

     lcd_gotoxy(0,1);
     snprintf(txt, 20, "End:   %X", (unsigned int)&_HEAP_END);
     lcd_print(txt); // work

     lcd_gotoxy(0,2);
     printf("Hi %.2f\n", fVal);    // not work
     fflush(stdout);
     while (1)
         ;
     return 0;
}

Thank's for your answer.

Sergio

El 08/02/2011 11:03 a.m., Federico Terraneo escribió:
> -----BEGIN PGP SIGNED MESSAGE-----
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> On 02/08/2011 02:23 PM, Hard Maker wrote:
>> I'm using 1 KB of system stack and have 60KB free of heap. Anyone has
>> this problem?
>>
> Hi, I'm not a newlib developer, just an user.
> I've been using newlib with stm32 for quite some time, and printf works,
> but takes up nearly 2KB of stack. Maybe the problem is this.
>
>
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