Re: Newlib, syscall.c and printf

[Hard Maker <hardmaker at gmail dot com>]

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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