[avr-gcc-list] printf not working, i'm linking the libs

[Carlos Becker]

Hi all..
I have a problem with printf. It's not working.. maybe it's the simulator 
(proteus ISIS) but I don't know.. fputc() works perfectly, but for instance 
fputs() doesn't.. I believe it's because fputs uses a char* and I don't know 
where the strings are being stored..

Here is the program.. oh, and i'm linking with minimalistic printf support. I'm 
using atmega8

#include <stdio.h>
#include <avr/io.h>
#include <avr/pgmspace.h>

int     USART_putc(char c)
{
        loop_until_bit_is_set(UCSRA, UDRE);
        UDR = c;
        return 0;
}

int USART_getc(void)
{
        while( !(UCSRA & (1<<RXC)) );   //wait for char
        
        return  (int)UDR;
}

FILE*   USART_init(void)
{
        UBRRH = 0;              // 4800 bps @ 1MHz
        UBRRL = 12;
        
        UCSRB = (1<<RXEN) | (1<<TXEN);
        
        UCSRC = (1<<URSEL) | (3<<UCSZ0);
        
        return  fdevopen(&USART_putc,&USART_getc,0);
}

int main(void)
{
        unsigned char i;
        FILE* USART_stream = USART_init();
        fprintf(USART_stream,"sarasasa"));                      // THIS DOESN'T 
work.. all that's sent is 0xFF and a leading 0x00
        fputc('b',USART_stream);        // this works perfectly
        
        for (;;);
        
        return 0;
}



thanks 
carlos

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