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

int uart_putc(unsigned char c);
void uart_puts (char *s);

void main(void)
{
	UCR |= (1<<TXEN);
	DDRD  &= 0xFE; // PD0 (RXD) auf Input
    DDRD  |= 0x02; // PD1 (TXD) auf Output

	UBRR = 23;
	
	
	unsigned char uc_test = "Hallo\t";

	uart_puts(uc_test);
}

int uart_putc(unsigned char c)
{
    while(!(USR & (1 << UDRE)));
    UDR = c;                     
    return 0;
}

void uart_puts (char *s)
{
    while (*s)
    {   
        uart_putc(*s);
        s++;
    }
}