ATtiny2313 + USART = am verzweifeln :-(

[Relaxxo]

schreib anstatt: UCSRC = (1<<USBS)|(3<<UCSZ0);
UCSRB = (1 << TXEN);

dies: UCSRC |= (1<<USBS)|(3<<UCSZ0);
UCSRB |= (1 << TXEN);