#include <avr/io.h>

int main(){
	int pressed=0;
	int data=0b10101010;
	DDRB |=1 << PINB0;
	DDRB &=~(1<< PINB1);
	PORTB |=1 << PINB1;

	int baud = 25;
	UBRRH = (unsigned char)(baud>>8);
	UBRRL = (unsigned char)baud;

	UCSRB = (1<<RXEN)|(1<<TXEN);
	/* Set frame format: 8data, 2stop bit */
	UCSRC = (1<<URSEL)|(1<<USBS)|(3<<UCSZ0);

	while(1){
		if(bit_is_clear(PINB,1)){
			if(pressed==0){
				PORTB |=1 << PINB0;
				while ( !( UCSRA & (1<<UDRE)) );
				UDR = data;
				pressed=1;
				}
		}
		else{
			PORTB &=~(1<<PINB0);
			pressed=0;
		}

	}

}