#include <avr/io.h>
#include <inttypes.h>
#include <avr/interrupt.h>
#include <avr/signal.h>


uint8_t buffer[256];
uint8_t head=0;
uint8_t tail=0;

unsigned char noids[16];
unsigned char noids_index;
unsigned char flop;

char a;
char sel;
char o1;

void usart_putc(unsigned char c) {
   // wait until UDR ready
	//while(!(UCSR0A & (1 << UDRE0)));
	UDR0 = c;    // send character
}


void delay(int del)
{
	int del1, del2, count;
	for(count=0;count<del;count++)
		for(del1=0;del1<20;del1++)
			for(del2=0;del2<1000;del2++)
				;
}

void uart_init()
{
	UCSR0A = (1<<RXC0);
	UCSR0B = (1<<RXEN0) | (1<<TXEN0) | (1<<RXCIE0);
	UCSR0C = (3<<UCSZ00);
	UBRR0H = 0;
	UBRR0L = 12;  //4800 8n1
}2



SIGNAL(SIG_USART_RECV){
	a=UDR0;
	PORTB=a;
	usart_putc(a+1);
}



int
main (void)
{
	uart_init();
	sei();
	DDRB=255;
	DDRC=255;
	DDRD=255;	
	while(1)
	{

	}



   return (0);
}