#define F_CPU 8000000UL
#include <avr/io.h>
#include <util/delay.h>

#define USART_BAUD_RATE 	9600
#define USART_BAUD_SELECT 	(F_CPU/(USART_BAUD_RATE*16L)-1)

void uart_send(unsigned char);
unsigned char uart_receive(void);
void uart_string(const char *s);

__attribute__((section(".ctors"))) void boot(void)
{	
	UCSRB = (1<<RXEN) | (1<<TXEN);
	UCSRC = (1<<URSEL) | (1<<UCSZ1) | (1<<UCSZ0);
	UBRRL = (unsigned char) USART_BAUD_SELECT;
	
	uart_string("TEST\r\n");

		
    while (1) 
    {

    }
}

void uart_send(unsigned char data)
{
	while (!( UCSRA & (1<<UDRE)));
	UDR = data;
}
unsigned char uart_receive(void)
{
	while (!(UCSRA & (1<<RXC)));
	return UDR;
}
void uart_string(const char *s)
{
	while (*s)
	{
		uart_send(*s);
		s++;
	}
}