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

#include <stdarg.h>
#include <ctype.h>
#include <string.h>

#include <compat/deprecated.h>

#define F_CPU	4000000
#define UART_BAUD_RATE      9600      /* 9600 baud */
#define UART_BAUD_SELECT (F_CPU/(UART_BAUD_RATE*16l)-1)

typedef unsigned char  u08;
typedef          char  s08;
typedef unsigned short u16;
typedef          short s16;

/* uart globals */
static volatile u08 *uart_data_ptr;
static volatile u08 uart_counter;

static volatile u08 led;

SIGNAL(SIG_INTERRUPT0)
{
    if (led == 0)
    {   
        led = 1;
        sbi(PORTD, 7);
    }
    else
    {
        led = 0;
        cbi(PORTD, 7);
    }    
}

static void delay(uint16_t us) 
{
    while(us)
    	us--;
}


int main(void)
{
    DDRD = 0x00;
    PORTD = 0x00;

    delay(50000);
    
    led = 0;
    
    MCUCR = ((1<<ISC01)|(1<<ISC00));
    
    enable_external_int(_BV(INT0));

    sei();                 

    while(1)
    {
    } 
}