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

unsigned char PROGMEM displayCodes[10] = {0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x00,0x09};

volatile char g_start_stop;
volatile char g_direction;

int main(void)
{
	DDRB = 0xff;  //set the direction to be output
	PORTB = __LPM((int)&displayCodes+8); // load the code needed to display an 8 from program memory

	while(1)
	{
		/*
		// code for debouncing button
		if(g_start_stop == 0xff)
			// value is 1
		else if(g_start_stop == 0x00)
			// value is 0
		else
			// value should remain unchanged from the last value

		if(g_direction == 0xff)
			// value is 1
		else if(g_direction == 0x00)
			// value is 0
		else
			// value should remain unchanged from the last value
		*/
	}

	return 0;

}

SIGNAL(SIG_OUTPUT_COMPARE0)
{
	g_start_stop = (g_start_stop << 1) | (((PIND & (1 << PIND4)) >> PIND4) & 0x1);
	g_direction = (g_direction << 1) | (((PIND & (1 << PIND5)) >> PIND5) & 0x1);
}