//In Cerebot2, 4 LEDs (LD1, LD2, LD3, and LD4) are connected to PORTE which are named "user LEDs".
//This program Toggles user LEDs (PORTE) in AVR C Language.
//Use AVR Studio IDE and WinAVR to make the hex file.
//For more information see www.microdigitaled.com and www.digilentinc.com

#include <avr/io.h>
#define F_CPU 8000000L	//In Cerebot2 XTAL = 8 MHz
#include <util/delay.h> //This file provides delay functions

int main ()
{
	DDRE = 0xF0;		//User LEDs are outputs
	
	while (1)
	{
		PORTE = 0x50;		//PORTE = 0101 0000 B (LD1 = ON, LD2 = OFF, LD3 = ON, LD4 = OFF)
		_delay_ms(1000);	//wait 1 second
		PORTE = 0xA0;		//PORTE = 1010 0000 B (LD1 = OFF, LD2 = ON, LD3 = OFF, LD4 = ON)
		_delay_ms(1000);	//wait 1 second
	}
}