/*  Name     : Main.c
 *  Purpose  : Source code for LEDs Interfacing with ATMEGA16.
 *  Author   : GEMICATES
 *  Date     : 04-07-2017
 *  Website  : www.gemicates.org
 *  Revision : None
 */

#include<avr/io.h>			// Header File for ATMEGA16
#include<util/delay.h>	                // Include Delay Function

#define LEDS PORTA			// To Set Port A as Output
#define L1 PB0				// To Set Port B pin 0 as Output
#define L2 PD7				// To Set Port D pin 7 as Output
#define SW PD0				// To Set Port D pin 0 as Input

                                        // MAIN FUNCTION 
void main()
{
	DDRA =0xff;		        // Set the Data Direction Register A as Ouput
	DDRB =0x01;			// Set the Data Direction Register B Pin 0 as Ouput
	DDRD =0x80;			// Set the Data Direction Register D Pin 7 as Ouput & Pin 0 as Input
	PORTD=0x01;			// Enable the Pullup Resistor for Switch
while(1)				// Infinite loop
  {

	LEDS=0x00;			// Enable the PortA Pins
	PORTB =~(1<<L1);		// Enable the PortB Pin 0
	_delay_ms(500);			// Make Delay
	LEDS=0xff;			// Diable the PortA Pins
	PORTB =(1<<L1);			// Enable the PortB Pin 0
	_delay_ms(500);			// Make Delay


	if (PIND == 1) 			// Check Switch Position
		{
		  PORTD =(1<<L2);	// If Switch is ON LED Connected to the pin PD7 will Enable
		  _delay_ms(500);	// Make Delay
		  PORTD =0;		// Disable the Pin PD7
		  _delay_ms(500);	// Make Delay
		}
  }
}