/*
 * CharacterPrint_H_Offline_1.c
 *
 * Created: 4/13/2021 12:22:55 PM
 * Author : ASUS
 */

#define F_CPU 4000000UL

#include <avr/io.h>
#include <util/delay.h>

unsigned char flag = 0;


ISR(INT1_vect){
	if (flag==0)
	{
		flag = 1;
	}
	else{
		flag = 0;
	}
}


int main(void)
{

	unsigned char x=1;
	unsigned int i=1;
	DDRA = 0xff;
	DDRC = 0xff;
	DDRB = 0b00000001;
	GICR =(1<<INT1);
	MCUCR = MCUCR | 0b00001100;
	sei();
	int val_1 = 1;
	int val_2 = 2;
	int val_3 = 4;
	int val_4 = 8;


	PORTA =  0b00000001;
    /* Replace with your application code */
    while (1)
    {
		PORTB = flag;
		if(flag==1){
			_delay_ms(22);
			val_1 =  val_1 << i;
			PORTA = val_1;
			if(PORTA == 0b00000000){
				val_1 = 1;
				PORTA = val_1;
			}
			PORTC = ~(0b01111100);
			_delay_ms(22);
			val_2 =  val_2 << i;
			PORTA = val_2;
			if(PORTA == 0b00000000){
				val_2 = 1;
				PORTA = val_2;
			}
			PORTC = ~(0b00010000);

			_delay_ms(22);
			val_3 =  val_3 << i;
			PORTA = val_3;
			if(PORTA == 0b00000000){
				val_3 = 1;
				PORTA = val_3;
			}
			PORTC = ~(0b00010000);

			_delay_ms(22);
			val_4 =  val_4 << i;
			PORTA = val_4;
			if(PORTA == 0b00000000){
				val_4 = 1;
				PORTA = val_4;
			}
			PORTC = ~(0b01111100);
		}
		else{
			_delay_ms(1);
			PORTA = val_1;
			PORTC = ~(0b01111100);
			_delay_ms(1);
			PORTA = val_2;
			PORTC = ~(0b00010000);

			_delay_ms(1);
			PORTA = val_3;
			PORTC = ~(0b00010000);

			_delay_ms(1);
			PORTA = val_4;
			PORTC = ~(0b01111100);
		}




	}
}