Proteus_Offline_undone

/*
 * 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>


ISR(INT1_vect){

}


int main(void)
{

    unsigned char x=1;
    unsigned int i=1;
    DDRA = 0xff;
    DDRC = 0xff;
    GICR =(1<<INT1);
    MCUCR = MCUCR | 0b00001100;
    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)
    {
            _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);



    }
}