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#include <util/delay.h>
#include <avr/interrupt.h>
#define F_CPU 1000000
uint8_t zmienna;
uint8_t licznik = 0x00;
ISR(INT0_vect)
{
licznik = 0;
PORTA= 0b11101111;
_delay_ms(2);
switch(PINA)
{
case 0b11101111:
PORTB= 0b00000000;
break;
case 0b11101110:
PORTB= 0b00000001;
licznik++;
break;
case 0b11101101:
PORTB= 0b00000101;
licznik++;
break;
case 0b11101011:
PORTB= 0b00001001;
licznik++;
break;
case 0b11100111:
PORTB= 0b00001101;
licznik++;
break;
default:
PORTB= 0b11111111;
break;
}
PORTA= 0b11011111;
_delay_ms(2);
switch(PINA)
{
case 0b11011111:
PORTB= 0b00000000;
break;
case 0b11011110:
PORTB= 0b00000010;
licznik++;
break;
case 0b11011101:
PORTB= 0b00000110;
licznik++;
break;
case 0b11011011:
PORTB= 0b00001010;
licznik++;
break;
case 0b11010111:
PORTB= 0b00001110;
licznik++;
break;
default:
PORTB= 0b11111111;
break;
}
PORTA= 0b10111111;
_delay_ms(2);
switch(PINA)
{
case 0b10111111:
PORTB= 0b00000000;
break;
case 0b10111110:
PORTB= 0b00000011;
licznik++;
break;
case 0b10111101:
PORTB= 0b00000111;
licznik++;
break;
case 0b10111011:
PORTB= 0b00001011;
licznik++;
break;
case 0b10110111:
PORTB= 0b00001111;
licznik++;
break;
default:
PORTB= 0b11111111;
break;
}
PORTA= 0b01111111;
_delay_ms(2);
switch(PINA)
{
case 0b01111111:
PORTB= 0b00000000;
break;
case 0b01111110:
PORTB= 0b00000100;
licznik++;
break;
case 0b01111101:
PORTB= 0b00001000;
licznik++;
break;
case 0b01111011:
PORTB= 0b00001100;
licznik++;
break;
case 0b01110111:
PORTB= 0b00010000;
licznik++;
break;
default:
PORTB= 0b11111111;
break;
}
if(licznik > 1)
{
PORTB= 0b11111111;
}
PORTA = 0b00001111;
}
int main(void)
{
DDRA= 0xF0;
DDRB= 0xFF;
zmienna = MCUCR;
zmienna &= !(1<<ISC00);
zmienna |= (1<<ISC01);
MCUCR = zmienna;
GICR |= (1<<INT0);
sei();
while(1)
{
}
}
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