atmega8 routine: INT1 external interrupt-EEWORLD

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/***********************************************************

* Function library description: ATMEGE8 INT1 interrupt program

* Version: v1.0

************************************************************

*Note: button PD3

* LED PD5

* buzzer PB1

***********************************************************/

#include

int main(void)

{

//PD3 external interrupt 1 port is set as output

DDRD &= ~(1 << DDD3);

//PD3 pull-up resistor enable

PORTD |= (1 << PORTD3);

//Buzzer control port is output

DDRB |= (1 << DDB1);

DDRC |= (1 << DDC5);

//INT1 falling edge trigger

MCUCR |= (1 << ISC10) | (1 << ISC11);

//INT1 interrupt enable

GICR |= (1 << INT1);

// Enable global interrupt

be();

while(1)

{

}

return 0;

}

//External interrupt 1 service routine

SIGNAL(SIG_INTERRUPT1)

{

PORTB ^= (1 << PORTB1);

PORTC ^= (1 << PORTC5);

}

Keywords：atmega8 INT1 Reference address：atmega8 routine: INT1 external interrupt

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