Код

#include <tiny13.h>

// External Interrupt 0 service routine
interrupt [EXT_INT0] void ext_int0_isr(void)
{
// Place your code here
PORTB.4=~PORTB.4;
PORTB.2=~PORTB.2;
PORTB.3=~PORTB.3;

}

// Declare your global variables here

void main(void)
{
// Declare your local variables here

// Crystal Oscillator division factor: 1
#pragma optsize-
CLKPR=0x80;
CLKPR=0x00;
#ifdef _OPTIMIZE_SIZE_
#pragma optsize+
#endif

// Input/Output Ports initialization
// Port B initialization
// Func5=In Func4=Out Func3=Out Func2=Out Func1=In Func0=In
// State5=T State4=0 State3=1 State2=0 State1=P State0=P
PORTB=0x2B;
DDRB=0x1C;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=0xFF
// OC0A output: Disconnected
// OC0B output: Disconnected
TCCR0A=0x00;
TCCR0B=0x00;
TCNT0=0x00;
OCR0A=0x00;
OCR0B=0x00;

// External Interrupt(s) initialization
// INT0: On
// INT0 Mode: Falling Edge
// Interrupt on any change on pins PCINT0-5: Off
GIMSK=0x40;
MCUCR=0x02;
GIFR=0x40;

// Timer/Counter 0 Interrupt(s) initialization
TIMSK0=0x00;

// Analog Comparator initialization
// Analog Comparator: Off
ACSR=0x80;
ADCSRB=0x00;
DIDR0=0x00;

// ADC initialization
// ADC disabled
ADCSRA=0x00;

// Global enable interrupts
#asm("sei")

while (1)
      {
      // Place your code here

      }
}