Running LED dengan Fungsi INTERUPT Pada Atmega16

Proyek :

Coding dengan CVAVR :

//------------------------------------------------------
//Program rutin interupsi eksternal 0
//------------------------------------------------------

//------------------------------------------------------
//EKLARASI HEADER
//------------------------------------------------------
#include <mega16.h> 
#include <delay.h>   
#include <stdio.h>        

//------------------------------------------------------
//EKLARASI VARIABEL
//------------------------------------------------------
unsigned char dt=0x01;

//------------------------------------------------------
//DEKLARASI SUB RUTIN
//------------------------------------------------------
void InisialisasiINT0(); 

//------------------------------------------------------
//PROGRAM UTAMA
//------------------------------------------------------
void main (void)
{       
    DDRA=0xff;  InisialisasiINT0();   
    #asm ("sei");          
   while(1)     
        {
                PORTA=dt;
                delay_ms(100);
                dt=dt<<1;
                if (dt==0) {dt=0x01;}
        }             
}         

//------------------------------------------------------
//SUB RUTIN INTERUPSI EXTERNAL0
//------------------------------------------------------
interrupt [EXT_INT0] void ext_int0_isr(void)
{
unsigned char rr=0;
while (rr<5)
  {
  PORTA=0x0f;
  delay_ms(5);
  PORTA=0xf0;
  delay_ms(5);
  ++rr;
  }
} 

//------------------------------------------------------
//SUB RUTIN INISIALISASI INTERUPSI EXTERNAL0
//------------------------------------------------------
void InisialisasiINT0 ()   
{             
        GICR|=0x80;  
        MCUCR=0x0C;
        MCUCSR=0x00; 
        GIFR=0x80; 
} 


by : Siagian.P

Reff : Atmel.com

·    Warnock, Ian G., Programmable Controllers. Prentice-Hall, 1988.