at89s51을 이용한 발광,수광센서

#include<reg51.h>

sbit buzzer = P2^0;
sbit sinwho = P2^2;

void delay(unsigned int i)
{
 int a;
 for(a=0;a<i;i++);

}

void EXT1_int(void) interrupt 0
{
 
  while(1)
  {
  buzzer = 0;
  delay(130);
  buzzer = 1;
  delay(130);
  }
 
}

 

void EXT1_int1(void) interrupt 2
{
 
  while(1)
  {
  buzzer = 0;
  delay(130);
  buzzer = 1;
  delay(130);
  }

  
    
}

main()
{
 

 TCON = 0x05;
 EA = 1;
 IT1 = 1;
 IT0 = 1;
 EX1 = 1;
 EX0 = 1;  
 buzzer=1;
 while(1);

}