#include<AT89X51.h> void delay(unsigned int); void main(void)
{ P1_1=0; /* unset pin # 1*/
P1_2=0; /* unset pin # 2*/
/* bring delay*/
delay(300); P1_1=1; /* set pin # 1*/ P1_2=1; /* set pin # 2*/ /*bring delay*/ delay(300) }
/* define delay function*/ void delay(unsigned int itime) { int i,j; for (i=0;i<itime;i++); for (j=0;j<5000;j++); }