Điều khiển 2 led dùng ngắt

Code:

#include <REGX52.H>
sbit Led_vang=P1^0;
sbit Led_do=P1^2;
void delay_ms(unsigned int ms)
{
unsigned int x,y;
for(x=0;x<ms;x++)
for(y=0;y<=125;y++);
}
void timer_0(void) interrupt 1
{
int i;
Led_vang=0;
for(i=0;i<=20;i++)
{
Led_do=~Led_do;
delay_ms(100);
}
}
void main()
{
//set interrupt
EA=1;//enable interrupt gobal
IT0=1;
IE=0x81;
while(1)
{
Led_do=0;
Led_vang =~Led_vang;
delay_ms(100);

}
}