#include <REGX52.H>
#include <INTRINS.H>
void Delay500ms() //@11.0592MHz
{
unsigned char i, j, k;_nop_();
i = 4;
j = 129;
k = 119;
do
{
do
{
while (--k);
} while (--j);
} while (--i);
}void()
{
while(1)
{
P2=0xFE;//1111 1110
Delay500ms();
P2=0xFF;
Delay500ms();
}
}