寒假笔记1.4流水灯的实现

#include<reg52.h>
sbit LED = P0^0;
sbit P20 = P2^0;
sbit P21= P2^1;
sbit P22 = P2^2;
sbit P23 = P2^3;
sbit ENLED = P1^1;
void main()
{
unsigned int i = 0;
unsigned char cnt = 0;

ENLED = 0;
P23 = 1;
P22 = 1;
P21 = 1;
P20 = 0;

while(1)
{
P0 = ~(0x01 << cnt);
for(i=0; i<35000; i++);
cnt++;
if(cnt >=8)
{
      cnt = 0;
}

}