C51学习 之 LED流水灯

电路图

 

 代码

#include <reg52.h>

void delay(unsigned int value)
{
    while(value--);
}
int main()
{
    P1 = 0xfe;
    while(1) {
        P1 = ~(~P1 << 1);
        delay(100000);
        if (P1 == 0xff) {
            P1 = 0xfe;
        }
     }
    return 0;
}