跑马灯

从前向后亮

#include <reg52.h>//sbit LED0 = P0^0;void delay(unsigned char i){int j,k;for(j = 0;j < 255;j++)for(k = 0;k < i;k++);}int i;unsigned int temp = 0x00;void main(void){int i;int temp = 0xFF;P0 = 0xFF;while(1){for(i = 0;i < 8;i++){P0 = P0 & ~(0x01 << i);delay(50);P0 = 0XFF;//P0 = P0 & (0xFE << i);}}}