51单片机LED的三个基本项目（LED点亮＆LED闪烁＆LED流水灯）（3）

#include <REGX52.H> void Delay1ms(unsigned int xms); //@12.000MHz void main() { while(1) { P2=0xFE;//1111 1110 Delay1ms(1000); P2=0xFD;//1111 1101 Delay1ms(1000); P2=0xFB;//1111 1011 Delay1ms(100); P2=0xF7;//1111 0111 Delay1ms(100); P2=0xEF;//1110 1111 Delay1ms(100); P2=0xDF;//1101 1111 Delay1ms(100); P2=0xBF;//1011 1111 Delay1ms(100); P2=0x7F;//0111 1111 Delay1ms(100); } } void Delay1ms(unsigned int xms) //@12.000MHz { unsigned char i, j; while(xms) { i = 2; j = 239; do { while (--j); } while (--i); xms--; } }