流水灯.c

这是用51单片机开发的流水灯程序

#include<reg52.h>
#define uint unsigned int 
#define uchar unsigned char
void delay(uint z)
{
   uint x,y;
   for(x=z;x>0;x--)
     for(y=120;y>0;y--);
}
main()
{
   uchar Ledindex=0;
   bit Leddirection=1;
   while(1)
   {
      if(Leddirection)
	     P2=~(0x01<<Ledindex);
	  else
	     P2=~(0x80>>Ledindex);
		 if(Ledindex==7)
		   Leddirection=!Leddirection;
		 Ledindex=(Ledindex+1)%8;
		 delay(200);
   }
}