流水灯.c

LED显示,流水灯,定时器,可用于单片机课程设计

#include <reg51.h>
#define uchar unsigned char
void delay(uchar x)
{uchar y;
for(;x>0;--x)for(y=0;y<250;y++){;}}

void main()
{      uchar i=0xfe;   while(1)
{      P1=i;   i<<=1;i++;  
       if(i==0xff)  {P1=0x7e;  delay(250);   P1=0x3c;   delay(250);
                     P1=0x18;  delay(250);   P1=0x50;   delay(250);
                     P1=0xf0;  delay(65000);   P1=0xff;   delay(250);
					 i=0xfe;}
        delay(250);  }}