shuidi.c

这是用51单片机开发的流水灯程序

#include<reg52.h>
#include<intrins.h>//intrinsic内在的
#define uchar unsigned char
#define uint  unsigned int
uint dropdown_flag;
void mian()//水滴方案
{
  static uchar s_dropdownCounter=0,s_dropdown_i=7,s_dropdown_Overcounter;
  uchar rest;
  if(dropdown_flag==1) /*判断100ms是否到*/
  {
    dropdown_flag=0;
     rest=s_dropdownCounter%8;
     P2=~(0x01<<rest)&(0xff>>(7-s_dropdown_i));
     if(s_dropdownCounter>=(8-s_dropdown_i)*7)
     {
         s_dropdownCounter+=8-s_dropdown_i;
         s_dropdown_i--;
         if(s_dropdown_i==0)
         {
           s_dropdown_i=7;
           s_dropdownCounter=0;
         }
      }
   }
}
void stimer(uchar tr)
{ 
 
 TMOD=0x01;//设置为T0以方式1
 TH0=(65536-50000)/256;
 TL0=(65536-50000)%256;//定时50ms
 EA=1;
 ET0=1;
 TR0=tr;  
}
void timer() interrupt 1
{
 dropdown_flag=1;
}