shift.c

本文件包含了使用C语言编写单片机的各种入门程序

//---------------------------------
#include <reg51.h>
#include<stdio.h>
 sbit sda=P0^2;
 sbit scl=P0^3;
 int a,number,b,fbit;
 
//code int led[16]={0x11,0xD7,0x32,0x92, /* 0 1 2 3 4 */
                  //0xD4,0x98,0x18,0xD3,0x10,0x90, /* 5 6 7 8 9 */
                  //0x50,0x1C,0x39,0x16,0x38,0x78};/* A B C D E F*/

code int led[40]={0xff,0xff,0xff,0xff,0xff,0xff,0xff,
                  0xff,0xff,0x11,0xd3,0xd3,0x92,
				  0xfe,0x98,0x10,0x98,0xd3,0xd4,
				  0x98,0xd3,0xff,0xff,0xff,0xff,
				  0xff,0xff,0xff,0xff};
//==============================================  

shift(a)

{number=led[a];
 scl=0;
 for(b=0;b<8;b++)
 {fbit=number&0x80;
  if(fbit) sda=1;
  else sda=0;
  scl=1;
  number=number<<1;
  scl=0;
  }
}/*
   工程：右移程序
   创建日期：2006.7.20
   创建者：苏湘瑞
 */
 //=======================
 
 void shift(a);

 int i,y;
 int k1=8,k2=7,k3=6,k4=5,k5=4,k6=3,k7=2,k8=1;


//-------------------------------------
int j;

delay(int i)
{
 int j;
 for(;i>0;i--)
 for(j=0;j<125;j++);
}

//------------------------------------
void main()
{
 for(y=0;y<20;y++)
 {
 shift(k1++);

 shift(k2++);
 
 shift(k3++);

 shift(k4++);

 shift(k5++);
 
 shift(k6++);
 
 shift(k7++);
 
 shift(k8++);
 delay(500);
 }
   
}