基于Proteus的51系列单片机设计与仿真

				/******************************************************************************
				                               MAX7219串行驱动LED数码管
				                                   移动显示0到9
				******************************************************************************/
				#include"reg51.h"
				#include"intrins.h"
				#define uchar unsigned char
				#define uint unsigned int
				sbit date=P2^0;
				sbit load=P2^1;
				sbit clk=P2^2;
				uchar bdata bitmsb;
				sbit m7 = bitmsb^7;
				uchar code tab[]={ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
				                   0x7e,0x30,0x6d,0x79,0x33,0x5b,0x5f,0x70,0x7f,0x7b,//0到9
								   0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
								  };//0到9
				uchar x,y,c;
				void send(void)    //送一个字节
				{      
				      uchar count;
				       bitmsb=x;
					       for(count=0;count						        {         if(m7)
						  	   			         {  clk=0;
												    date=1;
													_nop_();
													clk=1;
											     }
										   else	{  clk=0;
										           date=0;
												   _nop_();
											   	   clk=1;
												}
											bitmsb 								 	}
				}
				void wr(void)   
				{     
				         load=0;
				         send();
						 x=y;
						 send();
				         load=1;
				}
				void ready(void)
				{
				          x=0xfb;   //设置扫描限制
						  y=0x07;
						  wr();
						  x=0xf9;   //译码模式
						  y=0x00;
						  wr();
						  x=0xfa;   //亮度调节
						  y=0x0c;
						  wr();
						  x=0xfc;   //关断模式
						  y=0x01;
						  wr();     
				}
				void delay(uint i)
				{
				        for(;i>0;i--);
				}
				void main(void)
				{          
				      uchar i; 
				      uchar  cout=0;
					     ready();  //初始化  
				          c=1;
						  x=1;
					 while(1) 
					{
					for(i=cout;i						    {   
						          y=tab[i];
				                  x=c;
						          wr();
								  c++;//因为X的值已经破坏了  所以要用到C变量来赋值
						     }
				                 delay(40000);//延时
								  c=1;       
				                cout+=1;
							    if(cout==18)
								  cout=0;
				   }	
				}