数码管移位显示

#include<reg51.h>
typedef unsigned int u16;
typedef unsigned char u8;
//管脚定义
sbit LSA=P2^2;
sbit LSB=P2^3;
sbit LSC=P2^4;
u8 KeyValue;
u8  keystate;
u8 code smgduan[17]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,
					0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};//显示0~F的值
u8 display[8];
//延时
void delay(u16 i)
{
  while(i--);
}

void juzhen()
{
   u8 a=0;								
   P1=0x0f;
   if(P1!=0x0f)
   {
    
     delay(1);
	 P1=0x0f;
	 if(P1!=0x0f)
	 {	  
	 keystate=1;
      switch(P1)
	  {
	   case 0x07:
	   KeyValue=0;
	   break;
	   case 0x0b:   //00001011
	   KeyValue=1;
	   break;
	   case 0x0d:	  //00001101
	   KeyValue=2;
	   break;
	   case 0x0e:
	   KeyValue=3;
	   break;
	  }
	  P1=0xf0;
      switch(P1)
	  {
	   case 0x70:
	   KeyValue=KeyValue;
	   break;
	   case 0xb0:   //00001011
	   KeyValue=KeyValue+4;
	   break;
	   case 0xd0:	  //00001101
	   KeyValue=KeyValue+8;
	   break;
	   case 0xe0:
	   KeyValue=KeyValue+12;
	   break;
	  }
	  while((a<50)&&(P1=0xf0))	 //检测按键松手检测
			{
				delay(1000);
				a++;
			}	  	  	 
   	 }
	 }
}
void display1()
{
   u8 i;
   for(i=0;i<8;i++)
   {
    switch(i)
	{
	case 0:
	LSA=0;LSB=0;LSC=0;
	break;
	case 1:
	LSA=1;LSB=0;LSC=0;
	break;
	case 2:
	LSA=0;LSB=1;LSC=0;
	break;
	case 3:
	LSA=1;LSB=1;LSC=0;
	break;
	case 4:
	LSA=0;LSB=0;LSC=1;
	break;
	case(5):
	LSA=1;LSB=0;LSC=1;
	break;
	case(6):
	LSA=0;LSB=1;LSC=1;
	break;
	case(7):
	LSA=1;LSB=1;LSC=1;
	break;
	}
    P0=display[i];
	delay(100);
	P0=0x00;
   }
}

void main()
{
  while(1)
  {
	  juzhen();
  if(keystate==1)
  {
   	display[7]=display[6];
	display[6]=display[5];
	display[5]=display[4];
	display[4]=display[3];
	display[3]=display[2];
	display[2]=display[1];
	display[1]=display[0];
	display[0]=smgduan[KeyValue];
	 keystate=0;
  }
    
	 delay(100);
	 display1();
  }
}