//數碼管的動態顯示	   16個鍵對應0-F，INTO為退位建
#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
sbit ser=P1^5;
sbit srclk=P1^7;
sbit rclk=P1^4;
sbit delete=P3^2;
sbit beep=P3^4;
uint i,duanum=0,weinum=0,j,t;
uchar duantable[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x00},
	  shuru[]={16,16,16,16,16,16,16,16,16},k,h,
	  weitable[]={0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe};
void delay(uint x)
{
	uint a,b;
	for(a=x;a>0;a--)
		for(b=35;b>0;b--);
}


void display()
{
	uint q;
	if(duanum==8)
		duanum=0;
	if(weinum==8)
		weinum=0;
	h=weitable[weinum];
	for(q=0;q<8;q++)
	{
		srclk=0;
		h=h<<1;
		ser=CY;
		srclk=1;	
	}
	t=shuru[duanum];
	h=duantable[t];
	for(q=0;q<8;q++)
	{
		srclk=0;
		h=h<<1;
		ser=CY;
		srclk=1;
	}
	rclk=0;
	rclk=1;
	duanum++;
	weinum++;
}


void main()
{
	i=0;
	while(1)
	{
		if(i==9)
		{
			i=0;
			for(j=0;j<8;j++)
			{
				shuru[j]=16;
			}

		}
		while(delete==0)
		{
			display();
			beep=0;
			delay(50);
			beep=1;
			display();
			if(i>0)
			{
				i--;
				shuru[i]=16;	
			}
			while(delete==0)
				display();	
		}
		P0=0x7f;
		k=P0&0x7f;
		display();
		while(k!=0x7f)
		{
			beep=0;
			delay(50);
			beep=1;
			display();
			switch(k)
			{
				case 0x77:
				shuru[i++]=15;
				break;
				case 0x7b:
				shuru[i++]=14;
				break;
				case 0x7d:
				shuru[i++]=13;
				break;
				case 0x7e:
				shuru[i++]=12;
				break;	
			}
			P0=0x7f;
			while(P0!=0x7f)
				display();
			break;
		}		
		P0=0xbf;
		k=P0&0xbf;
		display();
		while(k!=0xbf)
		{
			beep=0;
			delay(50);
			beep=1;
			display();
			switch(k)
			{
				case 0xb7:
				shuru[i++]=11;
				break;
				case 0xbb:
				shuru[i++]=10;
				break;
				case 0xbd:
				shuru[i++]=9;
				break;
				case 0xbe:
				shuru[i++]=8;
				break;	
			}
			P0=0xbf;
			while(P0!=0xbf)
				display();
			break;
			
		}
		P0=0xdf;
		k=P0&0xdf;
		display();
		while(k!=0xdf)
		{
			beep=0;
			delay(50);
			beep=1;
			display();
			switch(k)
			{
				case 0xd7:
				shuru[i++]=7;
				break;
				case 0xdb:
				shuru[i++]=6;
				break;
				case 0xdd:
				shuru[i++]=5;
				break;
				case 0xde:
				shuru[i++]=4;
				break;	
			}
			P0=0xdf;
			while(P0!=0xdf)
				display();
			break;
			
		}
		P0=0xef;
		k=P0&0xef;
		display();
		while(k!=0xef)
		{
			beep=0;
			delay(50);
			beep=1;
			display();
			switch(k)
			{
				case 0xe7:
				shuru[i++]=3;
				break;
				case 0xeb:
				shuru[i++]=2;
				break;
				case 0xed:
				shuru[i++]=1;
				break;
				case 0xee:
				shuru[i++]=0;
				break;	
			}
			P0=0xef;
			while(P0!=0xef)
				display();
			break;
			
		}
		if(i==9)
		{
			i=0;
			for(j=0;j<8;j++)
			{
				shuru[j]=16;
			}

		}

	}
}