#include <reg52.h>
//#include <math.h>
#include <intrins.h>
#define uchar unsigned char
#define TURE 1
#define FALSE 0
int key;
int del;
void Tkey(void);
void led(void);


 /************主  程序*************/
void main(void)
{ 
  void tkey(void);
  void led(void);
  void delay(int);

  
  
  SCON=0x00;
  TI=0; 
  while(TURE)
  {
   Tkey();
   led();
   delay(2000);
  }

}






/********矩鍵查尋鍵值4*4程序******/按鍵為P1.0---P1.7
void Tkey(void)
{
  uchar readkey;//rereadkey;
  uchar x_temp,y_temp;
 

  P1=0x0f;
  x_temp=P1&0x0f;
  if(x_temp==0x0f) goto keyout;
  P1=0xf0;
  y_temp=P1&0xf0;
  readkey=x_temp|y_temp;
  readkey=~readkey;


switch(readkey)
    {
   	 case 0x11:key=0; break;
  	 case 0x21:key=1; break;
	 case 0x41:key=2; break;
	 case 0x81:key=3; break;
	 case 0x12:key=4; break;
	 case 0x22:key=5; break;
	 case 0x42:key=6; break;
	 case 0x82:key=7; break;
	 case 0x14:key=8; break;
	 case 0x24:key=9; break;
	 case 0x44:key=10;break;
	 case 0x84:key=11;break;
	 case 0x18:key=12;break;
	 case 0x28:key=13;break;
	 case 0x48:key=14;break;
	 case 0x88:key=15;break;
	 default:  key=16;break;
    }

keyout:_nop_();
}




/************顯示程序*************/
void led(void)
{uchar code LEDValue[]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90};  //0-9
 uchar data num[6];
 uchar k;
num[0]=0;
num[1]=0;
num[2]=0;
num[3]=0;
num[4]=key/10;
num[5]=key-(key/10)*10;

 for(k=0;k<=5;k++)
 {
   SBUF=LEDValue[num[5-k]];
   while(TI==0);
   TI=0;
 }
}




 
/************延時程序*************/
void delay(del)
{
 for(del;del>0;del--); 
}