单片机课设：数字温度计C语言程序

 #include<reg51.h>
#include<math.h> 
#define uchar   unsigned  char  
sbit STAR=P2^4;  
sbit EOC=P2^6;   
sbit CLOCK=P2^5; 
sbit OE =P2^7; 
sbit P20=P2^0;
sbit P21=P2^1; 
sbit P22=P2^2; 
sbit P23=P2^3; 
uchar  getdata; 
double change;
 long int temp;
uchar  dispbuf[6]; 
uchar code table1[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x40};//无小数点 "0~9","-"
uchar code table2[]={0xbf,0x86,0xdb,0xcf,0xe6,0xed,0xfd,0x87,0xff,0xef};  //带小数点"0~9";
//uchar code a1[]={"What is the temperature?#"};
//uchar code a2[]={"The Temperature is #"};
/***************定时器初始化程序***********/
void TimeInitial() 
{   
  TMOD=0x10;  //定时器1选择2^16
  TH1=(65536-200)/256;  //赋初值，定时0.2毫秒
  TL1=(65536-200)%256; 
  EA=1;    //开中断允许
   ET1=1; 
  TR1=1;  //开定时器1
 }
 /*************延时程序****************/