[原创]刚写的程序，提下建议

/*************************************/

/*功能：温度检测，温度调节，自动控温*/

/***********************************/

/*********    IR_T.c    ***********/

#include<reg52.h>

#define uint unsigned int

#define uchar unsigned char

sbit RS    = P1^0;                 //1602数据，命令端

sbit RW    = P1^1;                //读写端

sbit E     = P1^2;                 //使能端

sbit DS    = P1^4;                 //DS18B20

sbit Hot   = P2^0;                  //加热

sbit Feng  = P2^7;                  //风扇降温

sbit Light = P3^1;

sbit IR    = P3^2;                  //红外

sbit Alarm = P1^3;                   //报警

uchar table[4];                          //存储解码数据

uchar flag = 0;

uchar   n  = 1;

uchar   t  = 0;

#include "DS18B20.h"            //DS18B20温度转化

#include "1602_display.h"       //1602显示

#include "IR.h"                        //红外线

void Init()

{

       TMOD = 0x11;

       TH1 = (65536 - 1500) / 256;

       TL1 = (65536 - 1500) % 256;

       TR1 = 0;

       ET1 = 1;

       TH0 = 0x00;

       TL0 = 0x00;

       TR0 = 0;

       ET0 = 1;

       EA = 1;

       Hot = 0;

       Init_1602();                                     //1602初始化

}

void main ()

{

       Init();

       while (1)

       {

              Decode();                   //红外线解码

              Light = 1;

       }

}

void time1() interrupt 3

{

       TH1 = (65536 - 1500) / 256;

       TL1 = (65536 - 1500) % 256;

       t++;

       if (t >= 10)

       {

              t = 0;

              Write_tem(DS_average());//温度显示

              Control();

       }           

}

/*************************************/

/******功能：1602液晶控制函数*********/

/*******  1602_display.h  ************/

/*************************************/

uchar code table0[] = {"Range:25.0-090.0"};

uchar code table1[] = {"tempe:"};

void delay(uchar z)

{

       uchar x = 0;

       uchar y = 0;

       for (x=z; x>0; x--)

              for (y=110; y>0; y--);

}

bit Test()                                          //检忙

{

       bit STA7 = 0;

       RS = 0;

       RW = 1;

       E  = 1;

       STA7 = (bit)(P0&0x80);

       delay(5);

       E  = 0;

       return STA7;

}

void Write_order(uchar order) //写指令

{

       while (Test());                           //不忙检测

       RS = 0;

       RW = 0;

       P0 = order;

       delay(5);

       E = 1;

       delay(5);

       E = 0;

}

void Write_data(uchar dat)             //写数据

{

       while (Test());                           //不忙检测

       RS = 1;

       RW = 0;

       P0 = dat;

       delay(5);

       E = 1;

       delay(5);

       E = 0;

}

uchar Read_order()                         //读指令

{

       uchar order = 0;

       while (Test());                           //不忙检测

       P0 = 0xff;

       RS = 0;

       RW = 1;

       delay(5);

       E = 1;

       delay(5);

       order = P0;

       E = 0;

       return order;

}

uchar Read_data()                          //读数据

{

       uchar dat = 0;

       while (Test());                           //不忙检测

       RS = 1;

       RW = 1;

       delay(5);

       E = 1;

       delay(5);

       dat = P0;

       E = 0;

       return dat;

}

void Init_1602()

{

       uchar i = 0;

       Write_order(0x38);

       Write_order(0x0f);

       Write_order(0x80);                  //地址

       i = 0;

       while (table0 != '\0')

/*************************************/

/*******功能：DS128B20温度读取*******/

/********    DS18B20.h   ***********/

/**********************************/

void delayms(uchar x)

{

       while (x--);                 //x=0,14.11us,x=1,20.62us,x=n,14.11+6.51n us

}

uchar Init_DS()

{

       uchar x = 0;

       DS = 1;

       delayms(0);

       DS = 0;

       delayms(110);                    //730us

       DS = 1;

       delayms(6);                //50us

       x = DS;

       delayms(67);                     //480us

       DS = 1;

       return x;

}

void Write_data_DS(uchar dat)

{

       uchar i = 0;

       for (i=0; i<8; i++)

       {

              DS = 0;

              DS = dat&0x01;        //送低位

              delayms(5);         //45us

              DS = 1;

              dat >>= 1;

       }    

}

uchar Read_data_DS()

{

       uchar i = 0;

       uchar dat = 0;

       for (i=0;i<8;i++)

       {

              DS = 0;

              dat >>= 1;

              DS = 1;

              delayms(0);                //4us

              if (DS)

                     dat=dat|0x80;

              delayms(1);

       }

       return dat;

}

float Get_DS()

{

       float temp = 0;

       while (Init_DS());

       Write_data_DS(0xcc);

       Write_data_DS(0x44);

       delayms(120);                   //800us

       while (Init_DS());

       Write_data_DS(0xcc);

       Write_data_DS(0xbe);

       temp = Read_data_DS();

       temp = (Read_data_DS() << 8)|(uint)temp;

       temp = temp * 0.0625 + 0.005;

       return temp;

}

float DS_average()                   //十次平均温度值

{

       uchar i = 0;

       float temp = 0;

       for (i=10; i>0; i--)

       {

              temp = temp + Get_DS();

       }

       temp = temp / 10.0;

       return temp;

}

/*************************************/

/******功能：红外控制解码************/

/*******      IR.h     *************/

/**********************************/

void Function(uchar num)                            //红外控制

{

       switch (num)

       {

              case 11:EA = 0;                               //设定范围

                            Alarm = 1;                         //关警报

                            n = 1;                                 //游标定位

                            Write_order(0x86);

                            Write_order(0x0f);

                            flag = 1;

                            break;

              case 12:Write_order(0x0c);             //确定

                            flag = 0;

                            EA=1;

                            break;

       }

       if (flag == 1)

       {

              switch (num)

              {

                     case 15:Write_order(0x86+n);//光标右移

                                   n++;      

                                   if (n == 2)

                                   n = 3;

                                   if (n == 4)

                                   n = 5;

                                   if (n == 8)

                                   n = 9;

                                   if (n == 10)

                                   n = 0;                  

                                   break;

                     case 14:if (n <= 1)                    //光标左移

                                   n = 11;

                                   if(n == 10)

                                   n = 9;

                                   if (n == 6)

                                   n = 5;

                                   if (n == 4)

                                   n = 3;

                                   Write_order(0x86+n-2);

                                   n--; 

                                   break;

                     case 0: case 1: case 2:        //数字0—9

                     case 3: case 4: case 5:

                     case 6: case 7: case 8:

                     case 9:  

                                   Write_data(0x30+num);

                                   Write_order(0x86+n);

                                   n++;

                                   if (n == 2)

                                   n = 3;

                                   if (n == 4)

                                   n = 5;

                                   if (n == 8)

                                   n = 9;

                                   if (n == 10)

                                   n = 0;           

                                   break;

              }

       }

}

void Decode()                                               //解码

{

       uchar i = 0;

       uchar j = 0;

       uchar temp = 0;

       uint hightime = 0;

       uint lowtime = 0;

       uchar num = 0;

       TH0 = 0x00;

       TL0 = 0x00;

       TR0 = 1;

       while (IR == 0);

       TR0 = 0;

       lowtime = TH0 * 256 + TL0;

       TH0 = 0x00;

       TL0 = 0x00;

       TR0 = 1;

       while (IR == 1);

       TR0 = 0;

       hightime = TH0 * 256 + TL0;

       if (hightime > 3600 && hightime < 4600

              && lowtime > 7800 && lowtime < 8800)//引导吗

       {    

              for (i=0; i<4; i++)

              {

                     for (j=0; j<8; j++)

                     {

                            temp >>= 1;

                            TH0 = 0;

                            TL0 = 0;

                            TR0 = 1;

                            while (IR == 0);

                            TR0 = 0;

                            lowtime = TH0 * 256 + TL0;

                            TH0 = 0;

                            TL0 = 0;

                            TR0 = 1;

                            while (IR == 1);

                            TR0 = 0;

                            hightime = TH0 * 256 + TL0;

                            if (lowtime > 370 && lowtime < 640)

                            {

                                   if (hightime > 420 && hightime < 640)//0

                                   {

                                          temp = temp&0x7f;

                                   }

                                   if (hightime > 1250 && hightime < 1850)//1

                                   {

                                          temp = temp|0x80;

                                   }

                            }           

                     }

              table = temp;

你能帮我解释一下关于定时计数器的意义吗