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#include <reg51.h>
#include <intrins.h>

sbit RST   = P2^0;
sbit CLK   = P2^1;
sbit DQ    = P2^2;
sbit TSOR = P2^3;
sbit ALERT =P2^4;
sbit RS    = P2^7;
sbit RW    = P2^6;
sbit EN    = P2^5;
/*------------------------------------------全局變量-------------------------------------------------------*/
static unsigned char temp1,temp2;         //溫度值的整數(shù)部分、小數(shù)部分
static unsigned char pos,posset;           //數(shù)字電位器電位值、設(shè)定值
static unsigned char min,sec;              //分鐘、秒
static unsigned char count;                //Timer0中斷計(jì)數(shù)
static unsigned char minset;               //設(shè)定的分鐘數(shù)
static unsigned char status1,status2; //狀態(tài)標(biāo)志
bit   stop,timeover;     //定時(shí)停止、結(jié)束
static char line0[] ="     00:00      ";
static char line1[] ="   . C         W";

/*-------------------------------------------------------------------------------------------------------------*/
void          InitInterupt();
void          KeyboardDelay();
/*-------------------------------------------LCD驅(qū)動(dòng)函數(shù)------------------------------------------------*/
void          DelayL();
void     DelayS();
void     WriteCommand(unsigned char c);
void     WriteData(unsigned char c);
void     ShowChar(unsigned char pos,unsigned char c);
void     ShowString(unsigned char line,char *ptr);
void     InitLcd();
/*----------------------------------------------鍵盤-程序--------------------------------------------------*/
unsigned char GetKey();
/*---------------------------------------------數(shù)字溫度計(jì)驅(qū)動(dòng)-------------------------------------------*/
void          ChangePos(bit sel,unsigned char pos1,unsigned char pos2);
/*------------------------------------------溫度傳感器驅(qū)動(dòng)----------------------------------------------*/
void          Delay15();
void          Delay60();
void          Delay100ms();
void          Write0TS();
void          Write1TS();
bit           ReadTS();
void          ResetTS();
void          WriteByteTS(unsigned char byte);
unsigned char ReadByteTS();
void          InitTS();
void          GetTempTS();
/*-------------------------------------------------主程序---------------------------------------------------*/
void main (void) {
     char code str1[] =" Hello World! ";
     char code str2[] ="   2002-10-20   ";
unsigned char i;

     SP=0x50;
ALERT=0;                 //報(bào)警燈滅
TSOR=1;                 //1-wire總線釋放

     DelayL();
InitLcd();               //初始化LCD
DelayL();
     ShowString(0,str1);    //啟動(dòng)畫面
     ShowString(1,str2);
for(i=0;i<15;i++)
       Delay100ms();
     InitInterupt();         //初始化中斷設(shè)置

     minset=10;               //缺省定時(shí)10分鐘
     posset=0;                //缺省電位器值0
min=minset;     //初始化數(shù)據(jù)
pos=posset;
sec=0;
     count=0;
     P1=0xF0;
status1=0;
status2=0;
stop=1;
timeover=0;

ChangePos(0,255-pos,255-pos); //設(shè)置電位器

InitTS();                //初始化溫度計(jì)
while(1)      //循環(huán)顯示溫度值
{
       GetTempTS();
    line1[0]=0x20;
    i=temp1;
if(i>39)       //超過40攝氏度，告警燈亮
ALERT=1;
    if(i>99)      //超過100攝氏度，顯示溫度的百位
    {
      line1[0]=0x31;
      i-=100;
       }
       line1[1]=i/10+0x30;     //顯示溫度的十位
    line1[2]=i%10+0x30;    //顯示個(gè)位
    line1[4]=temp2+0x30;   //顯示小數(shù)位
    if(timeover)               //若定時(shí)結(jié)束，則電位器緩慢復(fù)0
    {
         for(;pos>0;pos--)
      {
         ChangePos(0,255-pos,255-pos);
         _nop_();
   _nop_();
      }
   timeover=0;
   posset=0;
    }
       if(pos>posset)       //若按鍵修改電位器位置
    {
      for(;pos>posset;pos--)   //則緩變到設(shè)定值
         {
         ChangePos(0,255-pos,255-pos);
         _nop_();
      _nop_();
      }
      ChangePos(0,255-pos,255-pos);
    }
    else if(pos<posset)
    {
      for(;pos<posset;pos++)
         {
         ChangePos(0,255-pos,255-pos);
         _nop_();
      _nop_();
      }
      ChangePos(0,255-pos,255-pos);
    }
       i=pos;
    line1[9]=0x20;     //顯示電位器等級值
    if(i>99)
    {
      line1[9]=i/100+0x30;
         i=i%100;
    }
       line1[10]=i/10+0x30;
       line1[11]=i%10+0x30;
    ShowString(1,line1);
    line0[5]=min/10+0x30;   //顯示時(shí)間
    line0[6]=min%10+0x30;
       line0[8]=sec/10+0x30;
    line0[9]=sec%10+0x30;
    ShowString(0,line0);
       Delay100ms();
}
}

void InitInterupt()
{
TMOD=0x21;               //初始化中斷設(shè)置
TL1=0xFD;
TH1=0xFD;
PX0=1;
EA=1;
ES=1;
PCON=0;
TR1=1;
SCON=0x50;

TL0=0x00; //定時(shí)0.05m
TH0=0x4C;
ET0=1;

EX0=1;
IT0=1;
}

void KeyboardDelay() //按鍵中斷延時(shí)
{
unsigned char i,j;
i=0x40;
j=0xFF;
while(i--)
while(j--);
}

/*--------------------------------------------中斷處理-----------------------------------------------------*/
Int0_process() interrupt 0 using 0
{
unsigned char key;
unsigned char keycode[]= "TP";
unsigned char step[3]={1,2,5};
EA=0;
key=GetKey();                //獲得按鍵值
switch(key)
{
   case 0:
     stop=!stop;
min=minset;
     sec=0;
     break;
   case 1:
   case 2:
   case 3:
     if(stop)
{
   minset+=step[key-1];
if(minset>60)
    minset=0;
min=minset;
}
     break;
   case 5:
   case 6:
   case 7:
     if(stop)
{
   minset-=step[key-5];
if(minset>60)
    minset=0;
min=minset;
}
     break;
   case 9:
   case 10:
   case 11:
   posset+=step[key-9];
     break;
   case 13:
   case 14:
   case 15:
   posset-=step[key-13];
     break;
   default:
     break;
}
TR0=!stop;
KeyboardDelay();
P1=0xF0;
EA=1;
}

Timer0_process() interrupt 1 using 0
{
EA=0;
TR0=0;
TL0=0x00;
TH0=0x4C;
count++;
if(count==20)      //如果到累計(jì)定時(shí)到達(dá)1s
{
   if(sec==0)       //定時(shí)處理
   {
     if(min==0)      //總定時(shí)到，則置結(jié)束標(biāo)志
    timeover=1;
     else
{
      min--;
      sec=59;
     }
   }
   else
     sec--;
   count=0;
}
TR0=1;
EA=1;
}
/*--------------------------------------LCD驅(qū)動(dòng)子程序--------------------------------------------------*/
void DelayL()
{unsigned char i,j;
i=0xF0;
j=0xFF;
while(i--)
while(j--);
}

void DelayS()
{
unsigned char i;
i=0x1F;
while(i--);
}

void WriteCommand(unsigned char c)
{
DelayS();
EN=0;
RS=0;
RW=0;
_nop_();
EN=1;
P0=c;
EN=0;
}

void WriteData(unsigned char c)
{
DelayS();
EN=0;
RS=1;
RW=0;
_nop_();
EN=1;
P0=c;
EN=0;
RS=0;
}

void ShowChar(unsigned char pos,unsigned char c)
{
unsigned char p;
if(pos>=0x10)
p=pos+0xB0;
else
p=pos+0x80;
WriteCommand(p);
WriteData(c);
}

void ShowString(unsigned char line,char *ptr)
{
unsigned char l,i;
l=line<<4;
for(i=0;i<16;i++)
   ShowChar(l++,*(ptr+i));
}

void InitLcd()
{
DelayL();
WriteCommand(0x38);
WriteCommand(0x38);
WriteCommand(0x06);
WriteCommand(0x0C);
WriteCommand(0x01);
WriteCommand(0x80);
}
/*---------------------------------------------鍵盤子程序-------------------------------------------------*/
unsigned char GetKey()
{
unsigned k,t,i,j;
k=P1;
k=k&0xF0;
i=0;
while((k&0x10)&&i<4)
{
i++;
k=k>>1;
}
k=0x01;
j=0;
while(j<4)
{
    P1=0xFF^k;
_nop_();
    t=P1;
    t=t^0xFF;
    t=t&0xF0;
    if(t)
   break;
    j++;
k=k<<1;
}
k=j*4+i;
return k;
}
/*-----------------------------------------數(shù)字溫度計(jì)驅(qū)動(dòng)子程序--------------------------------------*/
void ChangePos(bit sel,unsigned char pos1,unsigned char pos2)
{ unsigned char i;
     RST=0;
     DQ=0;
     CLK=0;
RST=1;
DQ=sel;
     _nop_();
     CLK=1;
     _nop_();
CLK=0;
     for(i=0;i<8;i++)
{
if(pos1&0x80)
       DQ=1;
else
    DQ=0;
     _nop_();
     CLK=1;
     _nop_();
CLK=0;
pos1=pos1<<1;
}
for(i=0;i<8;i++)
{
if(pos2&0x80)
       DQ=1;
else
    DQ=0;
     _nop_();
     CLK=1;
     _nop_();
     CLK=0;
pos2=pos2<<1;
}
    RST=0;
}

/*------------------------------------------溫度傳感器子程序-------------------------------------------*/
void Delay100ms()              //延時(shí)100ms
{
unsigned char i,j,k;
for(i=0;i<8;i++)
   for(j=0;j<25;j++)
     for(k=0;k<250;k++);
}

void Delay15() //延時(shí)15us
{
unsigned char i;
for(i=0;i<8;i++);
}

void Delay60() //延時(shí)60us
{
unsigned char i;
for(i=0;i<30;i++);
}

void Write0TS()                //寫bit 0
{
     TSOR=1;
     TSOR=0;
Delay15();
Delay15();
Delay15();
Delay15();
     TSOR=1;
_nop_();
_nop_();
}

void Write1TS()                 //寫bit 1
{
     TSOR=1;
     TSOR=0;
     _nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
     TSOR=1;
     _nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
     Delay15();
     Delay15();
     Delay15();
}

bit ReadTS()
{
bit b;
     TSOR=1;
     TSOR=0;
_nop_();
_nop_();
_nop_();
_nop_();
     TSOR=1;
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
     b=TSOR;
     Delay15();
     Delay15();
     Delay15();
_nop_();
_nop_();
return b;
}

void ResetTS() //復(fù)位
{unsigned char i;

   TSOR=1;
   TSOR=0;
   for(i=0;i<8;i++)
     Delay60();
   TSOR=1;
   while(TSOR);
   for(i=0;i<8;i++)
     Delay60();
}

void WriteByteTS(unsigned char byte)   //寫一個(gè)字節(jié)（byte）
{unsigned char i;
for(i=0;i<8;i++)
{
   if(byte&0x01)
     Write1TS();
   else
     Write0TS();
   byte=byte>>1;
}
}

unsigned char ReadByteTS()          //讀一個(gè)字節(jié)（byte）
{
unsigned char i,j;
bit           b;
j=0;
for(i=0;i<8;i++)
{
   b=ReadTS();
   if(b)
     j+=1;
   j=_cror_(j,1);
}
return j;
}

void InitTS()                 //初始化溫度轉(zhuǎn)換
{
     ResetTS();
WriteByteTS(0xCC);
WriteByteTS(0x4E);
WriteByteTS(0x64);
     WriteByteTS(0x8A);
     WriteByteTS(0x1F);
}

void GetTempTS()                //獲取溫度
{
     ResetTS();
WriteByteTS(0xCC);
WriteByteTS(0x44);
Delay100ms();
     ResetTS();
WriteByteTS(0xCC);
   WriteByteTS(0xBE);

temp2=ReadByteTS();
temp1=ReadByteTS();
ReadByteTS();
ReadByteTS();
ReadByteTS();
ReadByteTS();
ReadByteTS();
ReadByteTS();
ReadByteTS();
temp1=temp1<<4;
temp1+=(temp2&0xF0)>>4;
   temp2=(temp2&0x0F)?5:0;
}
液晶顯示溫度計(jì)程序

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51單片機(jī)的液晶顯示溫度計(jì)程序

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