zonghe.c

温度传感器检测程序 温度传感器检测程序 温度传感器检测程序

#include"ht46r24.h"
#pragma vector isr_8 @ 0x8 //中断函数地址
unsigned long int pulse_flag;//定时数，1对应50ms
unsigned long int den,denc,dens;//den一氧化碳浓度denc修正后的一氧化碳浓度
unsigned char temperture;//temperture温度值
unsigned char ad_i;//一氧化碳读取次数
//掩模中开看门狗
//********************CO A/D采集程序***********************************//
unsigned long int set_ad()
   {   unsigned  long int ad_result,k,u; 
          _adcr=0x18;      //PB0,AN0通通 
          _acsr=0x01;      //8分频0.5MHZ
           _start=0;
            _start=1;    
            _start=0;      //启动A/D转换
            while(_eocb); //等待A/D转换完成
            u=_adrh;
            k=_adrl;   
            k>>=6;       
            ad_result=u*4+k;                 
            return(ad_result);        
     } 
//**********************************ds1820程序*****************************************//

//***************ds18B20初始化***************//
void initial_ds18B20()
{   unsigned char presence;
     presence=1;      
      while(presence)
      { 
       _pdc=0; //设pd.0为输出
       _pd0=1; 
       #asm
       nop;
       #endasm
       _pd0=0;          //DQ拉低
       #asm     //延时600us 精确延时大于480us小于960us 
       mov a,100
       mov [0D1h],a
       mov [0D2h],a
       loop:sdz [0D1h]
          jmp loop
          jmp lp
       lp:sdz [0D2h]  //sdz和jmp,3个周期
          jmp lp         
        #endasm    
       _pd0=1;          //拉高后15到60us,若复位成功,DS18B20将产生60到240us低电平.
       #asm      // 延时69us
       mov a,23
       mov [0D1h],a      
       loop1:sdz [0D1h]
       jmp loop1  
        #endasm  
      _pdc=0x01;//设pd.0为输入
        #asm
       nop;
       nop;
       #endasm
        presence=_pd0;// 复位成功                    
       }
      _pdc=0; 
       _pd0 = 1;        
       #asm      //300us 
       mov a,50
       mov [0D1h],a
       mov [0D2h],a
       lp1:sdz [0D1h]
          jmp lp1
          jmp lp2
       lp2:sdz [0D2h]  
          jmp lp2                  
        #endasm   
}
//*********向ds18B20写1个字节数据********//
void write_ds18B20(unsigned char wdata)
{unsigned char i,k;  
    for (i=8; i>0; i--)
   {  _pd0=1;     
      _pdc=0;//设pd.0为输出         
     k=wdata&0x01;
     if(k==0)
     { _pd0=0;  
       #asm       //69us
       mov a,23
       mov [0D1h],a      
       loop3:sdz [0D1h]
          jmp loop3
       #endasm 
       _pd0=1;
      #asm     
      nop;
      nop;
      nop;
      nop;
      nop;
      #endasm
      }
     if(k==1)
     {_pd0=0;
      #asm     
      nop;
      nop;
      nop;
      nop;
      nop;     
      #endasm  
      _pd0=1;
       #asm       //69us
       mov a,23
       mov [0D1h],a      
       loop31:sdz [0D1h]
          jmp loop31
       #endasm        
      }  
     _pdc=0;
     _pd0=1;
      #asm     
      nop;
      nop;
      #endasm
     wdata>>=1;    
    }
 }  
   
//*********从ds18B20读1个字节数据********//
unsigned char read_ds18B20()
{ unsigned char j,i;
  unsigned char dat=0;
  for(i=8;i>0;i--)
   {  
      _pdc=0;//设pd.0为输出  
      _pd0=1;  
      #asm
       nop;
      #endasm
      _pd0= 0; //给脉冲信号
      #asm   //大于1us
      nop;
      nop;
      nop;
      nop;
      nop;
      #endasm
     _pdc=0x01;//设pd.0为输入
       #asm
       nop;
       nop;
       nop;
       nop;
       nop;  
       nop;
       nop;
       nop;
       nop;
       nop; 
       nop;
       nop;
       nop;
       nop;
       nop;     
       #endasm   // 延时15us
      j=_pd0;  
      #asm    //68us
       mov a,23
       mov [0D1h],a      
       loop2:sdz [0D1h]
          jmp loop2
       #endasm    
      dat>>=1;
      j<<=7;
      dat|=j;       
    }
    
      return(dat);
}


//*******读取温度值并转换******//
unsigned char read_temp()
{ unsigned char tvalue;
  unsigned  char a, b;//低、高位温度值
  initial_ds18B20(); //复位
  write_ds18B20(0xcc);//*跳过读序列号*/
  write_ds18B20(0x44);//*启动温度*/
  #asm      //延时大于750mS,取1s 等待转换结束
   mov a,35
   mov [0D1h],a     
   l1:mov a,100
      mov [0D2h],a 
   l2:mov a,100
      mov [0D3h],a     

   l3:sdz [0D3h]
      jmp l3
      jmp l4
   l4:sdz [0D2h]  
      jmp l2
      jmp l5
   l5:sdz [0D1h]
      jmp l1
   #endasm 
  initial_ds18B20();  //复位
  write_ds18B20(0xcc);//*跳过读序列号*/
  write_ds18B20(0xbe);//*读取温度转换*/
  a=read_ds18B20();//读低字节
  b=read_ds18B20();//读高字节 
   //数据处理
  tvalue=(b<<4)|(a>>4);    
  return(tvalue);
}
//********************DS18B20程序结束***********************************//

//***********************显示程序***********************************//
void display(unsigned char m)
{ unsigned char a,b;
   a=m%10;
   b=m/10;
   b=b*16;
   m=a+b;
   _pac=0;
   #asm
   nop;
   nop;
   #endasm
   _pa=m;
   #asm      //延时1s
   mov a,35
   mov [0D1h],a     
   k1:mov a,100
      mov [0D2h],a 
   k2:mov a,100
      mov [0D3h],a     
   k3:sdz [0D3h]
      jmp k3
      jmp k4
   k4:sdz [0D2h]  
      jmp k2
      jmp k5
   k5:sdz [0D1h]
      jmp k1      
      #endasm
}  
 

//********************初始化程序***********************************//
void init()
{ pulse_flag=0;  
  _pac=0;//温度显示
  _pbc=0x01;//pb0一氧化碳输入pb6脉冲输出
  _pcc=0;//pc0~pc2三个颜色不同的信号灯\pc3电扇\pc4蜂鸣器
  _pdc=0x01;//pd0温度输入DS18B20   
}  
//********************延时程序***********************************//
void delay(unsigned char t)
 { while(t)
    {
    #asm      //延时100ms
   mov a,3
   mov [0D1h],a     
   g1:mov a,100
      mov [0D2h],a 
   g2:mov a,100
      mov [0D3h],a     
   g3:sdz [0D3h]
      jmp g3
      jmp g4
   g4:sdz [0D2h]  
      jmp g2
      jmp g5
   g5:sdz [0D1h]
      jmp g1
   #endasm 
      t--;         
     } 
      
 }     
      

  
//******************************脉冲(5S高10S低)程序***************************************//

void isr_8()   // timer/event 0
    {  
     pulse_flag++;        
      if(pulse_flag<=100)//脉冲高
         _pb6=1;
      if(pulse_flag>100&&pulse_flag<=300)//脉冲低
        _pb6=0;
        if(pulse_flag==290)//14.5s测量
       den=set_ad();// CO A/D PB0  */         
     
      if(pulse_flag==300)
        pulse_flag=0;  
            
     }   
                
void set_timer()
      {   _intc0 = 0x5;    //enable timer0
          _tmr0c = 0x82;  //timer0 mode (internal clock) 4分频，1MHZ
          _t0on = 0;    //timer0 disable
          _tmr0l = 0xb0;
          _tmr0h = 0x3c;
          _t0on= 1;    //start timer0        
      }
      
//************************温度修正程序*******************************//  
   void correct_t()
    {   if(temperture<5)
        denc=den*2/5;
        if(temperture>=5&&temperture<15)
         denc=den*2/3;
        if(temperture>=15&&temperture<35)
         denc=den; 
        if(temperture>=35&&temperture<50)
         denc=den*4/3;                
     } 
 //********************报警程序***********************************//
void  cry( unsigned char t)  //t,高警报1,低警报0,pc1红灯,pc0黄灯,蜂鸣器pc4,电风扇pc3
  {  if(t==1)   
     { _pc4=1;
       _pc1=1;
       _pc3=1;
      delay(4); 
       _pc4=0;
       _pc1=0;  
       delay(2);       
      }
  if(t==0)           
      { _pc4=1;
        _pc0=1;
        _pc3=0;
        delay(2);  
         _pc4=0;
         _pc0=0;      
       delay(1); 
      }
  }   
//************************主程序*******************************//
void main()
{ 
  init();//端口初始化 
  _pc=0;  
  ad_i=0; 
  den=0;
  denc=0;
  display(88);//初始显示88
  set_timer();//定时中断    
   while(1)
      {  temperture=read_temp(); //温度值                     
         //display(temperture);           
         if(den!=0)
          { correct_t();
           dens=denc/10;
           display(dens);                            
           if(denc<=800&&denc>500)//控制程序
           cry(0);//黄灯，声光警报
           if(denc<=500)//红灯，声光警报,电风扇
            cry(1);  
           if(denc>800)
           _pc=0;   
          }     
          
       }
 }