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      EEPW首頁 > 嵌入式系統(tǒng) > 設(shè)計(jì)應(yīng)用 > 基于單片機(jī)的兩點(diǎn)間溫度控制

      基于單片機(jī)的兩點(diǎn)間溫度控制

      作者: 時(shí)間:2011-09-28 來源:網(wǎng)絡(luò) 收藏
      5.C語言源程序

      本文引用地址:http://www.biyoush.com/article/172468.htm

        #include AT89X52.H>

        unsigned char code dispbitcode[]={0xfe,0xfd,0xfb,0xf7,

        0xef,0xdf,0xbf,0x7f};

        unsigned char code dispcode[]={0x3f,0x06,0x5b,0x4f,0x66,

        0x6d,0x7d,0x07,0x7f,0x6f,0x00};

        unsigned char dispbuf[8]={10,10,10,10,10,10,0,0};

        unsigned char dispcount;

        unsigned char getdata;

        unsigned int temp;

        unsigned char i;

        sbit ST=P3^0;

        sbit OE=P3^1;

        sbit EOC=P3^2;

        sbit CLK=P3^3;

        sbit LED1=P3^6;

        sbit LED2=P3^7;

        sbit SPK=P3^5;

        bit lowflag;

        bit highflag;

        unsigned int cnta;

        unsigned int cntb;

        bit alarmflag;

        void main(void)

        {

        ST=0;

        OE=0;

        TMOD=0x12;

        TH0=0x216;

        TL0=0x216;

        TH1=(65536-500)/256;

        TL1=(65536-500)%256;

        TR1=1;

        TR0=1;

        ET0=1;

        ET1=1;

        EA=1;

        ST=1;

        ST=0;

        while(1)

        {

        if((lowflag==1) (highflag==0))

        {

        LED1=0;

        LED2=1;

        }

        else if((highflag==1) (lowflag==0))

        {

        LED1=1;

        LED2=0;

        }

        else

        {

        LED1=1;

        LED2=1;

        }

        }

        }

        void t0(void) interrupt 1 using 0

        {

        CLK=~CLK;

        }

        void t1(void) interrupt 3 using 0

        {

        TH1=(65536-500)/256;

        TL1=(65536-500)%256;

        if(EOC==1)

        {

        OE=1;

        getdata=P0;

        OE=0;

        temp=getdata*25;

        temp=temp/64;

        i=6;

        dispbuf[0]=10;

        dispbuf[1]=10;

        dispbuf[2]=10;

        dispbuf[3]=10;

        dispbuf[4]=10;

        dispbuf[5]=10;

        dispbuf[6]=0;

        dispbuf[7]=0;

        while(temp/10)

        {

        dispbuf[i]=temp%10;

        temp=temp/10;

        i++;

        }

        dispbuf[i]=temp;

        if(getdata77)

        {

        lowflag=1;

        highflag=0;

        }

        else if(getdata>153)

        {

        lowflag=0;

        highflag=1;

        }

        else

        {

        lowflag=0;

        highflag=0;

        }

        ST=1;

        ST=0;

        }

        P1=dispcode[dispbuf[dispcount]];

        P2=dispbitcode[dispcount];

        dispcount++;

        if(dispcount==8)

        {

        dispcount=0;

        }

        if((lowflag==1) (highflag==0))

        {

        cnta++;

        if(cnta==800)

        {

        cnta=0;

        alarmflag=~alarmflag;

        }

        if(alarmflag==1)

        {

        SPK=~SPK;

        }

        }

        else if((lowflag==0) (highflag==1))

        {

        cntb++;

        if(cntb==400)

        {

        cntb=0;

        alarmflag=~alarmflag;

        }

        if(alarmflag==1)

        {

        SPK=~SPK;

        }

        }

        else

        {

        alarmflag=0;

        cnta=0;

        cntb=0;

        }


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