电加热炉温度控制系统设计

}

while ((sda==1)&&(i<255))i++; scl=0; flash();

////////从24c02的地址address中读取一个字节数据///// uchar x24c02_read(uchar address) { }

//////向24c02的address地址中写入一字节数据info///// void x24c02_write(uchar address,uchar info) { }

/***************定时器t0初始化*******************/ void init_timer0(void)

EA=0; start(); writex(0xa0); clock(); writex(address); clock(); writex(info); clock(); stop(); EA=1; delay1(50); uchar i; start(); writex(0xa0); clock(); writex(address); clock(); start(); writex(0xa1); clock(); i=readx(); stop(); delay1(10); return(i);

24

{

TMOD=0x01; //time0为定时器，方式1 TH0=0x3c; //预置计数初值 TL0=0xb0; EA=1;

ET0=1; TR0=1; }

/***********定时器t0中断子函数**************/

void timer0(void) interrupt 1 using 0 //定时器0方式1，50ms中断一次 {

TH0=0x3c; TL0=0xb0; mstcnt++;

if(mstcnt>=20 ) {seconde++; write=1; mstcnt=0; } }

/***********the main funtion*************/ void main(void) {

P1=0xff; //初始化p1口，全设为1

x24c02_init(); //初始化24C02 seconde=x24c02_read(4); minite=x24c02_read(6); hour=x24c02_read(8); delay_LCM(500); init_timer0( );

//延时500ms启动 //时钟定时器0初始化

initLCM( ); //LCD初始化

K=x24c02_read(2); //读出保存的数据赋于K

if(seconde>=60) {minite++; seconde=0;} if(minite>=60 ) {hour++; minite=0; } if(hour>=24 ) {hour=0;}

keyscan( ); //按键扫描

Init_DS18B20( ) ; //DS18B20初始化

DisplayListChar(0,0,str0); DisplayListChar(0,1,str1);

while (1) {

25

keyscan(); //按键扫描 ReadTemperature(); //温度采集 }

switch(set) //LCD根据工作模式显示

{

case 0:displayfun1();delay_LCM(1000);break; //正常工作显示 case 1:displayfun2();delay_LCM(1000);break; //调整时显示 case 2:displayfun3();delay_LCM(1000);break; //调整分显示 case 3:displayfun4();delay_LCM(1000);break; //温度设定 default:break;

}

keyscan( ); //相当于延时 if(ON_OFF==1) { }

else{outflag=0;OUT=1;}

if(write==1) //判断计时器是否计时一秒

if(temp1>=K+1){outflag=1;OUT=0;} if(temp1

delay_LCM(1000);

if(temp1

//若温控标志位1， 控制LAMP动作

{

write=0; //清零

delay_LCM(11);

x24c02_write(6,minite); delay_LCM(11);

x24c02_write(4,seconde); x24c02_write(2,K); }

x24c02_write(8,hour); //在24c02的地址2中写入数据hour

delay_LCM(11);

}

26