//基于单片机的化学反应罐温度控制系统C语言代码/*端口分配P0连接8255A数据端口P10(A),1(B),2(C),3(D)4(1)5(2),6(3),7()P20(RD),1(WR),2(A0),3(A1)4(ADC_A)5(ADC_B),6(ALE),7(ST)P30(EOC),1(ADC_OE),2(INT0),3()4(b)5(E),6(RS),7(RW)8255APA(接ADC)PB(接LCD)PC0(out1)1(out2)2()3()4()5()6()7()out1接散热器继电器，out2加热器继电器*/#include
#include#include"absacc.h"//调用_nop_()；延时函数用#defineucharunsignedchar#defineuintunsignedint#defineCOMXBYTE[0x7FFF]//8255A控制口地址#definePAXBYTE[0x7CFF]//8255AA口地址#definePBXBYTE[0x7DFF]//8255AB口地址#definePCXBYTE[0x7EFF]//8255AC口地址sbitH1=P1^0;sbitH2=P1^1;sbitH3=P1^2;sbitH4=P1^3;sbitL1=P1^4;sbitL2=P1^5;sbitL3=P1^6;sbitA0=P2^0;sbitA1=P2^1;sbitLCD_RS=P2^2;sbitLCD_RW=P2^3;sbitADC_A=P2^4;sbitADC_B=P2^5;sbitADC_ST=P2^7;sbitADC_EOC=P3^0;sbitHIGH=P3^1;sbitLOW=P2^6;sbitLCD_E=P3^5;sbitA_WR=P3^6;sbitA_RD=P3^7;ucharcodetable[]="0123456789ABCDE";//定义显示的数组ucharcodetable1[]=".";ucharcodetable2[]="Real:";//9ucharcodetable3[]="Target:";//9ucharcodetable4[]="Settedvalueis：";//15ucharcodetable6[]="welcometouse";//ucharcodetable7[]="thissystem";//voidinit();//函数声明voidwrite_data(uchardate);voidwrite_com(ucharcom);voiddelay(uintz);voiddealdata();voidcommon();voidget_tem();voidinput_tem();intfindkey();voidwelcom();floatread_adc();voidcls();//定义变量intflag,i,j,k,count,oldcount,realcount;//k键号，i键行数，j键列数flag
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现在的状态，是//正在输入还是常态intreal__tem,bai1,shi1,ge1,set__tem,bai,shi,ge;//实际温度intset_tem[6],real_tem[6],num;//温度数组都是从第二位开始使用count=0;voidmain()//系统主函数{init();//系统初始化while(1){get_tem();//获取传感器的温度值if(flag==0)common();}}voidinit()//系统初始化函数{EA=1;IT0=1;EX0=1;//外部中断初始化A1=1;A0=1;A_RD=1;A_WR=0;//8255A初始化P1=0XF0;COM=P0;COM=0X90;A1=1;A0=0;LCD_E=0;//1602初始化write_com(0x38);write_com(0x0c);write_com(0x06);write_com(0x01);welcom();//显示欢迎界面delay(100);cls();//清屏}voidINT0_INTProc(void)interrupt0//外部中断函数{EA=0;dealdata();EA=1;}voiddealdata()//中断处理函数{intu;u=findkey();count=count+1;if(count==1)//
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示是第一次按键。{cls();input_tem();flag=1;//状态字，表示现在正在键入标准温度}if(u>=0&u<=9)//表示正常输入数字{set_tem[count]=u;write_com(0x80+0x40+count);write_data(table[u]);}if(u==10)//表示按下删除{count=0;cls();input_tem();}if(u==12)//表示按下确定{count=count-1;oldcount=count;set__tem=count*set_tem[count]+set__tem;if(count==2){set__tem=set_tem[2]+set_tem[1]*10;}if(count==3){set__tem=set_tem[3]+set_tem[2]*10+set_tem[1]*100;}flag=0;count=0;//计数变量清零cls();common();//调用common函数返回}}voidcommon()//常态函数{//开始定位写设定温度write_com(0x80);for(num=0;num<9;num++){write_data(table2[num]);delay(2);}for(num=1;num<=3;num++){write_data(table[real_tem[num]]);//向1602写入实际温度}//开始换行写实际温度write_com(0x80+0x40);for(num=0;num<9;num++){write_data(table3[num]);delay(2);}for(num=1;num<=oldcount;num++){write_data(table[set_tem[num]]);//向1602写入设定温度}}intfindkey()//查询按键程序{charKeyposi;i=0;j=0;P1=0xf0;if(P1!=0xf0){P1=0xf0;Keyposi=P1;if(Keyposi!=0xf0){if(L1==0){j=1;}if(L2==0){j=2;}if(L3==0){j=3;}P1=0x0F;if(H1==0){i=0;}if(H2==0){i=3;}if(H3==0){i=6;}if(H4==0){i=9;}k=i+j;//k=10代表删除k=12代表确定if(k==11){k=0;}}}else{k=13;}//如果没有键按下k返回13。P1=0xF0;delay(100);return(k);}voidget_tem()//获取传感器温度{uchardate=0;floattemp,temp1,temp2,temp3;temp=temp1=temp2=temp3=0.0;A1=0;A0=0;A_RD=0;A_WR=1;//设置8255A读A口输入到数据总线ADC_A=0;ADC_B=0;//选择IN0date=read_adc();temp1=(float)date*5.0/256;ADC_A=0;ADC_B=1;//选择IN1date=read_adc();temp2=(float)date*5.0/256;ADC_A=1;ADC_B=1;//选择IN2date=read_adc();temp3=(float)date*5.0/256;temp=(temp1+temp2+temp3)/3.0;real__tem=(int)temp;temp=temp*40.0;bai1=(int)temp/100;shi1=(int)temp%100/10;ge1=(int)temp%100%10/1;real_tem[1]=bai1;real_tem[2]=shi1;real_tem[3]=ge1;cls();if(real__tem>=set__tem+10)//实际温度过高，开风扇，关加热器{LOW=0;HIGH=1;}if(real__tem=set__tem-10)&(real__tem0;x--)for(y=110;y>0;y--);}voidwrite_com(ucharcom)//LCD写指令{A1=0;A0=1;A_RD=1;A_WR=0;//写数据总线到B口输出LCD_RW=0;LCD_RS=0;PB=com;delay(10);LCD_E=1;delay(10);LCD_E=0;}voidwrite_data(uchardate)//LCD写数据{A1=0;A0=1;A_RD=1;A_WR=0;//写数据总线到B口输出LCD_RW=0;LCD_RS=1;PB=date;delay(10);LCD_E=1;delay(10);LCD_E=0;}
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