51单片机-温度PID算法(C程序)

第第页51单片机-温度PID算法(C程序)#include"reg51.h"#include"intrins.h"#include"math.h"#include"string.h"structPID{unsignedintSetPoint;//设定目标DesiredValueunsignedintProportion;//比例常数ProportionalConstunsignedintIntegral;//积分常数IntegralConstunsignedintDerivative;//微分常数DerivativeConstunsignedintLastError;//Error[-1]unsignedintPrevError;//Error[-2]unsignedintSumError;//SumsofErrors};structPIDspid;//PIDControlStructureunsignedintrout;//PIDResponse(Output)unsignedintrin;//PIDFeedback(Input)sbitdata1=P1^0;sbitclk=P1^1;sbitplus=P2^0;sbitsubs=P2^1;sbitstop=P2^2;sbitoutput=P3^4;sbitDQ=P3^3;unsignedcharflag,flag_1=0;unsignedcharhigh_time,low_time,count=0;//占空比调节参数unsignedcharset_temper=25;unsignedchartemper;unsignedchari;unsignedcharj=0;unsignedints;voiddelay(unsignedchartime){unsignedcharm,n;for(n=0;nfor(m=0;m>i;temp=tempwrite_bit(temp);}delay(7);//TR0=1;EA=1;}unsignedcharread_bit(){unsignedchari,value_bit;EA=0;DQ=0;_nop_();_nop_();DQ=1;for(i=0;i>4;temper=i|j;}voidPIDInit(structPID*pp){memset(pp,0,sizeof(structPID));//全部初始化为0}unsignedintPIDCalc(structPID*pp,unsignedintNextPoint){unsignedintdError,Error;Error=pp->SetPoint-NextPoint;//偏差pp->SumError+=Error;//积分dError=pp->LastError-pp->PrevError;//当前微分pp->PrevError=pp->LastError;pp->LastError=Error;return(pp->Proportion*Error//比例项+pp->Integral*pp->SumError//积分项+pp->Derivative*dError);//微分项}voidcompare_temper(){unsignedchari;if(set_temper>temper)//是否设置的温度大于实际温度{if(set_temper-temper>1)//设置的温度比实际的温度是否是大于1度{high_time=100;//如果是，则全速加热low_time=0;}else//如果是在1度范围内，则运行PID计算{for(i=0;i0){high_time=0;low_time=100;}else{for(i=0;i>1;if(m==1)data1=1;elsedata1=0;_nop_();clk=1;_nop_();}}}voiddisplay(){unsignedcharcodenumber[]={0xfc,0x60,0xda,0xf2,0x66,0xb6,0xbe,0xe0,0xfe,0xf6};unsignedchardisp_num[6];unsignedintk,k1;k=high_time;k=k00;k1=k/100;if(k1==0)disp_num[0]=0;elsedisp_num[0]=0x60;k=k0;disp_num[1]=number[k/10];disp_num[2]=number[k];k=temper;k=k0;disp_num[3]=number[k/10];disp_num[4]=number[k]+1;disp_num[5]=number[s/10];disp_1(disp_num);}voidmain(){unsignedcharz;unsignedchara,b,flag_2=1,count1=0;unsignedcharphil[]={2,0xce,0x6e,0x60,0x1c,2};TMOD=0x21;TH0=0x2f;TL0=0x40;SCON=0x50;PCON=0x00;TH1=0xfd;TL1=0xfd;PS=1;EA=1;EX1=0;ET0=1;ES=1;TR0=1;TR1=1;high_time=50;low_time=50;PIDInit(//InitializeStructurespid.Proportion=10;//SetPIDCoefficients比例常数ProportionalConstspid.Integral=8;//积分常数IntegralConstspid.Derivative=6;//微分常数DerivativeConstspid.SetPoint=100;//SetPIDSetpoint设定目标DesiredValuewhile(1){if(plus==0){EA=0;for(a=0;a5)temper=a;elsetemper=b;a=temper;flag_2=0;if(++count1>30){display();count1=0;}compare_temper();}TR0=