#include "reg51.h"

#include "intrins.h"

#include "math.h"

#include "string.h"

struct PID

{

unsigned int SetPoint; // 设定目标 Desired Value

unsigned int Proportion; // 比例常数 Proportional Const

unsigned int Integral; // 积分常数 Integral Const

unsigned int Derivative; // 微分常数 Derivative Const

unsigned int LastError; // Error[-1]

unsigned int PrevError; // Error[-2]

unsigned int SumError; // Sums of Errors

};

struct PID spid; // PID Control Structure

unsigned int rout; // PID Response (Output)

unsigned int rin; // PID Feedback (Input)

sbit data1=P1^0;

sbit clk=P1^1;

sbit plus=P2^0;

sbit subs=P2^1;

sbit stop=P2^2;

sbit output=P3^4;

sbit DQ=P3^3;

unsigned char flag,flag_1=0;

unsigned char high_time,low_time,count=0;//占空比调节参数

unsigned char set_temper=25;

unsigned char temper;

unsigned char i;

unsigned char j=0;

unsigned int s;

void delay(unsigned char time)

{

unsigned char m,n;

for(n=0;n

for(m=0;m<2;m++){}

}

void write_bit(unsigned char bitval)

{

EA=0;

DQ=0;

if(bitval==1)

{

_nop_();

DQ=1;

}

delay(5);

DQ=1;

_nop_();

_nop_();

EA=1;

}

void write_byte(unsigned char val)

{

unsigned char i;

unsigned char temp;

EA=0;

TR0=0;

for(i=0;i<8;i++)

{

temp=val>>i;

temp=temp&1;

write_bit(temp);

}

delay(7);

// TR0=1;

EA=1;

}

unsigned char read_bit()

{

unsigned char i,value_bit;

EA=0;

DQ=0;

_nop_();

_nop_();

DQ=1;

for(i=0;i<2;i++){}

value_bit=DQ;

EA=1;

return(value_bit);

}

unsigned char read_byte()

{

unsigned char i,value=0;

EA=0;

for(i=0;i<8;i++)

{

if(read_bit())

value|=0x01<

delay(4);

}

EA=1;

return(value);

}

unsigned char reset()

{

unsigned char presence;

EA=0;

DQ=0;

delay(30);

DQ=1;

delay(3);

presence=DQ;

delay(28);

EA=1;

return(presence);

}

void get_temper()

{

unsigned char i,j;

do

{

i=reset();

} while(i!=0);

i=0xcc;

write_byte(i);

i=0x44;

write_byte(i);

delay(180);

do

{

i=reset();

} while(i!=0);

i=0xcc;

write_byte(i);

i=0xbe;

write_byte(i);

j=read_byte();

i=read_byte();

i=(i<<4)&0x7f;

s=(unsigned int)(j&0x0f); //得到小数部分

s=(s*100)/16;

j=j>>4;

temper=i|j;

}

void PIDInit (struct PID *pp)

{

memset ( pp,0,sizeof(struct PID)); //全部初始化为0

}

unsigned int PIDCalc( struct PID *pp, unsigned int NextPoint )

{

unsigned int dError,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

}

void compare_temper()

{

unsigned char i;

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;i<10;i++)

{

get_temper(); //获取温度

rin = s; // Read Input

rout = PIDCalc ( &spid,rin ); // Perform PID Interation

}

if (high_time<=100)

high_time=(unsigned char)(rout/800);

else

high_time=100;

low_time= (100-high_time);

}

}

else if(set_temper<=temper)

{

if(temper-set_temper>0)

{

high_time=0;

low_time=100;

}

else

{

for(i=0;i<10;i++)

{

get_temper();

rin = s; // Read Input

rout = PIDCalc ( &spid,rin ); // Perform PID Interation

}

if (high_time<100)

high_time=(unsigned char)(rout/10000);

else

high_time=0;

low_time= (100-high_time);

}

}

// else

// {}

}

void serve_T0() interrupt 1 using 1

{

if(++count<=(high_time))

output=1;

else if(count<=100)

{

output=0;

}

else

count=0;

TH0=0x2f;

TL0=0xe0;

}

void serve_sio() interrupt 4 using 2

{

}

void disp_1(unsigned char disp_num1[6])

{

unsigned char n,a,m;

for(n=0;n<6;n++)

{

// k=disp_num1[n];

for(a=0;a<8;a++)

{

clk=0;

m=(disp_num1[n]&1);

disp_num1[n]=disp_num1[n]>>1;

if(m==1)

data1=1;

else

data1=0;

_nop_();

clk=1;

_nop_();

}

}

}

void display()

{

unsigned char code number[]={0xfc,0x60,0xda,0xf2,0x66,0xb6,0xbe,0xe0,0xfe,0xf6};

unsigned char disp_num[6];

unsigned int k,k1;

k=high_time;

k=k00;

k1=k/100;

if(k1==0)

disp_num[0]=0;

else

disp_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);

}

void main()

{

unsigned char z;

unsigned char a,b,flag_2=1,count1=0;

unsigned char phil[]={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 ( &spid ); // Initialize Structure

spid.Proportion = 10; // Set PID Coefficients 比例常数 Proportional Const

spid.Integral = 8; //积分常数 Integral Const

spid.Derivative =6; //微分常数 Derivative Const

spid.SetPoint = 100; // Set PID Setpoint 设定目标 Desired Value

while(1)

{

if(plus==0)

{

EA=0;

for(a=0;a<5;a++)

for(b=0;b<102;b++){}

if(plus==0)

{

set_temper++;

flag=0;

}

}

else if(subs==0)

{

for(a=0;a<5;a++)

for(b=0;a<102;b++){}

if(subs==0)

{

set_temper--;

flag=0;

}

}

else if(stop==0)

{

for(a=0;a<5;a++)

for(b=0;b<102;b++){}

if(stop==0)

{

flag=0;

break;

}

EA=1;

}

get_temper();

b=temper;

if(flag_2==1)

a=b;

if((abs(a-b))>5)

temper=a;

else

temper=b;

a=temper;

flag_2=0;

if(++count1>30)

{

display();

count1=0;

}

compare_temper();

}

TR0=0;

z=1;

while(1)

{

EA=0;

if(stop==0)

{

for(a=0;a<5;a++)

for(b=0;b<102;b++){}

if(stop==0)

disp_1(phil);

// break;

}

EA=1;

}

}