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#include <main.h>
int PWM_I,PWM_P;
unsigned char count , high_time=0; //占空比調(diào)節(jié)
bit flag;
uint temp_m1=0;
int temp_m=0; //溫度放大100倍后的中轉(zhuǎn)值
int set_temp=0; //設(shè)置溫度*100
void InitTimer0(void) //
{
TMOD = 0x01;
TH0 = 0x28;
TL0 = 0x00;
EA = 1;
ET0 = 1;
TR0 = 1;
}
void pid_control () //PID控制
{
if(set_temp>temp_m)
{
if(set_temp-temp_m>250) //如果設(shè)定溫度大于實(shí)際溫度2.5度
high_time=100; //全力加熱
else //否則
{
PWM_I=pid_calc(&temp_PID,temp_m); // 高電平輸出PID計(jì)算值
if(high_time<=100)
high_time= PWM_I; //限制高電平最大100
else
high_time=100;
}
}
else
high_time=0; //實(shí)際大于設(shè)定時(shí)輸出低電平
}
void Timer0Interrupt(void) interrupt 1 //PWM波輸出
{
if(++count<=(high_time)) //
PWM=0;
else if(count<=100)
PWM=1;
else
count=0;
TH0 = 0x28;
TL0 = 0x00;
}
void main()//主函數(shù)
{
InitTimer0(); //定時(shí)器初始化
init();//初始化函數(shù)
pid_init (&temp_PID); //PID初始化
temp_PID.Proportion =60; //設(shè)置PID比例系數(shù)
temp_PID.Integral =5; //設(shè)置PID積分系數(shù)
temp_PID.Derivative =2; //設(shè)置PID微分系數(shù)
while(1)
{
temp_control();//控制按鍵函數(shù)
temp_m1=get_temp(Ds18b20ReadTemp()); //提取計(jì)算溫度值
display_real_tenp(temp_m1); //顯示函數(shù) 刷新溫度
temp_m=unnormal_proccessing(temp_m1); //計(jì)數(shù)值=60 賦值溫度放大100倍溫度轉(zhuǎn)換函數(shù)*100
pid_control();
PWM_P=high_time;
LcdWriteCom(0x80+0X40+0x0C);
LcdWriteData('0'+PWM_P/100);
LcdWriteCom(0x80+0X40+0x0D);
LcdWriteData('0'+PWM_P%100/10);
LcdWriteCom(0x80+0X40+0x0E);
LcdWriteData('0'+PWM_P%10);
}
}
void init()//初始化函數(shù)
{
uint i,j;
//函數(shù)初始化
LcdInit();//LCD初始化函數(shù)
Ds18b20Init(); //18b20初始化
//I/O口初始化
PWM=0;//不制熱
//LCD初始化顯示
LcdWriteCom(0x80);//第一行顯示
j=strlen(num1);
for(i=0; i<j; i++)
{
LcdWriteData(num1[i]); [/i][i]
delay_ms(1);
}
LcdWriteCom(0x80+0x40);//第二行顯示
j=strlen(num2);
for(i=0; i<j; i++)
{
LcdWriteData(num2[i]); [/i][i]
delay_ms(1);
}
LcdWriteCom(0x04); //關(guān)閉寫一個(gè)指針加1
}
uint get_temp(uint temp)//計(jì)算溫度函數(shù)
{
float tp;
tp=temp;//因?yàn)閿?shù)據(jù)處理有小數(shù)點(diǎn)所以將溫度賦給一個(gè)浮點(diǎn)型變量
//如果溫度是正的那么，那么正數(shù)的原碼就是補(bǔ)碼它本身
temp=tp*0.0625*100+0.5;
//留兩個(gè)小數(shù)點(diǎn)就*100，+0.5是四舍五入，因?yàn)镃語(yǔ)言浮點(diǎn)數(shù)轉(zhuǎn)換為整型的時(shí)候把小數(shù)點(diǎn)
//后面的數(shù)自動(dòng)去掉，不管是否大于0.5，而+0.5之后大于0.5的就是進(jìn)1了，小于0.5的就
//算加上0.5，還是在小數(shù)點(diǎn)后面。
return temp;
}
void display_real_tenp(uint temp)//實(shí)時(shí)溫度顯示函數(shù)
{
uchar datas[] = {0, 0, 0, 0}; //定義數(shù)組
datas[0] = temp % 10000 / 1000;
datas[1] = temp % 1000 / 100;
datas[2] = temp % 100 / 10;
datas[3] = temp % 10;
LcdWriteCom(0x80+0x0a); //寫地址 80表示初始地址
LcdWriteData('0'+datas[0]); //十位
LcdWriteCom(0x80+0x0b); //寫地址 80表示初始地址
LcdWriteData('0'+datas[1]); //個(gè)位
LcdWriteCom(0x80+0x0d); //寫地址 80表示初始地址
LcdWriteData('0'+datas[2]); //顯示小數(shù)點(diǎn)
LcdWriteCom(0x80+0x0e); //寫地址 80表示初始地址
LcdWriteData('0'+datas[3]); //顯示小數(shù)點(diǎn)
}
void temp_control()//控制溫度上下限函數(shù)
{
if(limit_choise==0)//選擇按鍵
{
delay_ms(5);
if(limit_choise==0)
{
while(!limit_choise);
limit_choise_num++;
if(limit_choise_num>=2)
{
limit_choise_num=0;
}
}
}
if(limit_choise_num==0)//正常顯示
{
LcdWriteCom(0x0c);//關(guān)閉光標(biāo)
}
if(limit_choise_num==1)//調(diào)節(jié)上限溫度
{
LcdWriteCom(0x80+0X40+2);
LcdWriteCom(0x0f);//開(kāi)啟光標(biāo)
if(increase_temperature==0)//增加溫度
{
delay_ms(5);
if(increase_temperature==0)
{
while(!increase_temperature);
up_limit_temp++;
if(up_limit_temp>=100)
{
up_limit_temp=0;
}
//寫入新數(shù)據(jù)
LcdWriteCom(0x80+0X40+0x03);
LcdWriteData('0'+up_limit_temp/10);
LcdWriteCom(0x80+0X40+0x04);
LcdWriteData('0'+up_limit_temp%10);
LcdWriteCom(0x80+0X40+2);//光標(biāo)回寫
}
}
if(reduce_temperature==0)//減少溫度
{
delay_ms(5);
if(reduce_temperature==0)
{
while(!reduce_temperature);
up_limit_temp--;
if(up_limit_temp<0)
{
up_limit_temp=99;
}
//寫入新數(shù)據(jù)
LcdWriteCom(0x80+0X40+0x03);
LcdWriteData('0'+up_limit_temp/10);
LcdWriteCom(0x80+0X40+0x04);
LcdWriteData('0'+up_limit_temp%10);
LcdWriteCom(0x80+0X40+2);//光標(biāo)回寫
}
}
}
set_temp=up_limit_temp*100; //放大100倍計(jì)算
temp_PID.SetPoint =set_temp;
}
int unnormal_proccessing(uint temp)//溫度轉(zhuǎn)換函數(shù)
{
uchar datas[] = {0, 0, 0, 0}; //定義數(shù)組
int temp1=0;
datas[0] = temp % 10000 / 1000;
datas[1] = temp % 1000 / 100;
datas[2] = temp % 100 / 10;
datas[3] = temp % 10;
temp1=datas[0]*1000+datas[1]*100+datas[2]*10+datas[3];//實(shí)際的溫度乘以100
return temp1;
}

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