基于单片机温度控制液晶显示电路图及程序.docx

温度控制.c文档#include#includedelay.h#includeLCD_1602.h#includeds18b20.h#define uchar unsigned char#define uint unsigned intsbit kaitong=P20;int cc,dd=0,Er,Er0,Er1,Er2,SetPoint,PrevError=0,LastError=0,Error=0,dError=0;long int SumError;float Proportion=0.5,Integral=0.0003,Derivative=0.07;int Sv,Sv1=0,Sv2=0,Sv3=0,Sv4=0; int b0,b1,a,b,c;int j=0,i;/*= PID计算部分 =*/ int PIDCalc(int NextPoint) Error = SetPoint - NextPoint; / 偏差 if(Error=100)b=20;else if(Error=85)b=Error/7+5;else if(Error=55)b=Error/8+5;else if(Error=30)b=Error/7+2; elseif(NextPoint-SetPoint)20) b=20;elseb=a; if(NextPoint-SetPoint)5) b=0;return b;/*按键扫描*/void scan_key() P1=0XFF; if(P1=0XFE) /s7 delayl(7); if(P1=0XFE) Sv1+; if(Sv19) Sv2+; Sv1=0; else if(P1=0xDF) /s13 delayl(7); if(P1=0XDF) Sv1-; if(Sv10) Sv2-; Sv1=9; else if(Sv2=0) Sv2=0; Sv1=0; else if(P1=0XFD)/s9 delayl(7); if(P1=0XFD) Sv2+; else if(P1=0xFB)/s10 delayl(7); if(P1=0XFB) Sv2-; if(Sv2SetPoint) Er=i-SetPoint;else Er=SetPoint-i; Er0=Er/100+0; Er1=(Er/10)%10+0; Er2=Er%10+0;setPosition(1,9);prints(Er:);printc(Er0);printc(Er1);printc(.);printc(Er2); /*占空比显示*/void B_display() setPosition(2,10); b0=(b/10)%10+0; b1=b%10+0;prints(B:);printc(b0); printc(b1);setPosition(2,14);prints( );/*最大值显示*/void Pvmax_display() i=readtemp(); if(i=j) j=i; IntToStr(j,buffer,3);setPosition(2,10);prints(M:);printc(buffer0);printc(buffer1);printc(.);printc(buffer2);printc(0xDF);printc(C);/*按键处理*/void body() while(1) scan_key1();if(Sv3=1) while(1)LCD_init();setPosition(1,3); prints(setpoint!); delayl(2000); write_com(0x01);while(1)scan_key();LCD_display();scan_key1(); if(Sv3=0) while(1) dd+;if(dd20)dd=1;if(dd0;i-)for(j=114;j0;j-);void delays(uchar i)/短延时while(i-);#endifDS18B20.h 文档#ifndef ds18b20#define ds18b20#includesbit DQ =P22; /定义通信端口uchar Init_DS18B20(void) uchar x=0; DQ = 1; /DQ复位 delays(8); /稍做延时 DQ = 0; /单片机将DQ拉低 delays(80); /精确延时大于480us DQ = 1; /拉高总线 delays(14); x=DQ; /稍做延时后如果x=0则初始化成功x=1则初始化失败 delays(20); return (x);ReadOneChar(void)uchar i=0;uchar dat=0;DQ=1;for (i=8;i0;i-)DQ = 0; / 给脉冲信号dat=1; DQ = 1; / 给脉冲信号if(DQ)dat|=0x80;delays(4); return(dat);WriteOneChar(uchar dat) uchar i=0; DQ=1; for (i=8; i0; i-) DQ = 0; DQ = dat&0x01; delays(5); DQ = 1; dat=1; int readtemp()uchar a=0;uchar b=0;uint t=0;float tt=0;Init_DS18B20();WriteOneChar(0xCC); / 跳过读序号列号的操作WriteOneChar(0x44); / 启动温度转换Init_DS18B20();WriteOneChar(0xCC); /跳过读序号列号的操作 WriteOneChar(0xBE); /读取温度寄存器等（共可读9个寄存器） 前两个就是温度a=ReadOneChar();b=ReadOneChar();t=b;t=8;t=t|a;tt=t*0.0625;t= tt*10+0.5; /放大10倍输出并四舍五入-此行没用return(t);#endifLCD1602.h文档#ifndef LCD_1602#define LCD_1602 #includedelay.h/*端口定义，可以修改*/sbit ledrs=P23;/读写控制字 sbit leden=P25;/使能端控制字sbit ledrw=P24;void write_com(uchar com) ledrw=0;ledrs=0;P0=com;delayl(5);leden=1;delayl(5);leden=0;void write_data(uchar date) ledrw=0;ledrs=1;P0=date;delayl(5);leden=1;delayl(5);leden=0;void LCD_init() leden=0; write_com(0x38); write_com(0x0c); write_com(0x06); write_com(0x01); void setPosition(uchar x,uchar y)uchar pos;switch(x%2)case 1:pos=0x80+y;break; /第一行case 0:pos=0xc0+y;break; /第二行write_com(pos); void printc(uchar a)write_data(a);void prints(uchar * str) uchar i = 0; while(stri != 0) write_data(stri+); uchar buffer5;void IntToStr(uint t, uchar *str, uchar n) uchar a5; char i, j; /取得整数值到数组 a0=t/100; /百位 a1=(t/10)%10;/十位 a2=t%10; /个位 for(i=0; i3; i+) /转成ASCII码 ai=ai+0; for(i=0; ai=0 & i=3; i+); for(j=3-n; ji; j+) /填充空格 *str= ; str+; for(; i3; i+) *str=ai; str+; /加入有效的数字 *str=0; #endifPID.h 文档#ifndef pid_adjust#define pid_adjust/*struct PID int SetPoint; / 设定目标Desired value float Proportion; / 比例常数Proportional Const float Integral; / 积分常数Integral Const float Derivative; / 微分常数Derivative Const int LastError; / Error-1 int PrevError; / Error-2 int SumError; / Sums of Errors ; struct PID pid; */SetPoint=800;Proportion=0.15;Integral=0.05;Derivative=0.0;SumError=0;PrevError=0;LastError=0; int Error,dError;/*= PID计算部分 =*/ int PIDCalc(int NextPoint) Error = SetPoint - NextPoint