/*模糊PID控制温控系统仿真设计C程序代码*/#include#define uchar unsigned char#define uint unsigned int#define PULSE 200#define number 0.035 sbit SDO = P20; sbit SDI = P21;sbit CS = P22;sbit CLK = P23;sbit EOC = P24;sbit RS = P25; sbit RW = P26;sbit EN = P27;sbit KEY1= P30;sbit KEY2= P31; sbit KEY3= P32;sbit KEY4= P33;sbit KEY5= P34; sbit IN1 = P35; sbit IN2 = P36;sbit ENA = P37;uchar flag; uchar flag_start;float S_temp=60.0; float P_temp=20.0; float Kp;float Ki;float Kd;float Err=0.0;float Last_Err=0.0;float D_Err=0.0;float Sum_Err=0.0;float U=0.0;/* 函数功能：延时*/void delay_ms(uchar z) uchar i; uchar j; for(i=z;i0;i-) for(j=360;j0;j-); void delay_us(uchar z) uchar i; for(i=z;i0;i-);void LCD_WriteData(uchar Dat) RS = 1; P1 = Dat; delay_us(10); EN = 1; delay_us(10); EN = 0;void LCD_WriteCOM(uchar com) RS = 0; P1 = com; delay_us(10); EN = 1; delay_us(10); EN = 0;void Show_Num(uchar x,uchar y,uchar n,float num) uchar a3; uchar i; uint Temp; Temp=(int)num; for(i=0;i0;i-) LCD_WriteData(ai-1+0x30); void Show_Ki(uchar num_Ki)uchar Temp;num_Ki=Ki*100;Temp=(uchar)num_Ki; Show_Num(10,2,1,Temp%10);Temp=Temp/10;Show_Num(9,2,1,Temp%10); Temp=Temp/10;Show_Num(7,2,1,Temp);void Show_char(uchar x,uchar y,uchar ch) if(y%2 = 1) LCD_WriteCOM(0x80+x); else LCD_WriteCOM(0x80+0x40+x); LCD_WriteData(ch); void LCD_Init(void) RW = 0; EN = 0; LCD_WriteCOM(0x38); LCD_WriteCOM(0x0c); LCD_WriteCOM(0x06); LCD_WriteCOM(0x01);/* 函数功能：显示函数*/void LCD_display(void) Show_char(1,1,T); delay_us(10); Show_char(0,1,P); delay_us(10); Show_char(1,1,T); delay_us(10); Show_char(2,1,:); delay_us(10); Show_Num(3,1,3,P_temp); delay_us(10); Show_char(10,1,S); delay_us(10); Show_char(11,1,T); delay_us(10); Show_char(12,1,:); delay_us(10); Show_Num(13,1,3,S_temp); delay_us(10); Show_char(0,2,P); delay_us(10); Show_char(1,2,:); delay_us(10); Show_Num(2,2,2,Kp); delay_us(10); Show_char(5,2,I); delay_us(10); Show_char(6,2,:); delay_us(10); Show_char(8,2,.); delay_us(10); Show_Ki(Ki); delay_us(10); Show_char(12,2,D); delay_us(10); Show_char(13,2,:); delay_us(10); Show_Num(14,2,2,Kd); delay_us(10);/* 函数功能：定时器2初始化*/void Timer2_Init() RCAP2H =(65536-300)/256; RCAP2L =(65536-300)%256; TH2 = RCAP2H; TL2 = RCAP2L; ET2 = 1; TR2 = 1; EA = 1;/* 函数功能：键盘扫描，调整设置温度*/void key_scan(void)if(KEY1=0) delay_ms(1);if(KEY1=0)S_temp=S_temp+1;if(S_temp=200)S_temp=200;while(!KEY1);if(KEY2=0)delay_ms(1);if(KEY2=0)if(S_temp0)S_temp=S_temp-1;else if(S_temp=0)S_temp=0;while(!KEY2);if(KEY3=0) delay_ms(1);if(KEY3=0)if(S_temp=10)S_temp=S_temp-10;while(!KEY4);if(KEY5=0) delay_ms(1);if(KEY5=0)flag_start=1; while(!KEY5);/* 函数功能：PID的计算*/void PID_Calculate() Err = S_temp - P_temp; Sum_Err += Err; D_Err = Err - Last_Err; Last_Err = Err; U=Kp*Err+Ki*Sum_Err+Kd*D_Err; U=(int)U; if(U=0) if(U=200)U=200;flag=1; else U=-U;if(U=200)U=200;flag=0; /* 函数功能：PID参数Kp的计算 */ float fuzzy_k