基于AT89C51单片机设计的pid 算法的 加热炉(含protues仿真图)

基于 AT89C51 单片机设计的 pid 算法的 加热炉 含 protues 仿真图 include include PID h include lcd1602 h include adc0809 h sbit up P2 4 sbit down P2 5 uchar s xian1 Set temp C uchar s xian2 Rel temp C uchar value uchar set temp 200 rel temp 设定值 和 测量值 void delay ms uchar ms uchar i j for i 0 i ms i for j 0 j 120 j void key up down if up 0 delay ms 1 if up 0 set temp while up if down 0 delay ms 1 if down 0 set temp while down s xian1 9 set temp 100 0 x30 s xian1 10 set temp 100 10 0 x30 s xian1 11 set temp 100 10 0 x30 void main lcd init while 1 key up down rel temp adc0809 PID set temp rel temp write com 0 x80 display s xian1 write com 0 xc0 display s xian2 include include adc0809 h uchar measure table 3 uchar voltage extern uchar s xian2 void delay1 uchar i 50 while i void adc init start 1 delay1 start 0 while EOC 0 delay1 voltage P1 uchar adc0809 uchar dat t adc init dat voltage 300 0 255 table 0 dat 100 t dat 100 table 1 t 10 table 2 t 10 s xian2 9 table 0 0 s xian2 10 table 1 0 s xian2 11 table 2 0 measure table 0 100 table 1 10 table 2 return measure include include include PID h define DA data P3 sbit DA wr1 P2 3 uchar uk void DAC0832 void PID control uchar set uchar rel void PID uchar set uchar rel uchar D value 0 设定值与实际值的差值 if set rel D value set rel if D value 20 uk 255 else PID control set rel else D value rel set if D value 10 uk 10 else PID control set rel DAC0832 void PID control uchar set uchar rel uchar Kp 200 Ki 3 Kd 5 char e2 0 e1 0 e0 0 uint u0 0 u 0 e2 set rel u Kp e2 e1 Ki e2 Kd e2 2e1 e0 u0 uk u e0 e1 e1 e2 u0 u void DAC0832 DA wr1 1 DA data uk DA wr1 0 nop nop nop nop DA wr1 1 include include lcd1602 h void delay uchar i uchar j m for j 0 j i j for m 0 m 100 m void write com uchar com rs 0 rw 0 P0 com delay 5 e 1 delay 5 e 0 void write data uchar date rs 1 rw 0 P0 date delay 5 e 1 delay 5 e 0 void lcd init e 0 write com 0 x38 write c