C51的PID算法

awesome

//PID算法温控C语言2008-08-17 18:58
0 x, K/ g! n" K; L8 }5 b" H#include<w77e58.h>
#include<intrins.h>
3 C1 ?9 T9 ~$ `2 }#include<math.h>
#include<string.h>
* s' O8 z. Y. r/ s5 x$ hstruct 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]
, G8 W) f2 I$ V1 |9 J+ C: t  Tunsigned int SumError; // Sums of Errors
};
3 l$ I/ S* ]4 P& P5 ]! `6 o, ~+ qstruct PID spid; // PID Control Structure
8 y- B& J9 _+ G7 Punsigned int rout; // PID Response (Output)
unsigned int rin; // PID Feedback (Input)
sbit data1=P1^0;
sbit clk=P1^1;
1 ?: N3 G. s  Y* C+ ~' @sbit plus=P2^0;
sbit subs=P2^1;
% E2 S* s: `0 J5 |sbit stop=P2^2;
sbit output=P3^4;
- D% p" k- f6 l$ T# E, F- `sbit DQ=P3^3;
. h. F; q8 t4 s& |& wunsigned char flag,flag_1=0;
unsigned char high_time,low_time,count=0;//占空比调节参数
unsigned char set_temper=35;
unsigned char temper;
unsigned char i;
+ I8 D6 A! U+ p. l$ i. H0 ]unsigned char j=0;
unsigned int s;
/***********************************************************
0 Z  Z9 P$ ?8 \- g- U+ A+ B! x# O延时子程序,延时时间以12M晶振为准,延时时间为30us×time
***********************************************************/
( l( g9 x% ~7 R* ?# D: P+ Cvoid delay(unsigned char time)
{
unsigned char m,n;
for(n=0;n<time;n++)
8 Q0 k5 ^7 c. g4 f3 Sfor(m=0;m<2;m++){}
}
- }8 V  ?: v5 @8 m+ R/***********************************************************
9 }+ t, S( E' N# ?. v; M4 V% O写一位数据子程序
% g# Q& L; H/ G( l+ _2 {" g3 T- @$ ?, A***********************************************************/

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