Mercurial > mbsePi-apps / file comparison
comparison: brewco/pid.h
brewco/pid.h
- changeset 434
- eb724767860d
- child 435
- 4b1ed6897d80
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| 433:1421ece29197 | 434:eb724767860d |
|---|---|
| 1 #ifndef PID_H | |
| 2 #define PID_H | |
| 3 | |
| 4 #define PID_MODE_NONE 0 /* Process control off */ | |
| 5 #define PID_MODE_AUTO 1 /* Process control auto */ | |
| 6 #define PID_MODE_BOO 2 /* Process control Bang On/Off */ | |
| 7 | |
| 8 #define PID_TIMES 60 /* 60 calculations per minute */ | |
| 9 #define PID_WINDUP_GUARD 10.0 /* Error windup guard */ | |
| 10 | |
| 11 | |
| 12 typedef struct _pid_var { | |
| 13 double iMax; /* Maximum allowable integrator state */ | |
| 14 double iGain; /* Integral gain */ | |
| 15 double pGain; /* Proportional gain */ | |
| 16 double dGain; /* Derivative gain */ | |
| 17 | |
| 18 double Input; /* Input value */ | |
| 19 double Err; /* Error, diff between input and set point */ | |
| 20 double ErrLast; /* Error from last pass */ | |
| 21 double iState; /* Error from next last pass */ | |
| 22 double SetP; /* Set point */ | |
| 23 double OutP; /* Output of PID algorithm */ | |
| 24 int Mode; /* Value is 'PID_AUTO' if loop is automatic */ | |
| 25 } pid_var; | |
| 26 | |
| 27 | |
| 28 void InitPID( pid_var *); | |
| 29 void UpdatePID( pid_var *); | |
| 30 | |
| 31 #endif |
