esp32 firmware for a toaster reflow oven WIP!!!!!
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reflower/main/arduinopid.h

53 lines
1.2 KiB

5 years ago
/**
* adapted from the Arduino PID library
*
* Created on 2020/01/08.
*/
#ifndef ARDUINOPID_H
#define ARDUINOPID_H
#include <stdint.h>
enum PIDCtlMode {
PID_MANUAL = 0,
PID_AUTOMATIC = 1,
};
enum PIDDirection {
PID_DIRECT = 0,
PID_REVERSE = 1,
};
struct PID {
/*working variables*/
uint32_t lastTime;
float Input, Output, Setpoint;
float ITerm, lastInput;
float kp, ki, kd;
uint32_t SampleTime; //1 sec = 1000
float outMin, outMax;
enum PIDCtlMode ctlMode; // false
enum PIDDirection controllerDirection;
};
#define PID_DEFAULT() { .SampleTime = 1000, .ctlMode=PID_MANUAL, .controllerDirection=PID_DIRECT }
void PID_Compute(struct PID *self, float Input);
void PID_SetTunings(struct PID *self, float Kp, float Ki, float Kd);
void PID_SetSampleTime(struct PID *self, uint32_t NewSampleTime);
void PID_SetOutputLimits(struct PID *self, float Min, float Max);
void PID_SetCtlMode(struct PID *self, enum PIDCtlMode Mode);
void PID_Initialize(struct PID *self);
void PID_SetSetpoint(struct PID *self, float Setpoint);
void PID_SetControllerDirection(struct PID *self, enum PIDDirection Direction);
#endif //ARDUINOPID_H