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/*
* pid.h
*
* Created on: May 29, 2012
* Author: thomasgubler
*/
#ifndef PID_H_
#define PID_H_
#include <stdint.h>
/* PID_MODE_DERIVATIV_CALC calculates discrete derivative from previous error
* val_dot in pid_calculate() will be ignored */
#define PID_MODE_DERIVATIV_CALC 0
/* Use PID_MODE_DERIVATIV_SET if you have the derivative already (Gyros, Kalman) */
#define PID_MODE_DERIVATIV_SET 1
typedef struct {
float kp;
float ki;
float kd;
float intmax;
float sp;
float integral;
float error_previous;
uint8_t mode;
uint8_t plot_i;
uint8_t count;
uint8_t saturated;
} PID_t;
void pid_init(PID_t *pid, float kp, float ki, float kd, float intmax, uint8_t mode, uint8_t plot_i);
void pid_set_parameters(PID_t *pid, float kp, float ki, float kd, float intmax);
//void pid_set(PID_t *pid, float sp);
float pid_calculate(PID_t *pid, float sp, float val, float val_dot, float dt);
#endif /* PID_H_ */
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