pi.c File Reference

General PID implementation for AVR. More...

#include "general_header_node2.h"
#include "pi.h"
#include "stdint.h"

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Functions
void	pi_init (int16_t Kp_set, int16_t Ki_set, struct pi_t *regulator_p)
	Initialization of PID controller parameters. More...
int16_t	pi_controller (int16_t set_point, int16_t measurement, struct pi_t *regulator_p)
	PID control algorithm. More...
void	pi_reset_integrator (struct pi_t *regulator_p)
	Resets the integrator. More...

Detailed Description

General PID implementation for AVR.

Discrete PID controller implementation. Set up by giving P/I/D terms to Init_PID(), and uses a struct PID_DATA to store internal values.

Function Documentation

pi_controller()

int16_t pi_controller	(	int16_t	set_point,
		int16_t	measurement,
		struct pi_t *	regulator_p
	)

PID control algorithm.

Calculates output from setpoint, process value and PID status.

Parameters

set_point	Desired value.
measurement	Measured value.
pi_st	PI status struct.

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pi_init()

void pi_init	(	int16_t	Kp_set,
		int16_t	Ki_set,
		struct pi_t *	regulator_p
	)

Initialization of PID controller parameters.

Initialize the variables used by the PID algorithm.

Parameters

Kp	Proportional term.
Ki	Integral term.
regulator_p	Struct with PI status.

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pi_reset_integrator()

void pi_reset_integrator

(

struct pi_t *

regulator_p

)

Resets the integrator.

Calling this function will reset the integrator in the PID regulator.