#include "PIDAlgo.h"

float PIDAlgorithmCalculation(float _setPoint,float _mesuredParam , PID_Config_Params *params, float *_pre_error, float *_integral)
{
	float error;
	float derivative;
	float output;

	//Calculate P,I,D
	error = _setPoint - _mesuredParam;

	//In case of error too small then stop integration
	if(abs(error) > params->epsilon)
	{
		*_integral = *_integral + error*params->dt;
	}

	derivative = (error - *_pre_error)/params->dt;

	output = params->Kp*error + params->Ki**_integral + params->Kd*derivative;

	//Saturation Filter
	if(output > params->MAX)
	{
		output = params->MAX;
	}
	else if(output < params->MIN)
	{
		output = params->MIN;
	}

	//Update error
	*_pre_error = error;

	return output;
}