CMST / Mbed 2 deprecated ELEC347_Coursework

V001. 2017_11_30 10:21 Working code from Tuesday's lab session.

Dependencies:   mbed-rtos mbed

Fork of 2017_11_28_ELEC347_Coursework by Chris Hills

DSP Coursework ELEC347 2017-2018 Group members: Matthew Thewsey, Thomas Morris, Samuel Waggett, Christopher Hills .

Filter.hpp@11:7efb6e4759cc, 2017-12-02 (annotated)

Committer:
thomasmorris
Date:
Sat Dec 02 13:35:40 2017 +0000
Revision:
11:7efb6e4759cc
Parent:
7:6cb27cce4c50
Child:
13:db76473a3d76
Commented Version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mwthewsey 0:d39a06ca6bf1 1 class FILTER
mwthewsey 0:d39a06ca6bf1 2 {
mwthewsey 0:d39a06ca6bf1 3 private:
mwthewsey 0:d39a06ca6bf1 4
mwthewsey 0:d39a06ca6bf1 5 int _Fs;
mwthewsey 0:d39a06ca6bf1 6 int _Fo;
mwthewsey 2:f6e49378dd8a 7 double _Boost;
mwthewsey 0:d39a06ca6bf1 8 int _Q;
mwthewsey 2:f6e49378dd8a 9 double _Wo_d;
mwthewsey 2:f6e49378dd8a 10 double _Wo_d2;
mwthewsey 2:f6e49378dd8a 11 float _Com_Den;
thomasmorris 11:7efb6e4759cc 12 float _NC0,_NC1,_NC2,_DC1,_DC2;
mwthewsey 2:f6e49378dd8a 13
mwthewsey 2:f6e49378dd8a 14 float _FilterOutput;
mwthewsey 0:d39a06ca6bf1 15 float _centreTap; //internal node of filter
mwthewsey 0:d39a06ca6bf1 16 float _b0;
mwthewsey 0:d39a06ca6bf1 17 float _b1;
mwthewsey 0:d39a06ca6bf1 18 float _b2;
mwthewsey 0:d39a06ca6bf1 19 float _b3;
mwthewsey 0:d39a06ca6bf1 20 float _b4;
mwthewsey 0:d39a06ca6bf1 21
mwthewsey 0:d39a06ca6bf1 22 // A - Denominator coefficients
mwthewsey 0:d39a06ca6bf1 23 float _a0;
mwthewsey 0:d39a06ca6bf1 24 float _a1;
mwthewsey 0:d39a06ca6bf1 25 float _a2;
mwthewsey 0:d39a06ca6bf1 26 float _a3;
mwthewsey 0:d39a06ca6bf1 27 float _a4;
mwthewsey 0:d39a06ca6bf1 28
thomasmorris 11:7efb6e4759cc 29 //Filter Parameters
mwthewsey 0:d39a06ca6bf1 30 float _G;
mwthewsey 0:d39a06ca6bf1 31 float _k;
mwthewsey 0:d39a06ca6bf1 32 float _Wo;
thomasmorris 11:7efb6e4759cc 33
thomasmorris 11:7efb6e4759cc 34 //Filter input Variables
thomasmorris 11:7efb6e4759cc 35
thomasmorris 11:7efb6e4759cc 36 float _xn;//Current Filter input valuew
thomasmorris 11:7efb6e4759cc 37 float _xnm1;//Old filter inputs
mwthewsey 0:d39a06ca6bf1 38 float _xnm2;
mwthewsey 0:d39a06ca6bf1 39 float _xnm3;
mwthewsey 0:d39a06ca6bf1 40 float _xnm4;
mwthewsey 0:d39a06ca6bf1 41
thomasmorris 11:7efb6e4759cc 42 //Filter Output Variables
thomasmorris 11:7efb6e4759cc 43
thomasmorris 11:7efb6e4759cc 44 float _yn;//Current Filter Output Value
mwthewsey 0:d39a06ca6bf1 45 float _ynm1;
mwthewsey 0:d39a06ca6bf1 46 float _ynm2;
mwthewsey 0:d39a06ca6bf1 47 float _ynm3;
mwthewsey 0:d39a06ca6bf1 48 float _ynm4;
mwthewsey 0:d39a06ca6bf1 49
mwthewsey 0:d39a06ca6bf1 50
mwthewsey 0:d39a06ca6bf1 51 public:
thomasmorris 11:7efb6e4759cc 52 FILTER(int Fs, int Fo, double Boost, int Q);//Constuctor
thomasmorris 11:7efb6e4759cc 53 ~FILTER();//Destuctor
mwthewsey 0:d39a06ca6bf1 54
thomasmorris 11:7efb6e4759cc 55 void Define_Filter();//Calculates the coefficeints of the filter
thomasmorris 11:7efb6e4759cc 56 void Print_Filter();//Print Filter Coefficients
chills 7:6cb27cce4c50 57
mwthewsey 2:f6e49378dd8a 58 //Setters
thomasmorris 11:7efb6e4759cc 59
thomasmorris 11:7efb6e4759cc 60 void setvalue(float RAW_input);//Sets the latest xn sample input value
thomasmorris 11:7efb6e4759cc 61 void Update_Boost(double Boost_New);//Updates the Boost Value
thomasmorris 11:7efb6e4759cc 62 void Update_Q(int Q_New);//Sets the Value of Q
thomasmorris 11:7efb6e4759cc 63 void Update_Fo(int Fo_New);//Update Centre Frequency
mwthewsey 0:d39a06ca6bf1 64
mwthewsey 2:f6e49378dd8a 65 //Getters
thomasmorris 11:7efb6e4759cc 66 float getvalue(void);//returns yn
thomasmorris 11:7efb6e4759cc 67 double Get_Boost();//Gets the Boost Value
thomasmorris 11:7efb6e4759cc 68 int Get_Q();//Gets the value of Q
thomasmorris 11:7efb6e4759cc 69 int Get_Fo(); //Gets the current value of Centre Frequency
mwthewsey 0:d39a06ca6bf1 70 };
mwthewsey 0:d39a06ca6bf1 71
mwthewsey 0:d39a06ca6bf1 72
thomasmorris 11:7efb6e4759cc 73