Thijs van Aalten / Filters

ya kno it

filter.h@1:db5970567c4d, 2017-10-27 (annotated)

Committer:
Thijs12va
Date:
Fri Oct 27 12:48:46 2017 +0000
Revision:
1:db5970567c4d
Parent:
0:09ae59836ddc 
changed omega

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Thijs12va 0:09ae59836ddc 1 #ifndef FILTERJWZ
Thijs12va 0:09ae59836ddc 2 #define FILTERJWZ
Thijs12va 0:09ae59836ddc 3
Thijs12va 0:09ae59836ddc 4 #include "mbed.h"
Thijs12va 0:09ae59836ddc 5 //#include <math.h>
Thijs12va 0:09ae59836ddc 6
Thijs12va 0:09ae59836ddc 7 class LowPass{
Thijs12va 0:09ae59836ddc 8 public:
Thijs12va 0:09ae59836ddc 9 float yprev;
Thijs12va 0:09ae59836ddc 10 float a;
Thijs12va 0:09ae59836ddc 11
Thijs12va 0:09ae59836ddc 12 float filter(float x);
Thijs12va 0:09ae59836ddc 13 };
Thijs12va 0:09ae59836ddc 14
Thijs12va 0:09ae59836ddc 15 class HighPass{
Thijs12va 0:09ae59836ddc 16 public:
Thijs12va 0:09ae59836ddc 17 float xprev[2]; // to remember the 2 previous input values
Thijs12va 0:09ae59836ddc 18 float yprev; // to remember the previous output value
Thijs12va 0:09ae59836ddc 19 float a; /*RC / (RC + dt)*/
Thijs12va 0:09ae59836ddc 20
Thijs12va 0:09ae59836ddc 21 float filter(float x);
Thijs12va 0:09ae59836ddc 22 };
Thijs12va 0:09ae59836ddc 23
Thijs12va 0:09ae59836ddc 24 class Notch{
Thijs12va 0:09ae59836ddc 25 public:
Thijs12va 0:09ae59836ddc 26 float xprev[3];
Thijs12va 0:09ae59836ddc 27 float yprev[2];
Thijs12va 0:09ae59836ddc 28 float lambda;
Thijs12va 0:09ae59836ddc 29 float b;
Thijs12va 0:09ae59836ddc 30
Thijs12va 0:09ae59836ddc 31 float filter(float x);
Thijs12va 0:09ae59836ddc 32 };
Thijs12va 0:09ae59836ddc 33
Thijs12va 0:09ae59836ddc 34 class ButterLow{
Thijs12va 0:09ae59836ddc 35 public:
Thijs12va 0:09ae59836ddc 36 float xprev[3];
Thijs12va 0:09ae59836ddc 37 float yprev[2];
Thijs12va 0:09ae59836ddc 38 float w; //wc: cutoff frequency
Thijs12va 0:09ae59836ddc 39
Thijs12va 0:09ae59836ddc 40 float filter(float x);
Thijs12va 0:09ae59836ddc 41 };
Thijs12va 0:09ae59836ddc 42
Thijs12va 0:09ae59836ddc 43 #endif