Jasper Gerth / Biquad

A simple biquad filter

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Biquad.h@2:3a80d1f8f30a, 2015-10-29 (annotated)

Committer:
Gerth
Date:
Thu Oct 29 14:03:02 2015 +0000
Revision:
2:3a80d1f8f30a
Parent:
1:11e0eb82cb18 
converted floats to doubles

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Gerth 0:ba910c57d594 1 #ifndef _BIQUAD_H_
Gerth 0:ba910c57d594 2 #define _BIQUAD_H_
Gerth 0:ba910c57d594 3
Gerth 0:ba910c57d594 4 #include "mbed.h"
Gerth 0:ba910c57d594 5
Gerth 0:ba910c57d594 6 class Biquad
Gerth 0:ba910c57d594 7 {
Gerth 0:ba910c57d594 8 public:
Gerth 0:ba910c57d594 9 ///Instantiate the biquad filter
Gerth 0:ba910c57d594 10 Biquad(void);
Gerth 0:ba910c57d594 11
Gerth 1:11e0eb82cb18 12 /**Filters the given signal with the filter values.
Gerth 2:3a80d1f8f30a 13 * @param u : double signal to filter
Gerth 2:3a80d1f8f30a 14 * @param &v1 : double variable to store previous values
Gerth 2:3a80d1f8f30a 15 * @param &v2 : double variable to store previous values
Gerth 2:3a80d1f8f30a 16 * @param a1 : double filter coefficient a1
Gerth 2:3a80d1f8f30a 17 * @param a1 : double filter coefficient a2
Gerth 2:3a80d1f8f30a 18 * @param a1 : double filter coefficient b0
Gerth 2:3a80d1f8f30a 19 * @param a1 : double filter coefficient b1
Gerth 2:3a80d1f8f30a 20 * @param a1 : double filter coefficient b2
Gerth 2:3a80d1f8f30a 21 * @return v : double filtered signal
Gerth 0:ba910c57d594 22 */
Gerth 0:ba910c57d594 23 double filter( double u, double &v1, double &v2, const double a1, const double a2,
Gerth 0:ba910c57d594 24 const double b0, const double b1, const double b2 );
Gerth 0:ba910c57d594 25 };
Gerth 0:ba910c57d594 26 #endif