Biquad.h

00001 #ifndef _BIQUAD_H_
00002 #define _BIQUAD_H_
00003 
00004 #include "mbed.h"
00005 
00006 class Biquad
00007 {
00008 public:
00009     ///Instantiate the biquad filter
00010     Biquad(void);
00011 
00012     /**Filters the given signal with the filter values.
00013     * @param u : double signal to filter
00014     * @param &v1 : double variable to store previous values
00015     * @param &v2 : double variable to store previous values
00016     * @param a1 : double filter coefficient a1
00017     * @param a1 : double filter coefficient a2
00018     * @param a1 : double filter coefficient b0
00019     * @param a1 : double filter coefficient b1
00020     * @param a1 : double filter coefficient b2
00021     * @return v : double filtered signal
00022     */
00023     double filter( double u, double &v1, double &v2, const double a1, const double a2,
00024                    const double b0, const double b1, const double b2 );
00025 };
00026 #endif