Function rc_filter_butterworth_lowpass

• Defined in File filter.h

Function Documentation

int rc_filter_butterworth_lowpass(rc_filter_t *f, int order, double dt, double wc)

Creates a Butterworth low pass filter of specified order and cutoff frequency.

Any existing memory allocated for f is freed safely to avoid memory leaks and new memory is allocated for the new filter.

Parameters:

• f – [out] Pointer to user’s rc_filter_t struct

• order – [in] The order (>=1)

• dt – [in] desired timestep of discrete filter in seconds

• wc – [in] Cuttoff freqauency in rad/s

Returns:

Returns 0 on success or -1 on failure.