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Function rc_filter_butterworth_highpass

Function Documentation

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

Creates a Butterworth high 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.