mirror of https://github.com/rusefi/bldc.git
50 lines
1.7 KiB
C
50 lines
1.7 KiB
C
/*
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Copyright 2016 Benjamin Vedder benjamin@vedder.se
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This file is part of the VESC firmware.
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The VESC firmware is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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The VESC firmware is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef DIGITAL_FILTER_H_
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#define DIGITAL_FILTER_H_
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#include <stdint.h>
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typedef struct{
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float a0, a1, a2, b1, b2;
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float z1, z2;
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} Biquad;
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typedef enum {
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BQ_LOWPASS,
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BQ_HIGHPASS
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} BiquadType;
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// Functions
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void filter_fft(int dir, int m, float *real, float *imag);
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void filter_dft(int dir, int len, float *real, float *imag);
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void filter_fftshift(float *data, int len);
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void filter_hamming(float *data, int len);
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void filter_zeroPad(float *data, float *result, int dataLen, int resultLen);
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void filter_create_fir_lowpass(float *filter_vector, float f_break, int bits, int use_hamming);
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float filter_run_fir_iteration(float *vector, float *filter, int bits, uint32_t offset);
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void filter_add_sample(float *buffer, float sample, int bits, uint32_t *offset);
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float biquad_process(Biquad *biquad, float in);
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void biquad_config(Biquad *biquad, BiquadType type, float Fc);
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void biquad_reset(Biquad *biquad);
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#endif /* DIGITAL_FILTER_H_ */
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