a5890cbe98
This servo uses linear regression to estimate current time and frequency error. The number of points used in the regression is variable (from 4 to 64 in powers of 2) and is selected by a long-term statistic of the prediction error. Future improvements could include tracking of sudden frequency changes (e.g. due to temperature variations), better stability of the error statistic when a large offset is corrected, options to set the speed of the adaptation, minimum and maximum number of points, or an option to prefer frequency accuracy over time accuracy. Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
27 lines
931 B
C
27 lines
931 B
C
/**
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* @file linreg.h
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* @note Copyright (C) 2014 Miroslav Lichvar <mlichvar@redhat.com>
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*
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* This program 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 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef HAVE_LINREG_H
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#define HAVE_LINREG_H
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#include "servo.h"
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struct servo *linreg_servo_create(int fadj);
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#endif
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