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https://github.com/fairwaves/UHD-Fairwaves.git
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8cef0f4c6c
We will then disable forced TCXO DAC setting by UHD host library. This way we avoid de-calibration on every UHD restart in case of operational GPSDO. Setting GPSDO LPF to the current calculated frequency after setting the DAC maually should help GPSDO to converge faster. Right now it starts really slow, because it starts from a perfect target value.
47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
/*
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* Copyright 2012 Sylvain Munaut <tnt@246tNt.com>
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* Copyright 2017 Alexander Chemeris <Alexander.Chemeris@fairwaves.co>
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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 3 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
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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 INCLUDED_GPSDO_H
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#define INCLUDED_GPSDO_H
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void gpsdo_init(void);
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/* Enable/disable GPSDO debug printing */
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void gpsdo_set_debug(int level);
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/* Set value of the VCTCXO DAC */
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void gpsdo_set_dac(uint16_t v);
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/* Get the current VCTCXO DAC value */
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uint16_t gpsdo_get_dac(void);
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/* Get the last calculated VCTCXO frequency */
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uint32_t gpsdo_get_last_freq(void);
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/* Get the last alpha/8 filtered VCTCXO frequency (29.3 fixed point) */
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uint32_t gpsdo_get_lpf_freq(void);
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/* Get time (seconds part) of the last PPS pulse */
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uint32_t gpsdo_get_last_pps_secs(void);
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/* Get time (ticks part) of the last PPS pulse */
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uint32_t gpsdo_get_last_pps_ticks(void);
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#endif /* INCLUDED_GPSDO_H */
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