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/*
Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Her Majesty the
Queen in Right of Canada (Communications Research Center Canada)
Copyright (C) 2018
Matthias P. Braendli, matthias.braendli@mpb.li
http://opendigitalradio.org
DESCRIPTION:
The part of the UHD output that takes care of the GPSDO and setting device
time.
*/
/*
This file is part of ODR-DabMod.
ODR-DabMod is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
ODR-DabMod is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with ODR-DabMod. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#ifdef HAVE_OUTPUT_UHD
#include <uhd/usrp/multi_usrp.hpp>
#include <chrono>
#include <memory>
#include <string>
#include <atomic>
#include <future>
#include "Log.h"
#include "output/SDR.h"
#include "TimestampDecoder.h"
#include "RemoteControl.h"
#include <stdio.h>
#include <sys/types.h>
namespace Output {
struct gnss_stats_t {
int num_sv = 0; // Number of Satellite Vehicles used
bool holdover = false; // True if LEA-M8F uses its internal time reference
};
class USRPTime {
public:
USRPTime( uhd::usrp::multi_usrp::sptr usrp,
SDRDeviceConfig& conf);
// Verifies the GPSDO state, that the device time is ok.
// Returns true if all ok. Needs to be called so the device
// time gets properly set.
// Should be called more often than the gps_fix_check_interval
bool verify_time(void);
gnss_stats_t get_gnss_stats(void) const;
// Wait time in seconds to get fix
static const int initial_gps_fix_wait = 180;
// Interval for checking the GPS at runtime
static constexpr double gps_fix_check_interval = 10.0; // seconds
private:
enum class gps_state_e {
/* In the bootup state, we wait for correct time lock and
* the first PPS, and then sync time.
*/
bootup,
/* Once the system is up, we check lock every now and then. If the
* fix is lost for too long, we crash.
*/
monitor_fix,
};
void check_gps();
uhd::usrp::multi_usrp::sptr m_usrp;
SDRDeviceConfig& m_conf;
gps_state_e gps_state = gps_state_e::bootup;
int num_checks_without_gps_fix = 1;
gnss_stats_t gnss_stats;
using timepoint_t = std::chrono::time_point<std::chrono::steady_clock>;
timepoint_t time_last_check;
std::future<bool> gps_fix_future;
// Returns true if we want to check for the gps_timelock sensor
bool gpsfix_needs_check(void) const;
// Return true if the gpsdo is from ettus, false if it is the ODR
// LEA-M8F board is used
bool gpsdo_is_ettus(void) const;
void set_usrp_time_from_localtime(void);
void set_usrp_time_from_pps(void);
bool check_gps_timelock(void);
bool check_gps_locked(void);
};
} // namespace Output
#endif // HAVE_OUTPUT_UHD
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