uas_timesync.cpp

Go to the documentation of this file.

/*
 * Copyright 2014,2017 Vladimir Ermakov, M.H.Kabir.
 *
 * This file is part of the mavros package and subject to the license terms
 * in the top-level LICENSE file of the mavros repository.
 * https://github.com/mavlink/mavros/tree/master/LICENSE.md
 */

#include <array>
#include <unordered_map>
#include <stdexcept>
#include <mavros/mavros_uas.h>
#include <mavros/utils.h>
#include <mavros/px4_custom_mode.h>

using namespace mavros;


/* -*- time syncronise functions -*- */

static inline ros::Time ros_time_from_ns(const uint64_t stamp_ns) {
        return ros::Time(
                stamp_ns / 1000000000UL,                // t_sec
                stamp_ns % 1000000000UL);               // t_nsec
}

ros::Time UAS::synchronise_stamp(uint32_t time_boot_ms) {
        // copy offset from atomic var
        uint64_t offset_ns = time_offset;

        if (offset_ns > 0 || tsync_mode == timesync_mode::PASSTHROUGH) {
                uint64_t stamp_ns = static_cast<uint64_t>(time_boot_ms) * 1000000UL + offset_ns;
                return ros_time_from_ns(stamp_ns);
        }
        else
                return ros::Time::now();
}

ros::Time UAS::synchronise_stamp(uint64_t time_usec) {
        uint64_t offset_ns = time_offset;

        if (offset_ns > 0 || tsync_mode == timesync_mode::PASSTHROUGH) {
                uint64_t stamp_ns = time_usec * 1000UL + offset_ns;
                return ros_time_from_ns(stamp_ns);
        }
        else
                return ros::Time::now();
}