On 04/25/2018 01:30 PM, Hojoon Yang via USRP-users wrote:
The questions were not about time_spec_t and get_real_secs()..
I wondered that "How can I execute the command usrp->get_time_now();
and usrp2->get_time_now(); simultaneously.
As I mentioned the previous question, I tried to use
set_command_time(), but it does not work.
the code that I tried is
---------------------------------------------------------------
usrp->set_time_next_pps(uhd::time_spec_t(0.0));
usrp2->set_time_next_pps(uhd::time_spec_t(0.0));
boost::this_thread::sleep(boost::posix_time::seconds(2));
uhd::time_spec_t start_time = usrp->get_time_now() +
uhd::time_spec_t(0.3);
usrp->set_command_time(start_time);
uhd::time_spec_t usrp_t = usrp->get_time_now();
uhd::time_spec_t usrp2_t = usrp2->get_time_now();
usrp->clear_command_time();
You're only doing timed commands on one of the devices -- the other one
will simply sail through.
Given the semantics of timed commands, I'm not sure it's possible to do
exactly what you want, and not sure it even applies to get_time_now().
I think the best approach is to do the set_time_next_pps() as you have
done, then check the sample streams for time alignment, as I previously
suggested.
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