Hi Marcus!
get_time_now is a public function of usrp_sink, it is accessible from
everywhere 
Great, I thought it was a public function, just wasn’t sure how to get a
pointer to it.
uhd::time_spec_t now = my_usrp_sink->get_time_now();
Sure thing.
You’ll need a (shared) pointer to that usrp_sink
I am not clear how I obtain that (to then I pass it to my C++ module as
a constructor?)
Regards,
David
From: Marcus Müller [[email protected]]
Sent: 30 April 2014 14:37
To: David Halls
Cc: [email protected]
Subject: Re: [Discuss-gnuradio] Obtaining ‘time_spec’ from Out-of-tree
C++ Module
Hello David,
as get_time_now is a public function of usrp_sink, it is accessible from
everywhere
You’ll need a (shared) pointer to that usrp_sink;using that, you can do
something like
uhd::time_spec_t now = my_usrp_sink->get_time_now();
You could, for example, take an usrp_sink::sptr as an argument for your
block’s constructor and store that reference to use it later in your
work() function.
Greetings,
Marcus
On Wed, Apr 30, 2014 at 2:26 PM, David Halls
<[email protected]mailto:[email protected]>
wrote:
Dear All,
I would like to have knowledge of the USRP time in my transmitter flow
graph. In the receiver flow graph this is straight forward because
‘rx_time’ tag is propagated from a USRP source as a tag.
How can I obtain the time_spec from a c++ block in my transmitter flow
graph?
“usrp_sink_impl.cc” has the function
::uhd::time_spec_t
usrp_sink_impl::get_time_now(size_t mboard)
{
return _dev->get_time_now(mboard);
}
But how can I call this from outside the usrp_sink block?
Many thanks!
David
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