Re: [Discuss-gnuradio] Obtaining 'time_spec' from Out-of-tree C++ Module

[Marcus Müller]

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 <address@hidden> 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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