Calling usrp_source block function from other block

GNU Radio
1

Hi all,

I’m looking for the best way to retune the USRP from another block in a
running flowgraph. I’ve seen the tune callback method used by
bin_statistics_f, but I was wondering if there are other ways to do it.
I took a look at message passing
(http://gnuradio.org/doc/doxygen/page_msg_passing.html), but I’m not
sure how to bind usrp_source’s set_center_freq to handle a freq passed
by message, etc.

Are there any examples of doing this laying around or is
bin_statistics_f’s tune callback still the best way to do it?

-Doug

2

On Tue, Feb 17, 2015 at 11:52 AM, Anderson, Douglas J. <
[email protected]> wrote:

Are there any examples of doing this laying around or is
bin_statistics_f’s tune callback still the best way to do it?

-Doug

Hi Doug,

Take a look at the UHD page:

http://gnuradio.org/doc/doxygen/page_uhd.html

The existing command message interface to the UHD block’s already allows
you to set the frequency with a message. This manual page will tell you
how
to format that message properly.

Tom

3

Thanks Tom, that gives me a good starting point.

-Doug

From: [email protected] [[email protected]] on behalf of Tom
Rondeau [[email protected]]
Sent: Tuesday, February 17, 2015 1:47 PM
To: Anderson, Douglas J.
Cc: GNURadio D.ion List
Subject: Re: [Discuss-gnuradio] Calling usrp_source block function from
other block

On Tue, Feb 17, 2015 at 11:52 AM, Anderson, Douglas J.
<[email protected]mailto:[email protected]> wrote:
Hi all,

I’m looking for the best way to retune the USRP from another block in a
running flowgraph. I’ve seen the tune callback method used by
bin_statistics_f, but I was wondering if there are other ways to do it.
I took a look at message passing
(http://gnuradio.org/doc/doxygen/page_msg_passing.html), but I’m not
sure how to bind usrp_source’s set_center_freq to handle a freq passed
by message, etc.

Are there any examples of doing this laying around or is
bin_statistics_f’s tune callback still the best way to do it?

-Doug

Hi Doug,

Take a look at the UHD page:

http://gnuradio.org/doc/doxygen/page_uhd.html

The existing command message interface to the UHD block’s already allows
you to set the frequency with a message. This manual page will tell you
how to format that message properly.

Tom