Re: [Discuss-gnuradio] Calling usrp_source block function from other block

Thanks Tom, that gives me a good starting point. 

-Doug

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From: trondeau@trondeau.com [trondeau@trondeau.com] on behalf of Tom Rondeau [tom@trondeau.com]
Sent: Tuesday, February 17, 2015 1:47 PM
To: Anderson, Douglas J.
Cc: GNURadio Discussion 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. <danderson@its.bldrdoc.gov> 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