Marcus, thank you for that advice. I was concerned that making the calls through the gr-uhd would give the same problems I was experiencing with the tagged stream but upon closer inspection it makes calls directly to the uhd::usrp::multi_usrp.
Upon second glance using the gr-uhd would be the better approach! The functions I need are available. I did resolve my original problem: Here was my error: - d_usrp = boost::dynamic_pointer_cast<gr::uhd::usrp_sink::sptr>(blk); + d_usrp = boost::dynamic_pointer_cast<gr::uhd::usrp_sink>(blk); Jeff ________________________________ From: Marcus D Leech <[email protected]> Sent: Tuesday, October 27, 2020 12:48 PM To: Hodges, Jeff Cc: [email protected] Subject: Re: [USRP-users] C++ how to get usrp::multi_usrp::sptr from USRP_Sink_Block Are you sure the calls you need aren’t already available in the gr-UHD wrapper? Some parts of gr-UHD aren’t visible in GRC based flows but are still in the gr-UHD API, and if you were just using the straight Python programming model you could use them directly. Sent from my iPhone On Oct 27, 2020, at 12:25 PM, Hodges, Jeff via USRP-users <[email protected]> wrote: How do I get the device sptr (::uhd::usrp::multi_usrp::sptr) from the usrp_sink_block sptr? For example, the following works: basic_block_sptr blk = global_block_registry.block_lookup(pmt::intern(usrp_alias)); d_usrp = boost::dynamic_pointer_cast<gr::uhd::usrp_sink::sptr>(blk); But errors here: ::uhd::usrp::multi_usrp::sptr d_usrp_dev = d_usrp->get_device(); What happens if I just create another usrp object for the same device in addition to the one already created by the uhd_sink_block? I'm guessing that will not work. My end goal is to be able to create a block that makes direct C++ api calls to the usrp to tune it between bursts, since the uhd (for unknown reasons) does not support timed command tuning on a tagged stream in burst mode (as i mentioned in yesterday's email). Jeff _______________________________________________ USRP-users mailing list [email protected] http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
_______________________________________________ USRP-users mailing list [email protected] http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
