Hi Samuel, luckily, these days, segfaults are rather rare in stock GNU Radio, and UHD.
Can you share your exact flowgraph, or a GDB-generated backtrace, with us? Best regards, Marcus On Wed, 2018-12-05 at 10:31 +0100, samuel verdon via USRP-users wrote: > Hello, > > I’m trying to command my usrp B200mini via its command port. I used > the documentation from here: > https://www.gnuradio.org/doc/doxygen/page_uhd.html > > here is my command: > pmt::pmt_t command = pmt::make_dict(); > command = pmt::dict_add(command, pmt::mp("gain"), > pmt::mp(gain)); // Specify gain > command = pmt::dict_add(command, pmt::mp("antenna"), > pmt::mp("TX/RX")); // Switch antenna > command = pmt::dict_add(command, pmt::mp("chan"), > pmt::mp(0)); // Specify channel > message_port_pub(pmt::mp("cmd") , command); > > I connect my block to a debug message block, and I received this > > ************MESSAGE DEBUG PRINT*************** > ((chan. 0) (antenna, TX/RX) (gain, 63)) > > But when I connect to the “UHD: USRP sink” I get a segmentation > fault… ☹ > I have tried different command always the same problem. > Can someone show me an example working with tis command? > I am quite deseparate.. > > Ubuntu 16.04 > Gnuradio 3.7.12 > UHD driver UHD_3.11 > > Thank you for your help > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com _______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
