I have been working on support of tag handling for the USRP source and sink blocks in gr-uhd. I will be adding some test and example code, but if anyone cares to experiment, see my uhd_features branch on jblum.git http://gnuradio.org/cgit/jblum.git/log/?h=uhd_features
Rather than describe, its easier to paste these excerpts from the docs: * RX Stream tagging: * * The following tag keys will be produced by the work function: * - pmt::pmt_string_to_symbol("rx_time") * * The timstamp tag value is a pmt tuple of the following: * (uint64 seconds, and double fractional seconds). * A timestamp tag is produced at start() and after overflows. * TX Stream tagging: * * The following tag keys will be consumed by the work function: * - pmt::pmt_string_to_symbol("tx_sob") * - pmt::pmt_string_to_symbol("tx_eob") * - pmt::pmt_string_to_symbol("tx_time") * * The sob and eob (start and end of burst) tag values are pmt booleans. * When present, burst tags should be set to true (pmt::PMT_T). * * The timstamp tag value is a pmt tuple of the following: * (uint64 seconds, and double fractional seconds). -Josh _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio