I am trying to read incoming RX timestamps from the UHD sample stream. I'd like to calculate the approximate time a preamble is received in the OFDM code.
The issue is that, despite getting incoming frames and preambles, I do not seem to be getting timestamp values. I use get_tags_in_range() on "rx_time": https://github.com/gnychis/grforwarder/blob/8f8c4e6cf79a2d635a0eb3bcad9b5ab325f1e373/gr-digital/lib/digital_ofdm_sampler.cc#L78 However, the size of the rx_time tags is consistently zero: https://github.com/gnychis/grforwarder/blob/8f8c4e6cf79a2d635a0eb3bcad9b5ab325f1e373/gr-digital/lib/digital_ofdm_sampler.cc#L99 The output of the OFDM receiver code: ok: True pktno: 637 n_rcvd: 18 n_right: 17 got a preamble, size of time_tags: 0 ok: True pktno: 638 n_rcvd: 19 n_right: 18 got a preamble, size of time_tags: 0 ok: True pktno: 639 n_rcvd: 20 n_right: 19 got a preamble, size of time_tags: 0 ... Is there something I am missing to enable the RX timestamp on the incoming samples, or am I not properly reading the stream tag? My branch came from the GR master 4 days ago (309ca769af). Thanks a bunch. - George
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