Hi, The vita_time input should be ignored. It is meant to be used with the Radio Core. For timed commands, you should instead compare the vita time from the header of incoming CHDR packets with the "set_time" signal of the settings bus. You can see an example of this with the DDC / DUC blocks, where the module axi_tag_time is used to tag samples to trigger commands at a specific vita time.
Jonathon On Wed, Apr 10, 2019 at 8:49 AM Xingjian Chen via USRP-users < usrp-users@lists.ettus.com> wrote: > Dear all, > What is the difference for vita_time between the vita_time in noc_shell > and axi_wrapper in a RFNOC module? > I noticed that there is vita_time input for noc_shell, but also a > vita_time can be included in the axi_wrapper input s_axis_data_tuser. I > guess that for noc_shell, the vita_time input is for the universal > synchronization time between modules. And the vita_time in the axi_wrapper > input s_axis_data_tuser is for schedule a future command. For example, I > can add a delay time for transmission in the header in s_axis_data_tuser in > siggen rfnoc example. > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >
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