OK, I will check that, thank you very much!
Marcus D. Leech <[email protected]> 于2021年10月5日周二 下午4:22写道： > On 2021-10-05 10:55 a.m., Huang Wei wrote: > > Hi Marcus, > > > > Initially when I create the USRP object, I synchronize USRP to > > external PPS though self.usrp1.set_time_next_pps(round(time.time())+1) > > method. > > and in the function get_start(), I wrote like: > > self.stop() > > self.wait() > > self.disconnect_all() > > #self.usrp1.stop() > > #self.usrp1.start() > > self.usrp1.set_start_time(self.usrp1.get_time_now() + > > uhd.time_spec_t(5)) > > self.connect(...) > > self.connect(...) > > self.connect(filesink, self.usrp1) > > self.start > > I wish the USRP stops, and restarts transmission 5 sec later every > > time I run the get_start() function. But the USRP doesn't stop, and > > will produces LLLLLLLLLL on the screen after around 5 sec. If I use > > " self.usrp1.set_command_time(self.usrp1.get_time_now() + > > uhd.time_spec_t(5))" instead of set_start_time(), it does stop > > transmission for 5 sec and start, but it's not the correct command for > > start time. > > > > Do you have any advice how can I make it work? > > I appreciate all your help! > > > > Best regards, > > Wei > > > I suspect that you're better off looking into tagged streams in Gnu > Radio that support "bursty" transmission: > > https://www.gnuradio.org/doc/doxygen/classgr_1_1uhd_1_1usrp__sink.html > > You may get more help on that from the discuss-gnuradio mailing list. > >
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