On Mon, Apr 29, 2013 at 12:53 PM, Sam mite <mite.eng...@gmail.com> wrote:
> > On Fri, Apr 26, 2013 at 10:15 AM, Josh Blum <j...@joshknows.com> wrote: > >> >> > File "/home/s/tdm/tdma_radio.py", line 70, in __init__ >> > freq=freq, >> > File "/home/s/.grc_gnuradio/tdma_hier.py", line 76, in __init__ >> > self.tdma_engine = >> > >> precog.tdma_engine(initial_slot,slot_interval,guard_interval,number_of_slots,lead_limit,link_speed) >> > File "/usr/local/lib/python2.7/dist-packages/precog/tdma_engine.py", >> line >> > 100, in __init__ >> > self.set_tag_propagation_policy(extras_swig.TPP_DONT) >> > NameError: global name 'extras_swig' is not defined >> > >> >> Looks like an import got removed from that file, but I dont think its >> needed. >> >> try changing this trouble line to >> >> self.set_tag_propagation_policy(gnuradio.extras.TPP_DONT) >> >> Or if that doesnt work >> >> from gnuradio import extras >> self.set_tag_propagation_policy(extras.TPP_DONT) >> >> -josh >> > > Thanks that solved the problem. tdma_radio.grc ran without any error with > output as follows: > > > UHD Warning: > The send buffer could not be resized sufficiently. > Target sock buff size: 1048576 bytes. > Actual sock buff size: 1000000 bytes. > See the transport application notes on buffer resizing. > Please run: sudo sysctl -w net.core.wmem_max=1048576 > -- 1) catch time transition at pps edge > -- 2) set times next pps (synchronously) > -- 1) catch time transition at pps edge > -- 2) set times next pps (synchronously) > >>> gr_fir_fff: using SSE > > How can I use tdma_engine in my following FSK flow graph; > > TX Flow graph: > File source ---> Packet Encoder ---> pack to unpack/chunks to symbol --> > upsample by 8---> Freq Mod---> USRP > > Lets say USRP sampling rate is 500k. > > I want USRP to transmit for 1 second and then wait for 2 second (in these > two seconds two other same type of transmitters would transmit)and this > process should continue. Can I do that? Where should I place this > "tdma_engine" block. And what would be the values for its parameters? > > Thanks for the time. > > -- > > Best Regards, > > Sam > Any thoughts or comments on this, please. Anyone done this before? -- Best Regards, Sam
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