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
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