Re: [Discuss-gnuradio] Some new 802.15.4 stuff

[Tom Rondeau]

On Mon, Apr 15, 2013 at 8:34 AM, Bastian Bloessl
<address@hidden> wrote:
> Hi all,
>
> I played a bit around with the 802.15.4 blocks [1]. Maybe someone is
> interested.
>
> The changes are:
> - It has a transceiver flow graph. (That was really easy with the new PDU to
> tagged stream block)
> - annotate LQI value in dict of PDUs
> - CRC check
> - Wireshark Connector. You can write received packets in a pcap file, that
> can be read by Wireshark, which has 802.15.4 dissectors.
> - and the coolest thing: the whole encoding is now done with standard GNU
> Radio blocks. This includes pulse shaping and the byte to chunk to chip to
> symbol mapping. It's really cool what you can do with plain GNU Radio.
>
> I tested interoperability it with TelosB motes. I guess it compiles only on
> Linux due to the gettimeofday(?) call.
> Maybe I messed up my installation as I tried the next branch and didn't
> uninstall it cleanly. Now some block names are appended with '(old)'. I hope
> the flow graphs work nevertheless.

Hi Bastian,

First, great work!

So can you point out where that gettimeofday call is being made? We
should be dealing with that situation in cmake, so if something's
going wrong, let us know.

And the '(old)' block were recently discussed in a mailing list post
from a couple of weeks ago. This is just us telling you that these are
the old-style blocks in 3.6. They will still work for the time being,
but if you upgrade to 3.7, they will have disappeared. The (old)
indication is so that you can switch them out with the new blocks that
are functionally equivalent but now in the 3.7 style so they can be
future compatible when updating to 3.7.

Hope this helps,
Tom



> Have fun,
> Bastian
>
> [1] https://github.com/bastibl/gr-ieee802-15-4
>
> --
> Dipl.-Inform. Bastian Bloessl
> Institute of Computer Science
> University of Innsbruck, Austria
> Phone: +43 512 507-53288 / Fax: -53079
> http://ccs.uibk.ac.at/~bloessl/