[Discuss-gnuradio] Re: accessing packet payload in reception

[Ben Olsen]

Following up:

> (message = *access to the depths of the demodulation blocks and packet
> queues, giving me the string "desname.sourcename.str(frequency)" *)

would this be something along the lines of:

message = fun_graph.rxpath.packet_receiver._watcher.(_rcvd_pktq....)?

I get a bit lost this deep into it...

Again, thanks for any assistance
-Ben Olsen


On 4/16/07, Ben Olsen <address@hidden> wrote:
> Hello!
>
> I'm trying to implement a scheme in which I have a receiving node
> accept a frequency to tune to from a sending node, and I would
> appreciate any advice how to code this.
> I'm using the /digital/benchmark_xx.py scripts, so in Tx i've used the
> defined send_pkt function that packs a message to send like this:
>
> def send_pkt(payload='', eof=False):
>    return fun_graph.txpath.send_pkt(payload, eof)
>
> ....
> fun_graph = transmit_graph(mods[options.modulation], options)
> ...
>
> send_pkt("%s.%s.%s" % (destname, sourcename, str(frequency) )
>
> send_pkt(eof=True)
>
> Is this a good way to send such a payload? Next I'd like to get the
> values destname, sourcename, and frequency out of the received packet
> at the receiving node, but I'm not sure which blocks/functions to call
> on to access these. What i'll do with the received message is
> something along the lines of:
>
> (message = *access to the depths of the demodulation blocks and packet
> queues, giving me the string "desname.sourcename.str(frequency)" *)
>
> parsed = message.split('.', 3) # to tokenize the message between the '.'
>
> # now tune to parsed[2]....
>
> I'd appreciate any help very much!
>
> Thanks,
>
> Ben Olsen