Re: [Discuss-gnuradio] Editing benchmark_rx.py for spectrum access

[Dan Rosenqvist]

Ali Siddiqi wrote:
> 
> Hi,
> Did the flowgraph of the code (in which you added the timeout) involved
> receive_path???
> 
> Regards,
> Ali
> 
> On Mon, Aug 3, 2009 at 11:21 AM, Dan Rosenqvist <address@hidden> wrote:
> 
>>
>>
>>
>> Umair Nasir wrote:
>> >
>> > Hi all,
>> >
>> > This question is asked a number of times. And I believe it shouldn't be
>> > that
>> > tough. Somebody explain where to put this logic in benchmark_rx.py
>> >
>> > If no data received
>> >             set freq to freq number 2
>> > else
>> >             stay on the current freq
>> >
>> >
>> > Waiting for a response.
>> >
>> >
>> >
>> >
>> >
>> >
>> > --
>> > Umair
>> >
>> > _______________________________________________
>> > Discuss-gnuradio mailing list
>> > address@hidden
>> > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>> >
>> >
>>
>> Hi,
>>
>> I've done this (not in benchmark_rx) by simply adding a timeout
>> (utilizing
>> wxpython see Timer) and a global variable that keeps track of which
>> frequency to switch to. If no data is received before the timeout, I
>> simply
>> switch to freq 2.
>>
>> Regards,
>> Dan
>> --
>> View this message in context:
>> http://www.nabble.com/Editing-benchmark_rx.py-for-spectrum-access-tp24528535p24785911.html
>> Sent from the GnuRadio mailing list archive at Nabble.com.
>>
>>
>>
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>>
> 
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> 
> 

Hi,

Here's a short cut-out with the code I've used:

---------------------------------
class transceiver(gr.top_block):
    def __init__(self, rx_callback):
        gr.top_block.__init__(self)
        self.usrp_decim = 16
        u=usrp.source_c(0, self.usrp_decim) 
        self.rxpath=oqpsk_rx_graph(rx_callback,u)
        self.connect(self.rxpath)
        self.txpath=transmit_path()
        self.connect(self.txpath)
        

class cs_mac(wx.Frame):
    def __init__(self, parent, id, title):
        wx.Frame.__init__(self, parent, id, title, size=(0, 0))
        self.SenseTimer=wx.Timer(self, id=0)
        self.Bind(wx.EVT_TIMER, self.OnSenseTimer, id=0)
        
    def OnSenseTimer(self,event):
        tb.rxpath.u.tune(tb.rxpath.subdev._which, tb.rxpath.subdev,
2405000000+(op.current_channel-11)*5000000)
    
class ieee_transceiver(wx.App):
    def OnInit(self):
        global tb
        global frame
        
        frame=cs_mac(None, -1, '')
        
        tb=transceiver(frame.rx_callback)
        
        frame.Show(False)
        try:
            tb.start() 
        except:
            print "start except"
        return True

if __name__ == '__main__':
    try:
        application=ieee_transceiver(0)
        application.MainLoop()
    except KeyboardInterrupt:
        pass

--------------------

As you can see the timer will change rx-frequency on timeout. Hope this code
will be helpful even though it's poorly commented.

Regards,
Dan
-- 
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