!
It was this line that I needed:
self.uhd_usrp_source_0.set_subdev_spec("A:RX1 A:RX2", 0)
Also, I had to update my UHD drivers. Must've been broken somewhere.
Thanks!
SW
mleech wrote:
>
> On 25/02/12 09:00 PM, shea_watson wrote:
>> Now i'm getting another error that i wasn't getting before...
>>
>> Exception in thread Thread-2:
>> Traceback (most recent call last):
>> File "/usr/lib/python2.7/threading.py", line 552, in __bootstrap_inner
>> self.run()
>> File "./runDTVPos.py", line 333, in run
>> tb = collect_double_tb(f0,filename0,f1,filename1,nsamples)
>> File
>> "/home/shea/Dropbox/SDP/Shea/DTVPos/Code/USRP_collection_double.py",
>> line 38, in __init__
>> channels=range(2),
>> File "/usr/local/lib/python2.7/dist-packages/gnuradio/uhd/__init__.py",
>> line 112, in constructor_interceptor
>> return old_constructor(*args)
>> File "/usr/local/lib/python2.7/dist-packages/gnuradio/uhd/uhd_swig.py",
>> line 2826, in usrp_source
>> return _uhd_swig.usrp_source(*args)
>> RuntimeError: Operation not permitted
>>
>> Am I not calling the constructor for the source right?
>>
>>
> This GRC flow-graph works just fine with two TVRX2 channels, albeit,
> specifying a B100 platform.
> (I've attached them).
>
>
> This is with the latest UHD + Gnu Radio, fresh from GIT as of a couple
> of days ago.
>
>
> --
> Principal Investigator
> Shirleys Bay Radio Astronomy Consortium
> http://www.sbrac.org
>
>
>
> #!/usr/bin/env python
> ##################################################
> # Gnuradio Python Flow Graph
> # Title: Dual Tvrx2 Test
> # Generated: Sat Feb 25 21:28:10 2012
> ##################################################
>
> from gnuradio import eng_notation
> from gnuradio import gr
> from gnuradio import uhd
> from gnuradio import window
> from gnuradio.eng_option import eng_option
> from gnuradio.gr import firdes
> from gnuradio.wxgui import fftsink2
> from grc_gnuradio import wxgui as grc_wxgui
> from optparse import OptionParser
> import wx
>
> class dual_tvrx2_test(grc_wxgui.top_block_gui):
>
> def __init__(self):
> grc_wxgui.top_block_gui.__init__(self, title="Dual Tvrx2 Test")
> _icon_path =
> "/usr/share/icons/hicolor/32x32/apps/gnuradio-grc.png"
> self.SetIcon(wx.Icon(_icon_path, wx.BITMAP_TYPE_ANY))
>
> ##################################################
> # Variables
> ##################################################
> self.samp_rate = samp_rate = 320e3
>
> ##################################################
> # Blocks
> ##################################################
> self.wxgui_fftsink2_0_0 = fftsink2.fft_sink_c(
> self.GetWin(),
> baseband_freq=0,
> y_per_div=10,
> y_divs=10,
> ref_level=0,
> ref_scale=2.0,
> sample_rate=samp_rate,
> fft_size=1024,
> fft_rate=5,
> average=True,
> avg_alpha=0.1,
> title="FFT Plot",
> peak_hold=False,
> )
> self.Add(self.wxgui_fftsink2_0_0.win)
> self.wxgui_fftsink2_0 = fftsink2.fft_sink_c(
> self.GetWin(),
> baseband_freq=0,
> y_per_div=10,
> y_divs=10,
> ref_level=0,
> ref_scale=2.0,
> sample_rate=samp_rate,
> fft_size=1024,
> fft_rate=5,
> average=True,
> avg_alpha=0.1,
> title="FFT Plot",
> peak_hold=False,
> )
> self.Add(self.wxgui_fftsink2_0.win)
> self.uhd_usrp_source_0 = uhd.usrp_source(
> device_addr="type=b100",
> stream_args=uhd.stream_args(
> cpu_format="fc32",
> channels=range(2),
> ),
> )
> self.uhd_usrp_source_0.set_subdev_spec("A:RX1 A:RX2", 0)
> self.uhd_usrp_source_0.set_samp_rate(samp_rate)
> self.uhd_usrp_source_0.set_center_freq(106.1e6, 0)
> self.uhd_usrp_source_0.set_gain(25, 0)
> self.uhd_usrp_source_0.set_center_freq(101.1e6, 1)
> self.uhd_usrp_source_0.set_gain(25, 1)
>
> ##################################################
> # Connections
> ##################################################
> self.connect((self.uhd_usrp_source_0, 0),
> (self.wxgui_fftsink2_0, 0))
> self.connect((self.uhd_usrp_source_0, 1),
> (self.wxgui_fftsink2_0_0, 0))
>
> def get_samp_rate(self):
> return self.samp_rate
>
> def set_samp_rate(self, samp_rate):
> self.samp_rate = samp_rate
> self.uhd_usrp_source_0.set_samp_rate(self.samp_rate)
> self.wxgui_fftsink2_0.set_sample_rate(self.samp_rate)
> self.wxgui_fftsink2_0_0.set_sample_rate(self.samp_rate)
>
> if __name__ == '__main__':
> parser = OptionParser(option_class=eng_option, usage="%prog: [options]")
> (options, args) = parser.parse_args()
> tb = dual_tvrx2_test()
> tb.Run(True)
>
>
> _______________________________________________
> Discuss-gnuradio mailing list
> Discuss-gnuradio@gnu.org
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
>
--
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http://old.nabble.com/Problem-using-TVRX2-on-multiple-channels-tp33392627p33393143.html
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