Re: [Discuss-gnuradio] Re: to log raw data?

[Christoph Thein]

Hi,

you need to specify a filename.

A working command should be 

./usrp_rx_cfile.py -f 2.4G test.bin

Christoph


> Could u suggest a suitable command line?
> this one dusnt work ./usrp_rx_cfile.py  -f 2.4G -g 10 "-8 -N 1024
> I assume there are default values specified for the other parses arguements
>
>
> #!/usr/bin/env python
>
> """
> Read samples from the USRP and write to file formatted as binary
> outputs single precision complex float values or complex short values
> (interleaved 16 bit signed short integers).
>
> """
>
> from gnuradio import gr, eng_notation
> from gnuradio import audio
> from gnuradio import usrp
> from gnuradio.eng_option import eng_option
> from optparse import OptionParser
> import sys
>
> class my_top_block(gr.top_block):
>
>     def __init__(self):
>         gr.top_block.__init__(self)
>
>   *      usage="%prog: [options] output_filename"*
> *        parser = OptionParser(option_class=eng_option, usage=usage)*
> *        parser.add_option("-R", "--rx-subdev-spec", type="subdev",
> default=(0, 0),*
> *                          help="select USRP Rx side A or B (default=A)")*
> *        parser.add_option("-d", "--decim", type="int", default=16,*
> *                          help="set fgpa decimation rate to DECIM
> [default=%default]")*
> *        parser.add_option("-f", "--freq", type="eng_float", default=None,*
> *                          help="set frequency to FREQ", metavar="FREQ")*
> *        parser.add_option("-g", "--gain", type="eng_float", default=None,*
> *                          help="set gain in dB (default is midpoint)")*
> *        parser.add_option("-8", "--width-8", action="store_true",
> default=False,*
> *                          help="Enable 8-bit samples across USB")*
> *        parser.add_option( "--no-hb", action="store_true", default=False,*
> *                          help="don't use halfband filter in usrp")*
> *        parser.add_option( "-s","--output-shorts", action="store_true",
> default=False,*
> *                          help="output interleaved shorts in stead of
> complex floats")*
> *        parser.add_option("-N", "--nsamples", type="eng_float",
> default=None,*
> *                          help="number of samples to collect
> [default=+inf]")*
> *        (options, args) = parser.parse_args ()*
> *        if len(args) != 1:*
> *            parser.print_help()*
> *            raise SystemExit, 1*
> *        filename = args[0]*
>
>         if options.freq is None:
>             parser.print_help()
>             sys.stderr.write('You must specify the frequency with -f
> FREQ\n');
>             raise SystemExit, 1
>
>         # build the graph
>         if options.no_hb or (options.decim<8):
>           self.fpga_filename="std_4rx_0tx.rbf" #Min decimation of this
> firmware is 4. contains 4 Rx paths without halfbands and 0 tx paths.
>           if options.output_shorts:
>             self.u =
> usrp.source_s(decim_rate=options.decim,fpga_filename=self.fpga_filename)
>           else:
>             self.u =
> usrp.source_c(decim_rate=options.decim,fpga_filename=self.fpga_filename)
>         else:
>           #standard fpga firmware "std_2rxhb_2tx.rbf" contains 2 Rx paths
> with halfband filters and 2 tx paths (the default) min decimation 8
>           if options.output_shorts:
>             self.u = usrp.source_s(decim_rate=options.decim)
>           else:
>             self.u = usrp.source_c(decim_rate=options.decim)
>         if options.width_8:
>             sample_width = 8
>             sample_shift = 8
>             format = self.u.make_format(sample_width, sample_shift)
>             r = self.u.set_format(format)
>         if options.output_shorts:
>           self.dst = gr.file_sink(gr.sizeof_short, filename)
>         else:
>           self.dst = gr.file_sink(gr.sizeof_gr_complex, filename)
>         if options.nsamples is None:
>             self.connect(self.u, self.dst)
>         else:
>             if options.output_shorts:
>               self.head = gr.head(gr.sizeof_short, int(options.nsamples)*2)
>             else:
>               self.head = gr.head(gr.sizeof_gr_complex,
> int(options.nsamples))
>             self.connect(self.u, self.head, self.dst)
>
>         if options.rx_subdev_spec is None:
>             options.rx_subdev_spec = usrp.pick_rx_subdevice(self.u)
>         self.u.set_mux(usrp.determine_rx_mux_value(self.u,
> options.rx_subdev_spec))
>
>         # determine the daughterboard subdevice we're using
>         self.subdev = usrp.selected_subdev(self.u, options.rx_subdev_spec)
>         print "Using RX d'board %s" % (self.subdev.side_and_name(),)
>         input_rate = self.u.adc_freq() / self.u.decim_rate()
>         print "USB sample rate %s" % (eng_notation.num_to_str(input_rate))
>
>         if options.gain is None:
>             # if no gain was specified, use the mid-point in dB
>             g = self.subdev.gain_range()
>             options.gain = float(g[0]+g[1])/2
>
>         self.subdev.set_gain(options.gain)
>
>         r = self.u.tune(0, self.subdev, options.freq)
>         if not r:
>             sys.stderr.write('Failed to set frequency\n')
>             raise SystemExit, 1
>
>
> if __name__ == '__main__':
>     try:
>         my_top_block().run()
>     except KeyboardInterrupt:
>         pass
>
>
> On Sun, Oct 4, 2009 at 7:31 PM, Sudarshan Chandrashekar
>
> <address@hidden>wrote:
> > Hi shesha et all
> >
> > Following is the reply from a forum which i got in response to a query to
> > log raw data :
> >
> > "Hi Sudarshan,
> >
> > try the app usrp2_rx_cfile.py or usrp_rx_cfile.py depending on your usrp
> > version
> > to store the raw data.
> >
> > Regards,
> >
> > Christoph"
> >
> >
> >
> > ->execution of the same throws up errors
> >
> > ->any specific command line?
> >
> > Regards
> >
> > sudarshan
> >
> > 0-9-88-66-37-21-9