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
<[email protected]>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
>
>
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