1 files changed, 119 insertions, 0 deletions
diff --git a/gr-utils/src/python/usrp2_rx_cfile.py b/gr-utils/src/python/usrp2_rx_cfile.py
new file mode 100755
index 000000000..9ab28607d
--- /dev/null
+++ b/gr-utils/src/python/usrp2_rx_cfile.py
@@ -0,0 +1,119 @@
+#!/usr/bin/env python
+
+"""
+Read samples from the USRP2 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 usrp2
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+import sys
+
+n2s = eng_notation.num_to_str
+
+class rx_cfile_block(gr.top_block):
+
+    def __init__(self, options, filename):
+        gr.top_block.__init__(self)
+
+        # Create a USRP2 source
+        if options.output_shorts:
+            self._u = usrp2.source_16sc(options.interface, options.mac_addr)
+            self._sink = gr.file_sink(gr.sizeof_short*2, filename)
+        else:
+            self._u = usrp2.source_32fc(options.interface, options.mac_addr)
+            self._sink = gr.file_sink(gr.sizeof_gr_complex, filename)
+
+        # Set receiver decimation rate
+        self._u.set_decim(options.decim)
+
+        # Set receive daughterboard gain
+        if options.gain is None:
+            #g = self._u.gain_range()
+            #options.gain = float(g[0]+g[1])/2
+            options.gain = 0 # Until gain range is implemented
+        self._u.set_gain(options.gain)
+
+        # Set receive frequency
+        tr = self._u.set_center_freq(options.freq)
+        if tr == None:
+            sys.stderr.write('Failed to set center frequency\n')
+            raise SystemExit, 1
+
+        # Create head block if needed wire it up
+        if options.nsamples is None:
+            self.connect(self._u, self._sink)
+        else:
+            if options.output_shorts:
+                self._head = gr.head(gr.sizeof_short*2, int(options.nsamples))
+            else:
+                self._head = gr.head(gr.sizeof_gr_complex, int(options.nsamples))
+
+            self.connect(self._u, self._head, self._sink)
+
+        #input_rate = self.u.adc_freq() / self.u.decim_rate()
+        input_rate = 100e6/options.decim
+        
+        if options.verbose:
+            print "Network interface:", options.interface
+            print "USRP2 address:", self._u.mac_addr()
+            #print "Using RX d'board %s" % (self._u.rx_name(),)
+            print "Rx gain:", options.gain
+            print "Rx baseband frequency:", n2s(tr.baseband_freq)
+            print "Rx DDC frequency:", n2s(tr.dxc_freq)
+            print "Rx residual frequency:", n2s(tr.residual_freq)
+            print "Rx decimation rate:", options.decim
+            print "Rx sample rate:", n2s(input_rate)
+            if options.nsamples is None:
+                print "Receiving samples until Ctrl-C"
+            else:
+                print "Receving", n2s(options.nsamples), "samples"
+            if options.output_shorts:
+                print "Writing 16-bit complex shorts"
+            else:
+                print "Writing 32-bit complex floats"
+            print "Output filename:", filename
+        
+def get_options():
+    usage="%prog: [options] output_filename"
+    parser = OptionParser(option_class=eng_option, usage=usage)
+    parser.add_option("-e", "--interface", type="string", default="eth0",
+                      help="use specified Ethernet interface [default=%default]")
+    parser.add_option("-m", "--mac-addr", type="string", default="",
+                      help="use USRP2 at specified MAC address [default=None]")  
+    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( "-s","--output-shorts", action="store_true", default=False,
+                      help="output interleaved shorts instead of complex floats")
+    parser.add_option("-N", "--nsamples", type="eng_float", default=None,
+                      help="number of samples to collect [default=+inf]")
+    parser.add_option("-v", "--verbose", action="store_true", default=False,
+                      help="verbose output")
+    (options, args) = parser.parse_args ()
+    if len(args) != 1:
+        parser.print_help()
+        raise SystemExit, 1
+    
+    if options.freq is None:
+        parser.print_help()
+        sys.stderr.write('You must specify the frequency with -f FREQ\n');
+        raise SystemExit, 1
+    
+    return (options, args[0])
+
+
+if __name__ == '__main__':
+    (options, filename) = get_options()
+    tb = rx_cfile_block(options, filename)
+    
+    try:
+        tb.run()
+    except KeyboardInterrupt:
+        pass