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# Copyright 2011 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# GNU Radio is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3, or (at your option)
# any later version.
#
# GNU Radio is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GNU Radio; see the file COPYING. If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street,
# Boston, MA 02110-1301, USA.
#
# Basic USRP setup and control.
# It's only ever been tried with a basic rx daughter card.
#
# Imagine that the gnuradio boilerplate is here.
#
# M. Revnell 2005-Dec
from gnuradio import gr
from gnuradio import uhd
class uhd_input(gr.hier_block2):
def __init__( self, address, samp_rate):
gr.hier_block2.__init__(self, "uhd_input",
gr.io_signature(0,0,0),
gr.io_signature(1,1,gr.sizeof_gr_complex))
self.src = uhd.usrp_source(device_addr=address,
io_type=uhd.io_type.COMPLEX_FLOAT32,
num_channels=1)
self.src.set_samp_rate(samp_rate)
self.usrp_rate = self.src.get_samp_rate()
self.connect(self.src, self)
def set_freq(self, target_freq):
"""
Set the center frequency.
@param target_freq: frequency in Hz
@type: bool
"""
r = self.src.set_center_freq(target_freq, 0)
if r:
self.freq = target_freq
return True
else:
return False
def get_freq(self):
return self.src.get_center_freq(0)
def set_gain(self, gain):
self.gain = gain
self.src.set_gain(gain, 0)
def add_options(parser):
parser.add_option("-a", "--address", type="string",
default="addr=192.168.10.2",
help="Address of UHD device, [default=%default]")
parser.add_option("-A", "--antenna", type="string", default=None,
help="select Rx Antenna where appropriate")
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)")
add_options = staticmethod(add_options)
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