#!/usr/bin/env python
#
# Copyright 2004,2007 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.
# 

"""
Check Rx path or USRP Rev 1.

This configures the USRP to return a periodic sequence of integers
"""

from gnuradio import gr
from gnuradio import usrp

def build_graph ():
    rx_decim  = 32
    
    tb = gr.top_block ()
    usrp_rx = usrp.source_s (0, rx_decim, 1, 0x32103210, usrp.FPGA_MODE_COUNTING)
    sink = gr.check_counting_s ()
    tb.connect (usrp_rx, sink)

    # file_sink = gr.file_sink (gr.sizeof_short, 'counting.dat')
    # tb.connect (usrp_rx, file_sink)

    return tb
    
def main ():
    tb = build_graph ()
    try:
        tb.run()
    except KeyboardInterrupt:
        pass

if __name__ == '__main__':
    main ()