gr-usrptest: Initial creation

- new OOT-blocks: phase_calc_ccf hier-block, measurement_sink_f
 - new python submodules: flowgraphs, functions, rts_tests
 - new apps: usrp_phasealignment.py - cmdline example for manual testing

 OOT-Blocks:
  - phase_calc_ccf takes two complex input streams and conjugate
    multiplys them and extracts the phase from the result and converts
    it to degree scale
  - measurement_sink_f: takes a float input stream and calculates average and stddev for a
    specified number of samples. Start of a measurement is invoked by a
    call of start_run() on the block. After a couple of runs average and
    stddev can be extracted.

 Python modules:
  - flowgrahps contains reconfigurable flowgraphs for different GNU
    Radio RF test cases
  - functions contains functions which are used in different apps/RTS
    scripts
  - rts_tests contains test cases which are meant to be executed from
    the RTS system. Depends on TinyDB, labview_automation

 Apps:
  - usrp_phasealignment.py is an example how to use the underlying
    flowgraph to measure phase differences. Commandline arguments of
    uhd_app can be used and several additional arguments can/have to be
    specified. Runs a phase difference measurement --runs number of times and averages
    phase difference over --duration seconds. Between measurements USRP
    sinks are retuned to random frequencies in daughterboard range.
    Results are displayed using motherboard serial and daughterboard
    serial

1 files changed, 47 insertions, 0 deletions

diff --git a/tools/gr-usrptest/python/phase_calc_ccf.py b/tools/gr-usrptest/python/phase_calc_ccf.py
new file mode 100644
index 000000000..fe3cf55a8
--- /dev/null
+++ b/tools/gr-usrptest/python/phase_calc_ccf.py
@@ -0,0 +1,47 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+# Copyright 2016 Ettus Research LLC.
+#
+# This 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.
+#
+# This software 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 this software; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+#
+
+from gnuradio import gr
+from gnuradio import blocks
+import numpy as np
+
+
+class phase_calc_ccf(gr.hier_block2):
+    """
+    docstring for block phase_calc_ccf
+    """
+
+    def __init__(self):
+        gr.hier_block2.__init__(
+            self,
+            "phase_calc_ccf",
+            gr.io_signature(2, 2, gr.sizeof_gr_complex),  # Input signature
+            gr.io_signature(1, 1, gr.sizeof_float))  # Output signature
+        self.block = dict()
+        self.block['mult_conj'] = blocks.multiply_conjugate_cc()
+        self.block['arg'] = blocks.complex_to_arg()
+        self.block['mult_const'] = blocks.multiply_const_ff(180.0 / np.pi)
+
+        self.connect((self, 0), (self.block['mult_conj'], 0))
+        self.connect((self, 1), (self.block['mult_conj'], 1))
+        self.connect((self.block['mult_conj'], 0), (self.block['arg'], 0))
+        self.connect((self.block['arg'], 0), (self.block['mult_const'], 0))
+        self.connect((self.block['mult_const'], 0), (self, 0))