usrp: Added fe_connection type and unit test

- Wraps a sampling mode and IF frequency
- Built-in parser to deduce swap,invert,mode bits from string connection

2 files changed, 109 insertions, 0 deletions

diff --git a/host/tests/CMakeLists.txt b/host/tests/CMakeLists.txt
index 14c8daa09..c5f25913e 100644
--- a/host/tests/CMakeLists.txt
+++ b/host/tests/CMakeLists.txt
@@ -46,6 +46,7 @@ SET(test_sources
     time_spec_test.cpp
     vrt_test.cpp
     expert_test.cpp
+    fe_conn_test.cpp
 )
 
 #turn each test cpp file into an executable with an int main() function
diff --git a/host/tests/fe_conn_test.cpp b/host/tests/fe_conn_test.cpp
new file mode 100644
index 000000000..b8e69816a
--- /dev/null
+++ b/host/tests/fe_conn_test.cpp
@@ -0,0 +1,108 @@
+//
+// Copyright 2016 Ettus Research LLC
+//
+// This program 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 of the License, or
+// (at your option) any later version.
+//
+// This program 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 program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include <uhd/usrp/fe_connection.hpp>
+#include <uhd/exception.hpp>
+#include <boost/test/unit_test.hpp>
+
+using namespace uhd::usrp;
+
+BOOST_AUTO_TEST_CASE(test_quardrature){
+    fe_connection_t IQ("IQ"), QI("QI"), IbQ("IbQ"), QbI("QbI"), QbIb("QbIb");
+    BOOST_CHECK(IQ.get_sampling_mode()==fe_connection_t::QUADRATURE);
+    BOOST_CHECK(QI.get_sampling_mode()==fe_connection_t::QUADRATURE);
+    BOOST_CHECK(IbQ.get_sampling_mode()==fe_connection_t::QUADRATURE);
+    BOOST_CHECK(QbI.get_sampling_mode()==fe_connection_t::QUADRATURE);
+    BOOST_CHECK(QbIb.get_sampling_mode()==fe_connection_t::QUADRATURE);
+
+    BOOST_CHECK(not IQ.is_iq_swapped());
+    BOOST_CHECK(QI.is_iq_swapped());
+    BOOST_CHECK(not IbQ.is_iq_swapped());
+    BOOST_CHECK(QbI.is_iq_swapped());
+    BOOST_CHECK(QbIb.is_iq_swapped());
+
+    BOOST_CHECK(not IQ.is_i_inverted());
+    BOOST_CHECK(not QI.is_i_inverted());
+    BOOST_CHECK(IbQ.is_i_inverted());
+    BOOST_CHECK(not QbI.is_i_inverted());
+    BOOST_CHECK(QbIb.is_i_inverted());
+
+    BOOST_CHECK(not IQ.is_q_inverted());
+    BOOST_CHECK(not QI.is_q_inverted());
+    BOOST_CHECK(not IbQ.is_q_inverted());
+    BOOST_CHECK(QbI.is_q_inverted());
+    BOOST_CHECK(QbIb.is_q_inverted());
+}
+
+BOOST_AUTO_TEST_CASE(test_heterodyne){
+    fe_connection_t II("II"), QQ("QQ"), IbIb("IbIb"), QbQb("QbQb");
+    BOOST_CHECK(II.get_sampling_mode()==fe_connection_t::HETERODYNE);
+    BOOST_CHECK(QQ.get_sampling_mode()==fe_connection_t::HETERODYNE);
+    BOOST_CHECK(IbIb.get_sampling_mode()==fe_connection_t::HETERODYNE);
+    BOOST_CHECK(QbQb.get_sampling_mode()==fe_connection_t::HETERODYNE);
+
+    BOOST_CHECK(not II.is_iq_swapped());
+    BOOST_CHECK(QQ.is_iq_swapped());
+    BOOST_CHECK(not IbIb.is_iq_swapped());
+    BOOST_CHECK(QbQb.is_iq_swapped());
+
+    BOOST_CHECK(not II.is_i_inverted());
+    BOOST_CHECK(not QQ.is_i_inverted());
+    BOOST_CHECK(IbIb.is_i_inverted());
+    BOOST_CHECK(QbQb.is_i_inverted());
+
+    BOOST_CHECK(not II.is_q_inverted());
+    BOOST_CHECK(not QQ.is_q_inverted());
+    BOOST_CHECK(IbIb.is_q_inverted());
+    BOOST_CHECK(QbQb.is_q_inverted());
+
+    BOOST_CHECK_THROW(fe_connection_t dummy("IIb"), uhd::value_error);
+    BOOST_CHECK_THROW(fe_connection_t dummy("IbI"), uhd::value_error);
+    BOOST_CHECK_THROW(fe_connection_t dummy("QQb"), uhd::value_error);
+    BOOST_CHECK_THROW(fe_connection_t dummy("QbQ"), uhd::value_error);
+}
+
+BOOST_AUTO_TEST_CASE(test_real){
+    fe_connection_t I("I"), Q("Q"), Ib("Ib"), Qb("Qb");
+    BOOST_CHECK(I.get_sampling_mode()==fe_connection_t::REAL);
+    BOOST_CHECK(Q.get_sampling_mode()==fe_connection_t::REAL);
+    BOOST_CHECK(Ib.get_sampling_mode()==fe_connection_t::REAL);
+    BOOST_CHECK(Qb.get_sampling_mode()==fe_connection_t::REAL);
+
+    BOOST_CHECK(not I.is_iq_swapped());
+    BOOST_CHECK(Q.is_iq_swapped());
+    BOOST_CHECK(not Ib.is_iq_swapped());
+    BOOST_CHECK(Qb.is_iq_swapped());
+
+    BOOST_CHECK(not I.is_i_inverted());
+    BOOST_CHECK(not Q.is_i_inverted());
+    BOOST_CHECK(Ib.is_i_inverted());
+    BOOST_CHECK(Qb.is_i_inverted());
+
+    BOOST_CHECK(not I.is_q_inverted());
+    BOOST_CHECK(not Q.is_q_inverted());
+    BOOST_CHECK(not Ib.is_q_inverted());
+    BOOST_CHECK(not Qb.is_q_inverted());
+}
+
+BOOST_AUTO_TEST_CASE(test_invalid){
+    BOOST_CHECK_THROW(fe_connection_t dummy("blah"), uhd::value_error);
+    BOOST_CHECK_THROW(fe_connection_t dummy("123456"), uhd::value_error);
+    BOOST_CHECK_THROW(fe_connection_t dummy("ii"), uhd::value_error);
+    BOOST_CHECK_THROW(fe_connection_t dummy("qb"), uhd::value_error);
+    BOOST_CHECK_THROW(fe_connection_t dummy("IIIQ"), uhd::value_error);
+}