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//
// Copyright 2016 Ettus Research LLC
// Copyright 2018 Ettus Research, a National Instruments Company
//
// SPDX-License-Identifier: GPL-3.0-or-later
//
#include <uhd/usrp/fe_connection.hpp>
#include <uhd/exception.hpp>
#include <regex>
#include <uhd/utils/math.hpp>
using namespace uhd::usrp;
fe_connection_t::fe_connection_t(
sampling_t sampling_mode, bool iq_swapped,
bool i_inverted, bool q_inverted, double if_freq
) : _sampling_mode(sampling_mode), _iq_swapped(iq_swapped),
_i_inverted(i_inverted), _q_inverted(q_inverted), _if_freq(if_freq)
{
}
fe_connection_t::fe_connection_t(const std::string& conn_str, double if_freq) {
static const std::regex conn_regex("([IQ])(b?)(([IQ])(b?))?");
std::cmatch matches;
if (std::regex_match(conn_str.c_str(), matches, conn_regex)) {
if (matches[3].length() == 0) {
//Connection in {I, Q, Ib, Qb}
_sampling_mode = REAL;
_iq_swapped = (matches[1].str() == "Q");
_i_inverted = (matches[2].length() != 0);
_q_inverted = false; //IQ is swapped after inversion
} else {
//Connection in {I(b?)Q(b?), Q(b?)I(b?), I(b?)I(b?), Q(b?)Q(b?)}
_sampling_mode = (matches[1].str() == matches[4].str()) ? HETERODYNE : QUADRATURE;
_iq_swapped = (matches[1].str() == "Q");
size_t i_idx = _iq_swapped ? 5 : 2, q_idx = _iq_swapped ? 2 : 5;
_i_inverted = (matches[i_idx].length() != 0);
_q_inverted = (matches[q_idx].length() != 0);
if (_sampling_mode == HETERODYNE and _i_inverted != _q_inverted) {
throw uhd::value_error("Invalid connection string: " + conn_str);
}
}
_if_freq = if_freq;
} else {
throw uhd::value_error("Invalid connection string: " + conn_str);
}
}
bool uhd::usrp::operator==(const fe_connection_t &lhs, const fe_connection_t &rhs){
return ((lhs.get_sampling_mode() == rhs.get_sampling_mode()) and
(lhs.is_iq_swapped() == rhs.is_iq_swapped()) and
(lhs.is_i_inverted() == rhs.is_i_inverted()) and
(lhs.is_q_inverted() == rhs.is_q_inverted()) and
uhd::math::frequencies_are_equal(lhs.get_if_freq(), rhs.get_if_freq()));
}
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