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-//
-// Copyright 2010 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 <usrp_uhd/wax.hpp>
-#include <boost/foreach.hpp>
-#include <boost/format.hpp>
-#include <boost/function.hpp>
-#include <stdexcept>
-#include <algorithm>
-#include <vector>
-#include <map>
-
-#ifndef INCLUDED_USRP_UHD_UTILS_HPP
-#define INCLUDED_USRP_UHD_UTILS_HPP
-
-namespace usrp_uhd{
-
-template <class Key, class T> //TODO template this better
-std::vector<Key> get_map_keys(const std::map<Key, T> &m){
- std::vector<Key> v;
- std::pair<Key, T> p;
- BOOST_FOREACH(p, m){
- v.push_back(p.first);
- }
- return v;
-}
-
-template<typename T> T signum(T n){
- if (n < 0) return -1;
- if (n > 0) return 1;
- return 0;
-}
-
-inline void tune(
- freq_t target_freq,
- freq_t lo_offset,
- wax::obj subdev_freq_proxy,
- bool subdev_quadrature,
- bool subdev_spectrum_inverted,
- bool subdev_is_tx,
- wax::obj dsp_freq_proxy,
- freq_t dsp_sample_rate
-){
- // Ask the d'board to tune as closely as it can to target_freq+lo_offset
- subdev_freq_proxy = target_freq + lo_offset;
- freq_t inter_freq = wax::cast<freq_t>(subdev_freq_proxy);
-
- // Calculate the DDC setting that will downconvert the baseband from the
- // daughterboard to our target frequency.
- freq_t delta_freq = target_freq - inter_freq;
- int delta_sign = signum(delta_freq);
- delta_freq *= delta_sign;
- delta_freq = fmod(delta_freq, dsp_sample_rate);
- bool inverted = delta_freq > dsp_sample_rate/2.0;
- freq_t dxc_freq = inverted? (delta_freq - dsp_sample_rate) : (-delta_freq);
- dxc_freq *= delta_sign;
-
- // If the spectrum is inverted, and the daughterboard doesn't do
- // quadrature downconversion, we can fix the inversion by flipping the
- // sign of the dxc_freq... (This only happens using the basic_rx board)
- if (subdev_spectrum_inverted){
- inverted = not inverted;
- }
- if (inverted and not subdev_quadrature){
- dxc_freq = -dxc_freq;
- inverted = not inverted;
- }
- if (subdev_is_tx){
- dxc_freq = -dxc_freq; // down conversion versus up conversion
- }
-
- dsp_freq_proxy = dxc_freq;
- //freq_t actual_dxc_freq = wax::cast<freq_t>(dsp_freq_proxy);
-
- //return some kind of tune result tuple/struct
-}
-
-} //namespace usrp_uhd
-
-/*!
- * Useful templated functions and classes that I like to pretend are part of stl
- */
-namespace std{
-
- class assert_error : public std::logic_error{
- public:
- explicit assert_error(const string& what_arg) : logic_error(what_arg){
- /* NOP */
- }
- };
-
- #define ASSERT_THROW(_x) if (not (_x)) { \
- throw std::assert_error("Assertion Failed: " + std::string(#_x)); \
- }
-
- template<class T, class InputIterator, class Function>
- T reduce(InputIterator first, InputIterator last, Function fcn, T init = 0){
- T tmp = init;
- for ( ; first != last; ++first ){
- tmp = fcn(tmp, *first);
- }
- return tmp;
- }
-
- template<class T, class InputIterator>
- bool has(InputIterator first, InputIterator last, const T &elem){
- return last != std::find(first, last, elem);
- }
-
- template<class T>
- T sum(const T &a, const T &b){
- return a + b;
- }
-
-}//namespace std
-
-#endif /* INCLUDED_USRP_UHD_UTILS_HPP */