1 files changed, 293 insertions, 0 deletions
diff --git a/host/lib/simple_device.cpp b/host/lib/simple_device.cpp
new file mode 100644
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--- /dev/null
+++ b/host/lib/simple_device.cpp
@@ -0,0 +1,293 @@
+//
+// 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 <uhd/simple_device.hpp>
+#include <uhd/device.hpp>
+#include <uhd/utils.hpp>
+#include <uhd/props.hpp>
+#include <uhd/types.hpp>
+#include <boost/algorithm/string.hpp>
+#include <boost/foreach.hpp>
+#include <boost/format.hpp>
+#include <stdexcept>
+
+using namespace uhd;
+
+/***********************************************************************
+ * Tune Helper Function
+ **********************************************************************/
+static tune_result_t tune(
+    double target_freq,
+    double lo_offset,
+    wax::obj subdev,
+    wax::obj dxc,
+    bool is_tx
+){
+    wax::obj subdev_freq_proxy = subdev[SUBDEV_PROP_FREQ];
+    bool subdev_quadrature = subdev[SUBDEV_PROP_QUADRATURE].as<bool>();
+    bool subdev_spectrum_inverted = subdev[SUBDEV_PROP_SPECTRUM_INVERTED].as<bool>();
+    wax::obj dxc_freq_proxy = dxc[std::string("freq")];
+    double dxc_sample_rate = dxc[std::string("rate")].as<double>();
+
+    // Ask the d'board to tune as closely as it can to target_freq+lo_offset
+    double target_inter_freq = target_freq + lo_offset;
+    subdev_freq_proxy = target_inter_freq;
+    double actual_inter_freq = subdev_freq_proxy.as<double>();
+
+    // Calculate the DDC setting that will downconvert the baseband from the
+    // daughterboard to our target frequency.
+    double delta_freq = target_freq - actual_inter_freq;
+    double delta_sign = std::signum(delta_freq);
+    delta_freq *= delta_sign;
+    delta_freq = fmod(delta_freq, dxc_sample_rate);
+    bool inverted = delta_freq > dxc_sample_rate/2.0;
+    double target_dxc_freq = inverted? (delta_freq - dxc_sample_rate) : (-delta_freq);
+    target_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){
+        target_dxc_freq *= -1.0;
+        inverted = not inverted;
+    }
+    // down conversion versus up conversion, fight!
+    // your mother is ugly and your going down...
+    target_dxc_freq *= (is_tx)? -1.0 : +1.0;
+
+    dxc_freq_proxy = target_dxc_freq;
+    double actual_dxc_freq = dxc_freq_proxy.as<double>();
+
+    //return some kind of tune result tuple/struct
+    tune_result_t tune_result;
+    tune_result.target_inter_freq = target_inter_freq;
+    tune_result.actual_inter_freq = actual_inter_freq;
+    tune_result.target_dxc_freq = target_dxc_freq;
+    tune_result.actual_dxc_freq = actual_dxc_freq;
+    tune_result.spectrum_inverted = inverted;
+    return tune_result;
+}
+
+/***********************************************************************
+ * Helper Functions
+ **********************************************************************/
+static std::string trim(const std::string &in){
+    return boost::algorithm::trim_copy(in);
+}
+
+device_addr_t args_to_device_addr(const std::string &args){
+    device_addr_t addr;
+
+    //split the args at the semi-colons
+    std::vector<std::string> pairs;
+    boost::split(pairs, args, boost::is_any_of(";"));
+    BOOST_FOREACH(std::string pair, pairs){
+        if (trim(pair) == "") continue;
+
+        //split the key value pairs at the equals
+        std::vector<std::string> key_val;
+        boost::split(key_val, pair, boost::is_any_of("="));
+        if (key_val.size() != 2) throw std::runtime_error("invalid args string: "+args);
+        addr[trim(key_val[0])] = trim(key_val[1]);
+    }
+
+    return addr;
+}
+
+static std::vector<double> get_xx_rates(wax::obj decerps, wax::obj rate){
+    std::vector<double> rates;
+    BOOST_FOREACH(size_t decerp, decerps.as<std::vector<size_t> >()){
+        rates.push_back(rate.as<double>()/decerp);
+    }
+    return rates;
+}
+
+/***********************************************************************
+ * Simple Device Implementation
+ **********************************************************************/
+class simple_device_impl : public simple_device{
+public:
+    simple_device_impl(const device_addr_t &addr){
+        _dev = device::make(addr);
+        _mboard = (*_dev)[DEVICE_PROP_MBOARD];
+        _rx_ddc = _mboard[named_prop_t(MBOARD_PROP_RX_DSP, "ddc0")];
+        _tx_duc = _mboard[named_prop_t(MBOARD_PROP_TX_DSP, "duc0")];
+
+        //extract rx subdevice
+        wax::obj rx_dboard = _mboard[MBOARD_PROP_RX_DBOARD];
+        std::string rx_subdev_in_use = rx_dboard[DBOARD_PROP_USED_SUBDEVS].as<prop_names_t>().at(0);
+        _rx_subdev = rx_dboard[named_prop_t(DBOARD_PROP_SUBDEV, rx_subdev_in_use)];
+
+        //extract tx subdevice
+        wax::obj tx_dboard = _mboard[MBOARD_PROP_TX_DBOARD];
+        std::string tx_subdev_in_use = tx_dboard[DBOARD_PROP_USED_SUBDEVS].as<prop_names_t>().at(0);
+        _tx_subdev = tx_dboard[named_prop_t(DBOARD_PROP_SUBDEV, tx_subdev_in_use)];
+    }
+
+    ~simple_device_impl(void){
+        /* NOP */
+    }
+
+    device::sptr get_device(void){
+        return _dev;
+    }
+
+    std::string get_name(void){
+        return _mboard[MBOARD_PROP_NAME].as<std::string>();
+    }
+
+    /*******************************************************************
+     * Streaming
+     ******************************************************************/
+    void set_streaming(bool enb){
+        _rx_ddc[std::string("enabled")] = enb;
+    }
+
+    bool get_streaming(void){
+        return _rx_ddc[std::string("enabled")].as<bool>();
+    }
+
+    /*******************************************************************
+     * RX methods
+     ******************************************************************/
+    void set_rx_rate(double rate){
+        double samp_rate = _rx_ddc[std::string("rate")].as<double>();
+        assert_has(get_rx_rates(), rate, "simple device rx rate");
+        _rx_ddc[std::string("decim")] = size_t(samp_rate/rate);
+    }
+
+    double get_rx_rate(void){
+        double samp_rate = _rx_ddc[std::string("rate")].as<double>();
+        size_t decim = _rx_ddc[std::string("decim")].as<size_t>();
+        return samp_rate/decim;
+    }
+
+    std::vector<double> get_rx_rates(void){
+        return get_xx_rates(_rx_ddc[std::string("decims")], _rx_ddc[std::string("rate")]);
+    }
+
+    tune_result_t set_rx_freq(double target_freq){
+        double lo_offset = 0.0;
+        //if the local oscillator will be in the passband, use an offset
+        if (_rx_subdev[SUBDEV_PROP_LO_INTERFERES].as<bool>()){
+            lo_offset = get_rx_rate()*2.0;
+        }
+        return tune(target_freq, lo_offset, _rx_subdev, _rx_ddc, false/* not tx */);
+    }
+
+    freq_range_t get_rx_freq_range(void){
+        return _rx_subdev[SUBDEV_PROP_FREQ_RANGE].as<freq_range_t>();
+    }
+
+    void set_rx_gain(float gain){
+        _rx_subdev[SUBDEV_PROP_GAIN] = gain;
+    }
+
+    float get_rx_gain(void){
+        return _rx_subdev[SUBDEV_PROP_GAIN].as<gain_t>();
+    }
+
+    gain_range_t get_rx_gain_range(void){
+        return _rx_subdev[SUBDEV_PROP_GAIN_RANGE].as<gain_range_t>();
+    }
+
+    void set_rx_antenna(const std::string &ant){
+        _rx_subdev[SUBDEV_PROP_ANTENNA] = ant;
+    }
+
+    std::string get_rx_antenna(void){
+        return _rx_subdev[SUBDEV_PROP_ANTENNA].as<std::string>();
+    }
+
+    std::vector<std::string> get_rx_antennas(void){
+        return _rx_subdev[SUBDEV_PROP_ANTENNA_NAMES].as<std::vector<std::string> >();
+    }
+
+    /*******************************************************************
+     * TX methods
+     ******************************************************************/
+    void set_tx_rate(double rate){
+        double samp_rate = _tx_duc[std::string("rate")].as<double>();
+        assert_has(get_tx_rates(), rate, "simple device tx rate");
+        _tx_duc[std::string("interp")] = size_t(samp_rate/rate);
+    }
+
+    double get_tx_rate(void){
+        double samp_rate = _tx_duc[std::string("rate")].as<double>();
+        size_t interp = _tx_duc[std::string("interp")].as<size_t>();
+        return samp_rate/interp;
+    }
+
+    std::vector<double> get_tx_rates(void){
+        return get_xx_rates(_tx_duc[std::string("interps")], _tx_duc[std::string("rate")]);
+    }
+
+    tune_result_t set_tx_freq(double target_freq){
+        double lo_offset = 0.0;
+        //if the local oscillator will be in the passband, use an offset
+        if (_tx_subdev[SUBDEV_PROP_LO_INTERFERES].as<bool>()){
+            lo_offset = get_tx_rate()*2.0;
+        }
+        return tune(target_freq, lo_offset, _tx_subdev, _tx_duc, true/* is tx */);
+    }
+
+    freq_range_t get_tx_freq_range(void){
+        return _tx_subdev[SUBDEV_PROP_FREQ_RANGE].as<freq_range_t>();
+    }
+
+    void set_tx_gain(float gain){
+        _tx_subdev[SUBDEV_PROP_GAIN] = gain;
+    }
+
+    float get_tx_gain(void){
+        return _tx_subdev[SUBDEV_PROP_GAIN].as<gain_t>();
+    }
+
+    gain_range_t get_tx_gain_range(void){
+        return _tx_subdev[SUBDEV_PROP_GAIN_RANGE].as<gain_range_t>();
+    }
+
+    void set_tx_antenna(const std::string &ant){
+        _tx_subdev[SUBDEV_PROP_ANTENNA] = ant;
+    }
+
+    std::string get_tx_antenna(void){
+        return _tx_subdev[SUBDEV_PROP_ANTENNA].as<std::string>();
+    }
+
+    std::vector<std::string> get_tx_antennas(void){
+        return _tx_subdev[SUBDEV_PROP_ANTENNA_NAMES].as<std::vector<std::string> >();
+    }
+
+private:
+    device::sptr _dev;
+    wax::obj _mboard;
+    wax::obj _rx_ddc;
+    wax::obj _tx_duc;
+    wax::obj _rx_subdev;
+    wax::obj _tx_subdev;
+};
+
+/***********************************************************************
+ * The Make Function
+ **********************************************************************/
+simple_device::sptr simple_device::make(const std::string &args){
+    return sptr(new simple_device_impl(args_to_device_addr(args)));
+}