uhd/host/lib/usrp/usrp2/codec_ctrl.cpp

//
// 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 "codec_ctrl.hpp"
#include "ad9777_regs.hpp"
#include "usrp2_regs.hpp"
#include <boost/cstdint.hpp>
#include <boost/foreach.hpp>
#include <iostream>

static const bool codec_ctrl_debug = false;

using namespace uhd;

/*!
 * A usrp2 codec control specific to the ad9777 ic.
 */
class codec_ctrl_impl : public codec_ctrl{
public:
    codec_ctrl_impl(usrp2_iface::sptr iface){
        _iface = iface;

        //setup the ad9777 dac
        _ad9777_regs.x_1r_2r_mode = ad9777_regs_t::X_1R_2R_MODE_1R;
        _ad9777_regs.filter_interp_rate = ad9777_regs_t::FILTER_INTERP_RATE_4X;
        _ad9777_regs.mix_mode = ad9777_regs_t::MIX_MODE_REAL;
        _ad9777_regs.pll_divide_ratio = ad9777_regs_t::PLL_DIVIDE_RATIO_DIV1;
        _ad9777_regs.pll_state = ad9777_regs_t::PLL_STATE_OFF;
        _ad9777_regs.auto_cp_control = ad9777_regs_t::AUTO_CP_CONTROL_ENB;
        //I dac values
        _ad9777_regs.idac_fine_gain_adjust = 0;
        _ad9777_regs.idac_coarse_gain_adjust = 0xf;
        _ad9777_regs.idac_offset_adjust_lsb = 0;
        _ad9777_regs.idac_offset_adjust_msb = 0;
        //Q dac values
        _ad9777_regs.qdac_fine_gain_adjust = 0;
        _ad9777_regs.qdac_coarse_gain_adjust = 0xf;
        _ad9777_regs.qdac_offset_adjust_lsb = 0;
        _ad9777_regs.qdac_offset_adjust_msb = 0;
        //write all regs
        for(boost::uint8_t addr = 0; addr <= 0xC; addr++){
            this->send_ad9777_reg(addr);
        }

        //power-up adc
        _iface->poke32(FR_MISC_CTRL_ADC, FRF_MISC_CTRL_ADC_ON);
    }

    ~codec_ctrl_impl(void){
        //power-down dac
        _ad9777_regs.power_down_mode = 1;
        this->send_ad9777_reg(0);

        //power-down adc
        _iface->poke32(FR_MISC_CTRL_ADC, FRF_MISC_CTRL_ADC_OFF);
    }

private:
    ad9777_regs_t _ad9777_regs;
    usrp2_iface::sptr _iface;

    void send_ad9777_reg(boost::uint8_t addr){
        boost::uint16_t reg = _ad9777_regs.get_write_reg(addr);
        if (codec_ctrl_debug) std::cout << "send_ad9777_reg: " << std::hex << reg << std::endl;
        _iface->transact_spi(
            SPI_SS_AD9777, spi_config_t::EDGE_RISE,
            reg, 16, false /*no rb*/
        );
    }
};

/***********************************************************************
 * Public make function for the usrp2 codec control
 **********************************************************************/
codec_ctrl::sptr codec_ctrl::make(usrp2_iface::sptr iface){
    return sptr(new codec_ctrl_impl(iface));
}