diff options
Diffstat (limited to 'host/lib/usrp/usrp2/codec_ctrl.cpp')
| -rw-r--r-- | host/lib/usrp/usrp2/codec_ctrl.cpp | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/host/lib/usrp/usrp2/codec_ctrl.cpp b/host/lib/usrp/usrp2/codec_ctrl.cpp new file mode 100644 index 000000000..890969b5a --- /dev/null +++ b/host/lib/usrp/usrp2/codec_ctrl.cpp @@ -0,0 +1,191 @@ +// +// Copyright 2010-2011 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 "ads62p44_regs.hpp" +#include "usrp2_regs.hpp" +#include <boost/cstdint.hpp> +#include <boost/foreach.hpp> +#include <iostream> +#include <uhd/utils/exception.hpp> + +static const bool codec_ctrl_debug = false; + +using namespace uhd; + +/*! + * A usrp2 codec control specific to the ad9777 ic. + */ +class usrp2_codec_ctrl_impl : public usrp2_codec_ctrl{ +public: + usrp2_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_COMPLEX; + _ad9777_regs.pll_divide_ratio = ad9777_regs_t::PLL_DIVIDE_RATIO_DIV1; + _ad9777_regs.pll_state = ad9777_regs_t::PLL_STATE_ON; + _ad9777_regs.auto_cp_control = ad9777_regs_t::AUTO_CP_CONTROL_AUTO; + //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); + } + set_tx_mod_mode(0); + + //power-up adc + switch(_iface->get_rev()){ + case usrp2_iface::USRP2_REV3: + case usrp2_iface::USRP2_REV4: + _iface->poke32(_iface->regs.misc_ctrl_adc, U2_FLAG_MISC_CTRL_ADC_ON); + break; + + case usrp2_iface::USRP_N200: + case usrp2_iface::USRP_N210: + _ads62p44_regs.reset = 1; + this->send_ads62p44_reg(0x00); //issue a reset to the ADC + //everything else should be pretty much default, i think + //_ads62p44_regs.decimation = DECIMATION_DECIMATE_1; + _ads62p44_regs.power_down = ads62p44_regs_t::POWER_DOWN_NORMAL; + this->send_ads62p44_reg(0x14); + this->set_rx_analog_gain(1); + break; + + case usrp2_iface::USRP_NXXX: break; + } + } + + ~usrp2_codec_ctrl_impl(void){ + //power-down dac + _ad9777_regs.power_down_mode = 1; + this->send_ad9777_reg(0); + + //power-down adc + switch(_iface->get_rev()){ + case usrp2_iface::USRP2_REV3: + case usrp2_iface::USRP2_REV4: + _iface->poke32(_iface->regs.misc_ctrl_adc, U2_FLAG_MISC_CTRL_ADC_OFF); + break; + + case usrp2_iface::USRP_N200: + case usrp2_iface::USRP_N210: + //send a global power-down to the ADC here... it will get lifted on reset + _ads62p44_regs.power_down = ads62p44_regs_t::POWER_DOWN_GLOBAL_PD; + this->send_ads62p44_reg(0x14); + break; + + case usrp2_iface::USRP_NXXX: break; + } + } + + void set_tx_mod_mode(int mod_mode){ + //set the sign of the frequency shift + _ad9777_regs.modulation_form = (mod_mode > 0)? + ad9777_regs_t::MODULATION_FORM_E_PLUS_JWT: + ad9777_regs_t::MODULATION_FORM_E_MINUS_JWT + ; + + //set the frequency shift + switch(std::abs(mod_mode)){ + case 0: + case 1: _ad9777_regs.modulation_mode = ad9777_regs_t::MODULATION_MODE_NONE; break; + case 2: _ad9777_regs.modulation_mode = ad9777_regs_t::MODULATION_MODE_FS_2; break; + case 4: _ad9777_regs.modulation_mode = ad9777_regs_t::MODULATION_MODE_FS_4; break; + case 8: _ad9777_regs.modulation_mode = ad9777_regs_t::MODULATION_MODE_FS_8; break; + default: throw std::runtime_error("unknown modulation mode for ad9777"); + } + + this->send_ad9777_reg(0x01); //set the register + } + + void set_rx_digital_gain(double gain) { //fine digital gain + switch(_iface->get_rev()){ + case usrp2_iface::USRP_N200: + case usrp2_iface::USRP_N210: + _ads62p44_regs.fine_gain = int(gain/0.5); + this->send_ads62p44_reg(0x17); + break; + + default: UHD_THROW_INVALID_CODE_PATH(); + } + } + + void set_rx_digital_fine_gain(double gain) { //gain correction + switch(_iface->get_rev()){ + case usrp2_iface::USRP_N200: + case usrp2_iface::USRP_N210: + _ads62p44_regs.gain_correction = int(gain / 0.05); + this->send_ads62p44_reg(0x1A); + break; + + default: UHD_THROW_INVALID_CODE_PATH(); + } + } + + void set_rx_analog_gain(bool /*gain*/) { //turns on/off analog 3.5dB preamp + switch(_iface->get_rev()){ + case usrp2_iface::USRP_N200: + case usrp2_iface::USRP_N210: + _ads62p44_regs.coarse_gain = ads62p44_regs_t::COARSE_GAIN_3_5DB;//gain ? ads62p44_regs_t::COARSE_GAIN_3_5DB : ads62p44_regs_t::COARSE_GAIN_0DB; + this->send_ads62p44_reg(0x14); + break; + + default: UHD_THROW_INVALID_CODE_PATH(); + } + } + +private: + ad9777_regs_t _ad9777_regs; + ads62p44_regs_t _ads62p44_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*/ + ); + } + + void send_ads62p44_reg(boost::uint8_t addr) { + boost::uint16_t reg = _ads62p44_regs.get_write_reg(addr); + _iface->transact_spi( + SPI_SS_ADS62P44, spi_config_t::EDGE_FALL, + reg, 16, false /*no rb*/ + ); + } +}; + +/*********************************************************************** + * Public make function for the usrp2 codec control + **********************************************************************/ +usrp2_codec_ctrl::sptr usrp2_codec_ctrl::make(usrp2_iface::sptr iface){ + return sptr(new usrp2_codec_ctrl_impl(iface)); +} |