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//
// Copyright 2010-2012,2014 Ettus Research LLC
// Copyright 2018 Ettus Research, a National Instruments Company
//
// SPDX-License-Identifier: GPL-3.0-or-later
//
#include "codec_ctrl.hpp"
#include "ad9777_regs.hpp"
#include "ads62p44_regs.hpp"
#include "usrp2_regs.hpp"
#include <uhd/utils/log.hpp>
#include <uhd/utils/safe_call.hpp>
#include <uhd/exception.hpp>
#include <stdint.h>
using namespace uhd;
usrp2_codec_ctrl::~usrp2_codec_ctrl(void){
/* NOP */
}
/*!
* 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, uhd::spi_iface::sptr spiface){
_iface = iface;
_spiface = spiface;
//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(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(U2_REG_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_N200_R4:
case usrp2_iface::USRP_N210_R4:
_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.override = 1;
this->send_ads62p44_reg(0x14);
_ads62p44_regs.power_down = ads62p44_regs_t::POWER_DOWN_NORMAL;
_ads62p44_regs.output_interface = ads62p44_regs_t::OUTPUT_INTERFACE_LVDS;
_ads62p44_regs.lvds_current = ads62p44_regs_t::LVDS_CURRENT_2_5MA;
_ads62p44_regs.lvds_data_term = ads62p44_regs_t::LVDS_DATA_TERM_100;
this->send_ads62p44_reg(0x11);
this->send_ads62p44_reg(0x12);
this->send_ads62p44_reg(0x14);
this->set_rx_analog_gain(1);
break;
case usrp2_iface::USRP_NXXX: break;
}
}
~usrp2_codec_ctrl_impl(void){UHD_SAFE_CALL(
//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(U2_REG_MISC_CTRL_ADC, U2_FLAG_MISC_CTRL_ADC_OFF);
break;
case usrp2_iface::USRP_N200:
case usrp2_iface::USRP_N210:
case usrp2_iface::USRP_N200_R4:
case usrp2_iface::USRP_N210_R4:
//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 uhd::value_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:
case usrp2_iface::USRP_N200_R4:
case usrp2_iface::USRP_N210_R4:
_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:
case usrp2_iface::USRP_N200_R4:
case usrp2_iface::USRP_N210_R4:
_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:
case usrp2_iface::USRP_N200_R4:
case usrp2_iface::USRP_N210_R4:
_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();
}
}
size_t get_tx_interpolation() const
{
return 4;
}
private:
ad9777_regs_t _ad9777_regs;
ads62p44_regs_t _ads62p44_regs;
usrp2_iface::sptr _iface;
uhd::spi_iface::sptr _spiface;
void send_ad9777_reg(uint8_t addr){
uint16_t reg = _ad9777_regs.get_write_reg(addr);
UHD_LOG_TRACE("USRP2", "send_ad9777_reg: 0x" << std::hex << reg);
_spiface->write_spi(
SPI_SS_AD9777, spi_config_t::EDGE_RISE,
reg, 16
);
}
void send_ads62p44_reg(uint8_t addr) {
uint16_t reg = _ads62p44_regs.get_write_reg(addr);
_spiface->write_spi(
SPI_SS_ADS62P44, spi_config_t::EDGE_FALL,
reg, 16
);
}
};
/***********************************************************************
* Public make function for the usrp2 codec control
**********************************************************************/
usrp2_codec_ctrl::sptr usrp2_codec_ctrl::make(usrp2_iface::sptr iface, uhd::spi_iface::sptr spiface){
return sptr(new usrp2_codec_ctrl_impl(iface, spiface));
}
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