diff options
Diffstat (limited to 'host/lib/usrp/dboard')
| -rw-r--r-- | host/lib/usrp/dboard/CMakeLists.txt | 4 | ||||
| -rw-r--r-- | host/lib/usrp/dboard/db_sbx_common.cpp (renamed from host/lib/usrp/dboard/db_sbx.cpp) | 533 | ||||
| -rw-r--r-- | host/lib/usrp/dboard/db_sbx_common.hpp | 233 | ||||
| -rw-r--r-- | host/lib/usrp/dboard/db_sbx_version3.cpp | 186 | ||||
| -rw-r--r-- | host/lib/usrp/dboard/db_sbx_version4.cpp | 189 |
5 files changed, 742 insertions, 403 deletions
diff --git a/host/lib/usrp/dboard/CMakeLists.txt b/host/lib/usrp/dboard/CMakeLists.txt index cb71e695b..a865a7858 100644 --- a/host/lib/usrp/dboard/CMakeLists.txt +++ b/host/lib/usrp/dboard/CMakeLists.txt @@ -23,7 +23,9 @@ LIBUHD_APPEND_SOURCES( ${CMAKE_CURRENT_SOURCE_DIR}/db_basic_and_lf.cpp ${CMAKE_CURRENT_SOURCE_DIR}/db_rfx.cpp ${CMAKE_CURRENT_SOURCE_DIR}/db_xcvr2450.cpp - #${CMAKE_CURRENT_SOURCE_DIR}/db_sbx.cpp + #${CMAKE_CURRENT_SOURCE_DIR}/db_sbx_common.cpp + #${CMAKE_CURRENT_SOURCE_DIR}/db_sbx_version3.cpp + #${CMAKE_CURRENT_SOURCE_DIR}/db_sbx_version4.cpp #${CMAKE_CURRENT_SOURCE_DIR}/db_wbx_common.cpp #${CMAKE_CURRENT_SOURCE_DIR}/db_wbx_simple.cpp ${CMAKE_CURRENT_SOURCE_DIR}/db_dbsrx.cpp diff --git a/host/lib/usrp/dboard/db_sbx.cpp b/host/lib/usrp/dboard/db_sbx_common.cpp index 40dbd286d..51a0f0100 100644 --- a/host/lib/usrp/dboard/db_sbx.cpp +++ b/host/lib/usrp/dboard/db_sbx_common.cpp @@ -15,228 +15,13 @@ // along with this program. If not, see <http://www.gnu.org/licenses/>. // -// Common IO Pins -#define LO_LPF_EN (1 << 15) -#define ADF4350_CE (1 << 3) -#define ADF4350_PDBRF (1 << 2) -#define ADF4350_MUXOUT (1 << 1) // INPUT!!! -#define LOCKDET_MASK (1 << 0) // INPUT!!! - -// TX IO Pins -#define TRSW (1 << 14) // 0 = TX, 1 = RX -#define TX_LED_TXRX (1 << 7) // LED for TX Antenna Selection TX/RX -#define TX_LED_LD (1 << 6) // LED for TX Lock Detect -#define DIS_POWER_TX (1 << 5) // on UNIT_TX, 0 powers up TX -#define TX_ENABLE (1 << 4) // on UNIT_TX, 0 disables TX Mixer - -// RX IO Pins -#define LNASW (1 << 14) // 0 = TX/RX, 1 = RX2 -#define RX_LED_RX1RX2 (1 << 7) // LED for RX Antenna Selection RX1/RX2 -#define RX_LED_LD (1 << 6) // LED for RX Lock Detect -#define DIS_POWER_RX (1 << 5) // on UNIT_RX, 0 powers up RX -#define RX_DISABLE (1 << 4) // on UNIT_RX, 1 disables RX Mixer and Baseband - -// RX Attenuator Pins -#define RX_ATTN_SHIFT 8 // lsb of RX Attenuator Control -#define RX_ATTN_MASK (63 << RX_ATTN_SHIFT) // valid bits of RX Attenuator Control - -// TX Attenuator Pins -#define TX_ATTN_SHIFT 8 // lsb of RX Attenuator Control -#define TX_ATTN_MASK (63 << TX_ATTN_SHIFT) // valid bits of RX Attenuator Control - -// Mixer functions -#define TX_MIXER_ENB (ADF4350_PDBRF) -#define TX_MIXER_DIS 0 - -#define RX_MIXER_ENB (ADF4350_PDBRF) -#define RX_MIXER_DIS 0 - -// Pin functions -#define TX_LED_IO (TX_LED_TXRX|TX_LED_LD) // LED gpio lines, pull down for LED -#define TXIO_MASK (LO_LPF_EN|TRSW|ADF4350_CE|ADF4350_PDBRF|TX_ATTN_MASK|DIS_POWER_TX|TX_ENABLE) - -#define RX_LED_IO (RX_LED_RX1RX2|RX_LED_LD) // LED gpio lines, pull down for LED -#define RXIO_MASK (LO_LPF_EN|LNASW|ADF4350_CE|ADF4350_PDBRF|RX_ATTN_MASK|DIS_POWER_RX|RX_DISABLE) - -// Power functions -#define TX_POWER_UP (ADF4350_CE|TX_ENABLE) -#define TX_POWER_DOWN (DIS_POWER_TX) - -#define RX_POWER_UP (ADF4350_CE) -#define RX_POWER_DOWN (DIS_POWER_RX) - -// Antenna constants -#define ANT_TX TRSW //the tx line is transmitting -#define ANT_RX 0 //the tx line is receiving -#define ANT_TXRX 0 //the rx line is on txrx -#define ANT_RX2 LNASW //the rx line in on rx2 -#define ANT_XX LNASW //dont care how the antenna is set - +#include "db_sbx_common.hpp" #include "adf4350_regs.hpp" -#include <uhd/types/dict.hpp> -#include <uhd/types/ranges.hpp> -#include <uhd/types/sensors.hpp> -#include <uhd/utils/assert_has.hpp> -#include <uhd/utils/log.hpp> -#include <uhd/utils/static.hpp> -#include <uhd/utils/algorithm.hpp> -#include <uhd/utils/msg.hpp> -#include <uhd/usrp/dboard_base.hpp> -#include <uhd/usrp/dboard_manager.hpp> -#include <boost/assign/list_of.hpp> -#include <boost/format.hpp> -#include <boost/math/special_functions/round.hpp> -#include <boost/thread.hpp> using namespace uhd; using namespace uhd::usrp; using namespace boost::assign; -/*********************************************************************** - * The SBX dboard constants - **********************************************************************/ -static const freq_range_t sbx_freq_range(400e6, 4.4e9); - -static const freq_range_t sbx_tx_lo_2dbm = list_of - (range_t(0.35e9, 0.37e9)) -; - -static const freq_range_t sbx_enable_tx_lo_filter = list_of - (range_t(0.4e9, 1.5e9)) -; - -static const freq_range_t sbx_enable_rx_lo_filter = list_of - (range_t(0.4e9, 1.5e9)) -; - -static const prop_names_t sbx_tx_antennas = list_of("TX/RX"); - -static const prop_names_t sbx_rx_antennas = list_of("TX/RX")("RX2"); - -static const uhd::dict<std::string, gain_range_t> sbx_tx_gain_ranges = map_list_of - ("PGA0", gain_range_t(0, 31.5, double(0.5))) -; - -static const uhd::dict<std::string, gain_range_t> sbx_rx_gain_ranges = map_list_of - ("PGA0", gain_range_t(0, 31.5, double(0.5))) -; - -/*********************************************************************** - * The SBX dboard - **********************************************************************/ -class sbx_xcvr : public xcvr_dboard_base{ -public: - sbx_xcvr(ctor_args_t args); - ~sbx_xcvr(void); - - void rx_get(const wax::obj &key, wax::obj &val); - void rx_set(const wax::obj &key, const wax::obj &val); - - void tx_get(const wax::obj &key, wax::obj &val); - void tx_set(const wax::obj &key, const wax::obj &val); - -private: - uhd::dict<std::string, double> _tx_gains, _rx_gains; - double _rx_lo_freq, _tx_lo_freq; - std::string _tx_ant, _rx_ant; - - void set_rx_lo_freq(double freq); - void set_tx_lo_freq(double freq); - void set_rx_ant(const std::string &ant); - void set_tx_ant(const std::string &ant); - void set_rx_gain(double gain, const std::string &name); - void set_tx_gain(double gain, const std::string &name); - - void update_atr(void); - - /*! - * Set the LO frequency for the particular dboard unit. - * \param unit which unit rx or tx - * \param target_freq the desired frequency in Hz - * \return the actual frequency in Hz - */ - double set_lo_freq(dboard_iface::unit_t unit, double target_freq); - - /*! - * Get the lock detect status of the LO. - * \param unit which unit rx or tx - * \return true for locked - */ - bool get_locked(dboard_iface::unit_t unit){ - return (this->get_iface()->read_gpio(unit) & LOCKDET_MASK) != 0; - } - - /*! - * Flash the LEDs - */ - void flash_leds(void) { - //Remove LED gpios from ATR control temporarily and set to outputs - this->get_iface()->set_pin_ctrl(dboard_iface::UNIT_TX, TXIO_MASK); - this->get_iface()->set_pin_ctrl(dboard_iface::UNIT_RX, RXIO_MASK); - this->get_iface()->set_gpio_ddr(dboard_iface::UNIT_TX, (TXIO_MASK|RX_LED_IO)); - this->get_iface()->set_gpio_ddr(dboard_iface::UNIT_RX, (RXIO_MASK|RX_LED_IO)); - - /* - //flash All LEDs - for (int i = 0; i < 3; i++) { - this->get_iface()->set_gpio_out(dboard_iface::UNIT_RX, RX_LED_IO, RX_LED_IO); - this->get_iface()->set_gpio_out(dboard_iface::UNIT_TX, TX_LED_IO, TX_LED_IO); - - boost::this_thread::sleep(boost::posix_time::milliseconds(100)); - - this->get_iface()->set_gpio_out(dboard_iface::UNIT_RX, 0, RX_LED_IO); - this->get_iface()->set_gpio_out(dboard_iface::UNIT_TX, 0, TX_LED_IO); - - boost::this_thread::sleep(boost::posix_time::milliseconds(100)); - } - */ - - this->get_iface()->set_gpio_out(dboard_iface::UNIT_TX, TX_LED_LD, TX_LED_IO); - boost::this_thread::sleep(boost::posix_time::milliseconds(100)); - - this->get_iface()->set_gpio_out(dboard_iface::UNIT_TX, TX_LED_TXRX|TX_LED_LD, TX_LED_IO); - boost::this_thread::sleep(boost::posix_time::milliseconds(100)); - - this->get_iface()->set_gpio_out(dboard_iface::UNIT_RX, RX_LED_LD, RX_LED_IO); - boost::this_thread::sleep(boost::posix_time::milliseconds(100)); - - this->get_iface()->set_gpio_out(dboard_iface::UNIT_RX, RX_LED_RX1RX2|RX_LED_LD, RX_LED_IO); - boost::this_thread::sleep(boost::posix_time::milliseconds(100)); - - this->get_iface()->set_gpio_out(dboard_iface::UNIT_RX, RX_LED_LD, RX_LED_IO); - boost::this_thread::sleep(boost::posix_time::milliseconds(100)); - - this->get_iface()->set_gpio_out(dboard_iface::UNIT_RX, 0, RX_LED_IO); - boost::this_thread::sleep(boost::posix_time::milliseconds(100)); - - this->get_iface()->set_gpio_out(dboard_iface::UNIT_TX, TX_LED_LD, TX_LED_IO); - boost::this_thread::sleep(boost::posix_time::milliseconds(100)); - - this->get_iface()->set_gpio_out(dboard_iface::UNIT_TX, 0, TX_LED_IO); - boost::this_thread::sleep(boost::posix_time::milliseconds(100)); - - /* - //flash All LEDs - for (int i = 0; i < 3; i++) { - this->get_iface()->set_gpio_out(dboard_iface::UNIT_RX, 0, RX_LED_IO); - this->get_iface()->set_gpio_out(dboard_iface::UNIT_TX, 0, TX_LED_IO); - - boost::this_thread::sleep(boost::posix_time::milliseconds(100)); - - this->get_iface()->set_gpio_out(dboard_iface::UNIT_RX, RX_LED_IO, RX_LED_IO); - this->get_iface()->set_gpio_out(dboard_iface::UNIT_TX, TX_LED_IO, TX_LED_IO); - - boost::this_thread::sleep(boost::posix_time::milliseconds(100)); - } - */ - //Put LED gpios back in ATR control and update atr - this->get_iface()->set_pin_ctrl(dboard_iface::UNIT_TX, (TXIO_MASK|TX_LED_IO)); - this->get_iface()->set_pin_ctrl(dboard_iface::UNIT_RX, (RXIO_MASK|RX_LED_IO)); - this->get_iface()->set_gpio_ddr(dboard_iface::UNIT_TX, (TXIO_MASK|TX_LED_IO)); - this->get_iface()->set_gpio_ddr(dboard_iface::UNIT_RX, (RXIO_MASK|RX_LED_IO)); - } - -}; /*********************************************************************** * Register the SBX dboard (min freq, max freq, rx div2, tx div2) @@ -247,46 +32,9 @@ static dboard_base::sptr make_sbx(dboard_base::ctor_args_t args){ UHD_STATIC_BLOCK(reg_sbx_dboards){ dboard_manager::register_dboard(0x0054, 0x0055, &make_sbx, "SBX"); + dboard_manager::register_dboard(0x0065, 0x0064, &make_sbx, "SBX v4"); } -/*********************************************************************** - * Structors - **********************************************************************/ -sbx_xcvr::sbx_xcvr(ctor_args_t args) : xcvr_dboard_base(args){ - - //enable the clocks that we need - this->get_iface()->set_clock_enabled(dboard_iface::UNIT_TX, true); - this->get_iface()->set_clock_enabled(dboard_iface::UNIT_RX, true); - - //set the gpio directions and atr controls (identically) - this->get_iface()->set_pin_ctrl(dboard_iface::UNIT_TX, (TXIO_MASK|TX_LED_IO)); - this->get_iface()->set_pin_ctrl(dboard_iface::UNIT_RX, (RXIO_MASK|RX_LED_IO)); - this->get_iface()->set_gpio_ddr(dboard_iface::UNIT_TX, (TXIO_MASK|TX_LED_IO)); - this->get_iface()->set_gpio_ddr(dboard_iface::UNIT_RX, (RXIO_MASK|RX_LED_IO)); - - //flash LEDs - flash_leds(); - - UHD_LOGV(often) << boost::format( - "SBX GPIO Direction: RX: 0x%08x, TX: 0x%08x" - ) % RXIO_MASK % TXIO_MASK << std::endl; - - //set some default values - set_rx_lo_freq((sbx_freq_range.start() + sbx_freq_range.stop())/2.0); - set_tx_lo_freq((sbx_freq_range.start() + sbx_freq_range.stop())/2.0); - set_rx_ant("RX2"); - - BOOST_FOREACH(const std::string &name, sbx_tx_gain_ranges.keys()){ - set_tx_gain(sbx_tx_gain_ranges[name].start(), name); - } - BOOST_FOREACH(const std::string &name, sbx_rx_gain_ranges.keys()){ - set_rx_gain(sbx_rx_gain_ranges[name].start(), name); - } -} - -sbx_xcvr::~sbx_xcvr(void){ - /* NOP */ -} /*********************************************************************** * Gain Handling @@ -302,7 +50,6 @@ static int rx_pga0_gain_to_iobits(double &gain){ int attn_code = int(floor(attn*2)); int iobits = ((~attn_code) << RX_ATTN_SHIFT) & RX_ATTN_MASK; - UHD_LOGV(often) << boost::format( "SBX TX Attenuation: %f dB, Code: %d, IO Bits %x, Mask: %x" ) % attn % attn_code % (iobits & RX_ATTN_MASK) % RX_ATTN_MASK << std::endl; @@ -324,7 +71,6 @@ static int tx_pga0_gain_to_iobits(double &gain){ int attn_code = int(floor(attn*2)); int iobits = ((~attn_code) << TX_ATTN_SHIFT) & TX_ATTN_MASK; - UHD_LOGV(often) << boost::format( "SBX TX Attenuation: %f dB, Code: %d, IO Bits %x, Mask: %x" ) % attn % attn_code % (iobits & TX_ATTN_MASK) % TX_ATTN_MASK << std::endl; @@ -359,6 +105,57 @@ void sbx_xcvr::set_rx_gain(double gain, const std::string &name){ else UHD_THROW_INVALID_CODE_PATH(); } + +/*********************************************************************** + * Structors + **********************************************************************/ +sbx_xcvr::sbx_xcvr(ctor_args_t args) : xcvr_dboard_base(args){ + switch(get_rx_id().to_uint16()) { + case 0x054: + db_actual = sbx_versionx_sptr(new sbx_version3(this)); + break; + case 0x065: + db_actual = sbx_versionx_sptr(new sbx_version4(this)); + break; + default: + /* We didn't recognize the version of the board... */ + UHD_THROW_INVALID_CODE_PATH(); + } + + //enable the clocks that we need + this->get_iface()->set_clock_enabled(dboard_iface::UNIT_TX, true); + this->get_iface()->set_clock_enabled(dboard_iface::UNIT_RX, true); + + //set the gpio directions and atr controls (identically) + this->get_iface()->set_pin_ctrl(dboard_iface::UNIT_TX, (TXIO_MASK|TX_LED_IO)); + this->get_iface()->set_pin_ctrl(dboard_iface::UNIT_RX, (RXIO_MASK|RX_LED_IO)); + this->get_iface()->set_gpio_ddr(dboard_iface::UNIT_TX, (TXIO_MASK|TX_LED_IO)); + this->get_iface()->set_gpio_ddr(dboard_iface::UNIT_RX, (RXIO_MASK|RX_LED_IO)); + + //flash LEDs + flash_leds(); + + UHD_LOGV(often) << boost::format( + "SBX GPIO Direction: RX: 0x%08x, TX: 0x%08x" + ) % RXIO_MASK % TXIO_MASK << std::endl; + + //set some default values + set_rx_lo_freq((sbx_freq_range.start() + sbx_freq_range.stop())/2.0); + set_tx_lo_freq((sbx_freq_range.start() + sbx_freq_range.stop())/2.0); + set_rx_ant("RX2"); + + BOOST_FOREACH(const std::string &name, sbx_tx_gain_ranges.keys()){ + set_tx_gain(sbx_tx_gain_ranges[name].start(), name); + } + BOOST_FOREACH(const std::string &name, sbx_rx_gain_ranges.keys()){ + set_rx_gain(sbx_rx_gain_ranges[name].start(), name); + } +} + +sbx_xcvr::~sbx_xcvr(void){ + /* NOP */ +} + /*********************************************************************** * Antenna Handling **********************************************************************/ @@ -422,158 +219,16 @@ void sbx_xcvr::set_tx_ant(const std::string &ant){ * Tuning **********************************************************************/ void sbx_xcvr::set_rx_lo_freq(double freq){ - _rx_lo_freq = set_lo_freq(dboard_iface::UNIT_RX, freq); + _rx_lo_freq = db_actual->set_lo_freq(dboard_iface::UNIT_RX, freq); } void sbx_xcvr::set_tx_lo_freq(double freq){ - _tx_lo_freq = set_lo_freq(dboard_iface::UNIT_TX, freq); + _tx_lo_freq = db_actual->set_lo_freq(dboard_iface::UNIT_TX, freq); } -double sbx_xcvr::set_lo_freq( - dboard_iface::unit_t unit, - double target_freq -){ - UHD_LOGV(often) << boost::format( - "SBX tune: target frequency %f Mhz" - ) % (target_freq/1e6) << std::endl; - - //clip the input - target_freq = sbx_freq_range.clip(target_freq); - - //map prescaler setting to mininmum integer divider (N) values (pg.18 prescaler) - static const uhd::dict<int, int> prescaler_to_min_int_div = map_list_of - (0,23) //adf4350_regs_t::PRESCALER_4_5 - (1,75) //adf4350_regs_t::PRESCALER_8_9 - ; - - //map rf divider select output dividers to enums - static const uhd::dict<int, adf4350_regs_t::rf_divider_select_t> rfdivsel_to_enum = map_list_of - (1, adf4350_regs_t::RF_DIVIDER_SELECT_DIV1) - (2, adf4350_regs_t::RF_DIVIDER_SELECT_DIV2) - (4, adf4350_regs_t::RF_DIVIDER_SELECT_DIV4) - (8, adf4350_regs_t::RF_DIVIDER_SELECT_DIV8) - (16, adf4350_regs_t::RF_DIVIDER_SELECT_DIV16) - ; - - double actual_freq, pfd_freq; - double ref_freq = this->get_iface()->get_clock_rate(unit); - int R=0, BS=0, N=0, FRAC=0, MOD=0; - int RFdiv = 1; - adf4350_regs_t::reference_divide_by_2_t T = adf4350_regs_t::REFERENCE_DIVIDE_BY_2_DISABLED; - adf4350_regs_t::reference_doubler_t D = adf4350_regs_t::REFERENCE_DOUBLER_DISABLED; - - //Reference doubler for 50% duty cycle - // if ref_freq < 12.5MHz enable regs.reference_divide_by_2 - if(ref_freq <= 12.5e6) D = adf4350_regs_t::REFERENCE_DOUBLER_ENABLED; - - //increase RF divider until acceptable VCO frequency - //start with target_freq*2 because mixer has divide by 2 - double vco_freq = target_freq; - while (vco_freq < 2.2e9) { - vco_freq *= 2; - RFdiv *= 2; - } - - //use 8/9 prescaler for vco_freq > 3 GHz (pg.18 prescaler) - adf4350_regs_t::prescaler_t prescaler = vco_freq > 3e9 ? adf4350_regs_t::PRESCALER_8_9 : adf4350_regs_t::PRESCALER_4_5; - /* - * The goal here is to loop though possible R dividers, - * band select clock dividers, N (int) dividers, and FRAC - * (frac) dividers. - * - * Calculate the N and F dividers for each set of values. - * The loop exists when it meets all of the constraints. - * The resulting loop values are loaded into the registers. - * - * from pg.21 - * - * f_pfd = f_ref*(1+D)/(R*(1+T)) - * f_vco = (N + (FRAC/MOD))*f_pfd - * N = f_vco/f_pfd - FRAC/MOD = f_vco*((R*(T+1))/(f_ref*(1+D))) - FRAC/MOD - * f_rf = f_vco/RFdiv) - * f_actual = f_rf/2 - */ - for(R = 1; R <= 1023; R+=1){ - //PFD input frequency = f_ref/R ... ignoring Reference doubler/divide-by-2 (D & T) - pfd_freq = ref_freq*(1+D)/(R*(1+T)); - - //keep the PFD frequency at or below 25MHz (Loop Filter Bandwidth) - if (pfd_freq > 25e6) continue; - - //ignore fractional part of tuning - N = int(std::floor(vco_freq/pfd_freq)); - - //keep N > minimum int divider requirement - if (N < prescaler_to_min_int_div[prescaler]) continue; - - for(BS=1; BS <= 255; BS+=1){ - //keep the band select frequency at or below 100KHz - //constraint on band select clock - if (pfd_freq/BS > 100e3) continue; - goto done_loop; - } - } done_loop: - - //Fractional-N calculation - MOD = 4095; //max fractional accuracy - FRAC = int((vco_freq/pfd_freq - N)*MOD); - - //Reference divide-by-2 for 50% duty cycle - // if R even, move one divide by 2 to to regs.reference_divide_by_2 - if(R % 2 == 0){ - T = adf4350_regs_t::REFERENCE_DIVIDE_BY_2_ENABLED; - R /= 2; - } - - //actual frequency calculation - actual_freq = double((N + (double(FRAC)/double(MOD)))*ref_freq*(1+int(D))/(R*(1+int(T)))/RFdiv); - - UHD_LOGV(often) - << boost::format("SBX Intermediates: ref=%0.2f, outdiv=%f, fbdiv=%f") % (ref_freq*(1+int(D))/(R*(1+int(T)))) % double(RFdiv*2) % double(N + double(FRAC)/double(MOD)) << std::endl - << boost::format("SBX tune: R=%d, BS=%d, N=%d, FRAC=%d, MOD=%d, T=%d, D=%d, RFdiv=%d, LD=%d" - ) % R % BS % N % FRAC % MOD % T % D % RFdiv % get_locked(unit)<< std::endl - << boost::format("SBX Frequencies (MHz): REQ=%0.2f, ACT=%0.2f, VCO=%0.2f, PFD=%0.2f, BAND=%0.2f" - ) % (target_freq/1e6) % (actual_freq/1e6) % (vco_freq/1e6) % (pfd_freq/1e6) % (pfd_freq/BS/1e6) << std::endl; - - //load the register values - adf4350_regs_t regs; - - if ((unit == dboard_iface::UNIT_TX) and (actual_freq == sbx_tx_lo_2dbm.clip(actual_freq))) - regs.output_power = adf4350_regs_t::OUTPUT_POWER_2DBM; - else - regs.output_power = adf4350_regs_t::OUTPUT_POWER_5DBM; - - regs.frac_12_bit = FRAC; - regs.int_16_bit = N; - regs.mod_12_bit = MOD; - regs.prescaler = prescaler; - regs.r_counter_10_bit = R; - regs.reference_divide_by_2 = T; - regs.reference_doubler = D; - regs.band_select_clock_div = BS; - UHD_ASSERT_THROW(rfdivsel_to_enum.has_key(RFdiv)); - regs.rf_divider_select = rfdivsel_to_enum[RFdiv]; - - //write the registers - //correct power-up sequence to write registers (5, 4, 3, 2, 1, 0) - int addr; - - for(addr=5; addr>=0; addr--){ - UHD_LOGV(often) << boost::format( - "SBX SPI Reg (0x%02x): 0x%08x" - ) % addr % regs.get_reg(addr) << std::endl; - this->get_iface()->write_spi( - unit, spi_config_t::EDGE_RISE, - regs.get_reg(addr), 32 - ); - } - - //return the actual frequency - UHD_LOGV(often) << boost::format( - "SBX tune: actual frequency %f Mhz" - ) % (actual_freq/1e6) << std::endl; - return actual_freq; +double sbx_xcvr::set_lo_freq(dboard_iface::unit_t unit, double target_freq) { + return db_actual->set_lo_freq(unit, target_freq); } /*********************************************************************** @@ -783,3 +438,77 @@ void sbx_xcvr::tx_set(const wax::obj &key_, const wax::obj &val){ default: UHD_THROW_PROP_SET_ERROR(); } } + + +bool sbx_xcvr::get_locked(dboard_iface::unit_t unit) { + return (this->get_iface()->read_gpio(unit) & LOCKDET_MASK) != 0; +} + + +void sbx_xcvr::flash_leds(void) { + //Remove LED gpios from ATR control temporarily and set to outputs + this->get_iface()->set_pin_ctrl(dboard_iface::UNIT_TX, TXIO_MASK); + this->get_iface()->set_pin_ctrl(dboard_iface::UNIT_RX, RXIO_MASK); + this->get_iface()->set_gpio_ddr(dboard_iface::UNIT_TX, (TXIO_MASK|RX_LED_IO)); + this->get_iface()->set_gpio_ddr(dboard_iface::UNIT_RX, (RXIO_MASK|RX_LED_IO)); + + /* + //flash All LEDs + for (int i = 0; i < 3; i++) { + this->get_iface()->set_gpio_out(dboard_iface::UNIT_RX, RX_LED_IO, RX_LED_IO); + this->get_iface()->set_gpio_out(dboard_iface::UNIT_TX, TX_LED_IO, TX_LED_IO); + + boost::this_thread::sleep(boost::posix_time::milliseconds(100)); + + this->get_iface()->set_gpio_out(dboard_iface::UNIT_RX, 0, RX_LED_IO); + this->get_iface()->set_gpio_out(dboard_iface::UNIT_TX, 0, TX_LED_IO); + + boost::this_thread::sleep(boost::posix_time::milliseconds(100)); + } + */ + + this->get_iface()->set_gpio_out(dboard_iface::UNIT_TX, TX_LED_LD, TX_LED_IO); + boost::this_thread::sleep(boost::posix_time::milliseconds(100)); + + this->get_iface()->set_gpio_out(dboard_iface::UNIT_TX, TX_LED_TXRX|TX_LED_LD, TX_LED_IO); + boost::this_thread::sleep(boost::posix_time::milliseconds(100)); + + this->get_iface()->set_gpio_out(dboard_iface::UNIT_RX, RX_LED_LD, RX_LED_IO); + boost::this_thread::sleep(boost::posix_time::milliseconds(100)); + + this->get_iface()->set_gpio_out(dboard_iface::UNIT_RX, RX_LED_RX1RX2|RX_LED_LD, RX_LED_IO); + boost::this_thread::sleep(boost::posix_time::milliseconds(100)); + + this->get_iface()->set_gpio_out(dboard_iface::UNIT_RX, RX_LED_LD, RX_LED_IO); + boost::this_thread::sleep(boost::posix_time::milliseconds(100)); + + this->get_iface()->set_gpio_out(dboard_iface::UNIT_RX, 0, RX_LED_IO); + boost::this_thread::sleep(boost::posix_time::milliseconds(100)); + + this->get_iface()->set_gpio_out(dboard_iface::UNIT_TX, TX_LED_LD, TX_LED_IO); + boost::this_thread::sleep(boost::posix_time::milliseconds(100)); + + this->get_iface()->set_gpio_out(dboard_iface::UNIT_TX, 0, TX_LED_IO); + boost::this_thread::sleep(boost::posix_time::milliseconds(100)); + + /* + //flash All LEDs + for (int i = 0; i < 3; i++) { + this->get_iface()->set_gpio_out(dboard_iface::UNIT_RX, 0, RX_LED_IO); + this->get_iface()->set_gpio_out(dboard_iface::UNIT_TX, 0, TX_LED_IO); + + boost::this_thread::sleep(boost::posix_time::milliseconds(100)); + + this->get_iface()->set_gpio_out(dboard_iface::UNIT_RX, RX_LED_IO, RX_LED_IO); + this->get_iface()->set_gpio_out(dboard_iface::UNIT_TX, TX_LED_IO, TX_LED_IO); + + boost::this_thread::sleep(boost::posix_time::milliseconds(100)); + } + */ + //Put LED gpios back in ATR control and update atr + this->get_iface()->set_pin_ctrl(dboard_iface::UNIT_TX, (TXIO_MASK|TX_LED_IO)); + this->get_iface()->set_pin_ctrl(dboard_iface::UNIT_RX, (RXIO_MASK|RX_LED_IO)); + this->get_iface()->set_gpio_ddr(dboard_iface::UNIT_TX, (TXIO_MASK|TX_LED_IO)); + this->get_iface()->set_gpio_ddr(dboard_iface::UNIT_RX, (RXIO_MASK|RX_LED_IO)); +} + diff --git a/host/lib/usrp/dboard/db_sbx_common.hpp b/host/lib/usrp/dboard/db_sbx_common.hpp new file mode 100644 index 000000000..5ff84811a --- /dev/null +++ b/host/lib/usrp/dboard/db_sbx_common.hpp @@ -0,0 +1,233 @@ +// +// Copyright 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/>. +// + + + +// Common IO Pins +#define LO_LPF_EN (1 << 15) +#define SYNTH_CE (1 << 3) +#define SYNTH_PDBRF (1 << 2) +#define SYNTH_MUXOUT (1 << 1) // INPUT!!! +#define LOCKDET_MASK (1 << 0) // INPUT!!! + +// TX IO Pins +#define TRSW (1 << 14) // 0 = TX, 1 = RX +#define TX_LED_TXRX (1 << 7) // LED for TX Antenna Selection TX/RX +#define TX_LED_LD (1 << 6) // LED for TX Lock Detect +#define DIS_POWER_TX (1 << 5) // on UNIT_TX, 0 powers up TX +#define TX_ENABLE (1 << 4) // on UNIT_TX, 0 disables TX Mixer + +// RX IO Pins +#define LNASW (1 << 14) // 0 = TX/RX, 1 = RX2 +#define RX_LED_RX1RX2 (1 << 7) // LED for RX Antenna Selection RX1/RX2 +#define RX_LED_LD (1 << 6) // LED for RX Lock Detect +#define DIS_POWER_RX (1 << 5) // on UNIT_RX, 0 powers up RX +#define RX_DISABLE (1 << 4) // on UNIT_RX, 1 disables RX Mixer and Baseband + +// RX Attenuator Pins +#define RX_ATTN_SHIFT 8 // lsb of RX Attenuator Control +#define RX_ATTN_MASK (63 << RX_ATTN_SHIFT) // valid bits of RX Attenuator Control + +// TX Attenuator Pins +#define TX_ATTN_SHIFT 8 // lsb of RX Attenuator Control +#define TX_ATTN_MASK (63 << TX_ATTN_SHIFT) // valid bits of RX Attenuator Control + +// Mixer functions +#define TX_MIXER_ENB (SYNTH_PDBRF) +#define TX_MIXER_DIS 0 + +#define RX_MIXER_ENB (SYNTH_PDBRF) +#define RX_MIXER_DIS 0 + +// Pin functions +#define TX_LED_IO (TX_LED_TXRX|TX_LED_LD) // LED gpio lines, pull down for LED +#define TXIO_MASK (LO_LPF_EN|TRSW|SYNTH_CE|SYNTH_PDBRF|TX_ATTN_MASK|DIS_POWER_TX|TX_ENABLE) + +#define RX_LED_IO (RX_LED_RX1RX2|RX_LED_LD) // LED gpio lines, pull down for LED +#define RXIO_MASK (LO_LPF_EN|LNASW|SYNTH_CE|SYNTH_PDBRF|RX_ATTN_MASK|DIS_POWER_RX|RX_DISABLE) + +// Power functions +#define TX_POWER_UP (SYNTH_CE|TX_ENABLE) +#define TX_POWER_DOWN (DIS_POWER_TX) + +#define RX_POWER_UP (SYNTH_CE) +#define RX_POWER_DOWN (DIS_POWER_RX) + +// Antenna constants +#define ANT_TX TRSW //the tx line is transmitting +#define ANT_RX 0 //the tx line is receiving +#define ANT_TXRX 0 //the rx line is on txrx +#define ANT_RX2 LNASW //the rx line in on rx2 +#define ANT_XX LNASW //dont care how the antenna is set + + +#include <uhd/types/dict.hpp> +#include <uhd/types/ranges.hpp> +#include <uhd/types/sensors.hpp> +#include <uhd/utils/assert_has.hpp> +#include <uhd/utils/log.hpp> +#include <uhd/utils/static.hpp> +#include <uhd/utils/algorithm.hpp> +#include <uhd/utils/msg.hpp> +#include <uhd/usrp/dboard_base.hpp> +#include <uhd/usrp/dboard_manager.hpp> +#include <boost/assign/list_of.hpp> +#include <boost/format.hpp> +#include <boost/math/special_functions/round.hpp> +#include <boost/thread.hpp> + + +using namespace uhd; +using namespace uhd::usrp; +using namespace boost::assign; + + +/*********************************************************************** + * The SBX dboard constants + **********************************************************************/ +static const freq_range_t sbx_freq_range(400e6, 4.4e9); + +static const freq_range_t sbx_tx_lo_2dbm = list_of + (range_t(0.35e9, 0.37e9)) +; + +static const freq_range_t sbx_enable_tx_lo_filter = list_of + (range_t(0.4e9, 1.5e9)) +; + +static const freq_range_t sbx_enable_rx_lo_filter = list_of + (range_t(0.4e9, 1.5e9)) +; + +static const prop_names_t sbx_tx_antennas = list_of("TX/RX"); + +static const prop_names_t sbx_rx_antennas = list_of("TX/RX")("RX2"); + +static const uhd::dict<std::string, gain_range_t> sbx_tx_gain_ranges = map_list_of + ("PGA0", gain_range_t(0, 31.5, double(0.5))) +; + +static const uhd::dict<std::string, gain_range_t> sbx_rx_gain_ranges = map_list_of + ("PGA0", gain_range_t(0, 31.5, double(0.5))) +; + +/*********************************************************************** + * The SBX dboard + **********************************************************************/ +class sbx_xcvr : public xcvr_dboard_base{ +public: + sbx_xcvr(ctor_args_t args); + ~sbx_xcvr(void); + + void rx_get(const wax::obj &key, wax::obj &val); + void rx_set(const wax::obj &key, const wax::obj &val); + + void tx_get(const wax::obj &key, wax::obj &val); + void tx_set(const wax::obj &key, const wax::obj &val); + +protected: + + uhd::dict<std::string, double> _tx_gains, _rx_gains; + double _rx_lo_freq, _tx_lo_freq; + std::string _tx_ant, _rx_ant; + + void set_rx_lo_freq(double freq); + void set_tx_lo_freq(double freq); + void set_rx_ant(const std::string &ant); + void set_tx_ant(const std::string &ant); + void set_rx_gain(double gain, const std::string &name); + void set_tx_gain(double gain, const std::string &name); + + void update_atr(void); + + /*! + * Set the LO frequency for the particular dboard unit. + * \param unit which unit rx or tx + * \param target_freq the desired frequency in Hz + * \return the actual frequency in Hz + */ + virtual double set_lo_freq(dboard_iface::unit_t unit, double target_freq); + + /*! + * Get the lock detect status of the LO. + * \param unit which unit rx or tx + * \return true for locked + */ + bool get_locked(dboard_iface::unit_t unit); + + /*! + * Flash the LEDs + */ + void flash_leds(void); + + /*! + * Version-agnostic ABC that wraps version-specific implementations of the + * WBX base daughterboard. + * + * This class is an abstract base class, and thus is impossible to + * instantiate. + */ + class sbx_versionx { + public: + sbx_versionx() {} + ~sbx_versionx(void) {} + + virtual double set_lo_freq(dboard_iface::unit_t unit, double target_freq) = 0; + }; + + /*! + * Version 3 of the SBX Daughterboard + */ + class sbx_version3 : public sbx_versionx { + public: + sbx_version3(sbx_xcvr *_self_sbx_xcvr); + ~sbx_version3(void); + + double set_lo_freq(dboard_iface::unit_t unit, double target_freq); + + /*! This is the registered instance of the wrapper class, sbx_base. */ + sbx_xcvr *self_base; + }; + + /*! + * Version 4 of the SBX Daughterboard + * + * The only difference in the fourth revision is the ADF4351 vs the ADF4350. + */ + class sbx_version4 : public sbx_versionx { + public: + sbx_version4(sbx_xcvr *_self_sbx_xcvr); + ~sbx_version4(void); + + double set_lo_freq(dboard_iface::unit_t unit, double target_freq); + + /*! This is the registered instance of the wrapper class, sbx_base. */ + sbx_xcvr *self_base; + }; + + /*! + * Handle to the version-specific implementation of the SBX. + * + * Since many of this class's functions are dependent on the version of the + * SBX board, this class will instantiate an object of the appropriate + * sbx_version* subclass, and invoke any relevant functions through that + * object. This pointer is set to the proper object at construction time. + */ + typedef boost::shared_ptr<sbx_versionx> sbx_versionx_sptr; + sbx_versionx_sptr db_actual; +}; + diff --git a/host/lib/usrp/dboard/db_sbx_version3.cpp b/host/lib/usrp/dboard/db_sbx_version3.cpp new file mode 100644 index 000000000..b5aad8aa5 --- /dev/null +++ b/host/lib/usrp/dboard/db_sbx_version3.cpp @@ -0,0 +1,186 @@ +// +// Copyright 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 "adf4350_regs.hpp" +#include "db_sbx_common.hpp" + + +using namespace uhd; +using namespace uhd::usrp; +using namespace boost::assign; + +/*********************************************************************** + * Structors + **********************************************************************/ +sbx_xcvr::sbx_version3::sbx_version3(sbx_xcvr *_self_sbx_xcvr) { + //register the handle to our base SBX class + self_base = _self_sbx_xcvr; +} + +sbx_xcvr::sbx_version3::~sbx_version3(void){ + /* NOP */ +} + + +/*********************************************************************** + * Tuning + **********************************************************************/ +double sbx_xcvr::sbx_version3::set_lo_freq(dboard_iface::unit_t unit, double target_freq) { + UHD_LOGV(often) << boost::format( + "SBX tune: target frequency %f Mhz" + ) % (target_freq/1e6) << std::endl; + + //clip the input + target_freq = sbx_freq_range.clip(target_freq); + + //map prescaler setting to mininmum integer divider (N) values (pg.18 prescaler) + static const uhd::dict<int, int> prescaler_to_min_int_div = map_list_of + (0,23) //adf4350_regs_t::PRESCALER_4_5 + (1,75) //adf4350_regs_t::PRESCALER_8_9 + ; + + //map rf divider select output dividers to enums + static const uhd::dict<int, adf4350_regs_t::rf_divider_select_t> rfdivsel_to_enum = map_list_of + (1, adf4350_regs_t::RF_DIVIDER_SELECT_DIV1) + (2, adf4350_regs_t::RF_DIVIDER_SELECT_DIV2) + (4, adf4350_regs_t::RF_DIVIDER_SELECT_DIV4) + (8, adf4350_regs_t::RF_DIVIDER_SELECT_DIV8) + (16, adf4350_regs_t::RF_DIVIDER_SELECT_DIV16) + ; + + double actual_freq, pfd_freq; + double ref_freq = self_base->get_iface()->get_clock_rate(unit); + int R=0, BS=0, N=0, FRAC=0, MOD=0; + int RFdiv = 1; + adf4350_regs_t::reference_divide_by_2_t T = adf4350_regs_t::REFERENCE_DIVIDE_BY_2_DISABLED; + adf4350_regs_t::reference_doubler_t D = adf4350_regs_t::REFERENCE_DOUBLER_DISABLED; + + //Reference doubler for 50% duty cycle + // if ref_freq < 12.5MHz enable regs.reference_divide_by_2 + if(ref_freq <= 12.5e6) D = adf4350_regs_t::REFERENCE_DOUBLER_ENABLED; + + //increase RF divider until acceptable VCO frequency + //start with target_freq*2 because mixer has divide by 2 + double vco_freq = target_freq; + while (vco_freq < 2.2e9) { + vco_freq *= 2; + RFdiv *= 2; + } + + //use 8/9 prescaler for vco_freq > 3 GHz (pg.18 prescaler) + adf4350_regs_t::prescaler_t prescaler = vco_freq > 3e9 ? adf4350_regs_t::PRESCALER_8_9 : adf4350_regs_t::PRESCALER_4_5; + + /* + * The goal here is to loop though possible R dividers, + * band select clock dividers, N (int) dividers, and FRAC + * (frac) dividers. + * + * Calculate the N and F dividers for each set of values. + * The loop exists when it meets all of the constraints. + * The resulting loop values are loaded into the registers. + * + * from pg.21 + * + * f_pfd = f_ref*(1+D)/(R*(1+T)) + * f_vco = (N + (FRAC/MOD))*f_pfd + * N = f_vco/f_pfd - FRAC/MOD = f_vco*((R*(T+1))/(f_ref*(1+D))) - FRAC/MOD + * f_rf = f_vco/RFdiv) + * f_actual = f_rf/2 + */ + for(R = 1; R <= 1023; R+=1){ + //PFD input frequency = f_ref/R ... ignoring Reference doubler/divide-by-2 (D & T) + pfd_freq = ref_freq*(1+D)/(R*(1+T)); + + //keep the PFD frequency at or below 25MHz (Loop Filter Bandwidth) + if (pfd_freq > 25e6) continue; + + //ignore fractional part of tuning + N = int(std::floor(vco_freq/pfd_freq)); + + //keep N > minimum int divider requirement + if (N < prescaler_to_min_int_div[prescaler]) continue; + + for(BS=1; BS <= 255; BS+=1){ + //keep the band select frequency at or below 100KHz + //constraint on band select clock + if (pfd_freq/BS > 100e3) continue; + goto done_loop; + } + } done_loop: + + //Fractional-N calculation + MOD = 4095; //max fractional accuracy + FRAC = int((vco_freq/pfd_freq - N)*MOD); + + //Reference divide-by-2 for 50% duty cycle + // if R even, move one divide by 2 to to regs.reference_divide_by_2 + if(R % 2 == 0){ + T = adf4350_regs_t::REFERENCE_DIVIDE_BY_2_ENABLED; + R /= 2; + } + + //actual frequency calculation + actual_freq = double((N + (double(FRAC)/double(MOD)))*ref_freq*(1+int(D))/(R*(1+int(T)))/RFdiv); + + UHD_LOGV(often) + << boost::format("SBX Intermediates: ref=%0.2f, outdiv=%f, fbdiv=%f") % (ref_freq*(1+int(D))/(R*(1+int(T)))) % double(RFdiv*2) % double(N + double(FRAC)/double(MOD)) << std::endl + << boost::format("SBX tune: R=%d, BS=%d, N=%d, FRAC=%d, MOD=%d, T=%d, D=%d, RFdiv=%d, LD=%d" + ) % R % BS % N % FRAC % MOD % T % D % RFdiv % self_base->get_locked(unit)<< std::endl + << boost::format("SBX Frequencies (MHz): REQ=%0.2f, ACT=%0.2f, VCO=%0.2f, PFD=%0.2f, BAND=%0.2f" + ) % (target_freq/1e6) % (actual_freq/1e6) % (vco_freq/1e6) % (pfd_freq/1e6) % (pfd_freq/BS/1e6) << std::endl; + + //load the register values + adf4350_regs_t regs; + + if ((unit == dboard_iface::UNIT_TX) and (actual_freq == sbx_tx_lo_2dbm.clip(actual_freq))) + regs.output_power = adf4350_regs_t::OUTPUT_POWER_2DBM; + else + regs.output_power = adf4350_regs_t::OUTPUT_POWER_5DBM; + + regs.frac_12_bit = FRAC; + regs.int_16_bit = N; + regs.mod_12_bit = MOD; + regs.prescaler = prescaler; + regs.r_counter_10_bit = R; + regs.reference_divide_by_2 = T; + regs.reference_doubler = D; + regs.band_select_clock_div = BS; + UHD_ASSERT_THROW(rfdivsel_to_enum.has_key(RFdiv)); + regs.rf_divider_select = rfdivsel_to_enum[RFdiv]; + + //write the registers + //correct power-up sequence to write registers (5, 4, 3, 2, 1, 0) + int addr; + + for(addr=5; addr>=0; addr--){ + UHD_LOGV(often) << boost::format( + "SBX SPI Reg (0x%02x): 0x%08x" + ) % addr % regs.get_reg(addr) << std::endl; + self_base->get_iface()->write_spi( + unit, spi_config_t::EDGE_RISE, + regs.get_reg(addr), 32 + ); + } + + //return the actual frequency + UHD_LOGV(often) << boost::format( + "SBX tune: actual frequency %f Mhz" + ) % (actual_freq/1e6) << std::endl; + return actual_freq; +} + diff --git a/host/lib/usrp/dboard/db_sbx_version4.cpp b/host/lib/usrp/dboard/db_sbx_version4.cpp new file mode 100644 index 000000000..ea0acb699 --- /dev/null +++ b/host/lib/usrp/dboard/db_sbx_version4.cpp @@ -0,0 +1,189 @@ +// +// Copyright 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 "adf4351_regs.hpp" +#include "db_sbx_common.hpp" + + +using namespace uhd; +using namespace uhd::usrp; +using namespace boost::assign; + +/*********************************************************************** + * Structors + **********************************************************************/ +sbx_xcvr::sbx_version4::sbx_version4(sbx_xcvr *_self_sbx_xcvr) { + //register the handle to our base SBX class + self_base = _self_sbx_xcvr; +} + + +sbx_xcvr::sbx_version4::~sbx_version4(void){ + /* NOP */ +} + + +/*********************************************************************** + * Tuning + **********************************************************************/ +double sbx_xcvr::sbx_version4::set_lo_freq(dboard_iface::unit_t unit, double target_freq) { + UHD_LOGV(often) << boost::format( + "SBX tune: target frequency %f Mhz" + ) % (target_freq/1e6) << std::endl; + + //clip the input + target_freq = sbx_freq_range.clip(target_freq); + + //map prescaler setting to mininmum integer divider (N) values (pg.18 prescaler) + static const uhd::dict<int, int> prescaler_to_min_int_div = map_list_of + (0,23) //adf4351_regs_t::PRESCALER_4_5 + (1,75) //adf4351_regs_t::PRESCALER_8_9 + ; + + //map rf divider select output dividers to enums + static const uhd::dict<int, adf4351_regs_t::rf_divider_select_t> rfdivsel_to_enum = map_list_of + (1, adf4351_regs_t::RF_DIVIDER_SELECT_DIV1) + (2, adf4351_regs_t::RF_DIVIDER_SELECT_DIV2) + (4, adf4351_regs_t::RF_DIVIDER_SELECT_DIV4) + (8, adf4351_regs_t::RF_DIVIDER_SELECT_DIV8) + (16, adf4351_regs_t::RF_DIVIDER_SELECT_DIV16) + (32, adf4351_regs_t::RF_DIVIDER_SELECT_DIV16) + (64, adf4351_regs_t::RF_DIVIDER_SELECT_DIV16) + ; + + double actual_freq, pfd_freq; + double ref_freq = self_base->get_iface()->get_clock_rate(unit); + int R=0, BS=0, N=0, FRAC=0, MOD=0; + int RFdiv = 1; + adf4351_regs_t::reference_divide_by_2_t T = adf4351_regs_t::REFERENCE_DIVIDE_BY_2_DISABLED; + adf4351_regs_t::reference_doubler_t D = adf4351_regs_t::REFERENCE_DOUBLER_DISABLED; + + //Reference doubler for 50% duty cycle + // if ref_freq < 12.5MHz enable regs.reference_divide_by_2 + if(ref_freq <= 12.5e6) D = adf4351_regs_t::REFERENCE_DOUBLER_ENABLED; + + //increase RF divider until acceptable VCO frequency + //start with target_freq*2 because mixer has divide by 2 + double vco_freq = target_freq; + while (vco_freq < 2.2e9) { + vco_freq *= 2; + RFdiv *= 2; + } + + //use 8/9 prescaler for vco_freq > 3 GHz (pg.18 prescaler) + adf4351_regs_t::prescaler_t prescaler = vco_freq > 3e9 ? adf4351_regs_t::PRESCALER_8_9 : adf4351_regs_t::PRESCALER_4_5; + + /* + * The goal here is to loop though possible R dividers, + * band select clock dividers, N (int) dividers, and FRAC + * (frac) dividers. + * + * Calculate the N and F dividers for each set of values. + * The loop exists when it meets all of the constraints. + * The resulting loop values are loaded into the registers. + * + * from pg.21 + * + * f_pfd = f_ref*(1+D)/(R*(1+T)) + * f_vco = (N + (FRAC/MOD))*f_pfd + * N = f_vco/f_pfd - FRAC/MOD = f_vco*((R*(T+1))/(f_ref*(1+D))) - FRAC/MOD + * f_rf = f_vco/RFdiv) + * f_actual = f_rf/2 + */ + for(R = 1; R <= 1023; R+=1){ + //PFD input frequency = f_ref/R ... ignoring Reference doubler/divide-by-2 (D & T) + pfd_freq = ref_freq*(1+D)/(R*(1+T)); + + //keep the PFD frequency at or below 25MHz (Loop Filter Bandwidth) + if (pfd_freq > 25e6) continue; + + //ignore fractional part of tuning + N = int(std::floor(vco_freq/pfd_freq)); + + //keep N > minimum int divider requirement + if (N < prescaler_to_min_int_div[prescaler]) continue; + + for(BS=1; BS <= 255; BS+=1){ + //keep the band select frequency at or below 100KHz + //constraint on band select clock + if (pfd_freq/BS > 100e3) continue; + goto done_loop; + } + } done_loop: + + //Fractional-N calculation + MOD = 4095; //max fractional accuracy + FRAC = int((vco_freq/pfd_freq - N)*MOD); + + //Reference divide-by-2 for 50% duty cycle + // if R even, move one divide by 2 to to regs.reference_divide_by_2 + if(R % 2 == 0){ + T = adf4351_regs_t::REFERENCE_DIVIDE_BY_2_ENABLED; + R /= 2; + } + + //actual frequency calculation + actual_freq = double((N + (double(FRAC)/double(MOD)))*ref_freq*(1+int(D))/(R*(1+int(T)))/RFdiv); + + UHD_LOGV(often) + << boost::format("SBX Intermediates: ref=%0.2f, outdiv=%f, fbdiv=%f") % (ref_freq*(1+int(D))/(R*(1+int(T)))) % double(RFdiv*2) % double(N + double(FRAC)/double(MOD)) << std::endl + << boost::format("SBX tune: R=%d, BS=%d, N=%d, FRAC=%d, MOD=%d, T=%d, D=%d, RFdiv=%d, LD=%d" + ) % R % BS % N % FRAC % MOD % T % D % RFdiv % self_base->get_locked(unit)<< std::endl + << boost::format("SBX Frequencies (MHz): REQ=%0.2f, ACT=%0.2f, VCO=%0.2f, PFD=%0.2f, BAND=%0.2f" + ) % (target_freq/1e6) % (actual_freq/1e6) % (vco_freq/1e6) % (pfd_freq/1e6) % (pfd_freq/BS/1e6) << std::endl; + + //load the register values + adf4351_regs_t regs; + + if ((unit == dboard_iface::UNIT_TX) and (actual_freq == sbx_tx_lo_2dbm.clip(actual_freq))) + regs.output_power = adf4351_regs_t::OUTPUT_POWER_2DBM; + else + regs.output_power = adf4351_regs_t::OUTPUT_POWER_5DBM; + + regs.frac_12_bit = FRAC; + regs.int_16_bit = N; + regs.mod_12_bit = MOD; + regs.prescaler = prescaler; + regs.r_counter_10_bit = R; + regs.reference_divide_by_2 = T; + regs.reference_doubler = D; + regs.band_select_clock_div = BS; + UHD_ASSERT_THROW(rfdivsel_to_enum.has_key(RFdiv)); + regs.rf_divider_select = rfdivsel_to_enum[RFdiv]; + + //write the registers + //correct power-up sequence to write registers (5, 4, 3, 2, 1, 0) + int addr; + + for(addr=5; addr>=0; addr--){ + UHD_LOGV(often) << boost::format( + "SBX SPI Reg (0x%02x): 0x%08x" + ) % addr % regs.get_reg(addr) << std::endl; + self_base->get_iface()->write_spi( + unit, spi_config_t::EDGE_RISE, + regs.get_reg(addr), 32 + ); + } + + //return the actual frequency + UHD_LOGV(often) << boost::format( + "SBX tune: actual frequency %f Mhz" + ) % (actual_freq/1e6) << std::endl; + return actual_freq; +} + |