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Diffstat (limited to 'host/lib/usrp/dboard/magnesium/magnesium_bands.cpp')
| -rw-r--r-- | host/lib/usrp/dboard/magnesium/magnesium_bands.cpp | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/host/lib/usrp/dboard/magnesium/magnesium_bands.cpp b/host/lib/usrp/dboard/magnesium/magnesium_bands.cpp new file mode 100644 index 000000000..22d7502b6 --- /dev/null +++ b/host/lib/usrp/dboard/magnesium/magnesium_bands.cpp @@ -0,0 +1,155 @@ +// +// Copyright 2017 Ettus Research, a National Instruments Company +// +// SPDX-License-Identifier: GPL-3.0 +// + +// The band plan + +#include "magnesium_radio_ctrl_impl.hpp" +#include "magnesium_constants.hpp" +#include <uhd/utils/math.hpp> + +/* + * Magnesium Rev C frequency bands: + * + * RX IF frequency is 2.4418 GHz. Have 80 MHz of bandwidth for loband. + * TX IF frequency is 1.8-2.1 GHz (1.95 GHz is best). + * + * For RX: + * Band SW2-AB SW3-ABC SW4-ABC SW5-ABCD SW6-ABC SW7-AB SW8-AB MIX + * WB RF1 01 OFF 111 NA --- NA ---- RF3 001 RF2 01 RF2 01 0 + * LB RF2 10 RF5 100 NA --- RF3 0010 RF1 100 RF1 10 RF1 10 1 + * 440-530 RF2 10 RF2 001 NA --- RF1 1000 RF1 100 RF2 01 RF2 01 0 + * 650-1000 RF2 10 RF6 101 NA --- RF4 0001 RF1 100 RF2 01 RF2 01 0 + * 1100-1575 RF2 10 RF4 011 NA --- RF2 0100 RF1 100 RF2 01 RF2 01 0 + * 1600-2250 RF2 10 RF3 010 RF2 010 NA ---- RF2 010 RF2 01 RF2 01 0 + * 2100-2850 RF2 10 RF1 000 RF1 100 NA ---- RF2 010 RF2 01 RF2 01 0 + * 2700+ RF3 11 OFF 111 RF3 001 NA ---- RF2 010 RF2 01 RF2 01 0 + * + * For TX: + * Band SW5-AB SW4-AB SW3-X SW2-ABCD SW1-AB SWTRX-AB MIX + * WB RF1 10 RF2 01 RF1 0 NA ---- SHD 00 RF4 11 0 + * LB RF2 01 RF1 10 RF2 1 RF3 0010 RF3 11 RF1 00 1 + * <800 RF1 10 RF2 01 RF2 1 RF3 0010 RF3 11 RF1 00 0 + * 800-1700 RF1 10 RF2 01 RF2 1 RF2 0100 RF2 10 RF1 00 0 + * 1700-3400 RF1 10 RF2 01 RF2 1 RF1 1000 RF1 01 RF1 00 0 + * 3400-6400 RF1 10 RF2 01 RF2 1 RF4 0001 SHD 00 RF2 10 0 + */ + +using namespace uhd; +using namespace uhd::usrp; +using namespace uhd::rfnoc; +using namespace uhd::math::fp_compare; + +namespace { + /* Note on the RX filter bank: + * + * The RX path has 7 bands, which we call BAND0 through BAND7. BAND0 is the + * lowest frequency band (it goes through F44, the 490 MHz low pass filter, + * on the first channel). BAND7 is the highest frequency band, it goes + * through the 2.7 GHz high pass filter (F43 on the first channel). + * + * For all frequencies, there are gain values where we bypass the filter + * bank. In this case, the band setting does not apply (does not have any + * meaning). + * + * The lowband, when not disabling the filter bank, always goes through + * BAND0, but there are non-lowband frequencies which can also go through + * BAND0. + * + * The following constants define lower cutoff frequencies for each band. + * BAND0 does not have a lower cutoff frequency, it is implied by + * MAGNESIUM_MIN_FREQ. MAGNESIUM_RX_BAND1_MIN_FREQ is the cutover frequency + * for switching from BAND0 to BAND1, and so on. + * + * Bands 1-6 have both high- and low-pass filters (effectively band + * passes). Frequencies need to be chosen to allow as much of the full + * bandwidth through unattenuated. + */ + constexpr double MAGNESIUM_RX_BAND1_MIN_FREQ = 430e6; + constexpr double MAGNESIUM_RX_BAND2_MIN_FREQ = 600e6; + constexpr double MAGNESIUM_RX_BAND3_MIN_FREQ = 1050e6; + constexpr double MAGNESIUM_RX_BAND4_MIN_FREQ = 1600e6; + constexpr double MAGNESIUM_RX_BAND5_MIN_FREQ = 2100e6; + constexpr double MAGNESIUM_RX_BAND6_MIN_FREQ = 2700e6; + + /* Note on the TX filter bank: + * + * The TX path has 4 bands, which we call BAND0 through BAND3. + * For all frequencies, there are gain values where we bypass the filter + * bank. In this case, the band setting does not apply (does not have any + * meaning). + * + * The lowband, when not disabling the filter bank, always goes through + * BAND0, but there are non-lowband frequencies which can also go through + * BAND0. + * + * The following constants define lower cutoff frequencies for each band. + * BAND0 does not have a lower cutoff frequency, it is implied by + * MAGNESIUM_MIN_FREQ. MAGNESIUM_TX_BAND1_MIN_FREQ is the cutover frequency + * for switching from BAND0 to BAND1, and so on. + * + * On current Magnesium revisions, all filters on the TX filter bank are + * low pass filters (no high pass filters). + * Frequencies need to be chosen to allow as much of the full bandwidth + * through unattenuated (so don't go all the way up to the cutoff frequency + * of that filter, OK). + */ + constexpr double MAGNESIUM_TX_BAND1_MIN_FREQ = 723.17e6; + constexpr double MAGNESIUM_TX_BAND2_MIN_FREQ = 1623.17e6; + constexpr double MAGNESIUM_TX_BAND3_MIN_FREQ = 3323.17e6; +} + +magnesium_radio_ctrl_impl::rx_band +magnesium_radio_ctrl_impl::_map_freq_to_rx_band(const double freq) { + magnesium_radio_ctrl_impl::rx_band band; + + if (fp_compare_epsilon<double>(freq) < MAGNESIUM_MIN_FREQ) { + band = rx_band::INVALID_BAND; + } else if (fp_compare_epsilon<double>(freq) < MAGNESIUM_LOWBAND_FREQ) { + band = rx_band::LOWBAND; + } else if (fp_compare_epsilon<double>(freq) < MAGNESIUM_RX_BAND1_MIN_FREQ) { + band = rx_band::BAND0; + } else if (fp_compare_epsilon<double>(freq) < MAGNESIUM_RX_BAND2_MIN_FREQ) { + band = rx_band::BAND1; + } else if (fp_compare_epsilon<double>(freq) < MAGNESIUM_RX_BAND3_MIN_FREQ) { + band = rx_band::BAND2; + } else if (fp_compare_epsilon<double>(freq) < MAGNESIUM_RX_BAND4_MIN_FREQ) { + band = rx_band::BAND3; + } else if (fp_compare_epsilon<double>(freq) < MAGNESIUM_RX_BAND5_MIN_FREQ) { + band = rx_band::BAND4; + } else if (fp_compare_epsilon<double>(freq) < MAGNESIUM_RX_BAND6_MIN_FREQ) { + band = rx_band::BAND5; + } else if (fp_compare_epsilon<double>(freq) <= MAGNESIUM_MAX_FREQ) { + band = rx_band::BAND6; + } else { + band = rx_band::INVALID_BAND; + } + + return band; +} + +magnesium_radio_ctrl_impl::tx_band +magnesium_radio_ctrl_impl::_map_freq_to_tx_band(const double freq) { + magnesium_radio_ctrl_impl::tx_band band; + + if (fp_compare_epsilon<double>(freq) < MAGNESIUM_MIN_FREQ) { + band = tx_band::INVALID_BAND; + } else if (fp_compare_epsilon<double>(freq) < MAGNESIUM_LOWBAND_FREQ) { + band = tx_band::LOWBAND; + } else if (fp_compare_epsilon<double>(freq) < MAGNESIUM_TX_BAND1_MIN_FREQ) { + band = tx_band::BAND0; + } else if (fp_compare_epsilon<double>(freq) < MAGNESIUM_TX_BAND2_MIN_FREQ) { + band = tx_band::BAND1; + } else if (fp_compare_epsilon<double>(freq) < MAGNESIUM_TX_BAND3_MIN_FREQ) { + band = tx_band::BAND2; + } else if (fp_compare_epsilon<double>(freq) <= MAGNESIUM_MAX_FREQ) { + band = tx_band::BAND3; + } else { + band = tx_band::INVALID_BAND; + } + + return band; +} + |