| /* |
| * Copyright 2018 sysmocom - s.f.m.c. GmbH |
| * |
| This program is free software: you can redistribute it and/or modify |
| it under the terms of the GNU Affero 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 Affero General Public License for more details. |
| |
| You should have received a copy of the GNU Affero General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include <stdint.h> |
| #include <string.h> |
| #include <stdlib.h> |
| #include "Logger.h" |
| #include "Threads.h" |
| #include "LMSDevice.h" |
| |
| #include <lime/LimeSuite.h> |
| |
| #include <osmocom/core/utils.h> |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| using namespace std; |
| |
| constexpr double LMSDevice::masterClockRate; |
| |
| #define MAX_ANTENNA_LIST_SIZE 10 |
| #define LMS_SAMPLE_RATE GSMRATE*32 |
| #define GSM_CARRIER_BW 270000.0 /* 270kHz */ |
| #define LMS_MIN_BW_SUPPORTED 2.5e6 /* 2.5mHz, minimum supported by LMS */ |
| #define LMS_CALIBRATE_BW_HZ OSMO_MAX(GSM_CARRIER_BW, LMS_MIN_BW_SUPPORTED) |
| |
| LMSDevice::LMSDevice(size_t tx_sps, size_t rx_sps, InterfaceType iface, size_t chans, double lo_offset, |
| const std::vector<std::string>& tx_paths, |
| const std::vector<std::string>& rx_paths): |
| RadioDevice(tx_sps, rx_sps, iface, chans, lo_offset, tx_paths, rx_paths), |
| m_lms_dev(NULL) |
| { |
| LOGC(DDEV, INFO) << "creating LMS device..."; |
| |
| m_lms_stream_rx.resize(chans); |
| m_lms_stream_tx.resize(chans); |
| |
| m_last_rx_underruns.resize(chans, 0); |
| m_last_rx_overruns.resize(chans, 0); |
| m_last_tx_underruns.resize(chans, 0); |
| m_last_tx_overruns.resize(chans, 0); |
| } |
| |
| LMSDevice::~LMSDevice() |
| { |
| LOGC(DDEV, INFO) << "Closing LMS device"; |
| if (m_lms_dev) { |
| LMS_Close(m_lms_dev); |
| m_lms_dev = NULL; |
| } |
| } |
| |
| static void lms_log_callback(int lvl, const char *msg) |
| { |
| /* map lime specific log levels */ |
| static const int lvl_map[5] = { |
| [0] = LOGL_FATAL, |
| [LMS_LOG_ERROR] = LOGL_ERROR, |
| [LMS_LOG_WARNING] = LOGL_NOTICE, |
| [LMS_LOG_INFO] = LOGL_INFO, |
| [LMS_LOG_DEBUG] = LOGL_DEBUG, |
| }; |
| /* protect against future higher log level values (lower importance) */ |
| if ((unsigned int) lvl >= ARRAY_SIZE(lvl_map)) |
| lvl = ARRAY_SIZE(lvl_map)-1; |
| |
| LOGLV(DLMS, lvl_map[lvl]) << msg; |
| } |
| |
| static void thread_enable_cancel(bool cancel) |
| { |
| cancel ? pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) : |
| pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL); |
| } |
| |
| static void print_range(const char* name, lms_range_t *range) |
| { |
| LOGC(DDEV, INFO) << name << ": Min=" << range->min << " Max=" << range->max |
| << " Step=" << range->step; |
| } |
| |
| int LMSDevice::open(const std::string &args, int ref, bool swap_channels) |
| { |
| //lms_info_str_t dev_str; |
| lms_info_str_t* info_list; |
| lms_range_t range_lpfbw_rx, range_lpfbw_tx, range_sr; |
| float_type sr_host, sr_rf, lpfbw_rx, lpfbw_tx; |
| uint16_t dac_val; |
| unsigned int i, n; |
| int rc; |
| |
| LOGC(DDEV, INFO) << "Opening LMS device.."; |
| |
| LMS_RegisterLogHandler(&lms_log_callback); |
| |
| if ((n = LMS_GetDeviceList(NULL)) < 0) |
| LOGC(DDEV, ERROR) << "LMS_GetDeviceList(NULL) failed"; |
| LOGC(DDEV, INFO) << "Devices found: " << n; |
| if (n < 1) |
| return -1; |
| |
| info_list = new lms_info_str_t[n]; |
| |
| if (LMS_GetDeviceList(info_list) < 0) |
| LOGC(DDEV, ERROR) << "LMS_GetDeviceList(info_list) failed"; |
| |
| for (i = 0; i < n; i++) |
| LOGC(DDEV, INFO) << "Device [" << i << "]: " << info_list[i]; |
| |
| rc = LMS_Open(&m_lms_dev, info_list[0], NULL); |
| if (rc != 0) { |
| LOGC(DDEV, ERROR) << "LMS_GetDeviceList() failed)"; |
| delete [] info_list; |
| return -1; |
| } |
| |
| delete [] info_list; |
| |
| LOGC(DDEV, INFO) << "Init LMS device"; |
| if (LMS_Init(m_lms_dev) != 0) { |
| LOGC(DDEV, ERROR) << "LMS_Init() failed"; |
| goto out_close; |
| } |
| |
| if (LMS_GetSampleRateRange(m_lms_dev, LMS_CH_RX, &range_sr)) |
| goto out_close; |
| print_range("Sample Rate", &range_sr); |
| |
| LOGC(DDEV, INFO) << "Setting sample rate to " << GSMRATE*tx_sps << " " << tx_sps; |
| if (LMS_SetSampleRate(m_lms_dev, GSMRATE*tx_sps, 32) < 0) |
| goto out_close; |
| |
| if (LMS_GetSampleRate(m_lms_dev, LMS_CH_RX, 0, &sr_host, &sr_rf)) |
| goto out_close; |
| LOGC(DDEV, INFO) << "Sample Rate: Host=" << sr_host << " RF=" << sr_rf; |
| |
| /* FIXME: make this device/model dependent, like UHDDevice:dev_param_map! */ |
| ts_offset = static_cast<TIMESTAMP>(8.9e-5 * GSMRATE * tx_sps); /* time * sample_rate */ |
| |
| switch (ref) { |
| case REF_INTERNAL: |
| LOGC(DDEV, INFO) << "Setting Internal clock reference"; |
| /* Ugly API: Selecting clock source implicit by writing to VCTCXO DAC ?!? */ |
| if (LMS_VCTCXORead(m_lms_dev, &dac_val) < 0) |
| goto out_close; |
| LOGC(DDEV, INFO) << "Setting VCTCXO to " << dac_val; |
| if (LMS_VCTCXOWrite(m_lms_dev, dac_val) < 0) |
| goto out_close; |
| break; |
| case REF_EXTERNAL: |
| LOGC(DDEV, INFO) << "Setting External clock reference to " << 10000000.0; |
| /* Assume an external 10 MHz reference clock */ |
| if (LMS_SetClockFreq(m_lms_dev, LMS_CLOCK_EXTREF, 10000000.0) < 0) |
| goto out_close; |
| break; |
| default: |
| LOGC(DDEV, ALERT) << "Invalid reference type"; |
| goto out_close; |
| } |
| |
| if (LMS_GetLPFBWRange(m_lms_dev, LMS_CH_RX, &range_lpfbw_rx)) |
| goto out_close; |
| print_range("LPFBWRange Rx", &range_lpfbw_rx); |
| if (LMS_GetLPFBWRange(m_lms_dev, LMS_CH_RX, &range_lpfbw_tx)) |
| goto out_close; |
| print_range("LPFBWRange Tx", &range_lpfbw_tx); |
| lpfbw_rx = OSMO_MIN(OSMO_MAX(1.4001e6, range_lpfbw_rx.min), range_lpfbw_rx.max); |
| lpfbw_tx = OSMO_MIN(OSMO_MAX(5.2e6, range_lpfbw_tx.min), range_lpfbw_tx.max); |
| |
| LOGC(DDEV, INFO) << "LPFBW: Rx=" << lpfbw_rx << " Tx=" << lpfbw_tx; |
| |
| if (!set_antennas()) { |
| LOGC(DDEV, ALERT) << "LMS antenna setting failed"; |
| return -1; |
| } |
| |
| /* Perform Rx and Tx calibration */ |
| for (i=0; i<chans; i++) { |
| LOGC(DDEV, INFO) << "Setting LPFBW chan " << i; |
| if (LMS_SetLPFBW(m_lms_dev, LMS_CH_RX, i, lpfbw_rx) < 0) |
| goto out_close; |
| if (LMS_SetLPFBW(m_lms_dev, LMS_CH_TX, i, lpfbw_tx) < 0) |
| goto out_close; |
| LOGC(DDEV, INFO) << "Calibrating chan " << i; |
| if (LMS_Calibrate(m_lms_dev, LMS_CH_RX, i, LMS_CALIBRATE_BW_HZ, 0) < 0) |
| goto out_close; |
| if (LMS_Calibrate(m_lms_dev, LMS_CH_TX, i, LMS_CALIBRATE_BW_HZ, 0) < 0) |
| goto out_close; |
| } |
| |
| samplesRead = 0; |
| samplesWritten = 0; |
| started = false; |
| |
| return NORMAL; |
| |
| out_close: |
| LOGC(DDEV, ALERT) << "Error in LMS open, closing: " << LMS_GetLastErrorMessage(); |
| LMS_Close(m_lms_dev); |
| m_lms_dev = NULL; |
| return -1; |
| } |
| |
| bool LMSDevice::start() |
| { |
| LOGC(DDEV, INFO) << "starting LMS..."; |
| |
| unsigned int i; |
| |
| if (started) { |
| LOGC(DDEV, ERR) << "Device already started"; |
| return false; |
| } |
| |
| /* configure the channels/streams */ |
| for (i=0; i<chans; i++) { |
| if (LMS_EnableChannel(m_lms_dev, LMS_CH_RX, i, true) < 0) |
| return false; |
| |
| if (LMS_EnableChannel(m_lms_dev, LMS_CH_TX, i, true) < 0) |
| return false; |
| |
| // Set gains to midpoint |
| setTxGain((minTxGain() + maxTxGain()) / 2, i); |
| setRxGain((minRxGain() + maxRxGain()) / 2, i); |
| |
| m_lms_stream_rx[i] = {}; |
| m_lms_stream_rx[i].isTx = false; |
| m_lms_stream_rx[i].channel = i; |
| m_lms_stream_rx[i].fifoSize = 1024 * 1024; |
| m_lms_stream_rx[i].throughputVsLatency = 0.3; |
| m_lms_stream_rx[i].dataFmt = lms_stream_t::LMS_FMT_I16; |
| |
| m_lms_stream_tx[i] = {}; |
| m_lms_stream_tx[i].isTx = true; |
| m_lms_stream_tx[i].channel = i; |
| m_lms_stream_tx[i].fifoSize = 1024 * 1024; |
| m_lms_stream_tx[i].throughputVsLatency = 0.3; |
| m_lms_stream_tx[i].dataFmt = lms_stream_t::LMS_FMT_I16; |
| |
| if (LMS_SetupStream(m_lms_dev, &m_lms_stream_rx[i]) < 0) |
| return false; |
| |
| if (LMS_SetupStream(m_lms_dev, &m_lms_stream_tx[i]) < 0) |
| return false; |
| } |
| |
| /* now start the streams in a second loop, as we can no longer call |
| * LMS_SetupStream() after LMS_StartStream() of the first stream */ |
| for (i = 0; i < chans; i++) { |
| if (LMS_StartStream(&m_lms_stream_rx[i]) < 0) |
| return false; |
| |
| if (LMS_StartStream(&m_lms_stream_tx[i]) < 0) |
| return false; |
| } |
| |
| flush_recv(10); |
| |
| started = true; |
| return true; |
| } |
| |
| bool LMSDevice::stop() |
| { |
| unsigned int i; |
| |
| if (!started) |
| return true; |
| |
| for (i=0; i<chans; i++) { |
| LMS_StopStream(&m_lms_stream_tx[i]); |
| LMS_StopStream(&m_lms_stream_rx[i]); |
| } |
| |
| for (i=0; i<chans; i++) { |
| LMS_DestroyStream(m_lms_dev, &m_lms_stream_tx[i]); |
| LMS_DestroyStream(m_lms_dev, &m_lms_stream_rx[i]); |
| LMS_EnableChannel(m_lms_dev, LMS_CH_RX, i, false); |
| LMS_EnableChannel(m_lms_dev, LMS_CH_TX, i, false); |
| } |
| |
| started = false; |
| return true; |
| } |
| |
| double LMSDevice::maxTxGain() |
| { |
| return 73.0; |
| } |
| |
| double LMSDevice::minTxGain() |
| { |
| return 0.0; |
| } |
| |
| double LMSDevice::maxRxGain() |
| { |
| return 73.0; |
| } |
| |
| double LMSDevice::minRxGain() |
| { |
| return 0.0; |
| } |
| |
| double LMSDevice::setTxGain(double dB, size_t chan) |
| { |
| if (dB > maxTxGain()) |
| dB = maxTxGain(); |
| if (dB < minTxGain()) |
| dB = minTxGain(); |
| |
| LOGC(DDEV, NOTICE) << "Setting TX gain to " << dB << " dB."; |
| |
| if (LMS_SetGaindB(m_lms_dev, LMS_CH_TX, chan, dB) < 0) |
| LOGC(DDEV, ERR) << "Error setting TX gain"; |
| |
| return dB; |
| } |
| |
| double LMSDevice::setRxGain(double dB, size_t chan) |
| { |
| if (dB > maxRxGain()) |
| dB = maxRxGain(); |
| if (dB < minRxGain()) |
| dB = minRxGain(); |
| |
| LOGC(DDEV, NOTICE) << "Setting RX gain to " << dB << " dB."; |
| |
| if (LMS_SetGaindB(m_lms_dev, LMS_CH_RX, chan, dB) < 0) |
| LOGC(DDEV, ERR) << "Error setting RX gain"; |
| |
| return dB; |
| } |
| |
| int LMSDevice::get_ant_idx(const std::string & name, bool dir_tx, size_t chan) |
| { |
| lms_name_t name_list[MAX_ANTENNA_LIST_SIZE]; /* large enough list for antenna names. */ |
| const char* c_name = name.c_str(); |
| int num_names; |
| int i; |
| |
| num_names = LMS_GetAntennaList(m_lms_dev, dir_tx, chan, name_list); |
| for (i = 0; i < num_names; i++) { |
| if (!strcmp(c_name, name_list[i])) |
| return i; |
| } |
| return -1; |
| } |
| |
| bool LMSDevice::flush_recv(size_t num_pkts) |
| { |
| #define CHUNK 625 |
| int len = CHUNK * tx_sps; |
| short *buffer = new short[len * 2]; |
| int rc; |
| lms_stream_meta_t rx_metadata = {}; |
| rx_metadata.flushPartialPacket = false; |
| rx_metadata.waitForTimestamp = false; |
| |
| ts_initial = 0; |
| |
| while (!ts_initial || (num_pkts-- > 0)) { |
| rc = LMS_RecvStream(&m_lms_stream_rx[0], &buffer[0], len, &rx_metadata, 100); |
| LOGC(DDEV, DEBUG) << "Flush: Recv buffer of len " << rc << " at " << std::hex << rx_metadata.timestamp; |
| if (rc != len) { |
| LOGC(DDEV, ALERT) << "LMS: Device receive timed out"; |
| delete[] buffer; |
| return false; |
| } |
| |
| ts_initial = rx_metadata.timestamp + len; |
| } |
| |
| LOGC(DDEV, INFO) << "Initial timestamp " << ts_initial << std::endl; |
| delete[] buffer; |
| return true; |
| } |
| |
| bool LMSDevice::setRxAntenna(const std::string & ant, size_t chan) |
| { |
| int idx; |
| |
| if (chan >= rx_paths.size()) { |
| LOGC(DDEV, ALERT) << "Requested non-existent channel " << chan; |
| return false; |
| } |
| |
| idx = get_ant_idx(ant, LMS_CH_RX, chan); |
| if (idx < 0) { |
| LOGC(DDEV, ALERT) << "Invalid Rx Antenna"; |
| return false; |
| } |
| |
| if (LMS_SetAntenna(m_lms_dev, LMS_CH_RX, chan, idx) < 0) { |
| LOGC(DDEV, ALERT) << "Unable to set Rx Antenna"; |
| } |
| |
| return true; |
| } |
| |
| std::string LMSDevice::getRxAntenna(size_t chan) |
| { |
| lms_name_t name_list[MAX_ANTENNA_LIST_SIZE]; /* large enough list for antenna names. */ |
| int idx; |
| |
| if (chan >= rx_paths.size()) { |
| LOGC(DDEV, ALERT) << "Requested non-existent channel " << chan; |
| return ""; |
| } |
| |
| idx = LMS_GetAntenna(m_lms_dev, LMS_CH_RX, chan); |
| if (idx < 0) { |
| LOGC(DDEV, ALERT) << "Error getting Rx Antenna"; |
| return ""; |
| } |
| |
| if (LMS_GetAntennaList(m_lms_dev, LMS_CH_RX, chan, name_list) < idx) { |
| LOGC(DDEV, ALERT) << "Error getting Rx Antenna List"; |
| return ""; |
| } |
| |
| return name_list[idx]; |
| } |
| |
| bool LMSDevice::setTxAntenna(const std::string & ant, size_t chan) |
| { |
| int idx; |
| |
| if (chan >= tx_paths.size()) { |
| LOGC(DDEV, ALERT) << "Requested non-existent channel " << chan; |
| return false; |
| } |
| |
| idx = get_ant_idx(ant, LMS_CH_TX, chan); |
| if (idx < 0) { |
| LOGC(DDEV, ALERT) << "Invalid Rx Antenna"; |
| return false; |
| } |
| |
| if (LMS_SetAntenna(m_lms_dev, LMS_CH_TX, chan, idx) < 0) { |
| LOGC(DDEV, ALERT) << "Unable to set Rx Antenna"; |
| } |
| |
| return true; |
| } |
| |
| std::string LMSDevice::getTxAntenna(size_t chan) |
| { |
| lms_name_t name_list[MAX_ANTENNA_LIST_SIZE]; /* large enough list for antenna names. */ |
| int idx; |
| |
| if (chan >= tx_paths.size()) { |
| LOGC(DDEV, ALERT) << "Requested non-existent channel " << chan; |
| return ""; |
| } |
| |
| idx = LMS_GetAntenna(m_lms_dev, LMS_CH_TX, chan); |
| if (idx < 0) { |
| LOGC(DDEV, ALERT) << "Error getting Tx Antenna"; |
| return ""; |
| } |
| |
| if (LMS_GetAntennaList(m_lms_dev, LMS_CH_TX, chan, name_list) < idx) { |
| LOGC(DDEV, ALERT) << "Error getting Tx Antenna List"; |
| return ""; |
| } |
| |
| return name_list[idx]; |
| } |
| |
| bool LMSDevice::requiresRadioAlign() |
| { |
| return false; |
| } |
| |
| GSM::Time LMSDevice::minLatency() { |
| /* Empirical data from a handful of |
| relatively recent machines shows that the B100 will underrun when |
| the transmit threshold is reduced to a time of 6 and a half frames, |
| so we set a minimum 7 frame threshold. */ |
| return GSM::Time(6,7); |
| } |
| |
| // NOTE: Assumes sequential reads |
| int LMSDevice::readSamples(std::vector < short *>&bufs, int len, bool * overrun, |
| TIMESTAMP timestamp, bool * underrun, unsigned *RSSI) |
| { |
| int rc = 0; |
| unsigned int i; |
| lms_stream_status_t status; |
| lms_stream_meta_t rx_metadata = {}; |
| rx_metadata.flushPartialPacket = false; |
| rx_metadata.waitForTimestamp = false; |
| rx_metadata.timestamp = 0; |
| |
| if (bufs.size() != chans) { |
| LOGC(DDEV, ALERT) << "Invalid channel combination " << bufs.size(); |
| return -1; |
| } |
| |
| *overrun = false; |
| *underrun = false; |
| for (i = 0; i<chans; i++) { |
| thread_enable_cancel(false); |
| rc = LMS_RecvStream(&m_lms_stream_rx[i], bufs[i], len, &rx_metadata, 100); |
| if (rc != len) { |
| LOGC(DDEV, ALERT) << "LMS: Device receive timed out (" << rc << " vs exp " << len << ")."; |
| thread_enable_cancel(true); |
| return -1; |
| } |
| if (timestamp != (TIMESTAMP)rx_metadata.timestamp) |
| LOGC(DDEV, ALERT) << "chan "<< i << " recv buffer of len " << rc << " expect " << std::hex << timestamp << " got " << std::hex << (TIMESTAMP)rx_metadata.timestamp << " (" << std::hex << rx_metadata.timestamp <<") diff=" << rx_metadata.timestamp - timestamp; |
| |
| if (LMS_GetStreamStatus(&m_lms_stream_rx[i], &status) == 0) { |
| if (status.underrun > m_last_rx_underruns[i]) |
| *underrun = true; |
| m_last_rx_underruns[i] = status.underrun; |
| |
| if (status.overrun > m_last_rx_overruns[i]) |
| *overrun = true; |
| m_last_rx_overruns[i] = status.overrun; |
| } |
| thread_enable_cancel(true); |
| } |
| |
| samplesRead += rc; |
| |
| if (((TIMESTAMP) rx_metadata.timestamp) < timestamp) |
| rc = 0; |
| |
| return rc; |
| } |
| |
| int LMSDevice::writeSamples(std::vector < short *>&bufs, int len, |
| bool * underrun, unsigned long long timestamp, |
| bool isControl) |
| { |
| int rc = 0; |
| unsigned int i; |
| lms_stream_status_t status; |
| lms_stream_meta_t tx_metadata = {}; |
| tx_metadata.flushPartialPacket = false; |
| tx_metadata.waitForTimestamp = true; |
| tx_metadata.timestamp = timestamp - ts_offset; /* Shift Tx time by offset */ |
| |
| if (isControl) { |
| LOGC(DDEV, ERR) << "Control packets not supported"; |
| return 0; |
| } |
| |
| if (bufs.size() != chans) { |
| LOGC(DDEV, ALERT) << "Invalid channel combination " << bufs.size(); |
| return -1; |
| } |
| |
| *underrun = false; |
| |
| for (i = 0; i<chans; i++) { |
| LOGC(DDEV, DEBUG) << "chan "<< i << " send buffer of len " << len << " timestamp " << std::hex << tx_metadata.timestamp; |
| thread_enable_cancel(false); |
| rc = LMS_SendStream(&m_lms_stream_tx[i], bufs[i], len, &tx_metadata, 100); |
| if (rc != len) { |
| LOGC(DDEV, ALERT) << "LMS: Device send timed out"; |
| } |
| |
| if (LMS_GetStreamStatus(&m_lms_stream_tx[i], &status) == 0) { |
| if (status.underrun > m_last_tx_underruns[i]) |
| *underrun = true; |
| m_last_tx_underruns[i] = status.underrun; |
| } |
| thread_enable_cancel(true); |
| } |
| |
| samplesWritten += rc; |
| |
| return rc; |
| } |
| |
| bool LMSDevice::updateAlignment(TIMESTAMP timestamp) |
| { |
| return true; |
| } |
| |
| bool LMSDevice::setTxFreq(double wFreq, size_t chan) |
| { |
| if (LMS_SetLOFrequency(m_lms_dev, LMS_CH_TX, chan, wFreq) < 0) { |
| LOGC(DDEV, ALERT) << "set Tx: " << wFreq << " failed!"; |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool LMSDevice::setRxFreq(double wFreq, size_t chan) |
| { |
| if (LMS_SetLOFrequency(m_lms_dev, LMS_CH_RX, chan, wFreq) < 0) { |
| LOGC(DDEV, ALERT) << "set Rx: " << wFreq << " failed!"; |
| return false; |
| } |
| |
| return true; |
| } |
| |
| RadioDevice *RadioDevice::make(size_t tx_sps, size_t rx_sps, |
| InterfaceType iface, size_t chans, double lo_offset, |
| const std::vector < std::string > &tx_paths, |
| const std::vector < std::string > &rx_paths) |
| { |
| if (tx_sps != rx_sps) { |
| LOGC(DDEV, ERROR) << "LMS Requires tx_sps == rx_sps"; |
| return NULL; |
| } |
| if (lo_offset != 0.0) { |
| LOGC(DDEV, ERROR) << "LMS doesn't support lo_offset"; |
| return NULL; |
| } |
| return new LMSDevice(tx_sps, rx_sps, iface, chans, lo_offset, tx_paths, rx_paths); |
| } |