| /* |
| * Device support for Ettus Research UHD driver |
| * Written by Thomas Tsou <ttsou@vt.edu> |
| * |
| * Copyright 2010,2011 Free Software Foundation, Inc. |
| * |
| * 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/>. |
| * See the COPYING file in the main directory for details. |
| */ |
| |
| #include "radioDevice.h" |
| #include "Threads.h" |
| #include "Logger.h" |
| #include <uhd/version.hpp> |
| #include <uhd/property_tree.hpp> |
| #include <uhd/usrp/multi_usrp.hpp> |
| #include <uhd/utils/thread_priority.hpp> |
| #include <uhd/utils/msg.hpp> |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #define B2XX_CLK_RT 52e6 |
| #define B2XX_BASE_RT GSMRATE |
| #define B100_BASE_RT 400000 |
| #define USRP2_BASE_RT 390625 |
| #define TX_AMPL 0.3 |
| #define SAMPLE_BUF_SZ (1 << 20) |
| |
| enum uhd_dev_type { |
| USRP1, |
| USRP2, |
| B100, |
| B2XX, |
| UMTRX, |
| NUM_USRP_TYPES, |
| }; |
| |
| struct uhd_dev_offset { |
| enum uhd_dev_type type; |
| int sps; |
| double offset; |
| }; |
| |
| /* |
| * Tx / Rx sample offset values. In a perfect world, there is no group delay |
| * though analog components, and behaviour through digital filters exactly |
| * matches calculated values. In reality, there are unaccounted factors, |
| * which are captured in these empirically measured (using a loopback test) |
| * timing correction values. |
| * |
| * Notes: |
| * USRP1 with timestamps is not supported by UHD. |
| */ |
| static struct uhd_dev_offset uhd_offsets[NUM_USRP_TYPES * 2] = { |
| { USRP1, 1, 0.0 }, |
| { USRP1, 4, 0.0 }, |
| { USRP2, 1, 1.2184e-4 }, |
| { USRP2, 4, 8.0230e-5 }, |
| { B100, 1, 1.2104e-4 }, |
| { B100, 4, 7.9307e-5 }, |
| { B2XX, 1, 9.9692e-5 }, |
| { B2XX, 4, 6.9248e-5 }, |
| { UMTRX, 1, 9.9692e-5 }, |
| { UMTRX, 4, 7.3846e-5 }, |
| }; |
| |
| static double get_dev_offset(enum uhd_dev_type type, int sps) |
| { |
| if (type == USRP1) { |
| LOG(ERR) << "Invalid device type"; |
| return 0.0; |
| } |
| |
| switch (sps) { |
| case 1: |
| return uhd_offsets[2 * type + 0].offset; |
| case 4: |
| return uhd_offsets[2 * type + 1].offset; |
| } |
| |
| LOG(ERR) << "Unsupported samples-per-symbols: " << sps; |
| return 0.0; |
| } |
| |
| /* |
| * Select sample rate based on device type and requested samples-per-symbol. |
| * The base rate is either GSM symbol rate, 270.833 kHz, or the minimum |
| * usable channel spacing of 400 kHz. |
| */ |
| static double select_rate(uhd_dev_type type, int sps) |
| { |
| if ((sps != 4) && (sps != 1)) |
| return -9999.99; |
| |
| switch (type) { |
| case USRP2: |
| return USRP2_BASE_RT * sps; |
| case B100: |
| return B100_BASE_RT * sps; |
| case B2XX: |
| case UMTRX: |
| return GSMRATE * sps; |
| default: |
| break; |
| } |
| |
| LOG(ALERT) << "Unknown device type " << type; |
| return -9999.99; |
| } |
| |
| /** Timestamp conversion |
| @param timestamp a UHD or OpenBTS timestamp |
| @param rate sample rate |
| @return the converted timestamp |
| */ |
| uhd::time_spec_t convert_time(TIMESTAMP ticks, double rate) |
| { |
| double secs = (double) ticks / rate; |
| return uhd::time_spec_t(secs); |
| } |
| |
| TIMESTAMP convert_time(uhd::time_spec_t ts, double rate) |
| { |
| TIMESTAMP ticks = ts.get_full_secs() * rate; |
| return ts.get_tick_count(rate) + ticks; |
| } |
| |
| /* |
| Sample Buffer - Allows reading and writing of timed samples using OpenBTS |
| or UHD style timestamps. Time conversions are handled |
| internally or accessable through the static convert calls. |
| */ |
| class smpl_buf { |
| public: |
| /** Sample buffer constructor |
| @param len number of 32-bit samples the buffer should hold |
| @param rate sample clockrate |
| @param timestamp |
| */ |
| smpl_buf(size_t len, double rate); |
| ~smpl_buf(); |
| |
| /** Query number of samples available for reading |
| @param timestamp time of first sample |
| @return number of available samples or error |
| */ |
| ssize_t avail_smpls(TIMESTAMP timestamp) const; |
| ssize_t avail_smpls(uhd::time_spec_t timestamp) const; |
| |
| /** Read and write |
| @param buf pointer to buffer |
| @param len number of samples desired to read or write |
| @param timestamp time of first stample |
| @return number of actual samples read or written or error |
| */ |
| ssize_t read(void *buf, size_t len, TIMESTAMP timestamp); |
| ssize_t read(void *buf, size_t len, uhd::time_spec_t timestamp); |
| ssize_t write(void *buf, size_t len, TIMESTAMP timestamp); |
| ssize_t write(void *buf, size_t len, uhd::time_spec_t timestamp); |
| |
| /** Buffer status string |
| @return a formatted string describing internal buffer state |
| */ |
| std::string str_status() const; |
| |
| /** Formatted error string |
| @param code an error code |
| @return a formatted error string |
| */ |
| static std::string str_code(ssize_t code); |
| |
| enum err_code { |
| ERROR_TIMESTAMP = -1, |
| ERROR_READ = -2, |
| ERROR_WRITE = -3, |
| ERROR_OVERFLOW = -4 |
| }; |
| |
| private: |
| uint32_t *data; |
| size_t buf_len; |
| |
| double clk_rt; |
| |
| TIMESTAMP time_start; |
| TIMESTAMP time_end; |
| |
| size_t data_start; |
| size_t data_end; |
| }; |
| |
| /* |
| uhd_device - UHD implementation of the Device interface. Timestamped samples |
| are sent to and received from the device. An intermediate buffer |
| on the receive side collects and aligns packets of samples. |
| Events and errors such as underruns are reported asynchronously |
| by the device and received in a separate thread. |
| */ |
| class uhd_device : public RadioDevice { |
| public: |
| uhd_device(int sps, bool skip_rx); |
| ~uhd_device(); |
| |
| int open(const std::string &args); |
| bool start(); |
| bool stop(); |
| void restart(uhd::time_spec_t ts); |
| void setPriority(); |
| enum TxWindowType getWindowType() { return tx_window; } |
| |
| int readSamples(short *buf, int len, bool *overrun, |
| TIMESTAMP timestamp, bool *underrun, unsigned *RSSI); |
| |
| int writeSamples(short *buf, int len, bool *underrun, |
| TIMESTAMP timestamp, bool isControl); |
| |
| bool updateAlignment(TIMESTAMP timestamp); |
| |
| bool setTxFreq(double wFreq); |
| bool setRxFreq(double wFreq); |
| |
| inline TIMESTAMP initialWriteTimestamp() { return 0; } |
| inline TIMESTAMP initialReadTimestamp() { return 0; } |
| |
| inline double fullScaleInputValue() { return 32000 * TX_AMPL; } |
| inline double fullScaleOutputValue() { return 32000; } |
| |
| double setRxGain(double db); |
| double getRxGain(void) { return rx_gain; } |
| double maxRxGain(void) { return rx_gain_max; } |
| double minRxGain(void) { return rx_gain_min; } |
| |
| double setTxGain(double db); |
| double maxTxGain(void) { return tx_gain_max; } |
| double minTxGain(void) { return tx_gain_min; } |
| |
| double getTxFreq() { return tx_freq; } |
| double getRxFreq() { return rx_freq; } |
| |
| inline double getSampleRate() { return tx_rate; } |
| inline double numberRead() { return rx_pkt_cnt; } |
| inline double numberWritten() { return 0; } |
| |
| /** Receive and process asynchronous message |
| @return true if message received or false on timeout or error |
| */ |
| bool recv_async_msg(); |
| |
| enum err_code { |
| ERROR_TIMING = -1, |
| ERROR_UNRECOVERABLE = -2, |
| ERROR_UNHANDLED = -3, |
| }; |
| |
| private: |
| uhd::usrp::multi_usrp::sptr usrp_dev; |
| uhd::tx_streamer::sptr tx_stream; |
| uhd::rx_streamer::sptr rx_stream; |
| enum TxWindowType tx_window; |
| enum uhd_dev_type dev_type; |
| |
| int sps; |
| double tx_rate, rx_rate; |
| |
| double tx_gain, tx_gain_min, tx_gain_max; |
| double rx_gain, rx_gain_min, rx_gain_max; |
| |
| double tx_freq, rx_freq; |
| size_t tx_spp, rx_spp; |
| |
| bool started; |
| bool aligned; |
| bool skip_rx; |
| |
| size_t rx_pkt_cnt; |
| size_t drop_cnt; |
| uhd::time_spec_t prev_ts; |
| |
| TIMESTAMP ts_offset; |
| smpl_buf *rx_smpl_buf; |
| |
| void init_gains(); |
| void set_ref_clk(bool ext_clk); |
| int set_master_clk(double rate); |
| int set_rates(double tx_rate, double rx_rate); |
| bool parse_dev_type(); |
| bool flush_recv(size_t num_pkts); |
| int check_rx_md_err(uhd::rx_metadata_t &md, ssize_t num_smpls); |
| |
| std::string str_code(uhd::rx_metadata_t metadata); |
| std::string str_code(uhd::async_metadata_t metadata); |
| |
| Thread async_event_thrd; |
| }; |
| |
| void *async_event_loop(uhd_device *dev) |
| { |
| while (1) { |
| dev->recv_async_msg(); |
| pthread_testcancel(); |
| } |
| } |
| |
| /* |
| Catch and drop underrun 'U' and overrun 'O' messages from stdout |
| since we already report using the logging facility. Direct |
| everything else appropriately. |
| */ |
| void uhd_msg_handler(uhd::msg::type_t type, const std::string &msg) |
| { |
| switch (type) { |
| case uhd::msg::status: |
| LOG(INFO) << msg; |
| break; |
| case uhd::msg::warning: |
| LOG(WARNING) << msg; |
| break; |
| case uhd::msg::error: |
| LOG(ERR) << msg; |
| break; |
| case uhd::msg::fastpath: |
| break; |
| } |
| } |
| |
| uhd_device::uhd_device(int sps, bool skip_rx) |
| : tx_gain(0.0), tx_gain_min(0.0), tx_gain_max(0.0), |
| rx_gain(0.0), rx_gain_min(0.0), rx_gain_max(0.0), |
| tx_freq(0.0), rx_freq(0.0), tx_spp(0), rx_spp(0), |
| started(false), aligned(false), rx_pkt_cnt(0), drop_cnt(0), |
| prev_ts(0,0), ts_offset(0), rx_smpl_buf(NULL) |
| { |
| this->sps = sps; |
| this->skip_rx = skip_rx; |
| } |
| |
| uhd_device::~uhd_device() |
| { |
| stop(); |
| |
| if (rx_smpl_buf) |
| delete rx_smpl_buf; |
| } |
| |
| void uhd_device::init_gains() |
| { |
| uhd::gain_range_t range; |
| |
| range = usrp_dev->get_tx_gain_range(); |
| tx_gain_min = range.start(); |
| tx_gain_max = range.stop(); |
| |
| range = usrp_dev->get_rx_gain_range(); |
| rx_gain_min = range.start(); |
| rx_gain_max = range.stop(); |
| |
| usrp_dev->set_tx_gain((tx_gain_min + tx_gain_max) / 2); |
| usrp_dev->set_rx_gain((rx_gain_min + rx_gain_max) / 2); |
| |
| tx_gain = usrp_dev->get_tx_gain(); |
| rx_gain = usrp_dev->get_rx_gain(); |
| |
| return; |
| } |
| |
| void uhd_device::set_ref_clk(bool ext_clk) |
| { |
| if (ext_clk) |
| usrp_dev->set_clock_source("external"); |
| |
| return; |
| } |
| |
| int uhd_device::set_master_clk(double clk_rate) |
| { |
| double actual, offset, limit = 1.0; |
| |
| try { |
| usrp_dev->set_master_clock_rate(clk_rate); |
| } catch (const std::exception &ex) { |
| LOG(ALERT) << "UHD clock rate setting failed: " << clk_rate; |
| LOG(ALERT) << ex.what(); |
| return -1; |
| } |
| |
| actual = usrp_dev->get_master_clock_rate(); |
| offset = fabs(clk_rate - actual); |
| |
| if (offset > limit) { |
| LOG(ALERT) << "Failed to set master clock rate"; |
| LOG(ALERT) << "Requested clock rate " << clk_rate; |
| LOG(ALERT) << "Actual clock rate " << actual; |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| int uhd_device::set_rates(double tx_rate, double rx_rate) |
| { |
| double offset_limit = 1.0; |
| double tx_offset, rx_offset; |
| |
| // B2XX is the only device where we set FPGA clocking |
| if (dev_type == B2XX) { |
| if (set_master_clk(B2XX_CLK_RT) < 0) |
| return -1; |
| } |
| |
| // Set sample rates |
| try { |
| usrp_dev->set_tx_rate(tx_rate); |
| usrp_dev->set_rx_rate(rx_rate); |
| } catch (const std::exception &ex) { |
| LOG(ALERT) << "UHD rate setting failed"; |
| LOG(ALERT) << ex.what(); |
| return -1; |
| } |
| this->tx_rate = usrp_dev->get_tx_rate(); |
| this->rx_rate = usrp_dev->get_rx_rate(); |
| |
| tx_offset = fabs(this->tx_rate - tx_rate); |
| rx_offset = fabs(this->rx_rate - rx_rate); |
| if ((tx_offset > offset_limit) || (rx_offset > offset_limit)) { |
| LOG(ALERT) << "Actual sample rate differs from desired rate"; |
| LOG(ALERT) << "Tx/Rx (" << this->tx_rate << "/" |
| << this->rx_rate << ")"; |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| double uhd_device::setTxGain(double db) |
| { |
| usrp_dev->set_tx_gain(db); |
| tx_gain = usrp_dev->get_tx_gain(); |
| |
| LOG(INFO) << "Set TX gain to " << tx_gain << "dB"; |
| |
| return tx_gain; |
| } |
| |
| double uhd_device::setRxGain(double db) |
| { |
| usrp_dev->set_rx_gain(db); |
| rx_gain = usrp_dev->get_rx_gain(); |
| |
| LOG(INFO) << "Set RX gain to " << rx_gain << "dB"; |
| |
| return rx_gain; |
| } |
| |
| /* |
| Parse the UHD device tree and mboard name to find out what device we're |
| dealing with. We need the window type so that the transceiver knows how to |
| deal with the transport latency. Reject the USRP1 because UHD doesn't |
| support timestamped samples with it. |
| */ |
| bool uhd_device::parse_dev_type() |
| { |
| std::string mboard_str, dev_str; |
| uhd::property_tree::sptr prop_tree; |
| size_t usrp1_str, usrp2_str, b100_str, b200_str, b210_str, umtrx_str; |
| |
| prop_tree = usrp_dev->get_device()->get_tree(); |
| dev_str = prop_tree->access<std::string>("/name").get(); |
| mboard_str = usrp_dev->get_mboard_name(); |
| |
| usrp1_str = dev_str.find("USRP1"); |
| usrp2_str = dev_str.find("USRP2"); |
| b100_str = mboard_str.find("B100"); |
| b200_str = mboard_str.find("B200"); |
| b210_str = mboard_str.find("B210"); |
| umtrx_str = dev_str.find("UmTRX"); |
| |
| if (usrp1_str != std::string::npos) { |
| LOG(ALERT) << "USRP1 is not supported using the UHD driver"; |
| LOG(ALERT) << "Please compile with GNU Radio libusrp support"; |
| dev_type = USRP1; |
| return false; |
| } |
| |
| if (b100_str != std::string::npos) { |
| tx_window = TX_WINDOW_USRP1; |
| LOG(INFO) << "Using USRP1 type transmit window for " |
| << dev_str << " " << mboard_str; |
| dev_type = B100; |
| return true; |
| } else if (b200_str != std::string::npos) { |
| dev_type = B2XX; |
| } else if (b210_str != std::string::npos) { |
| dev_type = B2XX; |
| } else if (usrp2_str != std::string::npos) { |
| dev_type = USRP2; |
| } else if (umtrx_str != std::string::npos) { |
| dev_type = UMTRX; |
| } else { |
| LOG(ALERT) << "Unknown UHD device type " << dev_str; |
| return false; |
| } |
| |
| tx_window = TX_WINDOW_FIXED; |
| LOG(INFO) << "Using fixed transmit window for " |
| << dev_str << " " << mboard_str; |
| return true; |
| } |
| |
| int uhd_device::open(const std::string &args) |
| { |
| // Register msg handler |
| uhd::msg::register_handler(&uhd_msg_handler); |
| |
| // Find UHD devices |
| uhd::device_addr_t addr(args); |
| uhd::device_addrs_t dev_addrs = uhd::device::find(addr); |
| if (dev_addrs.size() == 0) { |
| LOG(ALERT) << "No UHD devices found with address '" << args << "'"; |
| return -1; |
| } |
| |
| // Use the first found device |
| LOG(INFO) << "Using discovered UHD device " << dev_addrs[0].to_string(); |
| try { |
| usrp_dev = uhd::usrp::multi_usrp::make(dev_addrs[0]); |
| } catch(...) { |
| LOG(ALERT) << "UHD make failed, device " << dev_addrs[0].to_string(); |
| return -1; |
| } |
| |
| // Check for a valid device type and set bus type |
| if (!parse_dev_type()) |
| return -1; |
| |
| #ifdef EXTREF |
| set_ref_clk(true); |
| #endif |
| // Create TX and RX streamers |
| uhd::stream_args_t stream_args("sc16"); |
| tx_stream = usrp_dev->get_tx_stream(stream_args); |
| rx_stream = usrp_dev->get_rx_stream(stream_args); |
| |
| // Number of samples per over-the-wire packet |
| tx_spp = tx_stream->get_max_num_samps(); |
| rx_spp = rx_stream->get_max_num_samps(); |
| |
| // Set rates |
| double _tx_rate = select_rate(dev_type, sps); |
| double _rx_rate = _tx_rate / sps; |
| if ((_tx_rate > 0.0) && (set_rates(_tx_rate, _rx_rate) < 0)) |
| return -1; |
| |
| // Create receive buffer |
| size_t buf_len = SAMPLE_BUF_SZ / sizeof(uint32_t); |
| rx_smpl_buf = new smpl_buf(buf_len, rx_rate); |
| |
| // Set receive chain sample offset |
| double offset = get_dev_offset(dev_type, sps); |
| if (offset == 0.0) { |
| LOG(ERR) << "Unsupported configuration, no correction applied"; |
| ts_offset = 0; |
| } else { |
| ts_offset = (TIMESTAMP) (offset * rx_rate); |
| } |
| |
| // Initialize and shadow gain values |
| init_gains(); |
| |
| // Print configuration |
| LOG(INFO) << "\n" << usrp_dev->get_pp_string(); |
| |
| switch (dev_type) { |
| case B100: |
| return RESAMP_64M; |
| case USRP2: |
| return RESAMP_100M; |
| } |
| |
| return NORMAL; |
| } |
| |
| bool uhd_device::flush_recv(size_t num_pkts) |
| { |
| uhd::rx_metadata_t md; |
| size_t num_smpls; |
| uint32_t buff[rx_spp]; |
| float timeout; |
| |
| // Use .01 sec instead of the default .1 sec |
| timeout = .01; |
| |
| for (size_t i = 0; i < num_pkts; i++) { |
| num_smpls = rx_stream->recv(buff, rx_spp, md, |
| timeout, true); |
| if (!num_smpls) { |
| switch (md.error_code) { |
| case uhd::rx_metadata_t::ERROR_CODE_TIMEOUT: |
| return true; |
| default: |
| continue; |
| } |
| } |
| } |
| |
| return true; |
| } |
| |
| void uhd_device::restart(uhd::time_spec_t ts) |
| { |
| uhd::stream_cmd_t cmd = uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS; |
| usrp_dev->issue_stream_cmd(cmd); |
| |
| flush_recv(50); |
| |
| usrp_dev->set_time_now(ts); |
| aligned = false; |
| |
| cmd = uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS; |
| cmd.stream_now = true; |
| usrp_dev->issue_stream_cmd(cmd); |
| } |
| |
| bool uhd_device::start() |
| { |
| LOG(INFO) << "Starting USRP..."; |
| |
| if (started) { |
| LOG(ERR) << "Device already started"; |
| return false; |
| } |
| |
| setPriority(); |
| |
| // Start asynchronous event (underrun check) loop |
| async_event_thrd.start((void * (*)(void*))async_event_loop, (void*)this); |
| |
| // Start streaming |
| restart(uhd::time_spec_t(0.0)); |
| |
| // Display usrp time |
| double time_now = usrp_dev->get_time_now().get_real_secs(); |
| LOG(INFO) << "The current time is " << time_now << " seconds"; |
| |
| started = true; |
| return true; |
| } |
| |
| bool uhd_device::stop() |
| { |
| uhd::stream_cmd_t stream_cmd = |
| uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS; |
| |
| usrp_dev->issue_stream_cmd(stream_cmd); |
| |
| started = false; |
| return true; |
| } |
| |
| void uhd_device::setPriority() |
| { |
| uhd::set_thread_priority_safe(); |
| return; |
| } |
| |
| int uhd_device::check_rx_md_err(uhd::rx_metadata_t &md, ssize_t num_smpls) |
| { |
| uhd::time_spec_t ts; |
| |
| if (!num_smpls) { |
| LOG(ERR) << str_code(md); |
| |
| switch (md.error_code) { |
| case uhd::rx_metadata_t::ERROR_CODE_TIMEOUT: |
| LOG(ALERT) << "UHD: Receive timed out"; |
| return ERROR_UNRECOVERABLE; |
| case uhd::rx_metadata_t::ERROR_CODE_OVERFLOW: |
| case uhd::rx_metadata_t::ERROR_CODE_LATE_COMMAND: |
| case uhd::rx_metadata_t::ERROR_CODE_BROKEN_CHAIN: |
| case uhd::rx_metadata_t::ERROR_CODE_BAD_PACKET: |
| default: |
| return ERROR_UNHANDLED; |
| } |
| } |
| |
| // Missing timestamp |
| if (!md.has_time_spec) { |
| LOG(ALERT) << "UHD: Received packet missing timestamp"; |
| return ERROR_UNRECOVERABLE; |
| } |
| |
| ts = md.time_spec; |
| |
| // Monotonicity check |
| if (ts < prev_ts) { |
| LOG(ALERT) << "UHD: Loss of monotonic time"; |
| LOG(ALERT) << "Current time: " << ts.get_real_secs() << ", " |
| << "Previous time: " << prev_ts.get_real_secs(); |
| return ERROR_TIMING; |
| } else { |
| prev_ts = ts; |
| } |
| |
| return 0; |
| } |
| |
| int uhd_device::readSamples(short *buf, int len, bool *overrun, |
| TIMESTAMP timestamp, bool *underrun, unsigned *RSSI) |
| { |
| ssize_t rc; |
| uhd::time_spec_t ts; |
| uhd::rx_metadata_t metadata; |
| uint32_t pkt_buf[rx_spp]; |
| |
| if (skip_rx) |
| return 0; |
| |
| // Shift read time with respect to transmit clock |
| timestamp += ts_offset; |
| |
| ts = convert_time(timestamp, rx_rate); |
| LOG(DEBUG) << "Requested timestamp = " << ts.get_real_secs(); |
| |
| // Check that timestamp is valid |
| rc = rx_smpl_buf->avail_smpls(timestamp); |
| if (rc < 0) { |
| LOG(ERR) << rx_smpl_buf->str_code(rc); |
| LOG(ERR) << rx_smpl_buf->str_status(); |
| return 0; |
| } |
| |
| // Receive samples from the usrp until we have enough |
| while (rx_smpl_buf->avail_smpls(timestamp) < len) { |
| size_t num_smpls = rx_stream->recv( |
| (void*)pkt_buf, |
| rx_spp, |
| metadata, |
| 0.1, |
| true); |
| rx_pkt_cnt++; |
| |
| // Check for errors |
| rc = check_rx_md_err(metadata, num_smpls); |
| switch (rc) { |
| case ERROR_UNRECOVERABLE: |
| LOG(ALERT) << "UHD: Version " << uhd::get_version_string(); |
| LOG(ALERT) << "UHD: Unrecoverable error, exiting..."; |
| exit(-1); |
| case ERROR_TIMING: |
| restart(prev_ts); |
| case ERROR_UNHANDLED: |
| continue; |
| } |
| |
| |
| ts = metadata.time_spec; |
| LOG(DEBUG) << "Received timestamp = " << ts.get_real_secs(); |
| |
| rc = rx_smpl_buf->write(pkt_buf, |
| num_smpls, |
| metadata.time_spec); |
| |
| // Continue on local overrun, exit on other errors |
| if ((rc < 0)) { |
| LOG(ERR) << rx_smpl_buf->str_code(rc); |
| LOG(ERR) << rx_smpl_buf->str_status(); |
| if (rc != smpl_buf::ERROR_OVERFLOW) |
| return 0; |
| } |
| } |
| |
| // We have enough samples |
| rc = rx_smpl_buf->read(buf, len, timestamp); |
| if ((rc < 0) || (rc != len)) { |
| LOG(ERR) << rx_smpl_buf->str_code(rc); |
| LOG(ERR) << rx_smpl_buf->str_status(); |
| return 0; |
| } |
| |
| return len; |
| } |
| |
| int uhd_device::writeSamples(short *buf, int len, bool *underrun, |
| unsigned long long timestamp,bool isControl) |
| { |
| uhd::tx_metadata_t metadata; |
| metadata.has_time_spec = true; |
| metadata.start_of_burst = false; |
| metadata.end_of_burst = false; |
| metadata.time_spec = convert_time(timestamp, tx_rate); |
| |
| // No control packets |
| if (isControl) { |
| LOG(ERR) << "Control packets not supported"; |
| return 0; |
| } |
| |
| // Drop a fixed number of packets (magic value) |
| if (!aligned) { |
| drop_cnt++; |
| |
| if (drop_cnt == 1) { |
| LOG(DEBUG) << "Aligning transmitter: stop burst"; |
| *underrun = true; |
| metadata.end_of_burst = true; |
| } else if (drop_cnt < 30) { |
| LOG(DEBUG) << "Aligning transmitter: packet advance"; |
| return len; |
| } else { |
| LOG(DEBUG) << "Aligning transmitter: start burst"; |
| metadata.start_of_burst = true; |
| aligned = true; |
| drop_cnt = 0; |
| } |
| } |
| |
| size_t num_smpls = tx_stream->send(buf, len, metadata); |
| |
| if (num_smpls != (unsigned) len) { |
| LOG(ALERT) << "UHD: Device send timed out"; |
| LOG(ALERT) << "UHD: Version " << uhd::get_version_string(); |
| LOG(ALERT) << "UHD: Unrecoverable error, exiting..."; |
| exit(-1); |
| } |
| |
| return num_smpls; |
| } |
| |
| bool uhd_device::updateAlignment(TIMESTAMP timestamp) |
| { |
| return true; |
| } |
| |
| bool uhd_device::setTxFreq(double wFreq) |
| { |
| uhd::tune_result_t tr = usrp_dev->set_tx_freq(wFreq); |
| LOG(INFO) << "\n" << tr.to_pp_string(); |
| tx_freq = usrp_dev->get_tx_freq(); |
| |
| return true; |
| } |
| |
| bool uhd_device::setRxFreq(double wFreq) |
| { |
| uhd::tune_result_t tr = usrp_dev->set_rx_freq(wFreq); |
| LOG(INFO) << "\n" << tr.to_pp_string(); |
| rx_freq = usrp_dev->get_rx_freq(); |
| |
| return true; |
| } |
| |
| bool uhd_device::recv_async_msg() |
| { |
| uhd::async_metadata_t md; |
| if (!usrp_dev->get_device()->recv_async_msg(md)) |
| return false; |
| |
| // Assume that any error requires resynchronization |
| if (md.event_code != uhd::async_metadata_t::EVENT_CODE_BURST_ACK) { |
| aligned = false; |
| |
| if ((md.event_code != uhd::async_metadata_t::EVENT_CODE_UNDERFLOW) && |
| (md.event_code != uhd::async_metadata_t::EVENT_CODE_TIME_ERROR)) { |
| LOG(ERR) << str_code(md); |
| } |
| } |
| |
| return true; |
| } |
| |
| std::string uhd_device::str_code(uhd::rx_metadata_t metadata) |
| { |
| std::ostringstream ost("UHD: "); |
| |
| switch (metadata.error_code) { |
| case uhd::rx_metadata_t::ERROR_CODE_NONE: |
| ost << "No error"; |
| break; |
| case uhd::rx_metadata_t::ERROR_CODE_TIMEOUT: |
| ost << "No packet received, implementation timed-out"; |
| break; |
| case uhd::rx_metadata_t::ERROR_CODE_LATE_COMMAND: |
| ost << "A stream command was issued in the past"; |
| break; |
| case uhd::rx_metadata_t::ERROR_CODE_BROKEN_CHAIN: |
| ost << "Expected another stream command"; |
| break; |
| case uhd::rx_metadata_t::ERROR_CODE_OVERFLOW: |
| ost << "An internal receive buffer has filled"; |
| break; |
| case uhd::rx_metadata_t::ERROR_CODE_BAD_PACKET: |
| ost << "The packet could not be parsed"; |
| break; |
| default: |
| ost << "Unknown error " << metadata.error_code; |
| } |
| |
| if (metadata.has_time_spec) |
| ost << " at " << metadata.time_spec.get_real_secs() << " sec."; |
| |
| return ost.str(); |
| } |
| |
| std::string uhd_device::str_code(uhd::async_metadata_t metadata) |
| { |
| std::ostringstream ost("UHD: "); |
| |
| switch (metadata.event_code) { |
| case uhd::async_metadata_t::EVENT_CODE_BURST_ACK: |
| ost << "A packet was successfully transmitted"; |
| break; |
| case uhd::async_metadata_t::EVENT_CODE_UNDERFLOW: |
| ost << "An internal send buffer has emptied"; |
| break; |
| case uhd::async_metadata_t::EVENT_CODE_SEQ_ERROR: |
| ost << "Packet loss between host and device"; |
| break; |
| case uhd::async_metadata_t::EVENT_CODE_TIME_ERROR: |
| ost << "Packet time was too late or too early"; |
| break; |
| case uhd::async_metadata_t::EVENT_CODE_UNDERFLOW_IN_PACKET: |
| ost << "Underflow occurred inside a packet"; |
| break; |
| case uhd::async_metadata_t::EVENT_CODE_SEQ_ERROR_IN_BURST: |
| ost << "Packet loss within a burst"; |
| break; |
| default: |
| ost << "Unknown error " << metadata.event_code; |
| } |
| |
| if (metadata.has_time_spec) |
| ost << " at " << metadata.time_spec.get_real_secs() << " sec."; |
| |
| return ost.str(); |
| } |
| |
| smpl_buf::smpl_buf(size_t len, double rate) |
| : buf_len(len), clk_rt(rate), |
| time_start(0), time_end(0), data_start(0), data_end(0) |
| { |
| data = new uint32_t[len]; |
| } |
| |
| smpl_buf::~smpl_buf() |
| { |
| delete[] data; |
| } |
| |
| ssize_t smpl_buf::avail_smpls(TIMESTAMP timestamp) const |
| { |
| if (timestamp < time_start) |
| return ERROR_TIMESTAMP; |
| else if (timestamp >= time_end) |
| return 0; |
| else |
| return time_end - timestamp; |
| } |
| |
| ssize_t smpl_buf::avail_smpls(uhd::time_spec_t timespec) const |
| { |
| return avail_smpls(convert_time(timespec, clk_rt)); |
| } |
| |
| ssize_t smpl_buf::read(void *buf, size_t len, TIMESTAMP timestamp) |
| { |
| int type_sz = 2 * sizeof(short); |
| |
| // Check for valid read |
| if (timestamp < time_start) |
| return ERROR_TIMESTAMP; |
| if (timestamp >= time_end) |
| return 0; |
| if (len >= buf_len) |
| return ERROR_READ; |
| |
| // How many samples should be copied |
| size_t num_smpls = time_end - timestamp; |
| if (num_smpls > len) |
| num_smpls = len; |
| |
| // Starting index |
| size_t read_start = data_start + (timestamp - time_start); |
| |
| // Read it |
| if (read_start + num_smpls < buf_len) { |
| size_t numBytes = len * type_sz; |
| memcpy(buf, data + read_start, numBytes); |
| } else { |
| size_t first_cp = (buf_len - read_start) * type_sz; |
| size_t second_cp = len * type_sz - first_cp; |
| |
| memcpy(buf, data + read_start, first_cp); |
| memcpy((char*) buf + first_cp, data, second_cp); |
| } |
| |
| data_start = (read_start + len) % buf_len; |
| time_start = timestamp + len; |
| |
| if (time_start > time_end) |
| return ERROR_READ; |
| else |
| return num_smpls; |
| } |
| |
| ssize_t smpl_buf::read(void *buf, size_t len, uhd::time_spec_t ts) |
| { |
| return read(buf, len, convert_time(ts, clk_rt)); |
| } |
| |
| ssize_t smpl_buf::write(void *buf, size_t len, TIMESTAMP timestamp) |
| { |
| int type_sz = 2 * sizeof(short); |
| |
| // Check for valid write |
| if ((len == 0) || (len >= buf_len)) |
| return ERROR_WRITE; |
| if ((timestamp + len) <= time_end) |
| return ERROR_TIMESTAMP; |
| |
| // Starting index |
| size_t write_start = (data_start + (timestamp - time_start)) % buf_len; |
| |
| // Write it |
| if ((write_start + len) < buf_len) { |
| size_t numBytes = len * type_sz; |
| memcpy(data + write_start, buf, numBytes); |
| } else { |
| size_t first_cp = (buf_len - write_start) * type_sz; |
| size_t second_cp = len * type_sz - first_cp; |
| |
| memcpy(data + write_start, buf, first_cp); |
| memcpy(data, (char*) buf + first_cp, second_cp); |
| } |
| |
| data_end = (write_start + len) % buf_len; |
| time_end = timestamp + len; |
| |
| if (((write_start + len) > buf_len) && (data_end > data_start)) |
| return ERROR_OVERFLOW; |
| else if (time_end <= time_start) |
| return ERROR_WRITE; |
| else |
| return len; |
| } |
| |
| ssize_t smpl_buf::write(void *buf, size_t len, uhd::time_spec_t ts) |
| { |
| return write(buf, len, convert_time(ts, clk_rt)); |
| } |
| |
| std::string smpl_buf::str_status() const |
| { |
| std::ostringstream ost("Sample buffer: "); |
| |
| ost << "length = " << buf_len; |
| ost << ", time_start = " << time_start; |
| ost << ", time_end = " << time_end; |
| ost << ", data_start = " << data_start; |
| ost << ", data_end = " << data_end; |
| |
| return ost.str(); |
| } |
| |
| std::string smpl_buf::str_code(ssize_t code) |
| { |
| switch (code) { |
| case ERROR_TIMESTAMP: |
| return "Sample buffer: Requested timestamp is not valid"; |
| case ERROR_READ: |
| return "Sample buffer: Read error"; |
| case ERROR_WRITE: |
| return "Sample buffer: Write error"; |
| case ERROR_OVERFLOW: |
| return "Sample buffer: Overrun"; |
| default: |
| return "Sample buffer: Unknown error"; |
| } |
| } |
| |
| RadioDevice *RadioDevice::make(int sps, bool skip_rx) |
| { |
| return new uhd_device(sps, skip_rx); |
| } |