diff options
Diffstat (limited to 'host/lib/usrp/x300/x300_adc_dac_utils.cpp')
| -rw-r--r-- | host/lib/usrp/x300/x300_adc_dac_utils.cpp | 412 |
1 files changed, 412 insertions, 0 deletions
diff --git a/host/lib/usrp/x300/x300_adc_dac_utils.cpp b/host/lib/usrp/x300/x300_adc_dac_utils.cpp new file mode 100644 index 000000000..2dadea26e --- /dev/null +++ b/host/lib/usrp/x300/x300_adc_dac_utils.cpp @@ -0,0 +1,412 @@ +// +// Copyright 2015 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 "x300_impl.hpp" +#include <boost/date_time/posix_time/posix_time_io.hpp> + +/*********************************************************************** + * DAC: Reset and synchronization operations + **********************************************************************/ + +void x300_impl::synchronize_dacs(const std::vector<radio_perifs_t*>& radios) +{ + if (radios.size() < 2) return; //Nothing to synchronize + + //**PRECONDITION** + //This function assumes that all the VITA times in "radios" are synchronized + //to a common reference. Currently, this function is called in get_tx_stream + //which also has the same precondition. + + //Reinitialize and resync all DACs + for (size_t i = 0; i < radios.size(); i++) { + radios[i]->dac->reset_and_resync(); + } + + //Get a rough estimate of the cumulative command latency + boost::posix_time::ptime t_start = boost::posix_time::microsec_clock::local_time(); + for (size_t i = 0; i < radios.size(); i++) { + radios[i]->ctrl->peek64(RB64_TIME_NOW); //Discard value. We are just timing the call + } + boost::posix_time::time_duration t_elapsed = + boost::posix_time::microsec_clock::local_time() - t_start; + + //Add 100% of headroom + uncertaintly to the command time + boost::uint64_t t_sync_us = (t_elapsed.total_microseconds() * 2) + 13000 /*Scheduler latency*/; + + //Pick radios[0] as the time reference. + uhd::time_spec_t sync_time = + radios[0]->time64->get_time_now() + uhd::time_spec_t(((double)t_sync_us)/1e6); + + //Send the sync command + for (size_t i = 0; i < radios.size(); i++) { + radios[i]->ctrl->set_time(sync_time); + radios[i]->ctrl->poke32(TOREG(SR_DACSYNC), 0x1); //Arm FRAMEP/N sync pulse + radios[i]->ctrl->set_time(uhd::time_spec_t(0.0)); //Clear command time + } + + //Wait and check status + boost::this_thread::sleep(boost::posix_time::microseconds(t_sync_us)); + for (size_t i = 0; i < radios.size(); i++) { + radios[i]->dac->verify_sync(); + } +} + +/*********************************************************************** + * ADC: Self-test operations + **********************************************************************/ + +static void check_adc(uhd::wb_iface::sptr iface, const boost::uint32_t val, const boost::uint32_t i) +{ + boost::uint32_t adc_rb = iface->peek32(RB32_RX); + adc_rb ^= 0xfffc0000; //adapt for I inversion in FPGA + if (val != adc_rb) { + throw uhd::runtime_error( + (boost::format("ADC self-test failed for Radio%d. (Exp=0x%x, Got=0x%x)")%i%val%adc_rb).str()); + } +} + +void x300_impl::self_test_adcs(mboard_members_t& mb, boost::uint32_t ramp_time_ms) { + for (size_t r = 0; r < mboard_members_t::NUM_RADIOS; r++) { + radio_perifs_t &perif = mb.radio_perifs[r]; + + //First test basic patterns + perif.adc->set_test_word("ones", "ones"); check_adc(perif.ctrl, 0xfffcfffc,r); + perif.adc->set_test_word("zeros", "zeros"); check_adc(perif.ctrl, 0x00000000,r); + perif.adc->set_test_word("ones", "zeros"); check_adc(perif.ctrl, 0xfffc0000,r); + perif.adc->set_test_word("zeros", "ones"); check_adc(perif.ctrl, 0x0000fffc,r); + for (size_t k = 0; k < 14; k++) + { + perif.adc->set_test_word("zeros", "custom", 1 << k); + check_adc(perif.ctrl, 1 << (k+2),r); + } + for (size_t k = 0; k < 14; k++) + { + perif.adc->set_test_word("custom", "zeros", 1 << k); + check_adc(perif.ctrl, 1 << (k+18),r); + } + + //Turn on ramp pattern test + perif.adc->set_test_word("ramp", "ramp"); + perif.misc_outs->write(radio_misc_outs_reg::ADC_CHECKER_ENABLED, 0); + perif.misc_outs->write(radio_misc_outs_reg::ADC_CHECKER_ENABLED, 1); + } + boost::this_thread::sleep(boost::posix_time::milliseconds(ramp_time_ms)); + + bool passed = true; + std::string status_str; + for (size_t r = 0; r < mboard_members_t::NUM_RADIOS; r++) { + radio_perifs_t &perif = mb.radio_perifs[r]; + perif.misc_ins->refresh(); + + std::string i_status, q_status; + if (perif.misc_ins->get(radio_misc_ins_reg::ADC_CHECKER1_I_LOCKED)) + if (perif.misc_ins->get(radio_misc_ins_reg::ADC_CHECKER1_I_ERROR)) + i_status = "Bit Errors!"; + else + i_status = "Good"; + else + i_status = "Not Locked!"; + + if (perif.misc_ins->get(radio_misc_ins_reg::ADC_CHECKER1_Q_LOCKED)) + if (perif.misc_ins->get(radio_misc_ins_reg::ADC_CHECKER1_Q_ERROR)) + q_status = "Bit Errors!"; + else + q_status = "Good"; + else + q_status = "Not Locked!"; + + passed = passed && (i_status == "Good") && (q_status == "Good"); + status_str += (boost::format(", ADC%d_I=%s, ADC%d_Q=%s")%r%i_status%r%q_status).str(); + + //Return to normal mode + perif.adc->set_test_word("normal", "normal"); + } + + if (not passed) { + throw uhd::runtime_error( + (boost::format("ADC self-test failed! Ramp checker status: {%s}")%status_str.substr(2)).str()); + } +} + +void x300_impl::extended_adc_test(mboard_members_t& mb, double duration_s) +{ + static const size_t SECS_PER_ITER = 5; + UHD_MSG(status) << boost::format("Running Extended ADC Self-Test (Duration=%.0fs, %ds/iteration)...\n") + % duration_s % SECS_PER_ITER; + + size_t num_iters = static_cast<size_t>(ceil(duration_s/SECS_PER_ITER)); + size_t num_failures = 0; + for (size_t iter = 0; iter < num_iters; iter++) { + //Print date and time + boost::posix_time::time_facet *facet = new boost::posix_time::time_facet("%d-%b-%Y %H:%M:%S"); + std::ostringstream time_strm; + time_strm.imbue(std::locale(std::locale::classic(), facet)); + time_strm << boost::posix_time::second_clock::local_time(); + //Run self-test + UHD_MSG(status) << boost::format("-- [%s] Iteration %06d... ") % time_strm.str() % (iter+1); + try { + self_test_adcs(mb, SECS_PER_ITER*1000); + UHD_MSG(status) << "passed" << std::endl; + } catch(std::exception &e) { + num_failures++; + UHD_MSG(status) << e.what() << std::endl; + } + + } + if (num_failures == 0) { + UHD_MSG(status) << "Extended ADC Self-Test PASSED\n"; + } else { + throw uhd::runtime_error( + (boost::format("Extended ADC Self-Test FAILED!!! (%d/%d failures)\n") % num_failures % num_iters).str()); + } +} + +/*********************************************************************** + * ADC: Self-calibration operations + **********************************************************************/ + +void x300_impl::self_cal_adc_capture_delay(mboard_members_t& mb, const size_t radio_i, bool print_status) +{ + radio_perifs_t& perif = mb.radio_perifs[radio_i]; + if (print_status) UHD_MSG(status) << "Running ADC capture delay self-cal..." << std::flush; + + static const boost::uint32_t NUM_DELAY_STEPS = 32; //The IDELAYE2 element has 32 steps + static const boost::uint32_t NUM_RETRIES = 2; //Retry self-cal if it fails in warmup situations + static const boost::int32_t MIN_WINDOW_LEN = 4; + + boost::int32_t win_start = -1, win_stop = -1; + boost::uint32_t iter = 0; + while (iter++ < NUM_RETRIES) { + for (boost::uint32_t dly_tap = 0; dly_tap < NUM_DELAY_STEPS; dly_tap++) { + //Apply delay + perif.misc_outs->write(radio_misc_outs_reg::ADC_DATA_DLY_VAL, dly_tap); + perif.misc_outs->write(radio_misc_outs_reg::ADC_DATA_DLY_STB, 1); + perif.misc_outs->write(radio_misc_outs_reg::ADC_DATA_DLY_STB, 0); + + boost::uint32_t err_code = 0; + + // -- Test I Channel -- + //Put ADC in ramp test mode. Tie the other channel to all ones. + perif.adc->set_test_word("ramp", "ones"); + //Turn on the pattern checker in the FPGA. It will lock when it sees a zero + //and count deviations from the expected value + perif.misc_outs->write(radio_misc_outs_reg::ADC_CHECKER_ENABLED, 0); + perif.misc_outs->write(radio_misc_outs_reg::ADC_CHECKER_ENABLED, 1); + //10ms @ 200MHz = 2 million samples + boost::this_thread::sleep(boost::posix_time::milliseconds(10)); + if (perif.misc_ins->read(radio_misc_ins_reg::ADC_CHECKER0_I_LOCKED)) { + err_code += perif.misc_ins->get(radio_misc_ins_reg::ADC_CHECKER0_I_ERROR); + } else { + err_code += 100; //Increment error code by 100 to indicate no lock + } + + // -- Test Q Channel -- + //Put ADC in ramp test mode. Tie the other channel to all ones. + perif.adc->set_test_word("ones", "ramp"); + //Turn on the pattern checker in the FPGA. It will lock when it sees a zero + //and count deviations from the expected value + perif.misc_outs->write(radio_misc_outs_reg::ADC_CHECKER_ENABLED, 0); + perif.misc_outs->write(radio_misc_outs_reg::ADC_CHECKER_ENABLED, 1); + //10ms @ 200MHz = 2 million samples + boost::this_thread::sleep(boost::posix_time::milliseconds(10)); + if (perif.misc_ins->read(radio_misc_ins_reg::ADC_CHECKER0_Q_LOCKED)) { + err_code += perif.misc_ins->get(radio_misc_ins_reg::ADC_CHECKER0_Q_ERROR); + } else { + err_code += 100; //Increment error code by 100 to indicate no lock + } + + if (err_code == 0) { + if (win_start == -1) { //This is the first window + win_start = dly_tap; + win_stop = dly_tap; + } else { //We are extending the window + win_stop = dly_tap; + } + } else { + if (win_start != -1) { //A valid window turned invalid + if (win_stop - win_start >= MIN_WINDOW_LEN) { + break; //Valid window found + } else { + win_start = -1; //Reset window + } + } + } + //UHD_MSG(status) << (boost::format("CapTap=%d, Error=%d\n") % dly_tap % err_code); + } + + //Retry the self-cal if it fails + if ((win_start == -1 || (win_stop - win_start) < MIN_WINDOW_LEN) && iter < NUM_RETRIES /*not last iteration*/) { + win_start = -1; + win_stop = -1; + boost::this_thread::sleep(boost::posix_time::milliseconds(2000)); + } else { + break; + } + } + perif.adc->set_test_word("normal", "normal"); + perif.misc_outs->write(radio_misc_outs_reg::ADC_CHECKER_ENABLED, 0); + + if (win_start == -1) { + throw uhd::runtime_error("self_cal_adc_capture_delay: Self calibration failed. Convergence error."); + } + + if (win_stop-win_start < MIN_WINDOW_LEN) { + throw uhd::runtime_error("self_cal_adc_capture_delay: Self calibration failed. Valid window too narrow."); + } + + boost::uint32_t ideal_tap = (win_stop + win_start) / 2; + perif.misc_outs->write(radio_misc_outs_reg::ADC_DATA_DLY_VAL, ideal_tap); + perif.misc_outs->write(radio_misc_outs_reg::ADC_DATA_DLY_STB, 1); + perif.misc_outs->write(radio_misc_outs_reg::ADC_DATA_DLY_STB, 0); + + if (print_status) { + double tap_delay = (1.0e12 / mb.clock->get_master_clock_rate()) / (2*32); //in ps + UHD_MSG(status) << boost::format(" done (Tap=%d, Window=%d, TapDelay=%.3fps, Iter=%d)\n") % ideal_tap % (win_stop-win_start) % tap_delay % iter; + } +} + +double x300_impl::self_cal_adc_xfer_delay(mboard_members_t& mb, bool apply_delay) +{ + UHD_MSG(status) << "Running ADC transfer delay self-cal: " << std::flush; + + //Effective resolution of the self-cal. + static const size_t NUM_DELAY_STEPS = 100; + + double master_clk_period = (1.0e9 / mb.clock->get_master_clock_rate()); //in ns + double delay_start = 0.0; + double delay_range = 2 * master_clk_period; + double delay_incr = delay_range / NUM_DELAY_STEPS; + + UHD_MSG(status) << "Measuring..." << std::flush; + double cached_clk_delay = mb.clock->get_clock_delay(X300_CLOCK_WHICH_ADC0); + double fpga_clk_delay = mb.clock->get_clock_delay(X300_CLOCK_WHICH_FPGA); + + //Iterate through several values of delays and measure ADC data integrity + std::vector< std::pair<double,bool> > results; + for (size_t i = 0; i < NUM_DELAY_STEPS; i++) { + //Delay the ADC clock (will set both Ch0 and Ch1 delays) + double delay = mb.clock->set_clock_delay(X300_CLOCK_WHICH_ADC0, delay_incr*i + delay_start); + wait_for_clk_locked(mb.zpu_ctrl, ZPU_RB_CLK_STATUS_LMK_LOCK, 0.1); + + boost::uint32_t err_code = 0; + for (size_t r = 0; r < mboard_members_t::NUM_RADIOS; r++) { + //Test each channel (I and Q) individually so as to not accidentally trigger + //on the data from the other channel if there is a swap + + // -- Test I Channel -- + //Put ADC in ramp test mode. Tie the other channel to all ones. + mb.radio_perifs[r].adc->set_test_word("ramp", "ones"); + //Turn on the pattern checker in the FPGA. It will lock when it sees a zero + //and count deviations from the expected value + mb.radio_perifs[r].misc_outs->write(radio_misc_outs_reg::ADC_CHECKER_ENABLED, 0); + mb.radio_perifs[r].misc_outs->write(radio_misc_outs_reg::ADC_CHECKER_ENABLED, 1); + //50ms @ 200MHz = 10 million samples + boost::this_thread::sleep(boost::posix_time::milliseconds(50)); + if (mb.radio_perifs[r].misc_ins->read(radio_misc_ins_reg::ADC_CHECKER1_I_LOCKED)) { + err_code += mb.radio_perifs[r].misc_ins->get(radio_misc_ins_reg::ADC_CHECKER1_I_ERROR); + } else { + err_code += 100; //Increment error code by 100 to indicate no lock + } + + // -- Test Q Channel -- + //Put ADC in ramp test mode. Tie the other channel to all ones. + mb.radio_perifs[r].adc->set_test_word("ones", "ramp"); + //Turn on the pattern checker in the FPGA. It will lock when it sees a zero + //and count deviations from the expected value + mb.radio_perifs[r].misc_outs->write(radio_misc_outs_reg::ADC_CHECKER_ENABLED, 0); + mb.radio_perifs[r].misc_outs->write(radio_misc_outs_reg::ADC_CHECKER_ENABLED, 1); + //50ms @ 200MHz = 10 million samples + boost::this_thread::sleep(boost::posix_time::milliseconds(50)); + if (mb.radio_perifs[r].misc_ins->read(radio_misc_ins_reg::ADC_CHECKER1_Q_LOCKED)) { + err_code += mb.radio_perifs[r].misc_ins->get(radio_misc_ins_reg::ADC_CHECKER1_Q_ERROR); + } else { + err_code += 100; //Increment error code by 100 to indicate no lock + } + } + //UHD_MSG(status) << (boost::format("XferDelay=%fns, Error=%d\n") % delay % err_code); + results.push_back(std::pair<double,bool>(delay, err_code==0)); + } + + //Calculate the valid window + int win_start_idx = -1, win_stop_idx = -1, cur_start_idx = -1, cur_stop_idx = -1; + for (size_t i = 0; i < results.size(); i++) { + std::pair<double,bool>& item = results[i]; + if (item.second) { //If data is stable + if (cur_start_idx == -1) { //This is the first window + cur_start_idx = i; + cur_stop_idx = i; + } else { //We are extending the window + cur_stop_idx = i; + } + } else { + if (cur_start_idx == -1) { //We haven't yet seen valid data + //Do nothing + } else if (win_start_idx == -1) { //We passed the first valid window + win_start_idx = cur_start_idx; + win_stop_idx = cur_stop_idx; + } else { //Update cached window if current window is larger + double cur_win_len = results[cur_stop_idx].first - results[cur_start_idx].first; + double cached_win_len = results[win_stop_idx].first - results[win_start_idx].first; + if (cur_win_len > cached_win_len) { + win_start_idx = cur_start_idx; + win_stop_idx = cur_stop_idx; + } + } + //Reset current window + cur_start_idx = -1; + cur_stop_idx = -1; + } + } + if (win_start_idx == -1) { + throw uhd::runtime_error("self_cal_adc_xfer_delay: Self calibration failed. Convergence error."); + } + + double win_center = (results[win_stop_idx].first + results[win_start_idx].first) / 2.0; + double win_length = results[win_stop_idx].first - results[win_start_idx].first; + if (win_length < master_clk_period/4) { + throw uhd::runtime_error("self_cal_adc_xfer_delay: Self calibration failed. Valid window too narrow."); + } + + //Cycle slip the relative delay by a clock cycle to prevent sample misalignment + //fpga_clk_delay > 0 and 0 < win_center < 2*(1/MCR) so one cycle slip is all we need + bool cycle_slip = (win_center-fpga_clk_delay >= master_clk_period); + if (cycle_slip) { + win_center -= master_clk_period; + } + + if (apply_delay) { + UHD_MSG(status) << "Validating..." << std::flush; + //Apply delay + win_center = mb.clock->set_clock_delay(X300_CLOCK_WHICH_ADC0, win_center); //Sets ADC0 and ADC1 + wait_for_clk_locked(mb.zpu_ctrl, ZPU_RB_CLK_STATUS_LMK_LOCK, 0.1); + //Validate + self_test_adcs(mb, 2000); + } else { + //Restore delay + mb.clock->set_clock_delay(X300_CLOCK_WHICH_ADC0, cached_clk_delay); //Sets ADC0 and ADC1 + } + + //Teardown + for (size_t r = 0; r < mboard_members_t::NUM_RADIOS; r++) { + mb.radio_perifs[r].adc->set_test_word("normal", "normal"); + mb.radio_perifs[r].misc_outs->write(radio_misc_outs_reg::ADC_CHECKER_ENABLED, 0); + } + UHD_MSG(status) << (boost::format(" done (FPGA->ADC=%.3fns%s, Window=%.3fns)\n") % + (win_center-fpga_clk_delay) % (cycle_slip?" +cyc":"") % win_length); + + return win_center; +} |