diff options
Diffstat (limited to 'host')
| -rw-r--r-- | host/lib/usrp/x300/x300_impl.cpp | 112 |
1 files changed, 65 insertions, 47 deletions
diff --git a/host/lib/usrp/x300/x300_impl.cpp b/host/lib/usrp/x300/x300_impl.cpp index a2b2c9f9e..ded7e9408 100644 --- a/host/lib/usrp/x300/x300_impl.cpp +++ b/host/lib/usrp/x300/x300_impl.cpp @@ -1799,59 +1799,77 @@ void x300_impl::self_cal_adc_capture_delay(mboard_members_t& mb, const size_t ra 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 - int win_start = -1, win_stop = -1; + 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; - 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::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; + 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 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 - } + // -- 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; + 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 { - if (win_start != -1) { //A valid window turned invalid - if (win_stop - win_start >= 4) break; - } + break; } - //UHD_MSG(status) << (boost::format("CapTap=%d, Error=%d\n") % dly_tap % err_code); } perif.adc->set_test_word("normal", "normal"); perif.misc_outs->write(radio_misc_outs_reg::ADC_CHECKER_ENABLED, 0); @@ -1860,7 +1878,7 @@ void x300_impl::self_cal_adc_capture_delay(mboard_members_t& mb, const size_t ra throw uhd::runtime_error("self_cal_adc_capture_delay: Self calibration failed. Convergence error."); } - if (win_stop-win_start < 4) { + if (win_stop-win_start < MIN_WINDOW_LEN) { throw uhd::runtime_error("self_cal_adc_capture_delay: Self calibration failed. Valid window too narrow."); } @@ -1871,7 +1889,7 @@ void x300_impl::self_cal_adc_capture_delay(mboard_members_t& mb, const size_t ra 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)\n") % ideal_tap % (win_stop-win_start) % tap_delay; + UHD_MSG(status) << boost::format(" done (Tap=%d, Window=%d, TapDelay=%.3fps, Iter=%d)\n") % ideal_tap % (win_stop-win_start) % tap_delay % iter; } } |