diff options
Diffstat (limited to 'host')
| -rw-r--r-- | host/lib/usrp/x300/x300_adc_dac_utils.cpp | 47 | ||||
| -rw-r--r-- | host/lib/usrp/x300/x300_radio_ctrl_impl.cpp | 20 |
2 files changed, 14 insertions, 53 deletions
diff --git a/host/lib/usrp/x300/x300_adc_dac_utils.cpp b/host/lib/usrp/x300/x300_adc_dac_utils.cpp index 6fd0ca50b..a6815286e 100644 --- a/host/lib/usrp/x300/x300_adc_dac_utils.cpp +++ b/host/lib/usrp/x300/x300_adc_dac_utils.cpp @@ -21,53 +21,6 @@ using namespace uhd::usrp::x300; /*********************************************************************** - * 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(); - } - - //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(uhd::usrp::radio::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 - 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(uhd::usrp::radio::sr_addr(uhd::usrp::radio::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 **********************************************************************/ diff --git a/host/lib/usrp/x300/x300_radio_ctrl_impl.cpp b/host/lib/usrp/x300/x300_radio_ctrl_impl.cpp index 69eb51f55..a3bc2e691 100644 --- a/host/lib/usrp/x300/x300_radio_ctrl_impl.cpp +++ b/host/lib/usrp/x300/x300_radio_ctrl_impl.cpp @@ -608,8 +608,14 @@ void x300_radio_ctrl_impl::synchronize_dacs(const std::vector<x300_radio_ctrl_im 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 - uint64_t t_sync_us = (t_elapsed.total_microseconds() * 2) + 13000 /*Scheduler latency*/; + //Set tick rate and make sure FRAMEP/N is 0 + for (size_t i = 0; i < radios.size(); i++) { + radios[i]->set_command_tick_rate(radios[i]->_radio_clk_rate, IO_MASTER_RADIO); + radios[i]->_regs->misc_outs_reg.write(radio_regmap_t::misc_outs_reg_t::DAC_SYNC, 0); + } + + //Add 100% of headroom + uncertainty to the command time + uint64_t t_sync_us = (t_elapsed.total_microseconds() * 2) + 16000 /*Scheduler latency*/; //Pick radios[0] as the time reference. uhd::time_spec_t sync_time = @@ -617,15 +623,17 @@ void x300_radio_ctrl_impl::synchronize_dacs(const std::vector<x300_radio_ctrl_im //Send the sync command for (size_t i = 0; i < radios.size(); i++) { - radios[i]->set_command_tick_rate(radios[i]->_radio_clk_rate, IO_MASTER_RADIO); - radios[i]->_regs->misc_outs_reg.set(radio_regmap_t::misc_outs_reg_t::DAC_SYNC, 0); radios[i]->set_command_time(sync_time, IO_MASTER_RADIO); //Arm FRAMEP/N sync pulse by asserting a rising edge - radios[i]->_regs->misc_outs_reg.set(radio_regmap_t::misc_outs_reg_t::DAC_SYNC, 1); - radios[i]->_regs->misc_outs_reg.set(radio_regmap_t::misc_outs_reg_t::DAC_SYNC, 0); + radios[i]->_regs->misc_outs_reg.write(radio_regmap_t::misc_outs_reg_t::DAC_SYNC, 1); radios[i]->set_command_time(uhd::time_spec_t(0.0), IO_MASTER_RADIO); } + //Reset FRAMEP/N to 0 + for (size_t i = 0; i < radios.size(); i++) { + radios[i]->_regs->misc_outs_reg.write(radio_regmap_t::misc_outs_reg_t::DAC_SYNC, 0); + } + //Wait and check status boost::this_thread::sleep(boost::posix_time::microseconds(t_sync_us)); for (size_t i = 0; i < radios.size(); i++) { |