diff options
Diffstat (limited to 'host/lib/usrp/b200/b200_io_impl.cpp')
| -rw-r--r-- | host/lib/usrp/b200/b200_io_impl.cpp | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/host/lib/usrp/b200/b200_io_impl.cpp b/host/lib/usrp/b200/b200_io_impl.cpp index 98347b114..85d61280f 100644 --- a/host/lib/usrp/b200/b200_io_impl.cpp +++ b/host/lib/usrp/b200/b200_io_impl.cpp @@ -82,9 +82,9 @@ void b200_impl::set_auto_tick_rate( num_chans = std::max(size_t(1), max_chan_count()); } const double max_tick_rate = ad9361_device_t::AD9361_MAX_CLOCK_RATE/num_chans; + using namespace uhd::math; if (rate != 0.0 and - (uhd::math::fp_compare::fp_compare_delta<double>(rate, uhd::math::FREQ_COMPARISON_DELTA_HZ) > - uhd::math::fp_compare::fp_compare_delta<double>(max_tick_rate, uhd::math::FREQ_COMPARISON_DELTA_HZ))) { + (fp_compare::fp_compare_delta<double>(rate, FREQ_COMPARISON_DELTA_HZ) > max_tick_rate)) { throw uhd::value_error(str( boost::format("Requested sampling rate (%.2f Msps) exceeds maximum tick rate of %.2f MHz.") % (rate / 1e6) % (max_tick_rate / 1e6) @@ -96,26 +96,25 @@ void b200_impl::set_auto_tick_rate( boost::uint32_t lcm_rate = (rate == 0) ? 1 : static_cast<boost::uint32_t>(floor(rate + 0.5)); for (int i = 0; i < 2; i++) { // Loop through rx and tx std::string dir = (i == 0) ? "tx" : "rx"; - // We have no way of knowing which DSPs are used, so we check them all. + // We assume all 'set' DSPs are being used. BOOST_FOREACH(const std::string &dsp_no, _tree->list(str(boost::format("/mboards/0/%s_dsps") % dir))) { fs_path dsp_path = str(boost::format("/mboards/0/%s_dsps/%s") % dir % dsp_no); if (dsp_path == tree_dsp_path) { continue; } + if (not _tree->access<bool>(dsp_path / "rate/set").get()) { + continue; + } double this_dsp_rate = _tree->access<double>(dsp_path / "rate/value").get(); // Check if the user selected something completely unreasonable: - if (uhd::math::fp_compare::fp_compare_delta<double>(this_dsp_rate, uhd::math::FREQ_COMPARISON_DELTA_HZ) > - uhd::math::fp_compare::fp_compare_delta<double>(max_tick_rate, uhd::math::FREQ_COMPARISON_DELTA_HZ)) { + if (fp_compare::fp_compare_delta<double>(this_dsp_rate, FREQ_COMPARISON_DELTA_HZ) > max_tick_rate) { throw uhd::value_error(str( boost::format("Requested sampling rate (%.2f Msps) exceeds maximum tick rate of %.2f MHz.") % (this_dsp_rate / 1e6) % (max_tick_rate / 1e6) )); } - // If this_dsp_rate == 0.0, the sampling rate for this DSP hasn't been set, so - // we don't take that into consideration. - if (this_dsp_rate == 0.0) { - continue; - } + // Clean up floating point rounding errors if they crept in + this_dsp_rate = std::min(max_tick_rate, this_dsp_rate); lcm_rate = boost::math::lcm<boost::uint32_t>( lcm_rate, static_cast<boost::uint32_t>(floor(this_dsp_rate + 0.5)) |