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, 18 insertions, 1 deletions
diff --git a/host/lib/usrp/b200/b200_io_impl.cpp b/host/lib/usrp/b200/b200_io_impl.cpp index eb7bbe048..52a90a623 100644 --- a/host/lib/usrp/b200/b200_io_impl.cpp +++ b/host/lib/usrp/b200/b200_io_impl.cpp @@ -81,6 +81,7 @@ void b200_impl::set_auto_tick_rate( if (num_chans == 0) { // Divine them num_chans = std::max(size_t(1), max_chan_count()); } + const double max_tick_rate = ad9361_device_t::AD9361_MAX_CLOCK_RATE/num_chans; // See also the doxygen documentation for these steps in b200_impl.hpp // Step 1: Obtain LCM and max rate from all relevant dsps @@ -94,6 +95,13 @@ void b200_impl::set_auto_tick_rate( continue; } double this_dsp_rate = _tree->access<double>(dsp_path / "rate/value").get(); + // Check if the user selected something completely unreasonable: + if (this_dsp_rate > 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 == B200_DEFAULT_RATE, we assume the user did not actually set // the sampling rate. If the user *did* set the rate to // B200_DEFAULT_RATE on all DSPs, then this will still work (see below). @@ -118,7 +126,6 @@ void b200_impl::set_auto_tick_rate( // Step 2: Determine whether if we can use lcm_rate (preferred), // or have to give up because too large: - const double max_tick_rate = ad9361_device_t::AD9361_MAX_CLOCK_RATE/num_chans; double base_rate = static_cast<double>(lcm_rate); if (base_rate > max_tick_rate) { UHD_MSG(warning) @@ -175,10 +182,19 @@ void b200_impl::update_tick_rate(const double new_tick_rate) } } +#define CHECK_RATE_AND_THROW(rate) \ + if (rate >ad9361_device_t::AD9361_MAX_CLOCK_RATE ) { \ + throw uhd::value_error(str( \ + boost::format("Requested sampling rate (%.2f Msps) exceeds maximum tick rate.") \ + % (rate / 1e6) \ + )); \ + } + double b200_impl::coerce_rx_samp_rate(rx_dsp_core_3000::sptr ddc, size_t dspno, const double rx_rate) { // Have to set tick rate first, or the ddc will change the requested rate based on default tick rate if (_tree->access<bool>("/mboards/0/auto_tick_rate").get()) { + CHECK_RATE_AND_THROW(rx_rate); const std::string dsp_path = (boost::format("/mboards/0/rx_dsps/%s") % dspno).str(); set_auto_tick_rate(rx_rate, dsp_path); } @@ -208,6 +224,7 @@ double b200_impl::coerce_tx_samp_rate(tx_dsp_core_3000::sptr duc, size_t dspno, { // Have to set tick rate first, or the duc will change the requested rate based on default tick rate if (_tree->access<bool>("/mboards/0/auto_tick_rate").get()) { + CHECK_RATE_AND_THROW(tx_rate); const std::string dsp_path = (boost::format("/mboards/0/tx_dsps/%s") % dspno).str(); set_auto_tick_rate(tx_rate, dsp_path); } |