diff options
Diffstat (limited to 'host/lib/usrp')
| -rw-r--r-- | host/lib/usrp/dboard/db_rfx.cpp | 39 |
1 files changed, 17 insertions, 22 deletions
diff --git a/host/lib/usrp/dboard/db_rfx.cpp b/host/lib/usrp/dboard/db_rfx.cpp index f938c749a..725b5cc03 100644 --- a/host/lib/usrp/dboard/db_rfx.cpp +++ b/host/lib/usrp/dboard/db_rfx.cpp @@ -312,8 +312,7 @@ double rfx_xcvr::set_lo_freq( (8, adf4360_regs_t::BAND_SELECT_CLOCK_DIV_8) ; - std::vector<double> clock_rates = this->get_iface()->get_clock_rates(unit); - double actual_freq = 0, ref_freq = 0; + double actual_freq=0, ref_freq = this->get_iface()->get_clock_rate(unit); int R=0, BS=0, P=0, B=0, A=0; /* @@ -326,31 +325,27 @@ double rfx_xcvr::set_lo_freq( * fvco = [P*B + A] * fref/R * fvco*R/fref = P*B + A = N */ - for(R = 1; R <= 32; R+=((R==1)?1:2)){ - BOOST_FOREACH(ref_freq, uhd::reversed(uhd::sorted(clock_rates))){ - BOOST_FOREACH(BS, bandsel_to_enum.keys()){ - if (ref_freq/R/BS > 1e6) continue; //constraint on band select clock - BOOST_FOREACH(P, prescaler_to_enum.keys()){ - //calculate B and A from N - double N = target_freq*R/ref_freq; - B = int(std::floor(N/P)); - A = boost::math::iround(N - P*B); - if (B < A or B > 8191 or B < 3 or A > 31) continue; //constraints on A, B - //calculate the actual frequency - actual_freq = double(P*B + A)*ref_freq/R; - if (actual_freq/P > 300e6) continue; //constraint on prescaler output - //constraints met: exit loop - goto done_loop; - } + for(R = 2; R <= 32; R+=2){ + BOOST_FOREACH(BS, bandsel_to_enum.keys()){ + if (ref_freq/R/BS > 1e6) continue; //constraint on band select clock + BOOST_FOREACH(P, prescaler_to_enum.keys()){ + //calculate B and A from N + double N = target_freq*R/ref_freq; + B = int(std::floor(N/P)); + A = boost::math::iround(N - P*B); + if (B < A or B > 8191 or B < 3 or A > 31) continue; //constraints on A, B + //calculate the actual frequency + actual_freq = double(P*B + A)*ref_freq/R; + if (actual_freq/P > 300e6) continue; //constraint on prescaler output + //constraints met: exit loop + goto done_loop; } } } done_loop: if (rfx_debug) std::cerr << boost::format( - "RFX tune: R=%d, BS=%d, P=%d, B=%d, A=%d, DIV2=%d, ref=%fMHz" - ) % R % BS % P % B % A % int(_div2[unit] && (!is_rx_rfx400)) % (ref_freq/1e6) << std::endl; - - this->get_iface()->set_clock_rate(unit, ref_freq); + "RFX tune: R=%d, BS=%d, P=%d, B=%d, A=%d, DIV2=%d" + ) % R % BS % P % B % A % int(_div2[unit] && (!is_rx_rfx400)) << std::endl; //load the register values adf4360_regs_t regs; |