x300,nirio: Added support for NI-RIO 14.0

- Split niriok_proxy interfaces to support NI-RIO <=13.0 and >=14.0 kernel interfaces
- Fixed multi-session race conditions by synchronizing niriok_proxy access
- Fixed bug switching from NI LV-FPGA access to UHD access by changing how devices are hashed into a reservation table
- Fixed calculation of FRAC values for CBX and SBX LO tuning by rounding instead of truncating
- Fixed bug that was not setting two MSBs for band select configuration of CBX LO
- Submitting on behalf of Patrick Sisterhen, Matthew Crymble

1 files changed, 2 insertions, 1 deletions

diff --git a/host/lib/usrp/common/adf435x_common.cpp b/host/lib/usrp/common/adf435x_common.cpp
index 972a69388..9b362a4d9 100644
--- a/host/lib/usrp/common/adf435x_common.cpp
+++ b/host/lib/usrp/common/adf435x_common.cpp
@@ -17,6 +17,7 @@
 
 #include "adf435x_common.hpp"
 
+#include <boost/math/special_functions/round.hpp>
 #include <uhd/types/tune_request.hpp>
 #include <uhd/utils/log.hpp>
 #include <cmath>
@@ -96,7 +97,7 @@ adf435x_tuning_settings tune_adf435x_synth(
 
     //Fractional-N calculation
     MOD = 4095; //max fractional accuracy
-    FRAC = static_cast<boost::uint16_t>((feedback_freq/pfd_freq - N)*MOD);
+    FRAC = static_cast<boost::uint16_t>(boost::math::round((feedback_freq/pfd_freq - N)*MOD));
     if (constraints.force_frac0) {
         if (FRAC > (MOD / 2)) { //Round integer such that actual freq is closest to target
             N++;