diff options
Diffstat (limited to 'host/lib/usrp')
| -rw-r--r-- | host/lib/usrp/x300/x300_clock_ctrl.cpp | 44 |
1 files changed, 28 insertions, 16 deletions
diff --git a/host/lib/usrp/x300/x300_clock_ctrl.cpp b/host/lib/usrp/x300/x300_clock_ctrl.cpp index 9bea4a4b4..6450686dd 100644 --- a/host/lib/usrp/x300/x300_clock_ctrl.cpp +++ b/host/lib/usrp/x300/x300_clock_ctrl.cpp @@ -1,5 +1,5 @@ // -// Copyright 2013-2014 Ettus Research LLC +// Copyright 2013-2015 Ettus Research LLC // // This program is free software: you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by @@ -18,6 +18,7 @@ #include "lmk04816_regs.hpp" #include "x300_clock_ctrl.hpp" #include <uhd/utils/safe_call.hpp> +#include <uhd/utils/math.hpp> #include <boost/cstdint.hpp> #include <boost/format.hpp> #include <stdexcept> @@ -96,7 +97,7 @@ public: boost::uint8_t addr = 0xFF; // Make sure requested rate is an even divisor of the VCO frequency - if (not doubles_are_equal(_vco_freq / div, rate)) + if (not math::frequencies_are_equal(_vco_freq / div, rate)) throw uhd::value_error("invalid dboard rate requested"); switch (which) @@ -236,27 +237,42 @@ private: * clock, in zero-delay mode. */ opmode_t clocking_mode = INVALID; - if(doubles_are_equal(_system_ref_rate, 10e6)) { - if(doubles_are_equal(_master_clock_rate, 184.32e6)) { + if (math::frequencies_are_equal(_system_ref_rate, 10e6)) { + if (math::frequencies_are_equal(_master_clock_rate, 184.32e6)) { /* 10MHz reference, 184.32 MHz master clock out, NOT Zero Delay. */ clocking_mode = m10M_184_32M_NOZDEL; - } else if(doubles_are_equal(_master_clock_rate, 200e6)) { + } else if (math::frequencies_are_equal(_master_clock_rate, 200e6)) { /* 10MHz reference, 200 MHz master clock out, Zero Delay */ clocking_mode = m10M_200M_ZDEL; - } else if(doubles_are_equal(_master_clock_rate, 120e6)) { + } else if (math::frequencies_are_equal(_master_clock_rate, 120e6)) { /* 10MHz reference, 120 MHz master clock rate, Zero Delay */ clocking_mode = m10M_120M_ZDEL; + } else { + throw uhd::runtime_error(str( + boost::format("Invalid master clock rate: %.2f MHz.\n" + "Valid master clock rates when using a %f MHz reference clock are:\n" + "120 MHz, 184.32 MHz and 200 MHz.") + % (_master_clock_rate / 1e6) % (_system_ref_rate / 1e6) + )); } - } else if(doubles_are_equal(_system_ref_rate, 30.72e6)) { - if(doubles_are_equal(_master_clock_rate, 184.32e6)) { + } else if (math::frequencies_are_equal(_system_ref_rate, 30.72e6)) { + if (math::frequencies_are_equal(_master_clock_rate, 184.32e6)) { /* 30.72MHz reference, 184.32 MHz master clock out, Zero Delay */ clocking_mode = m30_72M_184_32M_ZDEL; + } else { + throw uhd::runtime_error(str( + boost::format("Invalid master clock rate: %.2f MHz.\n" + "Valid master clock rate when using a %.2f MHz reference clock is: 184.32 MHz.") + % (_master_clock_rate / 1e6) % (_system_ref_rate / 1e6) + )); } + } else { + throw uhd::runtime_error(str( + boost::format("Invalid system reference rate: %.2f MHz.\nValid reference frequencies are: 10 MHz, 30.72 MHz.") + % (_system_ref_rate / 1e6) + )); } - - if(clocking_mode == INVALID) { - throw uhd::runtime_error(str(boost::format("A master clock rate of %f cannot be derived from a system reference rate of %f") % _master_clock_rate % _system_ref_rate)); - } + UHD_ASSERT_THROW(clocking_mode != INVALID); // For 200 MHz output, the VCO is run at 2400 MHz // For the LTE/CPRI rate of 184.32 MHz, the VCO runs at 2580.48 MHz @@ -496,10 +512,6 @@ private: this->sync_clocks(); } - UHD_INLINE bool doubles_are_equal(double a, double b) { - return (std::fabs(a - b) < std::numeric_limits<double>::epsilon()); - } - const spi_iface::sptr _spiface; const size_t _slaveno; const size_t _hw_rev; |