diff options
Diffstat (limited to 'host/lib/usrp/x300/x300_impl.cpp')
| -rw-r--r-- | host/lib/usrp/x300/x300_impl.cpp | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/host/lib/usrp/x300/x300_impl.cpp b/host/lib/usrp/x300/x300_impl.cpp index 4a8c12e04..051242e0a 100644 --- a/host/lib/usrp/x300/x300_impl.cpp +++ b/host/lib/usrp/x300/x300_impl.cpp @@ -888,12 +888,27 @@ void x300_impl::setup_mb(const size_t mb_i, const uhd::device_addr_t &dev_addr) //Initialize clock control registers. NOTE: This does not configure the LMK yet. const double requested_mcr = dev_addr.cast<double>("master_clock_rate", X300_DEFAULT_TICK_RATE); + //Some daughterboards may require other rates, but these defaults + //work best for all newer daughterboards (i.e. CBX, WBX, SBX, UBX, + //and TwinRX). + double default_dboard_clk_rate = requested_mcr; + if (math::frequencies_are_equal(requested_mcr, 200e6)) { + default_dboard_clk_rate = 50e6; + } else if (math::frequencies_are_equal(requested_mcr, 184.32e6)) { + default_dboard_clk_rate = 46.08e6; + } else if (math::frequencies_are_equal(requested_mcr, 120e6)) { + default_dboard_clk_rate = 40e6; + } mb.clock = x300_clock_ctrl::make(mb.zpu_spi, 1 /*slaveno*/, mb.hw_rev, requested_mcr, - dev_addr.cast<double>("dboard_clock_rate", requested_mcr / 4), + dev_addr.cast<double>("dboard_clock_rate", default_dboard_clk_rate), dev_addr.cast<double>("system_ref_rate", X300_DEFAULT_SYSREF_RATE)); + mb.fw_regmap->ref_freq_reg.write( + fw_regmap_t::ref_freq_reg_t::REF_FREQ, + uint32_t(dev_addr.cast<double>("system_ref_rate", + X300_DEFAULT_SYSREF_RATE))); //Initialize clock source to use internal reference and generate //a valid radio clock. This may change after configuration is done. |