diff options
Diffstat (limited to 'host/lib/usrp/usrp2/mboard_impl.cpp')
| -rw-r--r-- | host/lib/usrp/usrp2/mboard_impl.cpp | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/host/lib/usrp/usrp2/mboard_impl.cpp b/host/lib/usrp/usrp2/mboard_impl.cpp index 29867cf9d..ac447d209 100644 --- a/host/lib/usrp/usrp2/mboard_impl.cpp +++ b/host/lib/usrp/usrp2/mboard_impl.cpp @@ -27,6 +27,10 @@ #include <iostream> #include <boost/date_time/posix_time/posix_time.hpp> +static const double mimo_clock_delay_usrp2_rev4 = 4.18e-9; +static const double mimo_clock_delay_usrp_n2xx = 0; //TODO +static const int mimo_clock_sync_delay_cycles = 134; + using namespace uhd; using namespace uhd::usrp; using namespace boost::posix_time; @@ -196,27 +200,30 @@ void usrp2_mboard_impl::update_clock_config(void){ // - Masters always drive the clock over serdes. // - Slaves always lock to this serdes clock. // - Slaves lock their time over the serdes. - const bool master_mode = bool(_iface->peek32(_iface->regs.status) & (1 << 8)); - _clock_ctrl->enable_mimo_clock_out(master_mode); - if (master_mode){ + if (_iface->peek32(_iface->regs.status) & (1 << 8)){ + _clock_ctrl->enable_mimo_clock_out(true); switch(_iface->get_rev()){ case usrp2_iface::USRP_N200: case usrp2_iface::USRP_N210: - _clock_ctrl->set_mimo_clock_delay(0/*TODO*/); + _clock_ctrl->set_mimo_clock_delay(mimo_clock_delay_usrp_n2xx); break; case usrp2_iface::USRP2_REV4: - _clock_ctrl->set_mimo_clock_delay(3.08e-9); + _clock_ctrl->set_mimo_clock_delay(mimo_clock_delay_usrp2_rev4); break; default: break; //not handled } + _iface->poke32(_iface->regs.time64_mimo_sync, 0); } else{ _iface->poke32(_iface->regs.misc_ctrl_clock, 0x15); _clock_ctrl->enable_external_ref(true); + _clock_ctrl->enable_mimo_clock_out(false); + _iface->poke32(_iface->regs.time64_mimo_sync, + (1 << 8) | (mimo_clock_sync_delay_cycles & 0xff) + ); } - //TODO slaves lock time over the serdes... } |