diff options
Diffstat (limited to 'host/lib/usrp/usrp2/mboard_impl.cpp')
| -rw-r--r-- | host/lib/usrp/usrp2/mboard_impl.cpp | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/host/lib/usrp/usrp2/mboard_impl.cpp b/host/lib/usrp/usrp2/mboard_impl.cpp index 65066f125..5210eee94 100644 --- a/host/lib/usrp/usrp2/mboard_impl.cpp +++ b/host/lib/usrp/usrp2/mboard_impl.cpp @@ -39,7 +39,8 @@ usrp2_mboard_impl::usrp2_mboard_impl( size_t index, transport::udp_simple::sptr ctrl_transport, size_t recv_samps_per_packet, - size_t send_bytes_per_packet + size_t send_bytes_per_packet, + const device_addr_t &flow_control_hints ): _index(index), _recv_samps_per_packet(recv_samps_per_packet) @@ -89,11 +90,16 @@ usrp2_mboard_impl::usrp2_mboard_impl( _iface->poke32(U2_REG_TX_CTRL_CLEAR_STATE, 1); //reset _iface->poke32(U2_REG_TX_CTRL_REPORT_SID, 1); //sid 1 (different from rx) _iface->poke32(U2_REG_TX_CTRL_POLICY, U2_FLAG_TX_CTRL_POLICY_NEXT_PACKET); - const size_t cycles_per_ack = size_t(_clock_ctrl->get_master_clock_rate()/100); //100 aps - _iface->poke32(U2_REG_TX_CTRL_CYCLES_PER_ACK, U2_FLAG_TX_CTRL_ACK_ENB | cycles_per_ack); - static const double sram_frac = 1.0/8.0; //fraction of sram to fill before ack - const size_t packets_per_ack = size_t(usrp2_impl::sram_bytes*sram_frac/send_bytes_per_packet); - _iface->poke32(U2_REG_TX_CTRL_PACKETS_PER_ACK, U2_FLAG_TX_CTRL_ACK_ENB | packets_per_ack); + + //setting the cycles per update + const double ups_per_sec = flow_control_hints.cast<double>("ups_per_sec", 100); + const size_t cycles_per_up = size_t(_clock_ctrl->get_master_clock_rate()/ups_per_sec); + _iface->poke32(U2_REG_TX_CTRL_CYCLES_PER_UP, U2_FLAG_TX_CTRL_UP_ENB | cycles_per_up); + + //setting the packets per update + const double ups_per_fifo = flow_control_hints.cast<double>("ups_per_fifo", 8); + const size_t packets_per_up = size_t(usrp2_impl::sram_bytes/ups_per_fifo/send_bytes_per_packet); + _iface->poke32(U2_REG_TX_CTRL_PACKETS_PER_UP, U2_FLAG_TX_CTRL_UP_ENB | packets_per_up); //init the ddc init_ddc_config(); @@ -116,8 +122,8 @@ usrp2_mboard_impl::usrp2_mboard_impl( } usrp2_mboard_impl::~usrp2_mboard_impl(void){ - _iface->poke32(U2_REG_TX_CTRL_CYCLES_PER_ACK, 0); - _iface->poke32(U2_REG_TX_CTRL_PACKETS_PER_ACK, 0); + _iface->poke32(U2_REG_TX_CTRL_CYCLES_PER_UP, 0); + _iface->poke32(U2_REG_TX_CTRL_PACKETS_PER_UP, 0); } /*********************************************************************** |