diff options
Diffstat (limited to 'host/lib/usrp')
| -rw-r--r-- | host/lib/usrp/usrp1/dsp_impl.cpp | 4 | ||||
| -rw-r--r-- | host/lib/usrp/usrp1/io_impl.cpp | 337 | ||||
| -rw-r--r-- | host/lib/usrp/usrp1/usrp1_impl.hpp | 4 |
3 files changed, 215 insertions, 130 deletions
diff --git a/host/lib/usrp/usrp1/dsp_impl.cpp b/host/lib/usrp/usrp1/dsp_impl.cpp index ce0c12e4b..ddd1e811b 100644 --- a/host/lib/usrp/usrp1/dsp_impl.cpp +++ b/host/lib/usrp/usrp1/dsp_impl.cpp @@ -95,6 +95,8 @@ void usrp1_impl::rx_dsp_set(const wax::obj &key, const wax::obj &val) } _rx_dsp_decim = rate; + _rx_samps_per_poll_interval = 0.1 * _clock_ctrl->get_master_clock_freq() / rate; + _iface->poke32(FR_DECIM_RATE, _rx_dsp_decim/2 - 1); } return; @@ -175,6 +177,8 @@ void usrp1_impl::tx_dsp_set(const wax::obj &key, const wax::obj &val) } _tx_dsp_interp = rate; + _tx_samps_per_poll_interval = 0.1 * _clock_ctrl->get_master_clock_freq() * 2 / rate; + _iface->poke32(FR_INTERP_RATE, _tx_dsp_interp / 4 - 1); return; } diff --git a/host/lib/usrp/usrp1/io_impl.cpp b/host/lib/usrp/usrp1/io_impl.cpp index 71b2c4fc5..33a04ffe6 100644 --- a/host/lib/usrp/usrp1/io_impl.cpp +++ b/host/lib/usrp/usrp1/io_impl.cpp @@ -35,41 +35,53 @@ namespace asio = boost::asio; static const float poll_interval = 0.1; //100ms -/* - * The FX2 firmware bursts data to the FPGA in 512 byte chunks so - * maintain send state to make sure that happens. - */ struct usrp1_send_state { uhd::transport::managed_send_buffer::sptr send_buff; - size_t bytes_used; + size_t bytes_written; size_t bytes_free; + size_t underrun_poll_samp_count; +}; + +struct usrp1_recv_state { + uhd::transport::managed_recv_buffer::sptr recv_buff; + size_t bytes_read; + size_t bytes_avail; + size_t overrun_poll_samp_count; }; /*********************************************************************** * IO Implementation Details **********************************************************************/ struct usrp1_impl::io_impl { - io_impl(zero_copy_if::sptr zc_if); + io_impl(); ~io_impl(void); - bool get_recv_buff(managed_recv_buffer::sptr buff); - - //state management for the vrt packet handler code - vrt_packet_handler::recv_state packet_handler_recv_state; + //state handling for buffer management + usrp1_recv_state recv_state; usrp1_send_state send_state; - zero_copy_if::sptr data_transport; - - //overun-underrun values - unsigned int tx_underrun_count; - unsigned int rx_overrun_count; + //send transport management + bool get_send_buffer(zero_copy_if::sptr zc_if); + size_t copy_convert_send_samps(const void *buff, size_t num_samps, + size_t sample_offset, const io_type_t io_type, + otw_type_t otw_type); + bool conditional_buff_commit(bool force); + bool check_underrun(usrp_ctrl::sptr ctrl_if, + size_t poll_interval, bool force); + + //recv transport management + bool get_recv_buffer(zero_copy_if::sptr zc_if); + size_t copy_convert_recv_samps(void *buff, size_t num_samps, + size_t sample_offset, const io_type_t io_type, + otw_type_t otw_type); + bool check_overrun(usrp_ctrl::sptr ctrl_if, + size_t poll_interval, bool force); }; -usrp1_impl::io_impl::io_impl(zero_copy_if::sptr zc_if) - : packet_handler_recv_state(1), data_transport(zc_if), - tx_underrun_count(0), rx_overrun_count(0) +usrp1_impl::io_impl::io_impl() { - /* NOP */ + send_state.send_buff = uhd::transport::managed_send_buffer::sptr(); + recv_state.recv_buff = uhd::transport::managed_recv_buffer::sptr(); } usrp1_impl::io_impl::~io_impl(void) @@ -87,12 +99,94 @@ void usrp1_impl::io_init(void) _tx_otw_type.shift = 0; _tx_otw_type.byteorder = otw_type_t::BO_LITTLE_ENDIAN; - _io_impl = UHD_PIMPL_MAKE(io_impl, (_data_transport)); + _io_impl = UHD_PIMPL_MAKE(io_impl, ()); } /*********************************************************************** * Data Send **********************************************************************/ +bool usrp1_impl::io_impl::get_send_buffer(zero_copy_if::sptr zc_if) +{ + if (send_state.send_buff == NULL) { + + send_state.send_buff = zc_if->get_send_buff(); + if (send_state.send_buff == NULL) + return false; + + send_state.bytes_free = send_state.send_buff->size(); + send_state.bytes_written = 0; + } + + return true; +} + +size_t usrp1_impl::io_impl::copy_convert_send_samps(const void *buff, + size_t num_samps, + size_t sample_offset, + const io_type_t io_type, + otw_type_t otw_type) +{ + UHD_ASSERT_THROW(send_state.bytes_free % otw_type.get_sample_size() == 0); + + size_t samps_free = send_state.bytes_free / otw_type.get_sample_size(); + size_t copy_samps = std::min(num_samps - sample_offset, samps_free); + + const boost::uint8_t *io_mem = + reinterpret_cast<const boost::uint8_t *>(buff); + + boost::uint8_t *otw_mem = send_state.send_buff->cast<boost::uint8_t *>(); + + convert_io_type_to_otw_type(io_mem + sample_offset * io_type.size, + io_type, + otw_mem + send_state.bytes_written, + otw_type, + copy_samps); + + send_state.bytes_written += copy_samps * otw_type.get_sample_size(); + send_state.bytes_free -= copy_samps * otw_type.get_sample_size(); + send_state.underrun_poll_samp_count += copy_samps; + + return copy_samps; +} + +bool usrp1_impl::io_impl::conditional_buff_commit(bool force) +{ + if (send_state.bytes_written % 512) + return false; + + if (force || send_state.bytes_free == 0) { + send_state.send_buff->commit(send_state.bytes_written); + send_state.send_buff = uhd::transport::managed_send_buffer::sptr(); + return true; + } + + return false; +} + +bool usrp1_impl::io_impl::check_underrun(usrp_ctrl::sptr ctrl_if, + size_t poll_interval, + bool force) +{ + unsigned char underrun = 0; + + bool ready_to_poll = send_state.underrun_poll_samp_count > poll_interval; + + if (force || ready_to_poll) { + int ret = ctrl_if->usrp_control_read(VRQ_GET_STATUS, + 0, + GS_TX_UNDERRUN, + &underrun, sizeof(char)); + if (ret < 0) + std::cerr << "USRP: underrun check failed" << std::endl; + if (underrun) + std::cerr << "U" << std::endl; + + send_state.underrun_poll_samp_count = 0; + } + + return (bool) underrun; +} + size_t usrp1_impl::send(const std::vector<const void *> &buffs, size_t num_samps, const tx_metadata_t &, @@ -104,57 +198,21 @@ size_t usrp1_impl::send(const std::vector<const void *> &buffs, size_t total_samps_sent = 0; while (total_samps_sent < num_samps) { - - if (_io_impl->send_state.send_buff == NULL) { - _io_impl->send_state.send_buff = _data_transport->get_send_buff(); - if (_io_impl->send_state.send_buff == NULL) { - return 0; - } - _io_impl->send_state.bytes_used = 0; - _io_impl->send_state.bytes_free = _io_impl->send_state.send_buff->size(); - } - - size_t copy_samps = - std::min(num_samps - total_samps_sent, _io_impl->send_state.bytes_free / _tx_otw_type.get_sample_size()); - - const boost::uint8_t *io_mem = - reinterpret_cast<const boost::uint8_t *>(buffs[0]); - - boost::uint8_t *otw_mem = _io_impl->send_state.send_buff->cast<boost::uint8_t *>(); - - // Type conversion and copy - convert_io_type_to_otw_type( - io_mem + total_samps_sent * io_type.size, - io_type, - otw_mem + _io_impl->send_state.bytes_used, - _tx_otw_type, - copy_samps); - - _io_impl->send_state.bytes_used += copy_samps * _tx_otw_type.get_sample_size(); - _io_impl->send_state.bytes_free -= copy_samps * _tx_otw_type.get_sample_size(); - - if (_io_impl->send_state.bytes_free == 0) { - _io_impl->send_state.send_buff->commit(_io_impl->send_state.bytes_used); - _io_impl->send_state.send_buff = uhd::transport::managed_send_buffer::sptr(); - } - - total_samps_sent += copy_samps; - _io_impl->tx_underrun_count += copy_samps * _tx_otw_type.get_sample_size(); - - //check for underruns - if (!(_io_impl->tx_underrun_count > _tx_dsp_freq * poll_interval * _tx_otw_type.get_sample_size())) { - unsigned char underrun; - int ret = _ctrl_transport->usrp_control_read(VRQ_GET_STATUS, - 0, - GS_TX_UNDERRUN, - &underrun, sizeof(char)); - if (ret < 0) - std::cerr << "error: underrun check failed" << std::endl; - if (underrun) - std::cerr << "U" << std::endl; - - _io_impl->tx_underrun_count = 0; - } + if (!_io_impl->get_send_buffer(_data_transport)) + return 0; + + total_samps_sent += _io_impl->copy_convert_send_samps(buffs[0], + num_samps, + total_samps_sent, + io_type, + _tx_otw_type); + if (total_samps_sent == num_samps) + _io_impl->conditional_buff_commit(true); + else + _io_impl->conditional_buff_commit(false); + + _io_impl->check_underrun(_ctrl_transport, + _tx_samps_per_poll_interval, false); } return total_samps_sent; @@ -163,17 +221,72 @@ size_t usrp1_impl::send(const std::vector<const void *> &buffs, /*********************************************************************** * Data Recv **********************************************************************/ -void _recv_helper(vrt_packet_handler::recv_state &state) +bool usrp1_impl::io_impl::get_recv_buffer(zero_copy_if::sptr zc_if) +{ + if ((recv_state.recv_buff == NULL) || (recv_state.bytes_avail == 0)) { + + recv_state.recv_buff = zc_if->get_recv_buff(); + if (recv_state.recv_buff == NULL) + return false; + + recv_state.bytes_read = 0; + recv_state.bytes_avail = recv_state.recv_buff->size(); + } + + return true; +} + +size_t usrp1_impl::io_impl::copy_convert_recv_samps(void *buff, + size_t num_samps, + size_t sample_offset, + const io_type_t io_type, + otw_type_t otw_type) +{ + UHD_ASSERT_THROW(recv_state.bytes_avail % otw_type.get_sample_size() == 0); + + size_t samps_avail = recv_state.bytes_avail / otw_type.get_sample_size(); + size_t copy_samps = std::min(num_samps - sample_offset, samps_avail); + + const boost::uint8_t *otw_mem = + recv_state.recv_buff->cast<const boost::uint8_t *>(); + + boost::uint8_t *io_mem = reinterpret_cast<boost::uint8_t *>(buff); + + convert_otw_type_to_io_type(otw_mem + recv_state.bytes_read, + otw_type, + io_mem + sample_offset * io_type.size, + io_type, + copy_samps); + + recv_state.bytes_read += copy_samps * otw_type.get_sample_size(); + recv_state.bytes_avail -= copy_samps * otw_type.get_sample_size(); + recv_state.overrun_poll_samp_count += copy_samps; + + return copy_samps; +} + +bool usrp1_impl::io_impl::check_overrun(usrp_ctrl::sptr ctrl_if, + size_t poll_interval, + bool force) { - size_t num_packet_words32 = - state.managed_buffs[0]->size() / sizeof(boost::uint32_t); + unsigned char overrun = 0; + + bool ready_to_poll = recv_state.overrun_poll_samp_count > poll_interval; - const boost::uint32_t *data = - state.managed_buffs[0]->cast<const boost::uint32_t *>(); + if (force || ready_to_poll) { + int ret = ctrl_if->usrp_control_read(VRQ_GET_STATUS, + 0, + GS_RX_OVERRUN, + &overrun, sizeof(char)); + if (ret < 0) + std::cerr << "USRP: overrrun check failed" << std::endl; + if (overrun) + std::cerr << "O" << std::endl; + + recv_state.overrun_poll_samp_count = 0; + } - state.copy_buffs[0] = reinterpret_cast<const boost::uint8_t *>(data); - size_t num_payload_bytes = num_packet_words32 * sizeof(boost::uint32_t); - state.size_of_copy_buffs = num_payload_bytes; + return (bool) overrun; } size_t usrp1_impl::recv(const std::vector<void *> &buffs, @@ -183,59 +296,23 @@ size_t usrp1_impl::recv(const std::vector<void *> &buffs, recv_mode_t, size_t) { - UHD_ASSERT_THROW(_io_impl->packet_handler_recv_state.width == 1); UHD_ASSERT_THROW(buffs.size() == 1); - size_t sent_samps = 0; - size_t nsamps_to_copy = 0;; - - while (sent_samps < num_samps) { - if (_io_impl->packet_handler_recv_state.size_of_copy_buffs == 0) { - _io_impl->packet_handler_recv_state.fragment_offset_in_samps = 0; - _io_impl->packet_handler_recv_state.managed_buffs[0] = - _io_impl->data_transport->get_recv_buff(); - - //timeout or something bad returns zero - if (!_io_impl->packet_handler_recv_state.managed_buffs[0].get()) - return 0; - - _recv_helper(_io_impl->packet_handler_recv_state); - } - - size_t bytes_per_item = _rx_otw_type.get_sample_size(); - size_t nsamps_available = - _io_impl->packet_handler_recv_state.size_of_copy_buffs / bytes_per_item; - nsamps_to_copy = std::min(num_samps, nsamps_available); - size_t bytes_to_copy = nsamps_to_copy * bytes_per_item; - - convert_otw_type_to_io_type( - _io_impl->packet_handler_recv_state.copy_buffs[0], - _rx_otw_type, - reinterpret_cast<boost::uint8_t *>(buffs[0]) + sent_samps * io_type.size, - io_type, - nsamps_to_copy); - - _io_impl->packet_handler_recv_state.copy_buffs[0] += bytes_to_copy; - _io_impl->packet_handler_recv_state.size_of_copy_buffs -= bytes_to_copy; - _io_impl->rx_overrun_count += nsamps_to_copy; - - sent_samps += nsamps_to_copy; - - //check for overruns - if (_io_impl->rx_overrun_count > (8e6 * poll_interval)) { - unsigned char overrun; - int ret = _ctrl_transport->usrp_control_read(VRQ_GET_STATUS, - 0, - GS_RX_OVERRUN, - &overrun, sizeof(char)); - if (ret < 0) - std::cerr << "error: overrun check failed" << std::endl; - if (overrun) - std::cerr << "O" << std::endl; - - _io_impl->rx_overrun_count = 0; - } + size_t total_samps_recv = 0; + + while (total_samps_recv < num_samps) { + + if (!_io_impl->get_recv_buffer(_data_transport)) + return 0; + + total_samps_recv += _io_impl->copy_convert_recv_samps(buffs[0], + num_samps, + total_samps_recv, + io_type, + _rx_otw_type); + _io_impl->check_overrun(_ctrl_transport, + _rx_samps_per_poll_interval, false); } - return sent_samps; + return total_samps_recv; } diff --git a/host/lib/usrp/usrp1/usrp1_impl.hpp b/host/lib/usrp/usrp1/usrp1_impl.hpp index f57f9a09a..5934d1779 100644 --- a/host/lib/usrp/usrp1/usrp1_impl.hpp +++ b/host/lib/usrp/usrp1/usrp1_impl.hpp @@ -124,6 +124,10 @@ private: void issue_stream_cmd(const uhd::stream_cmd_t &stream_cmd); void handle_overrun(size_t); + //underrun and overrun poll intervals + size_t _rx_samps_per_poll_interval; + size_t _tx_samps_per_poll_interval; + //otw types uhd::otw_type_t _rx_otw_type; uhd::otw_type_t _tx_otw_type; |