diff options
Diffstat (limited to 'host/lib/usrp/usrp2/usrp2_impl.cpp')
| -rw-r--r-- | host/lib/usrp/usrp2/usrp2_impl.cpp | 319 |
1 files changed, 319 insertions, 0 deletions
diff --git a/host/lib/usrp/usrp2/usrp2_impl.cpp b/host/lib/usrp/usrp2/usrp2_impl.cpp new file mode 100644 index 000000000..f42be321b --- /dev/null +++ b/host/lib/usrp/usrp2/usrp2_impl.cpp @@ -0,0 +1,319 @@ +// +// Copyright 2010-2011 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 +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program. If not, see <http://www.gnu.org/licenses/>. +// + +#include "usrp2_impl.hpp" +#include "fw_common.h" +#include <uhd/exception.hpp> +#include <uhd/transport/if_addrs.hpp> +#include <uhd/transport/udp_zero_copy.hpp> +#include <uhd/usrp/device_props.hpp> +#include <uhd/exception.hpp> +#include <uhd/utils/static.hpp> +#include <uhd/utils/warning.hpp> +#include <uhd/utils/byteswap.hpp> +#include <boost/assign/list_of.hpp> +#include <boost/format.hpp> +#include <boost/foreach.hpp> +#include <boost/lexical_cast.hpp> +#include <boost/bind.hpp> +#include <boost/asio/ip/address_v4.hpp> +#include <boost/asio.hpp> //used for htonl and ntohl +#include <iostream> +#include <vector> + +using namespace uhd; +using namespace uhd::usrp; +using namespace uhd::transport; +namespace asio = boost::asio; + +/*********************************************************************** + * Discovery over the udp transport + **********************************************************************/ +static device_addrs_t usrp2_find(const device_addr_t &hint_){ + //handle the multi-device discovery + device_addrs_t hints = separate_device_addr(hint_); + if (hints.size() > 1){ + device_addrs_t found_devices; + BOOST_FOREACH(const device_addr_t &hint_i, hints){ + device_addrs_t found_devices_i = usrp2_find(hint_i); + if (found_devices_i.size() != 1) throw uhd::value_error(str(boost::format( + "Could not resolve device hint \"%s\" to a single device." + ) % hint_i.to_string())); + found_devices.push_back(found_devices_i[0]); + } + return device_addrs_t(1, combine_device_addrs(found_devices)); + } + + //initialize the hint for a single device case + UHD_ASSERT_THROW(hints.size() <= 1); + hints.resize(1); //in case it was empty + device_addr_t hint = hints[0]; + device_addrs_t usrp2_addrs; + + //return an empty list of addresses when type is set to non-usrp2 + if (hint.has_key("type") and hint["type"] != "usrp2") return usrp2_addrs; + + //if no address was specified, send a broadcast on each interface + if (not hint.has_key("addr")){ + BOOST_FOREACH(const if_addrs_t &if_addrs, get_if_addrs()){ + //avoid the loopback device + if (if_addrs.inet == asio::ip::address_v4::loopback().to_string()) continue; + + //create a new hint with this broadcast address + device_addr_t new_hint = hint; + new_hint["addr"] = if_addrs.bcast; + + //call discover with the new hint and append results + device_addrs_t new_usrp2_addrs = usrp2_find(new_hint); + usrp2_addrs.insert(usrp2_addrs.begin(), + new_usrp2_addrs.begin(), new_usrp2_addrs.end() + ); + } + return usrp2_addrs; + } + + //create a udp transport to communicate + std::string ctrl_port = boost::lexical_cast<std::string>(USRP2_UDP_CTRL_PORT); + udp_simple::sptr udp_transport = udp_simple::make_broadcast( + hint["addr"], ctrl_port + ); + + //send a hello control packet + usrp2_ctrl_data_t ctrl_data_out; + ctrl_data_out.proto_ver = uhd::htonx<boost::uint32_t>(USRP2_FW_COMPAT_NUM); + ctrl_data_out.id = uhd::htonx<boost::uint32_t>(USRP2_CTRL_ID_WAZZUP_BRO); + udp_transport->send(boost::asio::buffer(&ctrl_data_out, sizeof(ctrl_data_out))); + + //loop and recieve until the timeout + boost::uint8_t usrp2_ctrl_data_in_mem[udp_simple::mtu]; //allocate max bytes for recv + const usrp2_ctrl_data_t *ctrl_data_in = reinterpret_cast<const usrp2_ctrl_data_t *>(usrp2_ctrl_data_in_mem); + while(true){ + size_t len = udp_transport->recv(asio::buffer(usrp2_ctrl_data_in_mem)); + //std::cout << len << "\n"; + if (len > offsetof(usrp2_ctrl_data_t, data) and ntohl(ctrl_data_in->id) == USRP2_CTRL_ID_WAZZUP_DUDE){ + //make a boost asio ipv4 with the raw addr in host byte order + boost::asio::ip::address_v4 ip_addr(ntohl(ctrl_data_in->data.ip_addr)); + device_addr_t new_addr; + new_addr["type"] = "usrp2"; + new_addr["addr"] = ip_addr.to_string(); + //Attempt to read the name from the EEPROM and perform filtering. + //This operation can throw due to compatibility mismatch. + //In this case, the discovered device will be ignored. + try{ + mboard_eeprom_t mb_eeprom = usrp2_iface::make(udp_simple::make_connected( + new_addr["addr"], boost::lexical_cast<std::string>(USRP2_UDP_CTRL_PORT) + ))->mb_eeprom; + new_addr["name"] = mb_eeprom["name"]; + new_addr["serial"] = mb_eeprom["serial"]; + if ( + (not hint.has_key("name") or hint["name"] == new_addr["name"]) and + (not hint.has_key("serial") or hint["serial"] == new_addr["serial"]) + ){ + usrp2_addrs.push_back(new_addr); + } + } + catch(const std::exception &e){ + uhd::warning::post( + std::string("Ignoring discovered device\n") + + e.what() + ); + } + //dont break here, it will exit the while loop + //just continue on to the next loop iteration + } + if (len == 0) break; //timeout + } + + return usrp2_addrs; +} + +/*********************************************************************** + * Make + **********************************************************************/ +static device::sptr usrp2_make(const device_addr_t &device_addr){ + return device::sptr(new usrp2_impl(device_addr)); +} + +UHD_STATIC_BLOCK(register_usrp2_device){ + device::register_device(&usrp2_find, &usrp2_make); +} + +/*********************************************************************** + * MTU Discovery + **********************************************************************/ +struct mtu_result_t{ + size_t recv_mtu, send_mtu; +}; + +static mtu_result_t determine_mtu(const std::string &addr){ + udp_simple::sptr udp_sock = udp_simple::make_connected( + addr, BOOST_STRINGIZE(USRP2_UDP_CTRL_PORT) + ); + + //The FPGA offers 4K buffers, and the user may manually request this. + //However, multiple simultaneous receives (2DSP slave + 2DSP master), + //require that buffering to be used internally, and this is a safe setting. + boost::uint8_t buffer[2000]; + usrp2_ctrl_data_t *ctrl_data = reinterpret_cast<usrp2_ctrl_data_t *>(buffer); + static const double echo_timeout = 0.020; //20 ms + + size_t min_recv_mtu = sizeof(usrp2_ctrl_data_t), max_recv_mtu = sizeof(buffer); + size_t min_send_mtu = sizeof(usrp2_ctrl_data_t), max_send_mtu = sizeof(buffer); + + while (min_recv_mtu < max_recv_mtu){ + + size_t test_mtu = (max_recv_mtu/2 + min_recv_mtu/2 + 3) & ~3; + //std::cout << "recv_mtu " << mtu.recv_mtu << std::endl; + + ctrl_data->id = htonl(USRP2_CTRL_ID_HOLLER_AT_ME_BRO); + ctrl_data->proto_ver = htonl(USRP2_FW_COMPAT_NUM); + ctrl_data->data.echo_args.len = htonl(test_mtu); + udp_sock->send(boost::asio::buffer(buffer, sizeof(usrp2_ctrl_data_t))); + + size_t len = udp_sock->recv(boost::asio::buffer(buffer), echo_timeout); + + if (len >= test_mtu) min_recv_mtu = test_mtu; + else max_recv_mtu = test_mtu - 4; + + } + + while (min_send_mtu < max_send_mtu){ + + size_t test_mtu = (max_send_mtu/2 + min_send_mtu/2 + 3) & ~3; + //std::cout << "send_mtu " << mtu.send_mtu << std::endl; + + ctrl_data->id = htonl(USRP2_CTRL_ID_HOLLER_AT_ME_BRO); + ctrl_data->proto_ver = htonl(USRP2_FW_COMPAT_NUM); + ctrl_data->data.echo_args.len = htonl(sizeof(usrp2_ctrl_data_t)); + udp_sock->send(boost::asio::buffer(buffer, test_mtu)); + + size_t len = udp_sock->recv(boost::asio::buffer(buffer), echo_timeout); + if (len >= sizeof(usrp2_ctrl_data_t)) len = ntohl(ctrl_data->data.echo_args.len); + + if (len >= test_mtu) min_send_mtu = test_mtu; + else max_send_mtu = test_mtu - 4; + } + + mtu_result_t mtu; + mtu.recv_mtu = min_recv_mtu; + mtu.send_mtu = min_send_mtu; + return mtu; +} + +/*********************************************************************** + * Structors + **********************************************************************/ +usrp2_impl::usrp2_impl(const device_addr_t &_device_addr){ + device_addr_t device_addr = _device_addr; + + //setup the dsp transport hints (default to a large recv buff) + if (not device_addr.has_key("recv_buff_size")){ + #if defined(UHD_PLATFORM_MACOS) || defined(UHD_PLATFORM_BSD) + //limit buffer resize on macos or it will error + device_addr["recv_buff_size"] = "1e6"; + #elif defined(UHD_PLATFORM_LINUX) || defined(UHD_PLATFORM_WIN32) + //set to half-a-second of buffering at max rate + device_addr["recv_buff_size"] = "50e6"; + #endif + } + + device_addrs_t device_args = separate_device_addr(device_addr); + + //calculate the minimum send and recv mtu of all devices + mtu_result_t mtu = determine_mtu(device_args[0]["addr"]); + for (size_t i = 1; i < device_args.size(); i++){ + mtu_result_t mtu_i = determine_mtu(device_args[i]["addr"]); + mtu.recv_mtu = std::min(mtu.recv_mtu, mtu_i.recv_mtu); + mtu.send_mtu = std::min(mtu.send_mtu, mtu_i.send_mtu); + } + + //use the discovered mtu or clip the users requested mtu + mtu.recv_mtu = std::min(size_t(device_addr.cast<double>("recv_frame_size", 9000)), mtu.recv_mtu); + mtu.send_mtu = std::min(size_t(device_addr.cast<double>("send_frame_size", 9000)), mtu.send_mtu); + + device_addr["recv_frame_size"] = boost::lexical_cast<std::string>(mtu.recv_mtu); + device_addr["send_frame_size"] = boost::lexical_cast<std::string>(mtu.send_mtu); + + std::cout << boost::format("Current recv frame size: %d bytes") % mtu.recv_mtu << std::endl; + std::cout << boost::format("Current send frame size: %d bytes") % mtu.send_mtu << std::endl; + + device_args = separate_device_addr(device_addr); //update args for new frame sizes + + //setup rx otw type + _rx_otw_type.width = 16; + _rx_otw_type.shift = 0; + _rx_otw_type.byteorder = uhd::otw_type_t::BO_BIG_ENDIAN; + + //setup tx otw type + _tx_otw_type.width = 16; + _tx_otw_type.shift = 0; + _tx_otw_type.byteorder = uhd::otw_type_t::BO_BIG_ENDIAN; + + //!!!!! set the otw type here before continuing, its used below + + //create a new mboard handler for each control transport + for(size_t i = 0; i < device_args.size(); i++){ + device_addr_t dev_addr_i = device_args[i]; + BOOST_FOREACH(const std::string &key, device_addr.keys()){ + if (dev_addr_i.has_key(key)) continue; + dev_addr_i[key] = device_addr[key]; + } + _mboards.push_back(usrp2_mboard_impl::sptr( + new usrp2_mboard_impl(dev_addr_i, i, *this) + )); + //use an empty name when there is only one mboard + std::string name = (device_args.size() > 1)? boost::lexical_cast<std::string>(i) : ""; + _mboard_dict[name] = _mboards.back(); + } + + //init the send and recv io + io_init(); + +} + +usrp2_impl::~usrp2_impl(void){ + /* NOP */ +} + +/*********************************************************************** + * Device Properties + **********************************************************************/ +void usrp2_impl::get(const wax::obj &key_, wax::obj &val){ + named_prop_t key = named_prop_t::extract(key_); + + //handle the get request conditioned on the key + switch(key.as<device_prop_t>()){ + case DEVICE_PROP_NAME: + if (_mboards.size() > 1) val = std::string("USRP2/N Series multi-device"); + else val = std::string("USRP2/N Series device"); + return; + + case DEVICE_PROP_MBOARD: + val = _mboard_dict[key.name]->get_link(); + return; + + case DEVICE_PROP_MBOARD_NAMES: + val = prop_names_t(_mboard_dict.keys()); + return; + + default: UHD_THROW_PROP_GET_ERROR(); + } +} + +void usrp2_impl::set(const wax::obj &, const wax::obj &){ + UHD_THROW_PROP_SET_ERROR(); +} |