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Diffstat (limited to 'host/lib/usrp/usrp2/usrp2_impl.cpp')
| -rw-r--r-- | host/lib/usrp/usrp2/usrp2_impl.cpp | 308 |
1 files changed, 308 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..f910999d4 --- /dev/null +++ b/host/lib/usrp/usrp2/usrp2_impl.cpp @@ -0,0 +1,308 @@ +// +// Copyright 2010 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 <uhd/transport/if_addrs.hpp> +#include <uhd/transport/udp_zero_copy.hpp> +#include <uhd/usrp/device_props.hpp> +#include <uhd/utils/assert.hpp> +#include <uhd/utils/static.hpp> +#include <uhd/utils/warning.hpp> +#include <uhd/utils/algorithm.hpp> +#include <boost/assign/list_of.hpp> +#include <boost/format.hpp> +#include <boost/foreach.hpp> +#include <boost/lexical_cast.hpp> +#include <boost/regex.hpp> +#include <boost/bind.hpp> +#include <boost/asio.hpp> //htonl and ntohl +#include <iostream> + +using namespace uhd; +using namespace uhd::usrp; +using namespace uhd::transport; +namespace asio = boost::asio; + +/*********************************************************************** + * Helper Functions + **********************************************************************/ +template <class T> std::string num2str(T num){ + return boost::lexical_cast<std::string>(num); +} + +//! separate indexed device addresses into a vector of device addresses +device_addrs_t sep_indexed_dev_addrs(const device_addr_t &dev_addr){ + //------------ support old deprecated way and print warning -------- + if (dev_addr.has_key("addr")){ + std::vector<std::string> addrs = std::split_string(dev_addr["addr"]); + if (addrs.size() > 1){ + device_addr_t fixed_dev_addr = dev_addr; + fixed_dev_addr.pop("addr"); + for (size_t i = 0; i < addrs.size(); i++){ + fixed_dev_addr[str(boost::format("addr%d") % i)] = addrs[i]; + } + uhd::warning::post( + "addr = <space separated list of ip addresses> is deprecated.\n" + "To address a multi-device, use multiple <key><index> = <val>.\n" + "See the USRP-NXXX application notes. Two device example:\n" + " addr0 = 192.168.10.2\n" + " addr1 = 192.168.10.3\n" + ); + return sep_indexed_dev_addrs(fixed_dev_addr); + } + } + //------------------------------------------------------------------ + device_addrs_t dev_addrs; + BOOST_FOREACH(const std::string &key, dev_addr.keys()){ + boost::cmatch matches; + if (not boost::regex_match(key.c_str(), matches, boost::regex("^(\\D+)(\\d*)$"))){ + throw std::runtime_error("unknown key format: " + key); + } + std::string key_part(matches[1].first, matches[1].second); + std::string num_part(matches[2].first, matches[2].second); + size_t num = (num_part.empty())? 0 : boost::lexical_cast<size_t>(num_part); + dev_addrs.resize(std::max(num+1, dev_addrs.size())); + dev_addrs[num][key_part] = dev_addr[key]; + } + return dev_addrs; +} + +//! combine a vector in device addresses into an indexed device address +device_addr_t combine_dev_addr_vector(const device_addrs_t &dev_addrs){ + device_addr_t dev_addr; + for (size_t i = 0; i < dev_addrs.size(); i++){ + BOOST_FOREACH(const std::string &key, dev_addrs[i].keys()){ + dev_addr[str(boost::format("%s%d") % key % i)] = dev_addrs[i][key]; + } + } + return dev_addr; +} + +/*********************************************************************** + * 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 = sep_indexed_dev_addrs(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 std::runtime_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_dev_addr_vector(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 = htonl(USRP2_FW_COMPAT_NUM); + ctrl_data_out.id = htonl(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"], num2str(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){ + + //setup the dsp transport hints (default to a large recv buff) + device_addr_t dsp_xport_hints = device_addr; + if (not dsp_xport_hints.has_key("recv_buff_size")){ + //set to half-a-second of buffering at max rate + dsp_xport_hints["recv_buff_size"] = "50e6"; + } + + //create a ctrl and data transport for each address + std::vector<udp_simple::sptr> ctrl_transports; + std::vector<zero_copy_if::sptr> data_transports; + std::vector<zero_copy_if::sptr> err0_transports; + const device_addrs_t device_addrs = sep_indexed_dev_addrs(device_addr); + + BOOST_FOREACH(const device_addr_t &dev_addr_i, device_addrs){ + ctrl_transports.push_back(udp_simple::make_connected( + dev_addr_i["addr"], num2str(USRP2_UDP_CTRL_PORT) + )); + data_transports.push_back(udp_zero_copy::make( + dev_addr_i["addr"], num2str(USRP2_UDP_DATA_PORT), dsp_xport_hints + )); + err0_transports.push_back(udp_zero_copy::make( + dev_addr_i["addr"], num2str(USRP2_UDP_ERR0_PORT), device_addr_t() + )); + } + + //create the usrp2 implementation guts + return device::sptr(new usrp2_impl( + ctrl_transports, data_transports, err0_transports, device_addrs + )); +} + +UHD_STATIC_BLOCK(register_usrp2_device){ + device::register_device(&usrp2_find, &usrp2_make); +} + +/*********************************************************************** + * Structors + **********************************************************************/ +usrp2_impl::usrp2_impl( + std::vector<udp_simple::sptr> ctrl_transports, + std::vector<zero_copy_if::sptr> data_transports, + std::vector<zero_copy_if::sptr> err0_transports, + const device_addrs_t &device_args +): + _data_transports(data_transports), + _err0_transports(err0_transports) +{ + //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++){ + _mboards.push_back(usrp2_mboard_impl::sptr(new usrp2_mboard_impl( + i, ctrl_transports[i], data_transports[i], + err0_transports[i], device_args[i], + this->get_max_recv_samps_per_packet() + ))); + //use an empty name when there is only one mboard + std::string name = (ctrl_transports.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(); +} |