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//
// Copyright 2013 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 "usrp3_fw_ctrl_iface.hpp"
#include <uhd/utils/byteswap.hpp>
#include <uhd/utils/msg.hpp>
#include <uhd/exception.hpp>
#include <boost/format.hpp>
#include <boost/asio.hpp> //used for htonl and ntohl
#include <boost/foreach.hpp>
#include "fw_comm_protocol.h"
namespace uhd { namespace usrp { namespace usrp3 {
//----------------------------------------------------------
// Factory method
//----------------------------------------------------------
uhd::wb_iface::sptr usrp3_fw_ctrl_iface::make(
uhd::transport::udp_simple::sptr udp_xport,
boost::uint16_t product_id)
{
return wb_iface::sptr(new usrp3_fw_ctrl_iface(udp_xport, product_id));
}
//----------------------------------------------------------
// udp_fw_ctrl_iface
//----------------------------------------------------------
usrp3_fw_ctrl_iface::usrp3_fw_ctrl_iface(
uhd::transport::udp_simple::sptr udp_xport,
boost::uint16_t product_id) :
_product_id(product_id), _udp_xport(udp_xport), _seq_num(0)
{
flush();
peek32(0);
}
usrp3_fw_ctrl_iface::~usrp3_fw_ctrl_iface()
{
flush();
}
void usrp3_fw_ctrl_iface::flush()
{
boost::mutex::scoped_lock lock(_mutex);
_flush();
}
void usrp3_fw_ctrl_iface::poke32(const wb_addr_type addr, const boost::uint32_t data)
{
boost::mutex::scoped_lock lock(_mutex);
for (size_t i = 1; i <= NUM_RETRIES; i++) {
try {
_poke32(addr, data);
return;
} catch(const std::exception &ex) {
const std::string error_msg = str(boost::format(
"udp fw poke32 failure #%u\n%s") % i % ex.what());
UHD_MSG(warning) << error_msg << std::endl;
if (i == NUM_RETRIES) throw uhd::io_error(error_msg);
}
}
}
boost::uint32_t usrp3_fw_ctrl_iface::peek32(const wb_addr_type addr)
{
boost::mutex::scoped_lock lock(_mutex);
for (size_t i = 1; i <= NUM_RETRIES; i++) {
try {
return _peek32(addr);
} catch(const std::exception &ex) {
const std::string error_msg = str(boost::format(
"udp fw peek32 failure #%u\n%s") % i % ex.what());
UHD_MSG(warning) << error_msg << std::endl;
if (i == NUM_RETRIES) throw uhd::io_error(error_msg);
}
}
return 0;
}
void usrp3_fw_ctrl_iface::_poke32(const wb_addr_type addr, const boost::uint32_t data)
{
//Load request struct
fw_comm_pkt_t request;
request.id = uhd::htonx<boost::uint32_t>(FW_COMM_GENERATE_ID(_product_id));
request.flags = uhd::htonx<boost::uint32_t>(FW_COMM_FLAGS_ACK | FW_COMM_CMD_POKE32);
request.sequence = uhd::htonx<boost::uint32_t>(_seq_num++);
request.addr = uhd::htonx(addr);
request.data_words = 1;
request.data[0] = uhd::htonx(data);
//Send request
_flush();
_udp_xport->send(boost::asio::buffer(&request, sizeof(request)));
//Recv reply
fw_comm_pkt_t reply;
const size_t nbytes = _udp_xport->recv(boost::asio::buffer(&reply, sizeof(reply)), 1.0);
if (nbytes == 0) throw uhd::io_error("udp fw poke32 - reply timed out");
//Sanity checks
const size_t flags = uhd::ntohx<boost::uint32_t>(reply.flags);
UHD_ASSERT_THROW(nbytes == sizeof(reply));
UHD_ASSERT_THROW(not (flags & FW_COMM_FLAGS_ERROR_MASK));
UHD_ASSERT_THROW(flags & FW_COMM_CMD_POKE32);
UHD_ASSERT_THROW(flags & FW_COMM_FLAGS_ACK);
UHD_ASSERT_THROW(reply.sequence == request.sequence);
UHD_ASSERT_THROW(reply.addr == request.addr);
UHD_ASSERT_THROW(reply.data[0] == request.data[0]);
}
boost::uint32_t usrp3_fw_ctrl_iface::_peek32(const wb_addr_type addr)
{
//Load request struct
fw_comm_pkt_t request;
request.id = uhd::htonx<boost::uint32_t>(FW_COMM_GENERATE_ID(_product_id));
request.flags = uhd::htonx<boost::uint32_t>(FW_COMM_FLAGS_ACK | FW_COMM_CMD_PEEK32);
request.sequence = uhd::htonx<boost::uint32_t>(_seq_num++);
request.addr = uhd::htonx(addr);
request.data_words = 1;
request.data[0] = 0;
//Send request
_flush();
_udp_xport->send(boost::asio::buffer(&request, sizeof(request)));
//Recv reply
fw_comm_pkt_t reply;
const size_t nbytes = _udp_xport->recv(boost::asio::buffer(&reply, sizeof(reply)), 1.0);
if (nbytes == 0) throw uhd::io_error("udp fw peek32 - reply timed out");
//Sanity checks
const size_t flags = uhd::ntohx<boost::uint32_t>(reply.flags);
UHD_ASSERT_THROW(nbytes == sizeof(reply));
UHD_ASSERT_THROW(not (flags & FW_COMM_FLAGS_ERROR_MASK));
UHD_ASSERT_THROW(flags & FW_COMM_CMD_PEEK32);
UHD_ASSERT_THROW(flags & FW_COMM_FLAGS_ACK);
UHD_ASSERT_THROW(reply.sequence == request.sequence);
UHD_ASSERT_THROW(reply.addr == request.addr);
//return result!
return uhd::ntohx<boost::uint32_t>(reply.data[0]);
}
void usrp3_fw_ctrl_iface::_flush(void)
{
char buff[FW_COMM_PROTOCOL_MTU] = {};
while (_udp_xport->recv(boost::asio::buffer(buff), 0.0)) {
/*NOP*/
}
}
std::vector<std::string> usrp3_fw_ctrl_iface::discover_devices(
const std::string& addr_hint, const std::string& port,
boost::uint16_t product_id)
{
std::vector<std::string> addrs;
//Create a UDP transport to communicate:
//Some devices will cause a throw when opened for a broadcast address.
//We print and recover so the caller can loop through all bcast addrs.
uhd::transport::udp_simple::sptr udp_bcast_xport;
try {
udp_bcast_xport = uhd::transport::udp_simple::make_broadcast(addr_hint, port);
} catch(const std::exception &e) {
UHD_MSG(error) << boost::format("Cannot open UDP transport on %s for discovery\n%s")
% addr_hint % e.what() << std::endl;
return addrs;
}
//Send dummy request
fw_comm_pkt_t request;
request.id = uhd::htonx<boost::uint32_t>(FW_COMM_GENERATE_ID(product_id));
request.flags = uhd::htonx<boost::uint32_t>(FW_COMM_FLAGS_ACK|FW_COMM_CMD_ECHO);
request.sequence = uhd::htonx<boost::uint32_t>(std::rand());
udp_bcast_xport->send(boost::asio::buffer(&request, sizeof(request)));
//loop for replies until timeout
while (true) {
char buff[FW_COMM_PROTOCOL_MTU] = {};
const size_t nbytes = udp_bcast_xport->recv(boost::asio::buffer(buff), 0.050);
if (nbytes != sizeof(fw_comm_pkt_t)) break; //No more responses or responses are invalid
const fw_comm_pkt_t *reply = (const fw_comm_pkt_t *)buff;
if (request.id == reply->id &&
request.flags == reply->flags &&
request.sequence == reply->sequence)
{
addrs.push_back(udp_bcast_xport->get_recv_addr());
}
}
return addrs;
}
boost::uint32_t usrp3_fw_ctrl_iface::get_iface_id(
const std::string& addr, const std::string& port,
boost::uint16_t product_id)
{
uhd::transport::udp_simple::sptr udp_xport =
uhd::transport::udp_simple::make_connected(addr, port);
//Send dummy request
fw_comm_pkt_t request;
request.id = uhd::htonx<boost::uint32_t>(FW_COMM_GENERATE_ID(product_id));
request.flags = uhd::htonx<boost::uint32_t>(FW_COMM_FLAGS_ACK|FW_COMM_CMD_ECHO);
request.sequence = uhd::htonx<boost::uint32_t>(std::rand());
udp_xport->send(boost::asio::buffer(&request, sizeof(request)));
//loop for replies until timeout
char buff[FW_COMM_PROTOCOL_MTU] = {};
const size_t nbytes = udp_xport->recv(boost::asio::buffer(buff), 1.0);
const fw_comm_pkt_t *reply = (const fw_comm_pkt_t *)buff;
if (nbytes > 0 &&
request.id == reply->id &&
request.flags == reply->flags &&
request.sequence == reply->sequence)
{
return uhd::ntohx<boost::uint32_t>(reply->data[0]);
} else {
throw uhd::io_error("udp get_iface_id - bad response");
}
}
}}} //namespace
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