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//
// 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 "../../transport/vrt_packet_handler.hpp"
#include "usrp2_impl.hpp"
#include "usrp2_regs.hpp"
#include <uhd/utils/thread_priority.hpp>
#include <uhd/transport/convert_types.hpp>
#include <uhd/transport/bounded_buffer.hpp>
#include <boost/format.hpp>
#include <boost/asio.hpp> //htonl and ntohl
#include <boost/bind.hpp>
#include <boost/thread.hpp>
#include <iostream>
using namespace uhd;
using namespace uhd::usrp;
using namespace uhd::transport;
namespace asio = boost::asio;
/***********************************************************************
* io impl details (internal to this file)
**********************************************************************/
struct usrp2_impl::io_impl{
io_impl(zero_copy_if::sptr zc_if);
~io_impl(void);
managed_recv_buffer::sptr get_recv_buff(void);
//state management for the vrt packet handler code
vrt_packet_handler::recv_state packet_handler_recv_state;
vrt_packet_handler::send_state packet_handler_send_state;
//methods and variables for the recv pirate
void recv_pirate_loop(zero_copy_if::sptr zc_if);
boost::thread *recv_pirate_thread; bool recv_pirate_running;
bounded_buffer<managed_recv_buffer::sptr>::sptr recv_pirate_booty;
};
usrp2_impl::io_impl::io_impl(zero_copy_if::sptr zc_if){
//create a large enough booty
size_t num_frames = zc_if->get_num_recv_frames();
std::cout << "Recv pirate num frames: " << num_frames << std::endl;
recv_pirate_booty = bounded_buffer<managed_recv_buffer::sptr>::make(num_frames);
//create a new pirate thread (yarr!!)
recv_pirate_thread = new boost::thread(
boost::bind(&usrp2_impl::io_impl::recv_pirate_loop, this, zc_if)
);
}
usrp2_impl::io_impl::~io_impl(void){
recv_pirate_running = false;
recv_pirate_thread->interrupt();
recv_pirate_thread->join();
delete recv_pirate_thread;
}
managed_recv_buffer::sptr usrp2_impl::io_impl::get_recv_buff(void){
managed_recv_buffer::sptr buff;
boost::this_thread::disable_interruption di; //disable because the wait can throw
recv_pirate_booty->pop_with_timed_wait(buff, boost::posix_time::milliseconds(100));
return buff; //a timeout means that we return a null sptr...
}
void usrp2_impl::io_impl::recv_pirate_loop(zero_copy_if::sptr zc_if){
set_thread_priority_safe();
recv_pirate_running = true;
while(recv_pirate_running){
managed_recv_buffer::sptr buff = zc_if->get_recv_buff();
if (buff->size()) recv_pirate_booty->push_with_pop_on_full(buff);
}
}
/***********************************************************************
* Helper Functions
**********************************************************************/
void usrp2_impl::io_init(void){
//setup rx otw type
_rx_otw_type.width = 16;
_rx_otw_type.shift = 0;
_rx_otw_type.byteorder = otw_type_t::BO_BIG_ENDIAN;
//setup tx otw type
_tx_otw_type.width = 16;
_tx_otw_type.shift = 0;
_tx_otw_type.byteorder = otw_type_t::BO_BIG_ENDIAN;
//send a small data packet so the usrp2 knows the udp source port
managed_send_buffer::sptr send_buff = _data_transport->get_send_buff();
boost::uint32_t data = htonl(USRP2_INVALID_VRT_HEADER);
memcpy(send_buff->cast<void*>(), &data, sizeof(data));
send_buff->commit(sizeof(data));
//setup RX DSP regs
std::cout << "RX samples per packet: " << get_max_recv_samps_per_packet() << std::endl;
_iface->poke32(U2_REG_RX_CTRL_NSAMPS_PER_PKT, get_max_recv_samps_per_packet());
_iface->poke32(U2_REG_RX_CTRL_NCHANNELS, 1);
_iface->poke32(U2_REG_RX_CTRL_CLEAR_OVERRUN, 1); //reset
_iface->poke32(U2_REG_RX_CTRL_VRT_HEADER, 0
| (0x1 << 28) //if data with stream id
| (0x1 << 26) //has trailer
| (0x3 << 22) //integer time other
| (0x1 << 20) //fractional time sample count
);
_iface->poke32(U2_REG_RX_CTRL_VRT_STREAM_ID, 0);
_iface->poke32(U2_REG_RX_CTRL_VRT_TRAILER, 0);
std::cout << "TX samples per packet: " << get_max_send_samps_per_packet() << std::endl;
//create new io impl
_io_impl = UHD_PIMPL_MAKE(io_impl, (_data_transport));
}
/***********************************************************************
* Send Data
**********************************************************************/
size_t usrp2_impl::send(
const asio::const_buffer &buff,
const tx_metadata_t &metadata,
const io_type_t &io_type,
send_mode_t send_mode
){
return vrt_packet_handler::send(
_io_impl->packet_handler_send_state, //last state of the send handler
buff, metadata, send_mode, //buffer to empty and samples metadata
io_type, _tx_otw_type, //input and output types to convert
get_master_clock_freq(), //master clock tick rate
uhd::transport::vrt::pack_be,
boost::bind(&zero_copy_if::get_send_buff, _data_transport),
get_max_send_samps_per_packet()
);
}
/***********************************************************************
* Receive Data
**********************************************************************/
size_t usrp2_impl::recv(
const asio::mutable_buffer &buff,
rx_metadata_t &metadata,
const io_type_t &io_type,
recv_mode_t recv_mode
){
return vrt_packet_handler::recv(
_io_impl->packet_handler_recv_state, //last state of the recv handler
buff, metadata, recv_mode, //buffer to fill and samples metadata
io_type, _rx_otw_type, //input and output types to convert
get_master_clock_freq(), //master clock tick rate
uhd::transport::vrt::unpack_be,
boost::bind(&usrp2_impl::io_impl::get_recv_buff, _io_impl)
);
}
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