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/* -*- c++ -*- */
/*
* Copyright 2007 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio 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, or (at your option)
* any later version.
*
* GNU Radio 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <usrp_rx.h>
#include <usrp_standard.h>
#include <iostream>
#include <vector>
#include <usb.h>
#include <mblock/class_registry.h>
#include <usrp_inband_usb_packet.h>
#include <fpga_regs_common.h>
#include <stdio.h>
#include <symbols_usrp_rx_cs.h>
typedef usrp_inband_usb_packet transport_pkt;
static const bool verbose = false;
bool usrp_rx_stop;
usrp_rx::usrp_rx(mb_runtime *rt, const std::string &instance_name, pmt_t user_arg)
: mb_mblock(rt, instance_name, user_arg),
d_disk_write(false),
d_disk_write_pkt(false) // if true, writes full packet, else just the payload
{
d_cs = define_port("cs", "usrp-rx-cs", true, mb_port::EXTERNAL);
if(d_disk_write) {
d_ofile0.open("rx_data_chan0.dat",std::ios::binary|std::ios::out);
d_ofile1.open("rx_data_chan1.dat",std::ios::binary|std::ios::out);
d_cs_ofile.open("rx_cs.dat",std::ios::binary|std::ios::out);
}
usrp_rx_stop = false;
}
usrp_rx::~usrp_rx()
{
if(d_disk_write) {
d_ofile0.close();
d_ofile1.close();
d_cs_ofile.close();
}
}
void
usrp_rx::initial_transition()
{
}
/*!
* \brief Handles incoming signals to to the m-block, wihch should only ever be
* a single message: cmd-usrrp-rx-start-reading. There is no signal to stop
* reading as the m-block goes in to a forever loop to read inband packets from
* the bus.
*/
void
usrp_rx::handle_message(mb_message_sptr msg)
{
pmt_t event = msg->signal();
pmt_t port_id = msg->port_id();
pmt_t data = msg->data();
// Theoretically only have 1 message to ever expect, but
// want to make sure its at least what we want
if(pmt_eq(port_id, d_cs->port_symbol())) {
if(pmt_eqv(event, s_cmd_usrp_rx_start_reading))
read_and_respond(data);
}
}
/*!
* \brief Performs the actual reading of data from the USB bus, called by
* handle_message() when a cmd-usrp-rx-start-reading signal is received.
*
* The method enters a forever loop where it continues to read data from the bus
* and generate read responses to the higher layer. Currently, shared memory is
* used to exit this loop.
*
* The \p data parameter is a PMT list which contains only a single element, an
* invocation handle which will be returned with all read respones.
*/
void
usrp_rx::read_and_respond(pmt_t data)
{
size_t ignore;
bool underrun;
unsigned int n_read;
unsigned int pkt_size = sizeof(transport_pkt);
pmt_t invocation_handle = pmt_nth(0, data);
// Need the handle to the RX port to send responses, this is passed
// by the USRP interface m-block
d_urx =
boost::any_cast<usrp_standard_rx *>(pmt_any_ref(pmt_nth(1, data)));
if(verbose)
std::cout << "[usrp_rx] Waiting for packets..\n";
// Read by 512 which is packet size and send them back up
while(!usrp_rx_stop) {
pmt_t v_pkt = pmt_make_u8vector(pkt_size, 0);
transport_pkt *pkt =
(transport_pkt *) pmt_u8vector_writable_elements(v_pkt, ignore);
n_read = d_urx->read(pkt, pkt_size, &underrun);
if(n_read != pkt_size) {
std::cerr << "[usrp_rx] Error reading packet, shutting down\n";
d_cs->send(s_response_usrp_rx_read,
pmt_list3(PMT_NIL, PMT_F, PMT_NIL));
return;
}
if(underrun && verbose && 0)
std::cout << "[usrp_rx] Underrun\n";
d_cs->send(s_response_usrp_rx_read,
pmt_list3(PMT_NIL, PMT_T, v_pkt));
if(verbose && 0)
std::cout << "[usrp_rx] Read 1 packet\n";
if(d_disk_write) {
if(pkt->chan() == CONTROL_CHAN)
d_cs_ofile.write((const char *)pkt, transport_pkt::max_pkt_size());
else {
if(d_disk_write_pkt) {
if(pkt->chan() == 0)
d_ofile0.write((const char *)pkt, transport_pkt::max_pkt_size());
else if(pkt->chan() == 1)
d_ofile1.write((const char *)pkt, transport_pkt::max_pkt_size());
} else {
if(pkt->chan() == 0)
d_ofile0.write((const char *)pkt->payload(), transport_pkt::max_payload());
else if(pkt->chan() == 1)
d_ofile1.write((const char *)pkt->payload(), transport_pkt::max_payload());
}
}
d_cs_ofile.flush();
d_ofile0.flush();
d_ofile1.flush();
}
}
usrp_rx_stop = false;
if(verbose) {
std::cout << "[USRP_RX] Stopping...\n";
fflush(stdout);
}
}
REGISTER_MBLOCK_CLASS(usrp_rx);
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