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libusrp/limbo/apps-inband/test_usrp_inband_ping.cc

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/* -*- c++ -*- */
/*
* Copyright 2007,2008 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 <mblock/mblock.h>
#include <mblock/runtime.h>
#include <mblock/protocol_class.h>
#include <mblock/exception.h>
#include <mblock/msg_queue.h>
#include <mblock/message.h>
#include <mblock/msg_accepter.h>
#include <mblock/class_registry.h>
#include <pmt.h>
#include <stdio.h>
#include <string.h>
#include <sys/time.h>
#include <iostream>
// Include the symbols needed for communication with USRP server
#include <symbols_usrp_server_cs.h>
#include <symbols_usrp_channel.h>
#include <symbols_usrp_low_level_cs.h>
#include <symbols_usrp_tx.h>
#include <symbols_usrp_rx.h>
static bool verbose = false;
class test_usrp_inband_ping : public mb_mblock
{
mb_port_sptr d_tx; // Ports connected to the USRP server
mb_port_sptr d_rx;
mb_port_sptr d_cs;
pmt_t d_tx_chan; // Returned channel from TX allocation
pmt_t d_rx_chan; // Returned channel from RX allocation
pmt_t d_which_usrp; // The USRP to use for the test
long d_warm_msgs; // The number of messages to 'warm' the USRP
long d_warm_recvd; // The number of msgs received in the 'warm' state
// Keep track of current state
enum state_t {
INIT,
OPENING_USRP,
ALLOCATING_CHANNELS,
WARMING_USRP,
PINGING,
CLOSING_CHANNELS,
CLOSING_USRP,
};
state_t d_state;
public:
test_usrp_inband_ping(mb_runtime *runtime, const std::string &instance_name, pmt_t user_arg);
~test_usrp_inband_ping();
void initial_transition();
void handle_message(mb_message_sptr msg);
protected:
void opening_usrp();
void allocating_channels();
void enter_warming_usrp();
void enter_pinging();
void build_and_send_ping();
void closing_channels();
void closing_usrp();
};
int
main (int argc, char **argv)
{
// handle any command line args here
mb_runtime_sptr rt = mb_make_runtime();
pmt_t result = PMT_NIL;
rt->run("top", "test_usrp_inband_ping", PMT_F, &result);
}
test_usrp_inband_ping::test_usrp_inband_ping(mb_runtime *runtime, const std::string &instance_name, pmt_t user_arg)
: mb_mblock(runtime, instance_name, user_arg),
d_tx_chan(PMT_NIL),
d_rx_chan(PMT_NIL),
d_which_usrp(pmt_from_long(0)),
d_state(INIT)
{
// A dictionary is used to pass parameters to the USRP
pmt_t usrp_dict = pmt_make_dict();
// Specify the RBF to use
pmt_dict_set(usrp_dict,
pmt_intern("rbf"),
pmt_intern("fixed1.rbf"));
// Set TX and RX interpolations
pmt_dict_set(usrp_dict,
pmt_intern("interp-tx"),
pmt_from_long(128));
pmt_dict_set(usrp_dict,
pmt_intern("decim-rx"),
pmt_from_long(16));
d_tx = define_port("tx0", "usrp-tx", false, mb_port::INTERNAL);
d_rx = define_port("rx0", "usrp-rx", false, mb_port::INTERNAL);
d_cs = define_port("cs", "usrp-server-cs", false, mb_port::INTERNAL);
// Create an instance of USRP server and connect ports
define_component("server", "usrp_server", usrp_dict);
connect("self", "tx0", "server", "tx0");
connect("self", "rx0", "server", "rx0");
connect("self", "cs", "server", "cs");
}
test_usrp_inband_ping::~test_usrp_inband_ping()
{
}
void
test_usrp_inband_ping::initial_transition()
{
opening_usrp();
}
// Handle message reads all incoming messages from USRP server which will be
// initialization and ping responses. We perform actions based on the current
// state and the event (ie, ping response)
void
test_usrp_inband_ping::handle_message(mb_message_sptr msg)
{
pmt_t event = msg->signal();
pmt_t data = msg->data();
pmt_t port_id = msg->port_id();
pmt_t handle = PMT_F;
pmt_t status = PMT_F;
std::string error_msg;
// Dispatch based on state
switch(d_state) {
//----------------------------- OPENING_USRP ----------------------------//
// We only expect a response from opening the USRP which should be succesful
// or failed.
case OPENING_USRP:
if(pmt_eq(event, s_response_open)) {
status = pmt_nth(1, data); // failed/succes
if(pmt_eq(status, PMT_T)) {
allocating_channels();
return;
}
else {
error_msg = "failed to open usrp:";
goto bail;
}
}
goto unhandled; // all other messages not handled in this state
//----------------------- ALLOCATING CHANNELS --------------------//
// When allocating channels, we need to wait for 2 responses from
// USRP server: one for TX and one for RX. Both are initialized to
// NIL so we know to continue to the next state once both are set.
case ALLOCATING_CHANNELS:
// A TX allocation response
if(pmt_eq(event, s_response_allocate_channel)
&& pmt_eq(d_tx->port_symbol(), port_id))
{
status = pmt_nth(1, data);
// If successful response, extract the channel
if(pmt_eq(status, PMT_T)) {
d_tx_chan = pmt_nth(2, data);
if(verbose)
std::cout << "[TEST_USRP_INBAND_PING] Received TX allocation"
<< " on channel " << d_tx_chan << std::endl;
// If the RX has also been allocated already, we can continue
if(!pmt_eqv(d_rx_chan, PMT_NIL))
enter_warming_usrp();
return;
}
else { // TX allocation failed
error_msg = "failed to allocate TX channel:";
goto bail;
}
}
// A RX allocation response
if(pmt_eq(event, s_response_allocate_channel)
&& pmt_eq(d_rx->port_symbol(), port_id))
{
status = pmt_nth(1, data);
// If successful response, extract the channel
if(pmt_eq(status, PMT_T)) {
d_rx_chan = pmt_nth(2, data);
if(verbose)
std::cout << "[TEST_USRP_INBAND_PING] Received RX allocation"
<< " on channel " << d_rx_chan << std::endl;
// If the TX has also been allocated already, we can continue
if(!pmt_eqv(d_tx_chan, PMT_NIL))
enter_warming_usrp();
return;
}
else { // RX allocation failed
error_msg = "failed to allocate RX channel:";
goto bail;
}
}
goto unhandled;
//----------------------- WARMING USRP --------------------//
// The FX2 seems to need some amount of data to be buffered
// before it begins reading. We use this state to simply
// warm up the USRP before benchmarking pings.
case WARMING_USRP:
// We really don't care about the responses from the
// control channel in the warming stage, but once we receive
// the proper number of responses we switch states.
if(pmt_eq(event, s_response_from_control_channel)
&& pmt_eq(d_rx->port_symbol(), port_id))
{
d_warm_recvd++;
if(d_warm_recvd > d_warm_msgs)
enter_pinging();
return;
}
goto unhandled;
case PINGING:
goto unhandled;
case CLOSING_CHANNELS:
goto unhandled;
case CLOSING_USRP:
goto unhandled;
case INIT:
goto unhandled;
}
// An error occured, print it, and shutdown all m-blocks
bail:
std::cerr << error_msg << data
<< "status = " << status << std::endl;
shutdown_all(PMT_F);
return;
// Received an unhandled message for a specific state
unhandled:
if(verbose)
std::cout << "test_usrp_inband_tx: unhandled msg: " << msg
<< "in state "<< d_state << std::endl;
}
// Sends a command to USRP server to open up a connection to the
// specified USRP, which is defaulted to USRP 0 on the system
void
test_usrp_inband_ping::opening_usrp()
{
if(verbose)
std::cout << "[TEST_USRP_INBAND_PING] Opening USRP "
<< d_which_usrp << std::endl;
d_cs->send(s_cmd_open, pmt_list2(PMT_NIL, d_which_usrp));
d_state = OPENING_USRP;
}
// RX and TX channels must be allocated so that the USRP server can
// properly share bandwidth across multiple USRPs. No commands will be
// successful to the USRP through the USRP server on the TX or RX channels until
// a bandwidth allocation has been received.
void
test_usrp_inband_ping::allocating_channels()
{
d_state = ALLOCATING_CHANNELS;
long capacity = (long) 16e6;
d_tx->send(s_cmd_allocate_channel, pmt_list2(PMT_T, pmt_from_long(capacity)));
d_rx->send(s_cmd_allocate_channel, pmt_list2(PMT_T, pmt_from_long(capacity)));
}
// The USRP needs some amount of initial data to pass a buffering point such
// that it begins to pull and read data from the FX2. We send an arbitrary
// amount of data to start the pipeline, which are just pings.
void
test_usrp_inband_ping::enter_warming_usrp()
{
d_state = WARMING_USRP;
for(int i=0; i < d_warm_msgs; i++)
build_and_send_ping();
}
void
test_usrp_inband_ping::enter_pinging()
{
d_state = PINGING;
if(verbose)
std::cout << "[TEST_USRP_INBAND_PING] Running ping tests\n";
}
// Pings are sent over the TX channel using the signal 'cmd-to-control-channel'
// to the USRP server. Within this message there can be infinite subpackets
// stored as a list (the second parameter) and sent. The only subpacket we send
// is a ping, interpreted by the 'op-ping-fixed' signal.
void
test_usrp_inband_ping::build_and_send_ping()
{
d_tx->send(s_cmd_to_control_channel, // USRP server signal
pmt_list2(PMT_NIL, // invocation handle
pmt_list1(pmt_list3(s_op_ping_fixed,
pmt_from_long(0),
pmt_from_long(0)))));
if(verbose)
std::cout << "[TEST_USRP_INBAND_PING] Ping!!" << std::endl;
}
REGISTER_MBLOCK_CLASS(test_usrp_inband_ping);
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