mirror of https://gerrit.osmocom.org/libusrp
375 lines
10 KiB
C++
375 lines
10 KiB
C++
/* -*- c++ -*- */
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/*
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* Copyright 2007,2008 Free Software Foundation, Inc.
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*
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* This file is part of GNU Radio
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*
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* GNU Radio is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* GNU Radio is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <mblock/mblock.h>
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#include <mblock/runtime.h>
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#include <mblock/protocol_class.h>
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#include <mblock/exception.h>
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#include <mblock/msg_queue.h>
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#include <mblock/message.h>
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#include <mblock/msg_accepter.h>
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#include <mblock/class_registry.h>
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#include <pmt.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/time.h>
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#include <iostream>
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// Include the symbols needed for communication with USRP server
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#include <symbols_usrp_server_cs.h>
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#include <symbols_usrp_channel.h>
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#include <symbols_usrp_low_level_cs.h>
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#include <symbols_usrp_tx.h>
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#include <symbols_usrp_rx.h>
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static bool verbose = false;
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class test_usrp_inband_ping : public mb_mblock
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{
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mb_port_sptr d_tx; // Ports connected to the USRP server
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mb_port_sptr d_rx;
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mb_port_sptr d_cs;
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pmt_t d_tx_chan; // Returned channel from TX allocation
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pmt_t d_rx_chan; // Returned channel from RX allocation
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pmt_t d_which_usrp; // The USRP to use for the test
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long d_warm_msgs; // The number of messages to 'warm' the USRP
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long d_warm_recvd; // The number of msgs received in the 'warm' state
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// Keep track of current state
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enum state_t {
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INIT,
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OPENING_USRP,
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ALLOCATING_CHANNELS,
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WARMING_USRP,
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PINGING,
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CLOSING_CHANNELS,
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CLOSING_USRP,
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};
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state_t d_state;
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public:
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test_usrp_inband_ping(mb_runtime *runtime, const std::string &instance_name, pmt_t user_arg);
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~test_usrp_inband_ping();
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void initial_transition();
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void handle_message(mb_message_sptr msg);
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protected:
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void opening_usrp();
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void allocating_channels();
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void enter_warming_usrp();
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void enter_pinging();
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void build_and_send_ping();
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void closing_channels();
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void closing_usrp();
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};
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int
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main (int argc, char **argv)
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{
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// handle any command line args here
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mb_runtime_sptr rt = mb_make_runtime();
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pmt_t result = PMT_NIL;
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rt->run("top", "test_usrp_inband_ping", PMT_F, &result);
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}
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test_usrp_inband_ping::test_usrp_inband_ping(mb_runtime *runtime, const std::string &instance_name, pmt_t user_arg)
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: mb_mblock(runtime, instance_name, user_arg),
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d_tx_chan(PMT_NIL),
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d_rx_chan(PMT_NIL),
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d_which_usrp(pmt_from_long(0)),
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d_state(INIT)
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{
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// A dictionary is used to pass parameters to the USRP
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pmt_t usrp_dict = pmt_make_dict();
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// Specify the RBF to use
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pmt_dict_set(usrp_dict,
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pmt_intern("rbf"),
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pmt_intern("fixed1.rbf"));
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// Set TX and RX interpolations
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pmt_dict_set(usrp_dict,
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pmt_intern("interp-tx"),
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pmt_from_long(128));
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pmt_dict_set(usrp_dict,
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pmt_intern("decim-rx"),
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pmt_from_long(16));
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d_tx = define_port("tx0", "usrp-tx", false, mb_port::INTERNAL);
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d_rx = define_port("rx0", "usrp-rx", false, mb_port::INTERNAL);
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d_cs = define_port("cs", "usrp-server-cs", false, mb_port::INTERNAL);
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// Create an instance of USRP server and connect ports
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define_component("server", "usrp_server", usrp_dict);
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connect("self", "tx0", "server", "tx0");
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connect("self", "rx0", "server", "rx0");
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connect("self", "cs", "server", "cs");
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}
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test_usrp_inband_ping::~test_usrp_inband_ping()
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{
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}
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void
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test_usrp_inband_ping::initial_transition()
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{
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opening_usrp();
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}
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// Handle message reads all incoming messages from USRP server which will be
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// initialization and ping responses. We perform actions based on the current
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// state and the event (ie, ping response)
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void
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test_usrp_inband_ping::handle_message(mb_message_sptr msg)
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{
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pmt_t event = msg->signal();
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pmt_t data = msg->data();
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pmt_t port_id = msg->port_id();
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pmt_t handle = PMT_F;
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pmt_t status = PMT_F;
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std::string error_msg;
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// Dispatch based on state
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switch(d_state) {
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//----------------------------- OPENING_USRP ----------------------------//
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// We only expect a response from opening the USRP which should be succesful
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// or failed.
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case OPENING_USRP:
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if(pmt_eq(event, s_response_open)) {
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status = pmt_nth(1, data); // failed/succes
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if(pmt_eq(status, PMT_T)) {
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allocating_channels();
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return;
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}
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else {
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error_msg = "failed to open usrp:";
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goto bail;
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}
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}
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goto unhandled; // all other messages not handled in this state
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//----------------------- ALLOCATING CHANNELS --------------------//
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// When allocating channels, we need to wait for 2 responses from
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// USRP server: one for TX and one for RX. Both are initialized to
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// NIL so we know to continue to the next state once both are set.
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case ALLOCATING_CHANNELS:
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// A TX allocation response
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if(pmt_eq(event, s_response_allocate_channel)
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&& pmt_eq(d_tx->port_symbol(), port_id))
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{
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status = pmt_nth(1, data);
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// If successful response, extract the channel
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if(pmt_eq(status, PMT_T)) {
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d_tx_chan = pmt_nth(2, data);
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if(verbose)
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std::cout << "[TEST_USRP_INBAND_PING] Received TX allocation"
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<< " on channel " << d_tx_chan << std::endl;
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// If the RX has also been allocated already, we can continue
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if(!pmt_eqv(d_rx_chan, PMT_NIL))
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enter_warming_usrp();
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return;
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}
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else { // TX allocation failed
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error_msg = "failed to allocate TX channel:";
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goto bail;
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}
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}
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// A RX allocation response
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if(pmt_eq(event, s_response_allocate_channel)
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&& pmt_eq(d_rx->port_symbol(), port_id))
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{
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status = pmt_nth(1, data);
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// If successful response, extract the channel
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if(pmt_eq(status, PMT_T)) {
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d_rx_chan = pmt_nth(2, data);
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if(verbose)
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std::cout << "[TEST_USRP_INBAND_PING] Received RX allocation"
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<< " on channel " << d_rx_chan << std::endl;
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// If the TX has also been allocated already, we can continue
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if(!pmt_eqv(d_tx_chan, PMT_NIL))
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enter_warming_usrp();
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return;
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}
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else { // RX allocation failed
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error_msg = "failed to allocate RX channel:";
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goto bail;
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}
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}
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goto unhandled;
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//----------------------- WARMING USRP --------------------//
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// The FX2 seems to need some amount of data to be buffered
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// before it begins reading. We use this state to simply
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// warm up the USRP before benchmarking pings.
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case WARMING_USRP:
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// We really don't care about the responses from the
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// control channel in the warming stage, but once we receive
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// the proper number of responses we switch states.
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if(pmt_eq(event, s_response_from_control_channel)
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&& pmt_eq(d_rx->port_symbol(), port_id))
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{
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d_warm_recvd++;
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if(d_warm_recvd > d_warm_msgs)
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enter_pinging();
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return;
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}
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goto unhandled;
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case PINGING:
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goto unhandled;
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case CLOSING_CHANNELS:
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goto unhandled;
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case CLOSING_USRP:
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goto unhandled;
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case INIT:
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goto unhandled;
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}
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// An error occured, print it, and shutdown all m-blocks
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bail:
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std::cerr << error_msg << data
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<< "status = " << status << std::endl;
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shutdown_all(PMT_F);
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return;
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// Received an unhandled message for a specific state
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unhandled:
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if(verbose)
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std::cout << "test_usrp_inband_tx: unhandled msg: " << msg
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<< "in state "<< d_state << std::endl;
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}
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// Sends a command to USRP server to open up a connection to the
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// specified USRP, which is defaulted to USRP 0 on the system
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void
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test_usrp_inband_ping::opening_usrp()
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{
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if(verbose)
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std::cout << "[TEST_USRP_INBAND_PING] Opening USRP "
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<< d_which_usrp << std::endl;
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d_cs->send(s_cmd_open, pmt_list2(PMT_NIL, d_which_usrp));
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d_state = OPENING_USRP;
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}
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// RX and TX channels must be allocated so that the USRP server can
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// properly share bandwidth across multiple USRPs. No commands will be
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// successful to the USRP through the USRP server on the TX or RX channels until
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// a bandwidth allocation has been received.
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void
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test_usrp_inband_ping::allocating_channels()
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{
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d_state = ALLOCATING_CHANNELS;
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long capacity = (long) 16e6;
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d_tx->send(s_cmd_allocate_channel, pmt_list2(PMT_T, pmt_from_long(capacity)));
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d_rx->send(s_cmd_allocate_channel, pmt_list2(PMT_T, pmt_from_long(capacity)));
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}
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// The USRP needs some amount of initial data to pass a buffering point such
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// that it begins to pull and read data from the FX2. We send an arbitrary
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// amount of data to start the pipeline, which are just pings.
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void
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test_usrp_inband_ping::enter_warming_usrp()
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{
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d_state = WARMING_USRP;
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for(int i=0; i < d_warm_msgs; i++)
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build_and_send_ping();
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}
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void
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test_usrp_inband_ping::enter_pinging()
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{
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d_state = PINGING;
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if(verbose)
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std::cout << "[TEST_USRP_INBAND_PING] Running ping tests\n";
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}
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// Pings are sent over the TX channel using the signal 'cmd-to-control-channel'
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// to the USRP server. Within this message there can be infinite subpackets
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// stored as a list (the second parameter) and sent. The only subpacket we send
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// is a ping, interpreted by the 'op-ping-fixed' signal.
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void
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test_usrp_inband_ping::build_and_send_ping()
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{
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d_tx->send(s_cmd_to_control_channel, // USRP server signal
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pmt_list2(PMT_NIL, // invocation handle
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pmt_list1(pmt_list3(s_op_ping_fixed,
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pmt_from_long(0),
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pmt_from_long(0)))));
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if(verbose)
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std::cout << "[TEST_USRP_INBAND_PING] Ping!!" << std::endl;
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}
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REGISTER_MBLOCK_CLASS(test_usrp_inband_ping);
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