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/*
* Copyright 2008, 2009, 2010 Free Software Foundation, Inc.
* Copyright 2010 Kestrel Signal Processing, Inc.
*
* This software is distributed under the terms of the GNU Affero Public License.
* See the COPYING file in the main directory for details.
*
* This use of this software may be subject to additional restrictions.
* See the LEGAL file in the main directory for details.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "Transceiver.h"
#include "radioDevice.h"
#include "DummyLoad.h"
#include <fstream>
#include <time.h>
#include <signal.h>
#include <GSMCommon.h>
#include <Logger.h>
#include <Configuration.h>
#define CONFIGDB "/etc/OpenBTS/OpenBTS.db"
using namespace std;
ConfigurationTable gConfig(CONFIGDB);
volatile bool gbShutdown = false;
static void ctrlCHandler(int signo)
{
cout << "Received shutdown signal" << endl;;
gbShutdown = true;
}
/*
* Attempt to open and test the database file before
* accessing the configuration table. We do this because
* the global table constructor cannot provide notification
* in the event of failure.
*/
int testConfig(const char *filename)
{
int rc, val = 9999;
bool status;
sqlite3 *db;
std::string result;
std::string test = "sadf732zdvj2";
const char *keys[3] = {
"Log.Level",
"TRX.Port",
"TRX.IP",
};
/* Check for file existence */
std::ifstream file(filename);
if (!file.good()) {
std::cerr << "Config: File not readable \""
<< filename << "\"" << std::endl;
return -1;
} else {
file.close();
}
/* Try to open the database */
rc = sqlite3_open(filename, &db);
if (rc || !db) {
std::cerr << "Config: Database could not be opened" << std::endl;
return -1;
} else {
sqlite3_close(db);
}
/* Attempt to set a value in the global config */
if (!gConfig.set(test, val)) {
std::cerr << "Config: Failed to set test key - "
<< "permission to access the database?" << std::endl;
return -1;
} else {
gConfig.remove(test);
}
/* Attempt to query */
for (int i = 0; i < 3; i++) {
try {
result = gConfig.getStr(keys[i]);
} catch (...) {
std::cerr << "Config: Failed query on " << keys[i] << std::endl;
return -1;
}
}
return 0;
}
int main(int argc, char *argv[])
{
int trxPort;
std::string deviceArgs, logLevel, trxAddr, txAntenna, rxAntenna;
RadioDevice *usrp;
RadioInterface* radio;
DriveLoop *drive;
Transceiver *trx;
if (argc == 3)
{
deviceArgs = std::string(argv[2]);
}
else
{
deviceArgs = "";
}
if ( signal( SIGINT, ctrlCHandler ) == SIG_ERR )
{
cerr << "Couldn't install signal handler for SIGINT" << endl;
exit(1);
}
if ( signal( SIGTERM, ctrlCHandler ) == SIG_ERR )
{
cerr << "Couldn't install signal handler for SIGTERM" << endl;
exit(1);
}
// Configure logger.
if (testConfig(CONFIGDB) < 0) {
std::cerr << "Config: Database failure" << std::endl;
return EXIT_FAILURE;
}
logLevel = gConfig.getStr("Log.Level");
trxPort = gConfig.getNum("TRX.Port");
trxAddr = gConfig.getStr("TRX.IP");
gLogInit("transceiver", logLevel.c_str(), LOG_LOCAL7);
if (gConfig.defines("GSM.Radio.TxAntenna"))
txAntenna = gConfig.getStr("GSM.Radio.TxAntenna").c_str();
if (gConfig.defines("GSM.Radio.RxAntenna"))
rxAntenna = gConfig.getStr("GSM.Radio.RxAntenna").c_str();
if (txAntenna != "")
usrp->setTxAntenna(txAntenna);
if (rxAntenna != "")
usrp->setRxAntenna(rxAntenna);
LOG(INFO) << "transceiver using transmit antenna " << usrp->getRxAntenna();
LOG(INFO) << "transceiver using receive antenna " << usrp->getTxAntenna();
srandom(time(NULL));
usrp = RadioDevice::make(SAMPSPERSYM);
int radioType = usrp->open(deviceArgs);
if (radioType < 0) {
LOG(ALERT) << "Transceiver exiting..." << std::endl;
return EXIT_FAILURE;
}
switch (radioType) {
case RadioDevice::NORMAL:
radio = new RadioInterface(usrp, 3, SAMPSPERSYM, false);
break;
case RadioDevice::RESAMP:
default:
LOG(ALERT) << "Unsupported configuration";
return EXIT_FAILURE;
}
drive = new DriveLoop(SAMPSPERSYM, GSM::Time(3,0), radio);
if (!drive->init()) {
LOG(ALERT) << "Failed to initialize drive loop";
}
trx = new Transceiver(trxPort, trxAddr.c_str(), SAMPSPERSYM, radio, drive, 0);
radio->activateChan(0);
if (!trx->init()) {
LOG(ALERT) << "Failed to initialize transceiver";
}
/*
signalVector *gsmPulse = generateGSMPulse(2,1);
BitVector normalBurstSeg = "0000101010100111110010101010010110101110011000111001101010000";
BitVector normalBurst(BitVector(normalBurstSeg,gTrainingSequence[0]),normalBurstSeg);
signalVector *modBurst = modulateBurst(normalBurst,*gsmPulse,8,1);
signalVector *modBurst9 = modulateBurst(normalBurst,*gsmPulse,9,1);
signalVector *interpolationFilter = createLPF(0.6/mOversamplingRate,6*mOversamplingRate,1);
signalVector totalBurst1(*modBurst,*modBurst9);
signalVector totalBurst2(*modBurst,*modBurst);
signalVector totalBurst(totalBurst1,totalBurst2);
scaleVector(totalBurst,usrp->fullScaleInputValue());
double beaconFreq = -1.0*(numARFCN-1)*200e3;
signalVector finalVec(625*mOversamplingRate);
for (int j = 0; j < numARFCN; j++) {
signalVector *frequencyShifter = new signalVector(625*mOversamplingRate);
frequencyShifter->fill(1.0);
frequencyShift(frequencyShifter,frequencyShifter,2.0*M_PI*(beaconFreq+j*400e3)/(1625.0e3/6.0*mOversamplingRate));
signalVector *interpVec = polyphaseResampleVector(totalBurst,mOversamplingRate,1,interpolationFilter);
multVector(*interpVec,*frequencyShifter);
addVector(finalVec,*interpVec);
}
signalVector::iterator itr = finalVec.begin();
short finalVecShort[2*finalVec.size()];
short *shortItr = finalVecShort;
while (itr < finalVec.end()) {
*shortItr++ = (short) (itr->real());
*shortItr++ = (short) (itr->imag());
itr++;
}
usrp->loadBurst(finalVecShort,finalVec.size());
*/
trx->start();
while(!gbShutdown) { sleep(1); }//i++; if (i==60) break;}
cout << "Shutting down transceiver..." << endl;
trx->shutdown();
delete trx;
delete drive;
delete radio;
}
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