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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 <time.h>
#include <signal.h>
#include <GSMCommon.h>
#include <Logger.h>
#include <Configuration.h>
#define CONFIGDB "/etc/OpenBTS/OpenBTS.db"
/* Samples-per-symbol for downlink path
* 4 - Uses precision modulator (more computation, less distortion)
* 1 - Uses minimized modulator (less computation, more distortion)
*
* Other values are invalid. Receive path (uplink) is always
* downsampled to 1 sps
*/
#define SPS 4
ConfigurationTable gConfig(CONFIGDB);
volatile bool gbShutdown = false;
static void ctrlCHandler(int signo)
{
std::cout << "Received shutdown signal" << std::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;
sqlite3 *db;
std::string test = "sadf732zdvj2";
const char *keys[3] = {
"Log.Level",
"TRX.Port",
"TRX.IP",
};
/* 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 {
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, radioType, chans = 1, extref = 0, fail = 0;
std::string logLevel, trxAddr, deviceArgs = "";
RadioDevice *usrp = NULL;
RadioInterface *radio = NULL;
Transceiver *trx = NULL;
VectorFIFO *fifo = NULL;
if (argc == 3) {
deviceArgs = std::string(argv[2]);
chans = atoi(argv[1]);
} else if (argc == 2) {
chans = atoi(argv[1]);
} else if (argc != 1) {
std::cout << argv[0] << " <number of channels> <device args>" << std::endl;
}
if (signal(SIGINT, ctrlCHandler) == SIG_ERR) {
std::cerr << "Couldn't install signal handler for SIGINT" << std::endl;
return EXIT_FAILURE;
}
if (signal(SIGTERM, ctrlCHandler) == SIG_ERR) {
std::cerr << "Couldn't install signal handler for SIGTERM" << std::endl;
return EXIT_FAILURE;
}
// 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");
if (gConfig.defines("TRX.Reference"))
extref = gConfig.getNum("TRX.Reference");
if (extref)
std::cout << "Using external clock reference" << std::endl;
else
std::cout << "Using internal clock reference" << std::endl;
gLogInit("transceiver", logLevel.c_str(), LOG_LOCAL7);
srandom(time(NULL));
usrp = RadioDevice::make(SPS, chans);
radioType = usrp->open(deviceArgs, extref);
if (radioType < 0) {
LOG(ALERT) << "Transceiver exiting..." << std::endl;
return EXIT_FAILURE;
}
switch (radioType) {
case RadioDevice::NORMAL:
radio = new RadioInterface(usrp, 3, SPS, chans);
break;
case RadioDevice::RESAMP_64M:
case RadioDevice::RESAMP_100M:
radio = new RadioInterfaceResamp(usrp, 3, SPS, chans);
break;
default:
LOG(ALERT) << "Unsupported configuration";
fail = 1;
goto shutdown;
}
if (!radio->init(radioType)) {
LOG(ALERT) << "Failed to initialize radio interface";
fail = 1;
goto shutdown;
}
trx = new Transceiver(trxPort, trxAddr.c_str(),
SPS, chans, GSM::Time(3,0), radio);
if (!trx->init()) {
LOG(ALERT) << "Failed to initialize transceiver";
fail = 1;
goto shutdown;
}
for (int i = 0; i < chans; i++) {
fifo = radio->receiveFIFO(i);
if (fifo && trx->receiveFIFO(fifo, i))
continue;
LOG(ALERT) << "Could not attach FIFO to channel " << i;
fail = 1;
goto shutdown;
}
trx->start();
while (!gbShutdown)
sleep(1);
shutdown:
std::cout << "Shutting down transceiver..." << std::endl;
delete trx;
delete radio;
delete usrp;
if (fail)
return EXIT_FAILURE;
return 0;
}
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