1 files changed, 146 insertions, 0 deletions
diff --git a/Transceiver52M/DummyLoad.cpp b/Transceiver52M/DummyLoad.cpp
new file mode 100644
index 0000000..d11226e
--- /dev/null
+++ b/Transceiver52M/DummyLoad.cpp
@@ -0,0 +1,146 @@
+/*
+* Copyright 2008, 2009 Free Software Foundation, Inc.
+*
+* This software is distributed under the terms of the GNU 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 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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+
+/*
+	Compilation Flags
+
+	SWLOOPBACK	compile for software loopback testing
+*/ 
+
+
+#include <stdint.h>
+#include <string.h>
+#include <stdlib.h>
+#include "Threads.h"
+#include "DummyLoad.h"
+
+#include <Logger.h>
+
+
+using namespace std;
+
+
+
+int DummyLoad::loadBurst(short *wDummyBurst, int len) {
+  dummyBurst = wDummyBurst;
+  dummyBurstSz = len;
+}
+
+
+DummyLoad::DummyLoad (double _desiredSampleRate) 
+{
+  LOG(INFO) << "creating USRP device...";
+  sampleRate = _desiredSampleRate;
+}
+
+void DummyLoad::updateTime(void) {
+    gettimeofday(&currTime,NULL);
+    double timeElapsed = (currTime.tv_sec - startTime.tv_sec)*1.0e6 + 
+      (currTime.tv_usec - startTime.tv_usec);
+    currstamp = (TIMESTAMP) floor(timeElapsed/(1.0e6/sampleRate));
+}
+
+bool DummyLoad::make(bool wSkipRx) 
+{
+
+  samplesRead = 0;
+  samplesWritten = 0;
+  return true;
+}
+
+bool DummyLoad::start() 
+{
+  LOG(INFO) << "starting USRP...";
+  underrun = false;
+  gettimeofday(&startTime,NULL);
+  dummyBurstCursor = 0;
+  return true;
+}
+
+bool DummyLoad::stop() 
+{
+  return true;
+}
+
+
+// NOTE: Assumes sequential reads
+int DummyLoad::readSamples(short *buf, int len, bool *overrun, 
+			    TIMESTAMP timestamp,
+			    bool *wUnderrun,
+			    unsigned *RSSI) 
+{
+  updateTime();
+  underrunLock.lock();
+  *wUnderrun = underrun;
+  underrunLock.unlock();
+  if (currstamp+len < timestamp) {
+	usleep(100); 
+	return NULL;
+  } 
+  else if (currstamp < timestamp) {
+	usleep(100);
+	return NULL;
+  }
+  else if (timestamp+len < currstamp) {
+	memcpy(buf,dummyBurst+dummyBurstCursor*2,sizeof(short)*2*(dummyBurstSz-dummyBurstCursor));
+	int retVal = dummyBurstSz-dummyBurstCursor;
+	dummyBurstCursor = 0;
+	return retVal;
+  }
+  else if (timestamp + len > currstamp) {
+	int amount = timestamp + len - currstamp;
+	if (amount < dummyBurstSz-dummyBurstCursor) {
+	        memcpy(buf,dummyBurst+dummyBurstCursor*2,sizeof(short)*2*amount);
+        	dummyBurstCursor += amount;
+        	return amount;
+	}
+	else {
+        	memcpy(buf,dummyBurst+dummyBurstCursor*2,sizeof(short)*2*(dummyBurstSz-dummyBurstCursor));
+        	int retVal = dummyBurstSz-dummyBurstCursor;
+        	dummyBurstCursor = 0;
+        	return retVal;
+        }
+  }
+  return 0;
+}
+
+int DummyLoad::writeSamples(short *buf, int len, bool *wUnderrun, 
+			     unsigned long long timestamp,
+			     bool isControl) 
+{
+  updateTime();
+  underrunLock.lock();
+  underrun |= (currstamp+len < timestamp); 
+  underrunLock.unlock();
+  return len;
+}
+
+bool DummyLoad::updateAlignment(TIMESTAMP timestamp) 
+{
+  return true;
+}
+
+bool DummyLoad::setTxFreq(double wFreq) { return true;};
+bool DummyLoad::setRxFreq(double wFreq) { return true;};