Add chirp

src/Makefile

@@ -1,5 +1,5 @@
 #all: ../rpitx ../pissb ../pisstv ../pifsq ../pifm ../piam ../pidcf77
-all: ../pisstv ../piopera ../pifsq
+all: ../pisstv ../piopera ../pifsq ../pichirp
 
 CFLAGS	= -Wall -g -O2 -Wno-unused-variable 
 LDFLAGS	= librpitx/src/librpitx.a -lm -lrt -lpthread 
@@ -28,6 +28,9 @@ LDFLAGS_Pisstv	= librpitx/src/librpitx.a -lm -lrt -lpthread
 ../pifsq : fsq/pifsq.cpp 
 	$(CC) $(CFLAGS) -o ../pifsq fsq/pifsq.cpp  $(LDFLAGS) 
 
+../pichirp : chirp/chirp.cpp 
+	$(CC) $(CFLAGS) -o ../pichirp chirp/chirp.cpp  $(LDFLAGS) 
+
 CFLAGS_Pifm	= -Wall -g -O2 -Wno-unused-variable
 LDFLAGS_Pifm	= librpitx/src/librpitx.a -lm -lrt -lpthread -lsndfile
 ../pifm : ../fm/pifm.c 

src/chirp/chirp.cpp

@@ -0,0 +1,109 @@
+#include <unistd.h>
+#include "../librpitx/src/librpitx.h"
+#include <unistd.h>
+#include "stdio.h"
+#include <cstring>
+#include <signal.h>
+
+bool running=true;
+
+
+void SimpleTestDMA(uint64_t Freq)
+{
+	
+
+	int SR=1000;
+	int FifoSize=4096;
+	ngfmdmasync ngfmtest(Freq,SR,14,FifoSize);
+	for(int i=0;running;)
+	{
+		//usleep(10);
+		usleep(FifoSize*1000000.0*3.0/(4.0*SR));
+		int Available=ngfmtest.GetBufferAvailable();
+		if(Available>FifoSize/2)
+		{	
+			int Index=ngfmtest.GetUserMemIndex();
+			//printf("GetIndex=%d\n",Index);
+			for(int j=0;j<Available;j++)
+			{
+				//ngfmtest.SetFrequencySample(Index,((i%10000)>5000)?1000:0);
+				ngfmtest.SetFrequencySample(Index+j,(i%SR)/10.0);
+				i++;
+			
+			}
+		}
+		
+		
+	}
+	fprintf(stderr,"End\n");
+	
+	ngfmtest.stop();
+	
+}
+
+
+
+static void
+terminate(int num)
+{
+    running=false;
+	fprintf(stderr,"Caught signal - Terminating\n");
+   
+}
+
+
+int main(int argc, char* argv[])
+{
+	
+	if(argc<3) {printf("Usage : pichirp Frequency(Hz) Bandwidth(Hz) Time(Seconds)\n");exit(0);}
+	
+	float Frequency=atof(argv[1]);
+	float Bandwidth=atof(argv[2]);
+	float Time=atof(argv[3]);
+
+	 for (int i = 0; i < 64; i++) {
+        struct sigaction sa;
+
+        std::memset(&sa, 0, sizeof(sa));
+        sa.sa_handler = terminate;
+        sigaction(i, &sa, NULL);
+    }
+	
+	int SR=200000;
+	 
+	int FifoSize=4096;
+	ngfmdmasync ngfmtest(Frequency,SR,14,FifoSize);
+	float Step=Bandwidth/Time;	//Deviation Hz by second 
+	float StepWithSR=Step/(float)SR;
+	int NbStepWithSR=Time*SR;
+	float FrequencyDeviation=0;
+	int count=0;
+	for(int i=0;running;)
+	{
+		
+		usleep(FifoSize*1000000.0*3.0/(4.0*SR));
+		int Available=ngfmtest.GetBufferAvailable();
+		if(Available>FifoSize/2)
+		{	
+			int Index=ngfmtest.GetUserMemIndex();
+			
+			for(int j=0;j<Available;j++)
+			{
+				
+				ngfmtest.SetFrequencySample(Index+j,StepWithSR*count);
+				count++;
+				if(count>NbStepWithSR) count=0;
+			
+			}
+		}
+		
+		
+	}
+	fprintf(stderr,"End\n");
+	
+	ngfmtest.stop();
+
+	
+	
+	
+}