example: add an utility for generating binary IQ sample files

Makefile

 CFLAGS = -Wall -O3
 INCLUDE_FLAGS = -I./include
-LIB_FLAGS =-lc -ldl -libverbs -lpthread
+LIB_FLAGS =-lc -ldl -lm -libverbs -lpthread -L./out
 # Libraries after  `--no-as-needed` are forcefully loaded: they are required by Amarisoft libraries
 FORCE_LIB_FLAGS = -Wl,--no-as-needed -lm -lpthread
 
-all: out/libcapulet.so out/libpotoml.so out/libtrx_rdma.so out/libtrx_play.so out/rdma_standalone out/trx-bridge
+all: out/libcapulet.so out/libpotoml.so out/libtrx_rdma.so out/libtrx_play.so out/rdma_standalone out/generate_iq_samples out/trx-bridge
 
 install: all
 	ln -sfr out/libcapulet.so /usr/local/lib/
@@ -32,13 +32,16 @@ out/libpotoml.so: common/hashtable.lo libpotoml/toml.lo
 	gcc -shared -fPIC -DPIC -o $@ $^ $(LIB_FLAGS)
 
 out/libtrx_rdma.so: libtrx/trx_rdma.lo out/libcapulet.so
-	gcc -shared -fPIC -DPIC -o $@ $< $(LIB_FLAGS) -L./out -lcapulet
+	gcc -shared -fPIC -DPIC -o $@ $< $(LIB_FLAGS) -lcapulet
 
 out/libtrx_play.so: libtrx/trx_play.lo
 	gcc -shared -fPIC -DPIC -o $@ $< $(LIB_FLAGS)
 
 out/rdma_standalone: example/rdma_standalone.o out/libcapulet.so
-	gcc $(CFLAGS) -o $@ $< $(LIB_FLAGS) -L./out -lcapulet
+	gcc $(CFLAGS) -o $@ $< $(LIB_FLAGS) -lcapulet
+
+out/generate_iq_samples: example/generate_iq_samples.o
+	gcc $(CFLAGS) -o $@ $^ $(LIB_FLAGS)
 
 out/trx-bridge: trx-bridge/bridge.o out/libpotoml.so
-	gcc $(CFLAGS) -o $@ $< $(LIB_FLAGS) -L./out -lpotoml $(FORCE_LIB_FLAGS)
+	gcc $(CFLAGS) -o $@ $< $(LIB_FLAGS) -lpotoml $(FORCE_LIB_FLAGS)

example/generate_iq_samples.c

+#include <stdio.h>
+#include <stdint.h>
+#include <math.h>
+
+#define SAMPLE_COUNT 1536
+
+int main(void) {
+	FILE *outfile;
+	uint64_t i;
+	float samples[SAMPLE_COUNT * 2];
+	float time;
+
+	for(i = 0; i < SAMPLE_COUNT; i++) {
+		fflush(stdout);
+		time = (float) i / ((float) SAMPLE_COUNT);
+		samples[i * 2] = cos(6.28318530718 * time);
+		samples[i * 2 + 1] = 0.0;
+		printf("\rGenerating sample %lu: %f", i + 1, samples[i * 2]);
+	}
+
+	printf("\nWriting...\n");
+	outfile = fopen("pure_sine.bin", "w");
+	fwrite(samples, SAMPLE_COUNT * sizeof(float), 1, outfile);
+	fclose(outfile);
+
+	return 0;
+}