--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Makefile	Sun Jun 21 14:44:33 2015 +0200
@@ -0,0 +1,13 @@
+# makefile to compile test programs independently of LabWindowCVI
+
+TESTS = test-ad9912 test-ad9956
+CFLAGS = -Wall -Wextra -Werror
+
+all: $(TESTS)
+
+test-ad9912: xsocket.o ad9912.o
+
+test-ad9956: xsocket.o ad9956.o
+
+clean:
+	rm -f *.o $(TESTS)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test-ad9912.c	Sun Jun 21 14:44:33 2015 +0200
@@ -0,0 +1,43 @@
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include "ad9912.h"
+
+#define die() do { printf("ERROR: %s\n", strerror(-r)); exit(EXIT_FAILURE); } while (0)
+#define error() do { printf("ERROR: %s\n", strerror(-r)); } while (0)
+
+int main(int argc, char **argv)
+{
+	int r;
+	double f;
+	struct ad9912 dds;
+
+	if (argc < 2)
+		exit(EXIT_FAILURE);
+	
+	r = ad9912_init(&dds, argv[1], 1e9);
+	if (r < 0)
+		error();
+
+	for (int i = 0; i < 4; i++) {
+		r = ad9912_get_frequency(&dds, i, &f);
+		if (r < 0)
+			die();
+		printf("DDS%d f=%f Hz\n", i, f);
+	}
+	
+	for (int i = 0; i < 4; i++) {
+		r = ad9912_set_frequency(&dds, i, i * 10e6);
+		if (r < 0)
+			error();
+	}
+	
+	for (int i = 0; i < 4; i++) {
+		r = ad9912_get_frequency(&dds, i, &f);
+		if (r < 0)
+			error();
+		printf("DDS%d f=%f Hz\n", i, f);
+	}
+
+	return 0;
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test-ad9956.c	Sun Jun 21 14:44:33 2015 +0200
@@ -0,0 +1,29 @@
+#include <stdio.h>
+#include <string.h>
+#include "ad9956.h"
+
+#define error() do { printf("ERROR: %s\n", strerror(-r)); exit(EXIT_FAILURE); } while (0)
+
+int main(int argc, char **argv)
+{
+	int r;
+	double f;
+	struct ad9956 dds;
+
+	if (argc < 2)
+		return 1;
+	
+	r = ad9956_init(&dds, argv[1], 1e9);
+	if (r < 0)
+		error();
+
+	r = ad9956_get_frequency(&dds, &f);
+	if (r < 0)		
+		error();
+
+	r = ad9956_set_frequency(&dds, 10e6);
+	if (r < 0)		
+		error();
+
+	return 0;
+}