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diff --git a/app/src/main/jni/libusb/examples/listdevs.c b/app/src/main/jni/libusb/examples/listdevs.c
new file mode 100644
index 0000000..3328910
--- /dev/null
+++ b/app/src/main/jni/libusb/examples/listdevs.c
@@ -0,0 +1,71 @@
+/*
+ * libusb example program to list devices on the bus
+ * Copyright © 2007 Daniel Drake <dsd@gentoo.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdio.h>
+
+#include "libusb.h"
+
+static void print_devs(libusb_device **devs)
+{
+	libusb_device *dev;
+	int i = 0, j = 0;
+	uint8_t path[8]; 
+
+	while ((dev = devs[i++]) != NULL) {
+		struct libusb_device_descriptor desc;
+		int r = libusb_get_device_descriptor(dev, &desc);
+		if (r < 0) {
+			fprintf(stderr, "failed to get device descriptor");
+			return;
+		}
+
+		printf("%04x:%04x (bus %d, device %d)",
+			desc.idVendor, desc.idProduct,
+			libusb_get_bus_number(dev), libusb_get_device_address(dev));
+
+		r = libusb_get_port_numbers(dev, path, sizeof(path));
+		if (r > 0) {
+			printf(" path: %d", path[0]);
+			for (j = 1; j < r; j++)
+				printf(".%d", path[j]);
+		}
+		printf("\n");
+	}
+}
+
+int main(void)
+{
+	libusb_device **devs;
+	int r;
+	ssize_t cnt;
+
+	r = libusb_init(NULL);
+	if (r < 0)
+		return r;
+
+	cnt = libusb_get_device_list(NULL, &devs);
+	if (cnt < 0)
+		return (int) cnt;
+
+	print_devs(devs);
+	libusb_free_device_list(devs, 1);
+
+	libusb_exit(NULL);
+	return 0;
+}