Added USB API

example_getdetailedportlist_test.go

@@ -0,0 +1,29 @@
+//
+// Copyright 2014-2016 Cristian Maglie. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+//
+
+package serial_test
+
+import "fmt"
+import "log"
+import "go.bug.st/serial.v1"
+
+func ExampleGetDetailedPortsList() {
+	ports, err := serial.GetDetailedPortsList()
+	if err != nil {
+		log.Fatal(err)
+	}
+	if len(ports) == 0 {
+		fmt.Println("No serial ports found!")
+		return
+	}
+	for _, port := range ports {
+		fmt.Printf("Found port: %s\n", port.Name)
+		if port.IsUSB {
+			fmt.Printf("   USB ID     %s:%s\n", port.VID, port.PID)
+			fmt.Printf("   USB serial %s\n", port.SerialNumber)
+		}
+	}
+}