rtl8720dn: add ./examples/rtl8720dn/version

examples/rtl8720dn/version/main.go

@@ -0,0 +1,40 @@
+package main
+
+import (
+	"fmt"
+	"time"
+
+	"tinygo.org/x/drivers/examples/rtl8720dn"
+)
+
+var (
+	debug = false
+)
+
+func main() {
+	err := run()
+	for err != nil {
+		fmt.Printf("error: %s\r\n", err.Error())
+		time.Sleep(5 * time.Second)
+	}
+}
+
+func run() error {
+	//rtl8720dn.Debug(true)
+	rtl, err := rtl8720dn.Setup()
+	if err != nil {
+		return err
+	}
+
+	ver, err := rtl.Version()
+	if err != nil {
+		return nil
+	}
+
+	for {
+		fmt.Printf("RTL8270DN Firmware Version: %s\r\n", ver)
+		time.Sleep(10 * time.Second)
+	}
+
+	return nil
+}