Add RequestInfo/ResponseInfo with MAC address

cmd/load/main.go

@@ -65,6 +65,29 @@ func run(buildDir string) error {
 	fmt.Println("Rebooting...")
 	_ = picotool.Reboot()
 
+	time.Sleep(3 * time.Second)
+
+	dev, err = picoserial.FindDevice()
+	if err != nil {
+		return err
+	}
+	if dev != "" {
+		t, err := picoserial.Open(dev)
+		if err != nil {
+			return err
+		}
+		c := client.New(t, 2*time.Second)
+		info, err := c.Info()
+		c.Close()
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "warning: Info request failed: %v\n", err)
+		} else {
+			fmt.Printf("MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
+				info.MAC[0], info.MAC[1], info.MAC[2],
+				info.MAC[3], info.MAC[4], info.MAC[5])
+		}
+	}
+
 	fmt.Println("Done.")
 	return nil
 }