private async void DeviceIOSet_Click_1(object sender, RoutedEventArgs e)
        {
            var fx2Device = DeviceList.Current.GetSelectedDevice();

            if (fx2Device == null)
            {
                rootPage.NotifyUser("Fx2 device not connected or accessible", NotifyType.ErrorMessage);
                return;
            }

            byte val = (byte)(DeviceIOSegmentInput.SelectedIndex + 1);

            byte[] input = new byte[] {
                Fx2Driver.DigitToSevenSegment(val)
            };

            try
            {
                await fx2Device.SendIOControlAsync(
                    Fx2Driver.SetSevenSegmentDisplay,
                    input.AsBuffer(),
                    null
                    );

                rootPage.NotifyUser("The segement display is set to " + val, NotifyType.StatusMessage);
            }
            catch (Exception exception)
            {
                rootPage.NotifyUser(exception.Message, NotifyType.ErrorMessage);
            }
        }