protected override void OnResume()
{
base.OnResume();
Log.Debug(TAG, "Resumed, port=" + UseUsbSerialPort);
if (UseUsbSerialPort == null)
{
TitleTextView.Text = "No serial device.";
}
else
{
try {
UseUsbSerialPort.Baudrate = TransfarRate;
UseUsbSerialPort.Open();
TransfarRateValueTextView.SetText(TransfarRate.ToString(), TextView.BufferType.Normal);
} catch (Exception e) {
Log.Error(TAG, "Error setting up device: " + e.Message, e);
TitleTextView.Text = "Error opening device: " + e.Message;
try {
UseUsbSerialPort.Close();
} catch (Exception) {
// Ignore.
}
UseUsbSerialPort = null;
return;
}
TitleTextView.Text = "Serial device: " + DeviceName;
}
RequestedOrientation = ScreenOrientation.Portrait;
}
public async Task <bool> Open(int baudRate)
{
Console.WriteLine("Getting permission");
var perm = await usbManager.RequestPermissionAsync(port.Driver.Device, ctx);
if (perm)
{
try {
conn = usbManager.OpenDevice(port.Driver.Device);
port.Open(conn);
port.SetParameters(baudRate, 8, StopBits.One, Parity.None);
port.SetDTR(true);
new Handler(Looper.MainLooper).Post(() => {
Toast.MakeText(ctx, "Serial connected", ToastLength.Short).Show();
});
} catch (Java.IO.IOException) {
// TODO: Handle this
throw;
}
return(true);
}
else
{
return(false);
}
}
protected override void OnResume()
{
base.OnResume();
Log.Debug(TAG, "Resumed, port=" + mUsbSerialPort);
if (mUsbSerialPort == null)
{
mTitleTextView.Text = "No serial device.";
}
else
{
try {
mUsbSerialPort.Baudrate = 19200;
mUsbSerialPort.Open();
} catch (Exception e) {
Log.Error(TAG, "Error setting up device: " + e.Message, e);
mTitleTextView.Text = "Error opening device: " + e.Message;
try {
mUsbSerialPort.Close();
} catch (Exception) {
// Ignore.
}
mUsbSerialPort = null;
return;
}
mTitleTextView.Text = "Serial device: " + mUsbSerialPort.GetType().Name;
}
}
public void Open(UsbManager usbManager, int bufferSize = DEFAULT_BUFFERSIZE)
{
if (disposed)
{
throw new ObjectDisposedException(GetType().Name);
}
if (IsOpen)
{
throw new InvalidOperationException();
}
var connection = usbManager.OpenDevice(port.GetDriver().GetDevice());
if (connection == null)
{
throw new Java.IO.IOException("Failed to open device");
}
isOpen = true;
buffer = new byte[bufferSize];
port.Open(connection);
port.SetParameters(BaudRate, DataBits, StopBits, Parity);
cancelationTokenSource = new CancellationTokenSource();
var cancelationToken = cancelationTokenSource.Token;
cancelationToken.Register(() => Log.Info(TAG, "Cancellation Requested"));
Task.Run(() => {
Log.Info(TAG, "Task Started!");
try
{
while (true)
{
cancelationToken.ThrowIfCancellationRequested();
Step(); // execute step
}
}
catch (OperationCanceledException)
{
throw;
}
catch (Exception e)
{
Log.Warn(TAG, "Task ending due to exception: " + e.Message, e);
ErrorReceived.Raise(this, new UnhandledExceptionEventArgs(e, false));
}
finally
{
port.Close();
port.Driver.Device.Dispose();//richard: avoid GREF leak
buffer = null;
isOpen = false;
Log.Info(TAG, "Task Ended!");
}
}, cancelationToken);
}