public async Task SendMessage(byte[] data, bool force)
{
if (_status != RotorStatus.Waiting && !force)
{
// drop the data
System.Diagnostics.Debug.WriteLine("Dropped a packet.");
return;
}
if (_port == null)
{
await SetupAsync();
if (_port == null)
{
return;
}
}
if (!_port.IsOpen)
{
try
{
_port.Open();
}
catch (Exception)
{
return;
}
}
_status = RotorStatus.Sending;
byte num_rotor = (byte)data.Length;
var send_data = new byte[19]; // zero cleared
send_data[0] = 0xFA;
send_data[1] = 0xAF;
for (int i = 0; i < num_rotor; ++i)
{
send_data[2 + i] = data[i];
}
byte check_sum = 0;
for (int i = 0; i < 18; ++i)
{
check_sum += send_data[i];
}
send_data[18] = check_sum;
//var send_data = _port.Encoding.GetBytes(builder.ToString());
await _port.BaseStream.WriteAsync(send_data, 0, send_data.Length);
await _port.BaseStream.FlushAsync();
await Task.Delay(_interval); // wait for 10 msec
_status = RotorStatus.Waiting;
}
public async Task SetupAsync()
{
if (_status == RotorStatus.Initializing)
{
return;
}
_status = RotorStatus.Initializing;
SerialPort port;
string[] ports = SerialPort.GetPortNames();
// For Debugging
foreach (string p in ports)
{
System.Diagnostics.Debug.WriteLine(p);
}
if (ports.Length <= 0)
{
_status = RotorStatus.NotInitialized;
return;
}
if (_port != null && _port.IsOpen)
{
try
{
_port.Close();
}
catch (Exception)
{
_status = RotorStatus.NotInitialized;
return;
}
}
var selected_port_name = ports[0];
var bluetoothNameToCOMPortNumber = GetBluetoothCOMPorts();
foreach (var pair in bluetoothNameToCOMPortNumber)
{
if (pair.Key.IndexOf(_device_name) != -1)
{
selected_port_name = pair.Value;
break;
}
}
// for debugging
System.Diagnostics.Debug.WriteLine(selected_port_name + " is selected.");
port = new SerialPort
{
PortName = selected_port_name,
BaudRate = 115200,
Parity = Parity.None,
DataBits = 8,
StopBits = StopBits.One,
Handshake = Handshake.None
};
while (true)
{
try
{
port.Open();
break;
}
catch (Exception)
{
await Task.Delay(1000);
}
}
_port = port;
_status = RotorStatus.Waiting;
}
