private async void SendCommandAsync( WakePacket packet ) {
if( Current_com_port == null || packet == null ) {
return;
}
try {
await Current_com_port.WriteAsync( packet );
} catch( TaskCanceledException ) {
//ignore
} catch( Exception ex ) {
if( Current_com_port != null ) {
Current_com_port.Close();
Current_com_port = null;
}
MessageBox.Show( ex.Message );
}
}
private void Robot_car_arduino_controller_form_FormClosed( object sender, FormClosedEventArgs e ) {
if( Current_com_port != null ) {
Current_com_port.Close();
Current_com_port = null;
}
}
private async void Open_the_com_port_button_Click( object sender, EventArgs e ) {
try {
Open_the_com_port_button.Enabled = false;
cbComPorts.Enabled = false;
Joystick_controller.Center_the_joystick();
Update_joystick_coordinates_text_on_the_screen();
if( Current_com_port != null ) {
Current_com_port.Close();
Current_com_port = null;
return;
}
string Com_port_name = cbComPorts.SelectedValue.ToString();
Task<Com_port_class> openComPort = new Task<Com_port_class>( () => {
return new Com_port_class( Com_port_name );
} );
openComPort.Start();
Current_com_port = await openComPort;
MessageBox.Show( "COM port \"" + Com_port_name + "\" has been opened successfully." );
} catch( Exception Ex ) {
if( Current_com_port != null ) {
Current_com_port.Close();
Current_com_port = null;
}
MessageBox.Show( Ex.Message );
} finally {
Open_the_com_port_button.Enabled = true;
if( Current_com_port != null ) {
Open_the_com_port_button.Text = DisconnectButtonText;
} else {
Open_the_com_port_button.Text = ConnectButtonText;
cbComPorts.Enabled = true;
}
}
}