private void Form1_Load(object sender, EventArgs e)
{
card_read = false;
serial = new SerialPort();
//speech Sythesizer
speechSynthesizerObj = new SpeechSynthesizer();
LBL_Allergen.Text = start;
//Auto Select Serial Port
//Tries every availbe serial port on pc
foreach (string p in SerialPort.GetPortNames())
{
//Set read timeout low to speed up auto conenct
serial.ReadTimeout = 50;
try
{
//Mbed Returns 0 on ?
serial.PortName = p;
serial.Open();
Thread.Sleep(20);
Console.WriteLine("Trying Port " + p);
serial.WriteLine("?");
string test_return = serial.ReadLine();
int t_return = int.Parse(test_return);
if (t_return == 0)
{
Console.WriteLine("MBed Connected To " + p);
Messagebox.showdialog("MBed Connected To " + p);
break;
}
else
{
Console.WriteLine("Mbed Not Connected to " + p);
//if not connected close port before trying to connect
serial.Close();
}
}
catch (TimeoutException)
{
//no return from ?
Console.WriteLine("Mbed Not Connected to " + p);
}
catch (InvalidOperationException)
{
//port unavailbe
Console.WriteLine("Unable to open " + p);
}
catch (UnauthorizedAccessException)
{
//Port already open
Console.WriteLine("Port " + p + " is Already Open");
}
catch (FormatException)
{
//wrong value returned
Console.WriteLine("Parse Error");
}
}
serial.ReadTimeout = 5000;
}