public override void Dispose()
{
if (_firmata != null)
{
_firmata.Dispose();
_firmata = null;
}
}
private async void UpdateFirmataDeviceList()
{
// return immediately if a scan is already in progress
if (1 == Interlocked.CompareExchange(ref _firmataScanInProgress, 1, 0))
{
return;
}
try
{
var useOnlyThesePorts = new List <string>();
if (Settings.Default.ScanCOMPorts != null && Settings.Default.ScanCOMPorts.Count > 0)
{
useOnlyThesePorts = Settings.Default.ScanCOMPorts.Cast <string>().ToList();
}
// Treat serial ports as firmata first, deployable targets secondly
// Deployment usually happens on USB and firmata is always found on serial,
// so making this presumption speeds things up.
var serialPorts = SerialPort.GetPortNames();
foreach (var portname in serialPorts)
{
// If the com-port list is not empty, and the current port is not in that list
// then skip this candidate port. The user has excluded it.
if (useOnlyThesePorts.Count > 0 &&
!useOnlyThesePorts.Any(x => x.ToLowerInvariant() == portname.ToLowerInvariant()))
{
continue;
}
// only probe if we don't already have this port registered
if (_devices.Any(x => x is FirmataTargetDevice && ((FirmataTargetDevice)x).DisplayName == portname))
{
continue;
}
bool probeSuccessful = false;
var engine = new FirmataEngine(portname);
try
{
await engine.ProbeAndOpen();
var fwVers = await engine.GetFullFirmwareVersion();
Debug.WriteLine("Found on {0} : App:'{1}' app version v{2} protocol version v{3}", portname, fwVers.Name, fwVers.AppVersion, fwVers.Version);
probeSuccessful = true;
}
catch
{
probeSuccessful = false;
}
if (probeSuccessful)
{
lock (_devices)
{
_devices.Add(new FirmataTargetDevice(portname, engine));
}
}
}
// Remove items that have disappeared
foreach (var knownItem in _devices.ToArray())
{
if (knownItem is FirmataTargetDevice)
{
var item = (FirmataTargetDevice)knownItem;
if (!serialPorts.Any(x => x == item.DisplayName))
{
lock (_devices)
{
knownItem.Dispose();
_devices.Remove(knownItem);
}
}
}
}
}
finally
{
Interlocked.Exchange(ref _firmataScanInProgress, 0);
}
}
public FirmataTargetDevice(string name, FirmataEngine firmata)
{
_name = name;
_firmata = firmata;
Task.Run(() => InitializeAsync());
}