} // end of GetDeviceDesc()
/// <summary>
/// Detect attached microbits.
/// </summary>
/// <param name="createDevices">Whether or not to open interfaces to attached microbits.</param>
/// <returns>The number of attached microbits.</returns>
public static int RefreshDevices(bool createDevices = true)
{
// If specified on the command line, do not scan for microbits.
if (Program2.CmdLine.Exists("NoMicrobit"))
{
return(0);
}
int prevDeviceCount = Microbits.Count;
ReleaseDevices();
#if false
// Print the Caption and DeviceID of all connected PNP devices. This
// is helpful when you need to discover what the exact device id is
// for a particular device you want to be able to detect.
{
using (var searcher = new ManagementObjectSearcher(@"Select * From Win32_PnPEntity"))
using (var collection = searcher.Get())
{
foreach (var device in collection)
{
string Caption = (string)device.GetPropertyValue("Caption");
string DeviceID = (string)device.GetPropertyValue("DeviceID");
System.Diagnostics.Debug.WriteLine(Caption + " ---- " + DeviceID);
}
}
}
#endif
List <MicrobitDesc> microbitDescs = new List <MicrobitDesc>();
// Detect microbits.
microbitDescs = GetDeviceDesc();
// Open interfaces to devices.
if (createDevices)
{
if (DriverInstalled)
{
if (microbitDescs != null && microbitDescs.Count > 0)
{
int microbitIndex = (int)GamePadSensor.PlayerId.One;
foreach (MicrobitDesc desc in microbitDescs)
{
Microbit microbit = Microbit.Create(desc);
if (microbit != null)
{
Microbits.TryAdd(microbitIndex++, microbit);
}
}
}
}
else
{
// Do nothing here. The main thread loop will notice that DirverInstalled is false
// and should put up the needed dialog there. We can't do it here since the dialog
// can't be shown on a background thread.
}
}
// If none were found, check if user tried the command line.
if (microbitDescs.Count == 0 && Program2.MicrobitCmdLine != null)
{
if (Program2.MicrobitCmdLine.Length == 7)
{
MicrobitDesc desc = new MicrobitDesc();
desc.COM = Program2.MicrobitCmdLine.Substring(0, 4);
desc.Drive = Program2.MicrobitCmdLine.Substring(5);
microbitDescs.Add(desc);
}
}
int deviceCount = createDevices ? Microbits.Count : microbitDescs.Count;
// If any microbits were detected, then permanently enable visibility of the microbit programming tiles.
if (!XmlOptionsData.ShowMicrobitTiles && deviceCount > 0)
{
XmlOptionsData.ShowMicrobitTiles = true;
Instrumentation.RecordEvent(Instrumentation.EventId.MicrobitTilesEnabled, "");
}
// Track the number of microbits attached at one time.
if (prevDeviceCount < deviceCount)
{
Instrumentation.SetCounter(Instrumentation.CounterId.MicrobitCount, deviceCount);
}
return(deviceCount);
}