internal static GarminDevice FromHandle(SafeFileHandle handle)
{
var device = new GarminDevice();
device.handle = handle;
device.PacketSize = GetUSBPacketSize(handle);
return(device);
}
public static List <GarminDevice> FindDevices()
{
IntPtr handleDeviceInfo = IntPtr.Zero;
///Get device information set that contains all devices of a specified class.
handleDeviceInfo = UnsafeNativeMethods.SetupDiGetClassDevs(
ref garminGuid,
IntPtr.Zero,
IntPtr.Zero,
UnsafeNativeMethods.DiGetClassFlags.DIGCF_PRESENT |
UnsafeNativeMethods.DiGetClassFlags.DIGCF_DEVICEINTERFACE);
if (handleDeviceInfo.ToInt32() == UnsafeNativeMethods.INVALID_HANDLE_VALUE)
{
UnsafeNativeMethods.SetupDiDestroyDeviceInfoList(handleDeviceInfo);
throw new InvalidOperationException("invalid handle");
}
bool success = true;
uint memberIndex = 0;
var devices = new List <GarminDevice>();
while (success)
{
// create a Device Interface Data structure
UnsafeNativeMethods.SP_DEVICE_INTERFACE_DATA deviceInterfaceData =
new UnsafeNativeMethods.SP_DEVICE_INTERFACE_DATA();
deviceInterfaceData.cbSize = (uint)Marshal.SizeOf(deviceInterfaceData);
// start the enumeration of all devices
success = UnsafeNativeMethods.SetupDiEnumDeviceInterfaces(
handleDeviceInfo,
IntPtr.Zero,
ref garminGuid,
memberIndex,
ref deviceInterfaceData);
if (Marshal.GetLastWin32Error() == UnsafeNativeMethods.ERROR_NO_MORE_ITEMS)
{
success = false;
break;
}
if (!success)
{
break;
}
UnsafeNativeMethods.SP_DEVINFO_DATA deviceInfoData = new UnsafeNativeMethods.SP_DEVINFO_DATA();
deviceInfoData.cbSize = (uint)Marshal.SizeOf(deviceInfoData);
UnsafeNativeMethods.SP_DEVICE_INTERFACE_DETAIL_DATA deviceInterfaceDetailData =
new UnsafeNativeMethods.SP_DEVICE_INTERFACE_DETAIL_DATA();
if (IntPtr.Size == 8) // for 64 bit operating systems
{
deviceInterfaceDetailData.cbSize = 8;
}
else
{
deviceInterfaceDetailData.cbSize = 4 + (uint)Marshal.SystemDefaultCharSize; //i.e 5
}
// now we can get some more detailed information
uint nRequiredSize = 0;
uint nBytes = UnsafeNativeMethods.BUFFER_SIZE;
if (!UnsafeNativeMethods.SetupDiGetDeviceInterfaceDetail(
handleDeviceInfo,
ref deviceInterfaceData,
ref deviceInterfaceDetailData,
nBytes,
out nRequiredSize,
ref deviceInfoData))
{
throw new InvalidOperationException("Error getting device interface detail");
}
else
{
GarminDevice garminDevice = GarminDevice.FromHandle(GetHandleFromDevicePath(deviceInterfaceDetailData.DevicePath));
devices.Add(garminDevice);
}
memberIndex++;
}
return(devices);
}
