///<summary>
/// Opens the USB device handle.
///</summary>
///<returns>
///True if the device is already opened or was opened successfully.
///False if the device does not exists or is no longer valid.
///</returns>
public override bool Open()
{
if (IsOpen)
{
return(true);
}
SafeFileHandle sfhDev;
bool bSuccess = WinUsbAPI.OpenDevice(out sfhDev, mDevicePath);
if (bSuccess)
{
SafeWinUsbInterfaceHandle handle = new SafeWinUsbInterfaceHandle();
if ((bSuccess = WinUsbAPI.WinUsb_Initialize(sfhDev, ref handle)))
{
mSafeDevHandle = sfhDev;
mUsbHandle = handle;
mPowerPolicies = new PowerPolicies(this);
}
else
{
UsbError.Error(ErrorCode.Win32Error, Marshal.GetLastWin32Error(), "Open:Initialize", typeof(UsbDevice));
}
}
else
{
UsbError.Error(ErrorCode.Win32Error, Marshal.GetLastWin32Error(), "Open", typeof(UsbDevice));
}
return(bSuccess);
}
internal WinUsbDevice(UsbApiBase usbApi,
SafeFileHandle usbHandle,
SafeHandle handle,
string devicePath)
: base(usbApi, handle)
{
mDevicePath = devicePath;
mSafeDevHandle = usbHandle;
mPowerPolicies = new PowerPolicies(this);
}
