|
public static CreateFileFromDevice ( string filename, EFileAccess desiredAccess, EFileShare shareMode ) : |
||
| filename | string | |
| desiredAccess | EFileAccess | |
| shareMode | EFileShare | |
| return | ||
protected override bool TryCreateDevice(object key, out HidDevice device, out object completionState)
{
string path = (string)key;
var hidDevice = new WinHidDevice(path);
IntPtr handle = NativeMethods.CreateFileFromDevice(path, NativeMethods.EFileAccess.None, NativeMethods.EFileShare.All);
device = null;
completionState = null;
if (handle == (IntPtr)(-1))
{
return(false);
}
bool ok = false;
try {
ok = hidDevice.GetInfo(handle);
} catch {
}
if (!ok)
{
NativeMethods.CloseHandle(handle);
return(false);
}
device = hidDevice;
completionState = handle;
return(true);
}
internal void Init(string devicePath)
{
IntPtr handle = NativeMethods.CreateFileFromDevice(devicePath,
NativeMethods.EFileAccess.Read | NativeMethods.EFileAccess.Write,
NativeMethods.EFileShare.None);
if (handle == (IntPtr)(-1))
{
int hr = Marshal.GetHRForLastWin32Error();
throw DeviceException.CreateIOException(Device, "Unable to open serial device (" + devicePath + ").", hr);
}
var timeouts = new NativeMethods.COMMTIMEOUTS();
timeouts.ReadIntervalTimeout = uint.MaxValue;
timeouts.ReadTotalTimeoutConstant = uint.MaxValue - 1; // CP210x fails if this is set to uint.MaxValue.
timeouts.ReadTotalTimeoutMultiplier = uint.MaxValue;
if (!NativeMethods.SetCommTimeouts(handle, out timeouts))
{
int hr = Marshal.GetHRForLastWin32Error();
NativeMethods.CloseHandle(handle);
throw DeviceException.CreateIOException(Device, "Unable to set serial timeouts.", hr);
}
_handle = handle;
HandleInitAndOpen();
}
internal void Init(string path, WinHidDevice device)
{
IntPtr handle = NativeMethods.CreateFileFromDevice(path, NativeMethods.EFileAccess.Read | NativeMethods.EFileAccess.Write, NativeMethods.EFileShare.All);
if (handle == (IntPtr)(-1))
{
throw new IOException("Unable to open HID class device.");
}
_device = device;
_handle = handle;
HandleInitAndOpen();
}
internal unsafe void Init(string path)
{
IntPtr handle = NativeMethods.CreateFileFromDevice(path, NativeMethods.EFileAccess.Read | NativeMethods.EFileAccess.Write, 0);
if (handle == (IntPtr)(-1))
{
throw DeviceException.CreateIOException(Device, "Unable to open BLE service (" + path + ").");
}
_handle = handle;
HandleInitAndOpen();
// Let's register to watch all possible characteristics.
var watchedCharacteristics = new List <WinBleCharacteristic>();
foreach (var characteristic in Service.GetCharacteristics())
{
if (characteristic.IsNotifiable || characteristic.IsIndicatable)
{
watchedCharacteristics.Add((WinBleCharacteristic)characteristic);
}
}
if (watchedCharacteristics.Count > 0)
{
var eb = stackalloc byte[checked (NativeMethods.BLUETOOTH_GATT_VALUE_CHANGED_EVENT_REGISTRATION.Size +
NativeMethods.BTH_LE_GATT_CHARACTERISTIC.Size * watchedCharacteristics.Count)];
var er = (NativeMethods.BLUETOOTH_GATT_VALUE_CHANGED_EVENT_REGISTRATION *)eb;
er->NumCharacteristics = (ushort)watchedCharacteristics.Count;
eb += NativeMethods.BLUETOOTH_GATT_VALUE_CHANGED_EVENT_REGISTRATION.Size;
for (int i = 0; i < watchedCharacteristics.Count; i++)
{
var wc = watchedCharacteristics[i];
Marshal.StructureToPtr(wc.NativeData, (IntPtr)eb, false);
eb += NativeMethods.BTH_LE_GATT_CHARACTERISTIC.Size;
_watchMap[wc.NativeData.AttributeHandle] = wc;
}
_watchCallback = new NativeMethods.BLUETOOTH_GATT_EVENT_CALLBACK(EventCallback);
int error = NativeMethods.BluetoothGATTRegisterEvent(handle, NativeMethods.BTH_LE_GATT_EVENT_TYPE.CharacteristicValueChangedEvent,
er, _watchCallback, IntPtr.Zero, out _watchRegisterEventHandle);
if (error != 0)
{
Debug.Assert(error == 0); _watchRegisterEventHandle = IntPtr.Zero;
}
}
}
public override string GetDeviceString(int index)
{
string str;
StringBuilder deviceString = new StringBuilder(256);
var handle = NativeMethods.CreateFileFromDevice(_path, NativeMethods.EFileAccess.None, NativeMethods.EFileShare.Read | NativeMethods.EFileShare.Write);
if (handle != (IntPtr)(-1) && NativeMethods.HidD_GetIndexedString(handle, (ulong)index, deviceString, 256))
{
str = deviceString.ToString();
}
else
{
str = null;
}
NativeMethods.CloseHandle(handle);
return(str);
}
internal void Init(string path)
{
IntPtr handle = NativeMethods.CreateFileFromDevice(path, NativeMethods.EFileAccess.Read | NativeMethods.EFileAccess.Write, NativeMethods.EFileShare.Read | NativeMethods.EFileShare.Write);
if (handle == (IntPtr)(-1))
{
throw DeviceException.CreateIOException(Device, "Unable to open HID class device (" + path + ").");
}
int maxInputBuffers = Environment.OSVersion.Version >= new Version(5, 1) ? 512 : 200; // Windows 2000 supports 200. Windows XP supports 512.
if (!NativeMethods.HidD_SetNumInputBuffers(handle, maxInputBuffers))
{
NativeMethods.CloseHandle(handle);
throw new IOException("Failed to set input buffers.", new Win32Exception());
}
_handle = handle;
HandleInitAndOpen();
}
bool TryOpenToGetInfo(Func <IntPtr, bool> action)
{
var handle = NativeMethods.CreateFileFromDevice(_path, NativeMethods.EFileAccess.None, NativeMethods.EFileShare.Read | NativeMethods.EFileShare.Write);
if (handle == (IntPtr)(-1))
{
return(false);
}
try
{
return(action(handle));
}
catch (Exception e)
{
Debug.WriteLine(e);
}
finally
{
NativeMethods.CloseHandle(handle);
}
return(false);
}
