/* open hid device */
public bool Open(HIDInfo dev)
{
/* safe file handle */
SafeFileHandle shandle;
/* opens hid device file */
handle = Native.CreateFile(dev.Path,
Native.GENERIC_READ | Native.GENERIC_WRITE,
Native.FILE_SHARE_READ | Native.FILE_SHARE_WRITE,
IntPtr.Zero, Native.OPEN_EXISTING, Native.FILE_FLAG_OVERLAPPED,
IntPtr.Zero);
/* whops */
if (handle == Native.INVALID_HANDLE_VALUE)
{
return(false);
}
/* build up safe file handle */
shandle = new SafeFileHandle(handle, false);
/* prepare stream - async */
_fileStream = new FileStream(shandle, FileAccess.ReadWrite,
32, true);
/* report status */
return(true);
}
/* open hid device */
public bool Open(HIDInfo dev)
{
/* safe file handle */
SafeFileHandle shandle;
/* opens hid device file */
handle = Native.CreateFile(dev.Path,
Native.GENERIC_READ | Native.GENERIC_WRITE,
Native.FILE_SHARE_READ | Native.FILE_SHARE_WRITE,
IntPtr.Zero, Native.OPEN_EXISTING, Native.FILE_FLAG_OVERLAPPED,
IntPtr.Zero);
/* whops */
if (handle == Native.INVALID_HANDLE_VALUE) {
return false;
}
/* build up safe file handle */
shandle = new SafeFileHandle(handle, false);
/* prepare stream - async */
_fileStream = new FileStream(shandle, FileAccess.ReadWrite,
32, true);
/* report status */
return true;
}
/* browse all HID class devices */
public static List<HIDInfo> Browse()
{
/* hid device class guid */
Guid gHid;
/* list of device information */
List<HIDInfo> info = new List<HIDInfo>();
/* obtain hid guid */
Native.HidD_GetHidGuid(out gHid);
/* get list of present hid devices */
var hInfoSet = Native.SetupDiGetClassDevs(ref gHid, null, IntPtr.Zero,
Native.DIGCF_DEVICEINTERFACE | Native.DIGCF_PRESENT);
/* allocate mem for interface descriptor */
var iface = new Native.DeviceInterfaceData();
/* set size field */
iface.Size = Marshal.SizeOf(iface);
/* interface index */
uint index = 0;
/* iterate through all interfaces */
while (Native.SetupDiEnumDeviceInterfaces(hInfoSet, 0, ref gHid,
index, ref iface)) {
/* vid and pid */
short vid, pid;
/* get device path */
var path = GetPath(hInfoSet, ref iface);
/* open device */
var handle = Open(path);
/* device is opened? */
if (handle != Native.INVALID_HANDLE_VALUE) {
/* get device manufacturer string */
var man = GetManufacturer(handle);
/* get product string */
var prod = GetProduct(handle);
/* get serial number */
var serial = GetSerialNumber(handle);
/* get vid and pid */
GetVidPid(handle, out vid, out pid);
/* build up a new element */
HIDInfo i = new HIDInfo(prod, serial, man, path, vid, pid);
/* add to list */
info.Add(i);
/* close */
Close(handle);
}
/* next, please */
index++;
}
/* clean up */
if (Native.SetupDiDestroyDeviceInfoList(hInfoSet) == false) {
/* fail! */
throw new Win32Exception();
}
/* return list */
return info;
}
/* browse all HID class devices */
public static List <HIDInfo> Browse()
{
/* hid device class guid */
Guid gHid;
/* list of device information */
List <HIDInfo> info = new List <HIDInfo>();
/* obtain hid guid */
Native.HidD_GetHidGuid(out gHid);
/* get list of present hid devices */
var hInfoSet = Native.SetupDiGetClassDevs(ref gHid, null, IntPtr.Zero,
Native.DIGCF_DEVICEINTERFACE | Native.DIGCF_PRESENT);
/* allocate mem for interface descriptor */
var iface = new Native.DeviceInterfaceData();
/* set size field */
iface.Size = Marshal.SizeOf(iface);
/* interface index */
uint index = 0;
/* iterate through all interfaces */
while (Native.SetupDiEnumDeviceInterfaces(hInfoSet, 0, ref gHid,
index, ref iface))
{
/* vid and pid */
short vid, pid;
/* get device path */
var path = GetPath(hInfoSet, ref iface);
/* open device */
var handle = Open(path);
/* device is opened? */
if (handle != Native.INVALID_HANDLE_VALUE)
{
/* get device manufacturer string */
var man = GetManufacturer(handle);
/* get product string */
var prod = GetProduct(handle);
/* get serial number */
var serial = GetSerialNumber(handle);
/* get vid and pid */
GetVidPid(handle, out vid, out pid);
/* build up a new element */
HIDInfo i = new HIDInfo(prod, serial, man, path, vid, pid);
/* add to list */
info.Add(i);
/* close */
Close(handle);
}
/* next, please */
index++;
}
/* clean up */
if (Native.SetupDiDestroyDeviceInfoList(hInfoSet) == false)
{
/* fail! */
throw new Win32Exception();
}
/* return list */
return(info);
}
