/// <summary>
/// Try to find devices by Vendor Id and Product Id
/// </summary>
/// <param name="vid">Vendor Id. Set pid to 0 to find devices with any Product Id</param>
/// <param name="pid">Product Id. Set vid and pid to 0 to find any devices</param>
/// <returns></returns>
public List <HidDevice> SearchDevices(int vid, int pid)
{
var devices = new List <HidDevice>();
var devicesLinkedList = HidApi.hid_enumerate((ushort)vid, (ushort)pid);
devicesEnumerations.Add(devicesLinkedList);
if (devicesLinkedList == IntPtr.Zero)
{
return(devices);
}
hid_device_info deviceInfo =
#if NET40
(hid_device_info)Marshal.PtrToStructure(devicesLinkedList, typeof(hid_device_info));
#endif
#if NETSTANDARD2_0
Marshal.PtrToStructure <hid_device_info>(devicesLinkedList);
#endif
devices.Add(new HidDevice(deviceInfo, devicesLinkedList));
while (deviceInfo.next != IntPtr.Zero && devices.Count < MAX_DEVICE_COUNT)
{
var ptr = deviceInfo.next;
deviceInfo =
#if NET40
(hid_device_info)Marshal.PtrToStructure(deviceInfo.next, typeof(hid_device_info));
#endif
#if NETSTANDARD2_0
Marshal.PtrToStructure <hid_device_info>(deviceInfo.next);
#endif
devices.Add(new HidDevice(deviceInfo, ptr));
}
if (devices.Count >= MAX_DEVICE_COUNT)
{
throw new Exception($"device max number was reached while enumerating devices - {MAX_DEVICE_COUNT}");
}
return(devices);
}
internal HidDevice(hid_device_info deviceInfo, IntPtr devicePtr)
{
m_DeviceInfo = deviceInfo;
m_DevicePtr = devicePtr;
}