protected unsafe static string GetStringDescriptor(USBPort port, Byte stringIndex)
{
UsbApi.UsbNativeType.USB_DESCRIPTOR_REQUEST descriptor = new UsbApi.UsbNativeType.USB_DESCRIPTOR_REQUEST();
descriptor.ConnectionIndex = port.portIndex;
// USBD will automatically initialize these fields:
// bmRequest = 0x80
// bRequest = 0x06
// wValue = Descriptor Type (high) and Descriptor Index (low byte)
descriptor.wValue = (ushort)(((ushort)UsbApi.UsbNativeType.UsbDescriptorType.USB_STRING_DESCRIPTOR_TYPE << 8) | (ushort)stringIndex);
// wIndex = Zero (or Language ID for String Descriptors)
descriptor.wIndex = (ushort)0;
// wLength = Length of descriptor buffer
descriptor.wLength = (ushort)Marshal.SizeOf(typeof(UsbApi.UsbNativeType.USB_STRING_DESCRIPTOR));
// Collect the information string
IOCTLcommand ioctl = new IOCTLcommand();
ioctl.ioctlNo = UsbApi.CTL_CODE(0x00000022, (uint)UsbApi.UsbIoctlFunction.USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION, 0, 0x0);
ioctl.inputBuffer = UsbApi.UsbNativeType.Serialize(descriptor);
ioctl.outputMaxSize = (uint)Marshal.SizeOf(descriptor);
string result = null;
try {
// Open Root hub
IntPtr hHub = UsbApi.OpenDevice(port.rootHub.devicePath, true);
IoStatus status = UsbApi.DeviceIoControl(hHub, ioctl);
UsbApi.CloseDevice(hHub);
descriptor = (UsbApi.UsbNativeType.USB_DESCRIPTOR_REQUEST)UsbApi.UsbNativeType.Deserialize(
status.buffer, 0, typeof(UsbApi.UsbNativeType.USB_DESCRIPTOR_REQUEST));
UsbApi.UsbNativeType.USB_STRING_DESCRIPTOR strDescr = (UsbApi.UsbNativeType.USB_STRING_DESCRIPTOR)UsbApi.UsbNativeType.Deserialize(
descriptor.Data, 0, typeof(UsbApi.UsbNativeType.USB_STRING_DESCRIPTOR));
result = new String(Encoding.Unicode.GetChars(strDescr.bString, 0, strDescr.bLength));
}
catch (Exception) { result = "Invalid string value"; }
return(result);
}
internal unsafe static List <UsbApi.UsbNativeType.IUSB_COMMON_DESCRIPTOR> GetConfigurationDescriptors(USBPort port, Byte configIndex)
{
UsbApi.UsbNativeType.USB_DESCRIPTOR_REQUEST descriptor = new UsbApi.UsbNativeType.USB_DESCRIPTOR_REQUEST();
descriptor.ConnectionIndex = port.portIndex;
// USBD will automatically initialize these fields:
// bmRequest = 0x80
// bRequest = 0x06
// wValue = Descriptor Type (high) and Descriptor Index (low byte)
descriptor.wValue = (ushort)(((ushort)UsbApi.UsbNativeType.UsbDescriptorType.USB_CONFIGURATION_DESCRIPTOR_TYPE << 8) | (ushort)configIndex);
// wIndex = Zero (or Language ID for String Descriptors)
descriptor.wIndex = (ushort)0;
// wLength = Length of descriptor buffer
descriptor.wLength = (ushort)512;
// Collect the information string
IOCTLcommand ioctl = new IOCTLcommand();
ioctl.ioctlNo = UsbApi.CTL_CODE(0x00000022, (uint)UsbApi.UsbIoctlFunction.USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION, 0, 0x0);
ioctl.inputBuffer = UsbApi.UsbNativeType.Serialize(descriptor);
ioctl.outputMaxSize = (uint)Marshal.SizeOf(descriptor);
List <UsbApi.UsbNativeType.IUSB_COMMON_DESCRIPTOR> descriptorList = new List <UsbApi.UsbNativeType.IUSB_COMMON_DESCRIPTOR>();
try
{
// Open Root hub
IntPtr hHub = UsbApi.OpenDevice(port.rootHub.devicePath, true);
IoStatus status = UsbApi.DeviceIoControl(hHub, ioctl);
UsbApi.CloseDevice(hHub);
descriptor = (UsbApi.UsbNativeType.USB_DESCRIPTOR_REQUEST)UsbApi.UsbNativeType.Deserialize(
status.buffer, 0, typeof(UsbApi.UsbNativeType.USB_DESCRIPTOR_REQUEST));
UsbApi.UsbNativeType.USB_CONFIGURATION_DESCRIPTOR confDescr = (UsbApi.UsbNativeType.USB_CONFIGURATION_DESCRIPTOR)UsbApi.UsbNativeType.Deserialize(
descriptor.Data, 0, typeof(UsbApi.UsbNativeType.USB_CONFIGURATION_DESCRIPTOR));
descriptorList.Add(confDescr);
// Now deserialize all returned descriptors
int descrStart = confDescr.bLength;
UsbApi.UsbNativeType.IUSB_COMMON_DESCRIPTOR common;
while (descrStart < confDescr.wTotalLength)
{
common = (UsbApi.UsbNativeType.IUSB_COMMON_DESCRIPTOR)UsbApi.UsbNativeType.Deserialize(
descriptor.Data, descrStart, typeof(UsbApi.UsbNativeType.USB_COMMON_DESCRIPTOR));
switch (common.DescriptorType)
{
case UsbApi.UsbNativeType.UsbDescriptorType.USB_CONFIGURATION_DESCRIPTOR_TYPE:
common = (UsbApi.UsbNativeType.IUSB_COMMON_DESCRIPTOR)UsbApi.UsbNativeType.Deserialize(
descriptor.Data, descrStart, typeof(UsbApi.UsbNativeType.USB_CONFIGURATION_DESCRIPTOR));
break;
case UsbApi.UsbNativeType.UsbDescriptorType.USB_INTERFACE_DESCRIPTOR_TYPE:
common = (UsbApi.UsbNativeType.IUSB_COMMON_DESCRIPTOR)UsbApi.UsbNativeType.Deserialize(
descriptor.Data, descrStart, typeof(UsbApi.UsbNativeType.USB_INTERFACE_DESCRIPTOR));
break;
case UsbApi.UsbNativeType.UsbDescriptorType.USB_ENDPOINT_DESCRIPTOR_TYPE:
common = (UsbApi.UsbNativeType.IUSB_COMMON_DESCRIPTOR)UsbApi.UsbNativeType.Deserialize(
descriptor.Data, descrStart, typeof(UsbApi.UsbNativeType.USB_ENDPOINT_DESCRIPTOR));
break;
}
descrStart += common.Length;
descriptorList.Add(common);
}
}
catch (Exception) {}
return(descriptorList);
}
