public void ResetDevice()
{
LibUsbRequest req = new LibUsbRequest();
req.Timeout = UsbConstants.DEFAULT_TIMEOUT;
DeviceIoControl(LibUsbIoCtl.RESET_DEVICE, ref req);
}
unsafe int PipeTransfer(Byte epnum, Boolean write, Boolean isochronous, Byte[] buffer, int offset, int length, int packetsize)
{
if (offset < 0 || length < 0 || offset + length > buffer.Length)
{
throw new ArgumentOutOfRangeException("length", "The specified offset and length exceed the buffer length");
}
LibUsbRequest req = new LibUsbRequest();
req.Endpoint.ID = epnum;
req.Endpoint.PacketSize = packetsize;
req.Timeout = UsbConstants.DEFAULT_TIMEOUT;
if (write)
{
int cltCode = isochronous ? LibUsbIoCtl.ISOCHRONOUS_WRITE : LibUsbIoCtl.INTERRUPT_OR_BULK_WRITE;
int transfered = 0;
while (length > 0)
{
int ret = DeviceIoControl(cltCode, ref req, buffer, offset, length);
if (ret <= 0)
{
throw new System.IO.EndOfStreamException();
}
length -= ret;
offset += ret;
transfered += ret;
}
return(transfered);
}
else
{
int cltCode = isochronous ? LibUsbIoCtl.ISOCHRONOUS_READ : LibUsbIoCtl.INTERRUPT_OR_BULK_READ;
return(DeviceIoControl(cltCode, ref req, buffer, offset, length));
}
}
public void ReleaseInterface(int interfaceID)
{
LibUsbRequest req = new LibUsbRequest();
req.Iface.ID = interfaceID;
req.Timeout = UsbConstants.DEFAULT_TIMEOUT;
DeviceIoControl(LibUsbIoCtl.RELEASE_INTERFACE, ref req);
}
unsafe int DeviceIoControl(int code, [In] ref LibUsbRequest request, Byte[] outbuffer, int outoffset, int outsize)
{
Byte[] bytes = new Byte[LibUsbRequest.Size];
fixed(Byte *ptr = bytes) * (LibUsbRequest *)ptr = request;
return(DeviceIoControl(code, bytes, outbuffer, outoffset, outsize));
}
public override void PipeAbort(byte pipeID)
{
LibUsbRequest req = new LibUsbRequest();
req.Endpoint.ID = pipeID;
req.Timeout = UsbConstants.DEFAULT_TIMEOUT;
DeviceIoControl(LibUsbIoCtl.ABORT_ENDPOINT, ref req);
}
public void SetAltInterface(int interfaceID, int alternateID)
{
LibUsbRequest req = new LibUsbRequest();
req.Iface.ID = interfaceID;
req.Iface.AlternateID = alternateID;
req.Timeout = UsbConstants.DEFAULT_TIMEOUT;
DeviceIoControl(LibUsbIoCtl.SET_INTERFACE, ref req);
}
public unsafe override int GetDescriptor(byte descriptorType, byte index, short langId, byte[] buffer, int offset, int length)
{
if (offset < 0 || length < 0 || offset + length > buffer.Length)
{
throw new ArgumentOutOfRangeException("length", "The specified offset and length exceed the buffer length");
}
LibUsbRequest req = new LibUsbRequest();
req.Descriptor.Index = index;
req.Descriptor.LangID = langId;
req.Descriptor.Recipient = (byte)UsbEndpointDirection.EndpointIn & 0x1F;
req.Descriptor.Type = descriptorType;
req.Timeout = UsbConstants.DEFAULT_TIMEOUT;
return(DeviceIoControl(LibUsbIoCtl.GET_DESCRIPTOR, ref req, buffer, offset, length));
}
void DeviceIoControl(int code, [In] ref LibUsbRequest request)
{
DeviceIoControl(code, ref request, null, 0, 0);
}
void PrepareControlTransfer(UsbControlRequestType requestType, byte request, short value, short index, int length, ref LibUsbRequest req, out int code)
{
code = LibUsbIoCtl.CONTROL_TRANSFER;
req.Timeout = UsbConstants.DEFAULT_TIMEOUT;
req.Control.RequestType = (Byte)requestType;
req.Control.Request = request;
req.Control.Value = (ushort)value;
req.Control.Index = (ushort)index;
req.Control.Length = (ushort)length;
switch ((UsbControlRequestType)((int)requestType & (0x03 << 5)))
{
case UsbControlRequestType.TypeStandard:
switch ((UsbStandardRequest)request)
{
case UsbStandardRequest.GetStatus:
req.Status.Recipient = (int)requestType & 0x1F;
req.Status.Index = index;
code = LibUsbIoCtl.GET_STATUS;
break;
case UsbStandardRequest.ClearFeature:
req.Feature.Recipient = (int)requestType & 0x1F;
req.Feature.ID = value;
req.Feature.Index = index;
code = LibUsbIoCtl.CLEAR_FEATURE;
break;
case UsbStandardRequest.SetFeature:
req.Feature.Recipient = (int)requestType & 0x1F;
req.Feature.ID = value;
req.Feature.Index = index;
code = LibUsbIoCtl.SET_FEATURE;
break;
case UsbStandardRequest.GetDescriptor:
req.Descriptor.Recipient = (int)requestType & 0x1F;
req.Descriptor.Type = (value >> 8) & 0xFF;
req.Descriptor.Index = value & 0xFF;
req.Descriptor.LangID = index;
code = LibUsbIoCtl.GET_DESCRIPTOR;
break;
case UsbStandardRequest.SetDescriptor:
req.Descriptor.Recipient = (int)requestType & 0x1F;
req.Descriptor.Type = (value >> 8) & 0xFF;
req.Descriptor.Index = value & 0xFF;
req.Descriptor.LangID = index;
code = LibUsbIoCtl.SET_DESCRIPTOR;
break;
case UsbStandardRequest.GetConfiguration:
code = LibUsbIoCtl.GET_CONFIGURATION;
break;
case UsbStandardRequest.SetConfiguration:
req.Config.ID = value;
code = LibUsbIoCtl.SET_CONFIGURATION;
break;
case UsbStandardRequest.GetInterface:
req.Iface.ID = index;
code = LibUsbIoCtl.GET_INTERFACE;
break;
case UsbStandardRequest.SetInterface:
req.Iface.ID = index;
req.Iface.AlternateID = value;
code = LibUsbIoCtl.SET_INTERFACE;
break;
default:
throw new ArgumentException(String.Format("Invalid request: 0x{0:X8}", request));
}
break;
case UsbControlRequestType.TypeVendor:
case UsbControlRequestType.TypeClass:
req.Vendor.Type = ((byte)requestType >> 5) & 0x03;
req.Vendor.Recipient = (int)requestType & 0x1F;
req.Vendor.Request = (int)request;
req.Vendor.ID = value;
req.Vendor.Index = index;
code = ((byte)requestType & 0x80) != 0 ? LibUsbIoCtl.VENDOR_READ : LibUsbIoCtl.VENDOR_WRITE;
break;
case UsbControlRequestType.TypeReserved:
default:
throw new ArgumentException(String.Format("Invalid or unsupported request type: 0x{0:X8}", requestType));
}
}
