UsbDeviceControlRead Method

Initiates a USB control transfer that reads data from the USB device.

Namespace: WinUsbNet
Assembly: WinUsbNet (in WinUsbNet.dll) Version: 1.0.0.0 (1.0.0.0)

Syntax

public byte[] ControlRead(
	byte bmRequestType,
	byte bRequest,
	ushort wValue,
	ushort wIndex,
	ushort wLength
)

Public Function ControlRead ( 
	bmRequestType As Byte,
	bRequest As Byte,
	wValue As UShort,
	wIndex As UShort,
	wLength As UShort
) As Byte()

public:
array<unsigned char>^ ControlRead(
	unsigned char bmRequestType, 
	unsigned char bRequest, 
	unsigned short wValue, 
	unsigned short wIndex, 
	unsigned short wLength
)

Parameters

bmRequestType: Type: SystemByte
The USB bmRequestTypefield.
bRequest: Type: SystemByte
The USB bRequestfield.
wValue: Type: SystemUInt16
The USB wValuefield.
wIndex: Type: SystemUInt16
The USB wIndexfield.
wLength: Type: SystemUInt16
The USB wLengthfield.

Return Value

Type: Byte

A byte array containing the bytes read from the USB device.

Exceptions

Exception	Condition
IOException	The UsbDevice is not open.
Win32Exception	An error was reported by the operating system.

Remarks

The arguments of this method correspond precisely with the like-named fields of a USB Setup packet. See the USB specification for the meaning and use of these parameters.

The wLength parameter is the maximum number of bytes to read from the USB device, and the USB device may send less. The length of the returned byte array is the actual number of bytes received.

Reference

UsbDevice Class

WinUsbNet Namespace

UsbDeviceAddLanguageSpecificTextSet("LST87A33366_0?cpp=::|nu=.");ControlRead Method

Parameters

Return Value

Reference

UsbDeviceControlRead Method