Control Requests; E.5.2 Control Requests - Motorola USB08 Reference Manual

Universal USB Device Driver (USBIO)

E.5.2 Control Requests

Designer Reference Manual
150
This section provides a detailed description of the I/O Control operations
the USBIO driver supports through its programming interface. The I/O
Control requests are submitted to the driver using the Win32 function
DeviceIoControl (see
function is defined as follows:
BOOL DeviceIoControl (
HANDLE hDevice,
DWORD dwIoControlCode,
LPVOID lpInBuffer,
DWORD nInBufferSize,
LPVOID lpOutBuffer,
DWORD nOutBufferSize,
LPDWORD lpBytesReturned, // pointer to variable to receive
LPOVERLAPPED lpOverlapped // pointer to overlapped structure
);
Refer to the Microsoft Platform SDK documentation for more
information.
The following sections describe the I/O Control codes that may be
passed to the DeviceIoControl function as dwIoControlCode and
the parameters required for lpInBuffer, nInBufferSize,
lpOutBuffer, nOutBufferSize.
Universal USB Device Driver (USBIO)
E.4 Architecture). The DeviceIoControl
// handle to device of interest
// control code of operation to perform
// pointer to buffer to supply input data
// size of input buffer
// pointer to buffer to receive output data
// size of output buffer
// output byte count
// for asynchronous operation
USB08 Evaluation Board
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