Universal USB Device Driver (USBIO)
Programming Interface
USB08 Evaluation Board Designer Reference Manual
MOTOROLA Universal USB Device Driver (USBIO) 159
IOCTL_USBIO_SET_CONFIGURATION
The IOCTL_USBIO_SET_CONFIGURATION operation is used to set
the device configuration.
lpInBuffer Pointer to a buffer that contains an USBIO_SET_CONFIGURATION
(page 195) data structure. This data structure has t o be f illed compl etely
by the caller.
nInBufferSize Specifies the size, in bytes, of the buffer pointed to by lpInBuffer,
which has to be sizeof(USBIO_SET_CONFIGURATION) for this
operation.
lpOutBuffer Not used with this operation. Set to NULL.
nOutBufferSize Not used with this operation. Set to zero.
Comments A SET_CONFIGURATION request appears on the bus. The USBD
generates additional SET_INTERFACE requests on the bus if
necessary.
All available interfaces have to be configured, or the request will fail. The
number of interfaces and the alternate setting for each interface have to
be specified in the structure USBIO_SET_CONFIGURATION
(page 195).
All pipe handles associated with the device will be unbound and all
pending requests will be cancelled. If this request returns with success,
new pipe objects are available. The operation
IOCTL_USBIO_GET_CONFIGURATION_INFO (page 166) may be
used to query all available pipes and interfaces.
By default, the configuration descriptor that is reported by the device is
passed to the USBD. If an user-defined configuration descriptor is stored
with IOCTL_USBIO_STORE_CONFIG_DESCRIPTOR (page 158), this
descriptor is used.