USB HOST DRIVER V03 Freescale Semiconductor / Motorola, USB HOST DRIVER V03 Datasheet - Page 30

• Manufacturer Part Number: USB HOST DRIVER V03
• Description: USB Host Driver v03
• Manufacturer: Freescale Semiconductor / Motorola

3.5.2.
The operation requests Device re-enumeration.
DeviceIoControl parameters:
lpInBuffer
Not used with the operation. Must be NULL.
nInBufferSize
Not used with the operation. Must be 0.
lpOutBuffer
Not used with the operation. Must be NULL.
nOutBufferSize
Not used with the operation. Must be 0.
Comments:
This request has the same effect as disconnecting and connecting a Device to/from the
port. During this operation the MOTUSB Driver should be unloaded and loaded again by
USBDI.
When the USBI unloads the Driver all Device and pipe handles became invalid. The
Client application receives a PnP notification about the Device being removed and should
close all handles to that Device.
During Device re-enumeration the following requests appear on the bus:
NOTE: Additional requests can appear depending on the descriptors for the Device.
After the re-enumeration process, the operating system loads the MOTUSB Driver again.
The Client software receives a PnP notification about the Device being attached and can
reopen the required handles. This request does not work if the system-provided multi-
interface Driver is used. This Driver expects that all functional Device Drivers to send a
CYCLE_PORT
M
Device Reset
GET_DEVICE_DESCRIPTOR
Device Reset
SET_ADDRESS
GET_DEVICE_DESCRIPTOR
GET_CONFIGURATION_DESCRIPTOR
IOCTL_USB_CYCLE_PORT
request within 5 seconds.
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
Programming Interface.
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