Note
Access to this page requires authorization. You can try signing in or changing directories.
Access to this page requires authorization. You can try changing directories.
The following table lists and describes all of the I/O Control Codes recognized by the kernel-mode still image driver for USB buses.
| I/O control code | Description |
|---|---|
| IOCTL_CANCEL_IO | Cancels activity on the specified USB transfer pipe. |
| IOCTL_GET_CHANNEL_ALIGN_RQST | Returns a USB device's maximum packet size for the read, write, and interrupt transfer pipes. |
| IOCTL_GET_DEVICE_DESCRIPTOR | Returns vendor and device identifiers. |
| IOCTL_GET_PIPE_CONFIGURATION | Returns a description of every transfer pipe supported for a device. |
| IOCTL_GET_USB_DESCRIPTOR | Returns a specified USB Descriptor. |
| IOCTL_GET_VERSION | Returns the version number of the driver. |
| IOCTL_READ_REGISTERS | Reads from USB device registers, using the control pipe. |
| IOCTL_RESET_PIPE | Resets the specified USB transfer pipe. |
| IOCTL_SEND_USB_REQUEST | Sends a vendor-defined request to a USB device, using the control pipe, and optionally sends or receives additional data. |
| IOCTL_SET_TIMEOUT | Sets the time-out value for USB bulk IN, bulk OUT, or interrupt pipe access. |
| IOCTL_WAIT_ON_DEVICE_EVENT | Returns information about an event occurring on a USB interrupt pipe. |
| IOCTL_WRITE_REGISTERS | Writes to USB device registers, using the control pipe. |
These codes are defined in usbscan.h. For more information about these I/O control codes see: