usbd_io()

Submit a previously set-up URB to the USB stack

Synopsis:

#include <sys/usbdi.h>

int usbd_io( struct usbd_urb *urb, 
             struct usbd_pipe *pipe, 
             void (*func)(struct usbd_urb *,
                          struct usbd_pipe *, void *),
             void *handle,
             uint32_t timeout );

Arguments:

urb: A pointer to a USB Request Block.
pipe: An opaque handle returned by usbd_open_pipe().
func: Callback at I/O completion, given URB, pipe, plus handle.
handle: User data.
timeout: A value (in milliseconds) or USBD_TIME_DEFAULT or USBD_TIME_INFINITY.

Library:

libusbdi

Description:

This routine submits a previously set-up URB to the USB stack. The URB would have been set up from one of these functions:

For this release of the USB DDK, vendor requests are synchronous only. Therefore, the func parameter in usbd_io() must be NULL.

The usbd_io() function is the one that actually makes the data transfer happen; the setup functions simply set up the URB for the data transfer.

Returns:

EAGAIN: The device has been reset.
EBADF: Improper usbd_connect() call.
EMLINK: Too many URB links.
ENODEV: The device was removed.
ENOENT: The requested URB couldn't be found in the stack side. For example, the configuration, interface, or endpoint wasn't present, or it wasn't in the correct state.
ENOSPC: Not enough transmission buffers.
EOK: Success.

Classification:

QNX Neutrino, QNX 4

Safety:
Cancellation point	Yes
Interrupt handler	No
Signal handler	No
Thread	Yes