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USB Library Reference

Functions arranged by category

The USB functions may be grouped into these categories:

usbd_alloc(): Allocate memory area to use for data transfers.
usbd_free(): Free memory allocated by usbd_alloc().
usbd_mphys(): Get the physical address of memory allocated by usbd_alloc().
usbd_alloc_urb(): Allocate a USB Request Block for subsequent URB-based operations.
usbd_free_urb(): Free the URB allocated by usbd_alloc_urb().

usbd_open_pipe(): Initialize the pipe described by the device or endpoint descriptor.
usbd_close_pipe(): Close a pipe previously opened by the usbd_open_pipe() function.
usbd_reset_pipe(): Clear a stall condition on an endpoint identified by the pipe handle.
usbd_abort_pipe(): Abort all requests on a pipe.
usbd_pipe_device(): Retrieve the device associated with the pipe.
usbd_pipe_endpoint(): Retrieve the endpoint number associated with the pipe.

usbd_args_lookup(): Look up a driver's command-line arguments.
usbd_configuration_descriptor(): Get the configuration descriptor for a specific configuration setting.
usbd_device_lookup(): Map the device instance identifier to an opaque device handle (from usbd_attach()).
usbd_device_extra(): Retrieve a pointer to the device-specific extra memory allocated by usbd_attach().
usbd_device_descriptor(): Get the device descriptor for a specific device.
usbd_endpoint_descriptor(): Get the endpoint descriptor for a specific endpoint setting.
usbd_get_frame(): Get the current frame number and frame length for a device.
usbd_hcd_info(): Get information on the USB host controller and SDK library.
usbd_hub_descriptor(): Get the hub descriptor for a specific (hub) device.
usbd_interface_descriptor(): Get the interface descriptor for a specific interface setting.
usbd_languages_descriptor(): Get the table of supported LANGIDs for the given device.
usbd_parse_descriptors(): Parse device descriptors looking for a specific entry.
usbd_reset_device(): Reset a USB device.
usbd_string(): Get a string descriptor.
usbd_urb_status(): Return status information on a URB.
usbd_topology(): Get the USB bus physical topology.