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Extensible Firmware Interface Specification
14-16 12/01/02 Version 1.10
EFI_USB_HC_PROTOCOL.AsyncInterruptTransfer()
Summary
Submits an asynchronous interrupt transfer to an interrupt endpoint of a USB device.
Prototype
typedef
EFI_STATUS
(EFIAPI *EFI_USB_HC_PROTOCOL_ASYNC_INTERRUPT_TRANSFER) (
IN EFI_USB_HC_PROTOCOL *This,
IN UINT8 DeviceAddress,
IN UINT8 EndPointAddress,
IN BOOLEAN IsSlowDevice,
IN UINT8 MaximumPacketLength,
IN BOOLEAN IsNewTransfer,
IN OUT UINT8 *DataToggle,
IN UINTN PollingInterval OPTIONAL,
IN UINTN DataLength OPTIONAL,
IN EFI_ASYNC_USB_TRANSFER_CALLBACK CallBackFunction OPTIONAL,
IN VOID *Context OPTIONAL
);
Parameters
This A pointer to the EFI_USB_HC_PROTOCOL instance. Type
EFI_USB_HC_PROTOCOL is defined in Section 14.1.
DeviceAddress Represents the address of the target device on the USB, which is
assigned during USB enumeration.
EndPointAddress The combination of an endpoint number and an endpoint
direction of the target USB device. Each endpoint address
supports data transfer in one direction except the control
endpoint (whose default endpoint address is zero). It is the
caller’s responsibility to make sure that the
EndPointAddress represents an interrupt endpoint.
IsSlowDevice Indicates whether the target device is slow device or full-speed
device.
MaximumPacketLength Indicates the maximum packet size the target endpoint is capable
of sending or receiving.
IsNewTransfer If TRUE, an asynchronous interrupt pipe is built between the host
and the target interrupt endpoint. If FALSE, the specified
asynchronous interrupt pipe is canceled.