NXP Semiconductors LPC43 Series User Manual

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NXP Semiconductors LPC43 Series User Manual Manual pdf 665 page image

UM10503 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved.User manual Rev. 1.3 — 6 July 2012 665 of 1269NXP Semiconductors UM10503Chapter 25: LPC43xx USB API25.5.34 USBD_HW_APIHardware API functions structure.This module exposes functions which interact directlywith USB device controller hardware.HID_Ep0_Hdlr ErrorCode_t(*ErrorCode_t(* USBD_HID_INIT_PARAM::HID_Ep0_Hdlr)(USBD_HANDLE_T hUsb, void *data, uint32_tevent))(USBD_HANDLE_T hUsb, void *data, uint32_t event)Optional user over-ridable function to replace the default HID class handler.The application software could override the default EP0 class handler with their own by providing thehandler function address as this data member of the parameter structure. Application which like thedefault handler should set this data member to zero before calling the USBD_HID_API::Init().Remark:Parameters:1. hUsb = Handle to the USB device stack.2. data = Pointer to the data which will be passed when callback function is called by the stack.3. event = Type of endpoint event. See USBD_EVENT_T for more details.Returns:The call back should returns ErrorCode_t type to indicate success or error condition.Return values:1. LPC_OK = On success.2. ERR_USBD_UNHANDLED = Event is not handled hence pass the event to next in line.3. ERR_USBD_xxx = For other error conditions.Table 525. USBD_HID_INIT_PARAM class structureMember Description