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UM10503
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User manual
Rev. 2.1 — 10 December 2015
805 of 1441
NXP Semiconductors
UM10503
Chapter 27: LPC43xx/LPC43Sxx USB API
27.5.34 USBD_HW_API
Hardware API functions structure.This module exposes functions which interact directly
with USB device controller hardware.
HID_Ep0_Hdlr
ErrorCode_t(* USBD_HID_INIT_PARAM::HID_Ep0_Hdlr)(USBD_HANDLE_T hUsb, void *data, uint32_t event)
Optional user overridable function to replace the default HID class handler.
The application software could override the default EP0 class handler with their own by providing the
handler function address as this data member of the parameter structure. Application which like the
default 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 595. USBD_HID_INIT_PARAM class structure
Member
Description