UM10462 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2016. All rights reserved.
User manual Rev. 5.5 — 21 December 2016 190 of 523
NXP Semiconductors
UM10462
Chapter 10: LPC11U3x/2x/1x USB on-chip drivers
GetCommFeature
ErrorCode_t(* USBD_CDC_INIT_PARAM::GetCommFeature)(USBD_HANDLE_T hCDC, uint16_t feature,
uint8_t **pBuffer, uint16_t *len)
Abstract control model(ACM) subclass specific GET_COMM_FEATURE request call-back
function.
This function is provided by the application software. This function gets called when host
sends a GET_ENCAPSULATED_RESPONSE request.
Parameters:
1. hCdc = Handle to CDC function driver.
2. feature = Communication feature type.
3. buffer = Pointer to a pointer of data buffer containing current settings for the
communication feature. Pointer-to-pointer is used to implement zero-copy buffers.
4. len = Amount of data to be sent back to host.
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 202. USBD_CDC_INIT_PARAM class structure
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