USB_HOST_AUDIO_V1_EntityRequestCallbackSet Function

This function registers a callback function for the Audio v1.0 control entity requests. The Audio v1.0 Host Client Driver will call this callback function when an audio entity control request is completed.

USB_HOST_AUDIO_V1_RESULT USB_HOST_AUDIO_V1_EntityRequestCallbackSet(
    USB_HOST_AUDIO_V1_OBJ audioDeviceObj, 
    USB_HOST_AUDIO_V1_ENTITY_REQUEST_CALLBACK appAudioEntityRequestCallback, 
    uintptr_t context
);

Preconditions

None.

Parameters

Parameters	Description
audioDeviceObj	Audio v1.0 device object.
appAudioEntityRequestCallback	A pointer to event handler function. If NULL, events will not be generated.
context	Application specific context that is returned in the event handler.

Returns

USB_HOST_AUDIO_V1_RESULT_SUCCESS - The operation was successful
USB_HOST_AUDIO_V1_RESULT_OBJ_INVALID - The specified audio object does not exist
USB_HOST_AUDIO_V1_RESULT_FAILURE - An unknown failure occurred

Remarks

None.

USB Libraries Help > USB Host Libraries > USB Audio v1.0 Host Client Driver Library > Library Interface > a) Audio Device Access Functions > USB_HOST_AUDIO_V1_EntityRequestCallbackSet Function

MPLAB Harmony USB Stack

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