// The following code example shows an example of how the
// USB_DEVICE_ControlStatus() function is called in response to the
// USB_DEVICE_EVENT_CONTROL_TRANSFER_DATA_RECEIVED event to complete the 
// control transfer. Here, the application code acknowledges the status 
// stage of the control transfer.

void APP_USBDeviceControlTransferEventHandler
(
    USB_DEVICE_EVENT event,
    void * data, 
    uintptr_t context
)
{
    USB_SETUP_PACKET * setupPkt;

    switch(event)
    {
        case USB_DEVICE_EVENT_CONTROL_TRANSFER_SETUP_REQUEST:

            setupPkt = (USB_SETUP_PACKET *)pData;
            
            // Submit a buffer to receive 32 bytes in the  control write transfer.
            // USB_DEVICE_ControlReceive(usbDeviceHandle, data, 32); 
            break;

        case USB_DEVICE_EVENT_CONTROL_TRANSFER_DATA_RECEIVED:

            // This means that data in the data stage of the control
            // write transfer has been received. The application can either
            // accept the received data by calling the
            // USB_DEVICE_ControlStatus function with
            // USB_DEVICE_CONTROL_STATUS_OK flag (as shown in this example)
            // or it can reject it by calling the USB_DEVICE_ControlStatus
            // function with USB_DEVICE_CONTROL_STATUS_ERROR flag. 

            USB_DEVICE_ControlStatus(usbDeviceHandle, USB_DEVICE_CONTROL_STATUS_OK);
            break;

        case USB_DEVICE_EVENT_CONTROL_TRANSFER_DATA_SENT:
            
            // This means that data in the data stage of the control
            // read transfer has been sent. This indicates that the control transfer is 
            // completed. 
            break;

        case USB_DEVICE_EVENT_CONTROL_TRANSFER_ABORTED:

            // This means the host has aborted the control transfer. The
            // application can reset its control transfer state machine.
        break;
    }
}