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diff --git a/Marlin/src/HAL/DUE/usb/usb_task.h b/Marlin/src/HAL/DUE/usb/usb_task.h
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+/**
+ * \file
+ *
+ * \brief Declaration of main function used by Composite example 4
+ *
+ * Copyright (c) 2011-2015 Atmel Corporation. All rights reserved.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * 3. The name of Atmel may not be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * 4. This software may only be redistributed and used in connection with an
+ *    Atmel microcontroller product.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * \asf_license_stop
+ *
+ */
+/*
+ * Support and FAQ: visit <a href="https://www.atmel.com/design-support/">Atmel Support</a>
+ */
+
+#ifndef _USB_TASK_H_
+#define _USB_TASK_H_
+
+#include "usb_protocol_cdc.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*! \brief Called by MSC interface
+ * Callback running when USB Host enable MSC interface
+ *
+ * \retval true if MSC startup is ok
+ */
+bool usb_task_msc_enable(void);
+
+/*! \brief Called by MSC interface
+ * Callback running when USB Host disable MSC interface
+ */
+void usb_task_msc_disable(void);
+
+/*! \brief Opens the communication port
+ * This is called by CDC interface when USB Host enable it.
+ *
+ * \retval true if cdc startup is successfully done
+ */
+bool usb_task_cdc_enable(const uint8_t port);
+
+/*! \brief Closes the communication port
+ * This is called by CDC interface when USB Host disable it.
+ */
+void usb_task_cdc_disable(const uint8_t port);
+
+/*! \brief Save new DTR state to change led behavior.
+ * The DTR notify that the terminal have open or close the communication port.
+ */
+void usb_task_cdc_set_dtr(const uint8_t port, const bool b_enable);
+
+/*! \brief Check if MSC is enumerated and configured on the PC side
+ */
+bool usb_task_msc_isenabled(void);
+
+/*! \brief Check if CDC is enumerated and configured on the PC side
+ */
+bool usb_task_cdc_isenabled(void);
+
+/*! \brief Check if CDC is actually OPEN by an application on the PC side
+ *  assuming DTR signal means a program is listening to messages
+ */
+bool usb_task_cdc_dtr_active(void);
+
+/*! \brief Called by UDC when USB Host request a extra string different
+ * of this specified in USB device descriptor
+ */
+bool usb_task_extra_string(void);
+
+/*! \brief Called by UDC when USB Host performs unknown requests
+ */
+bool usb_task_other_requests(void);
+
+/*! \brief Called by CDC interface
+ * Callback running when CDC device have received data
+ */
+void usb_task_cdc_rx_notify(const uint8_t port);
+
+/*! \brief Configures communication line
+ *
+ * \param cfg      line configuration
+ */
+void usb_task_cdc_config(const uint8_t port, usb_cdc_line_coding_t *cfg);
+
+/*! \brief The USB device interrupt
+ */
+void USBD_ISR(void);
+
+/*! \brief USB task init
+ */
+void usb_task_init(void);
+
+/*! \brief USB task idle
+ */
+void usb_task_idle(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // _USB_TASK_H_