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diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/usbd/app_usbd_string_desc.h b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/usbd/app_usbd_string_desc.h
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+++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/usbd/app_usbd_string_desc.h
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+/**
+ * Copyright (c) 2016 - 2018, Nordic Semiconductor ASA
+ * 
+ * All rights reserved.
+ * 
+ * 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, except as embedded into a Nordic
+ *    Semiconductor ASA integrated circuit in a product or a software update for
+ *    such product, 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. Neither the name of Nordic Semiconductor ASA nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ * 
+ * 4. This software, with or without modification, must only be used with a
+ *    Nordic Semiconductor ASA integrated circuit.
+ * 
+ * 5. Any software provided in binary form under this license must not be reverse
+ *    engineered, decompiled, modified and/or disassembled.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS 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.
+ * 
+ */
+#ifndef APP_USBD_STRING_DESC_H__
+#define APP_USBD_STRING_DESC_H__
+
+#include <stdint.h>
+#include "sdk_common.h"
+#include "app_usbd.h"
+#include "app_usbd_string_config.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @defgroup app_usbd_string_desc USBD string descriptors
+ * @ingroup app_usbd
+ *
+ * @brief @tagAPI52840 USBD string descriptors management.
+ * @{
+ */
+
+/**
+ * @brief USB string initialization
+ *
+ * Macro that creates initialization values for USB string.
+ * The format contains header and string itself.
+ * The string should be declared as an array of uint16_t type.
+ *
+ * @param[in] ... Comma separated string letters or language ID.
+ * @return String descriptor initialization data.
+ */
+#define APP_USBD_STRING_DESC(...) (const uint16_t[]){  \
+    (0xff & (sizeof((uint16_t[]){__VA_ARGS__}) + 2)) | \
+    ((uint16_t)APP_USBD_DESCRIPTOR_STRING) << 8,       \
+    __VA_ARGS__ }
+
+/**
+ * @brief USB string descriptors ID's
+ */
+typedef enum {
+    APP_USBD_STRING_ID_LANGIDS = 0,  /**< Supported language identifiers */
+    APP_USBD_STRING_ID_MANUFACTURER, /**< Manufacturer name */
+    APP_USBD_STRING_ID_PRODUCT,      /**< Product name */
+    APP_USBD_STRING_ID_SERIAL,       /**< Serial number */
+
+#define X(mnemonic, str_idx, ...) mnemonic str_idx,
+    APP_USBD_STRINGS_USER
+#undef X
+
+    APP_USBD_STRING_ID_CNT           /**< Total number of identifiers */
+} app_usbd_string_desc_idx_t;
+
+/**
+ * @brief Get string descriptor
+ *
+ * @param[in] idx    String descriptor index
+ * @param[in] langid Selected language for the string
+ * @return String descriptor or NULL if not exist
+ * */
+uint16_t const * app_usbd_string_desc_get(app_usbd_string_desc_idx_t idx, uint16_t langid);
+
+/**
+ * @brief Get string length
+ *
+ * Function to get string length from descriptor (descriptor returned by @ref app_usbd_string_desc_get)
+ *
+ * @param[in] p_str String descriptor pointer
+ * @return Total descriptor length in bytes
+ */
+static inline size_t app_usbd_string_desc_length(uint16_t const * p_str)
+{
+    return ((const app_usbd_descriptor_string_t *)p_str)->bLength;
+}
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* APP_USBD_STRING_DESC_H__ */