FreeRTOS readme

Author: Liya Du

README.md

@@ -85,6 +85,10 @@ Each official release (preview or GA) will be tagged to mark the commit and push
 
 Azure RTOS provides OEMs with components to secure communication and to create code and data isolation using underlying MCU/MPU hardware protection mechanisms. It is ultimately the responsibility of the device builder to ensure the device fully meets the evolving security requirements associated with its specific use case.
 
+# Adaptation layer for ThreadX
+
+Azure RTOS ThreadX is an advanced real-time operating system (RTOS) designed specifically for deeply embedded applications. To help ease application migration to Auzre RTOS, ThreadX provides [adaption layers](https://github.com/azure-rtos/threadx/tree/master/utility/rtos_compatibility_layers) for various legacy RTOS APIs (FreeRTOS, POSIX, OSEK, etc.).
+
 # Licensing
 
 License terms for using Azure RTOS are defined in the LICENSE.txt file of this repo. Please refer to this file for all definitive licensing information. No additional license fees are required for deploying Azure RTOS on hardware defined in the LICENSED-HARDWARE.txt file. If you are using hardware not defined in the LICENSED-HARDWARE.txt file or have licensing questions in general, please contact Microsoft directly at https://azure-rtos.ms-iot-contact.com/

utility/rtos_compatibility_layers/FreeRTOS/readme.md

@@ -1,14 +1,4 @@
-/**************************************************************************/
-/*                                                                        */
-/*       Copyright (c) Microsoft Corporation. All rights reserved.        */
-/*                                                                        */
-/*       This software is licensed under the Microsoft Software License   */
-/*       Terms for Microsoft Azure RTOS. Full text of the license can be  */
-/*       found in the LICENSE file at https://aka.ms/AzureRTOS_EULA       */
-/*       and in the root directory of this software.                      */
-/*                                                                        */
-/**************************************************************************/
-
+# FreeRTOS adaptation layer
 
 Introduction
 ------------