update rtt to rev 25842

Author: hathach

lib/SEGGER_RTT/RTT/SEGGER_RTT_Conf.h renamed to lib/SEGGER_RTT/Config/SEGGER_RTT_Conf.h

@@ -0,0 +1,36 @@
+
+                    SEGGER Microcontroller GmbH
+                       The Embedded Experts
+
+           (c) 1995 - 2021 SEGGER Microcontroller GmbH
+          www.segger.com     Support: [email protected]
+
+        SEGGER RTT  Real Time Transfer for embedded targets
+
+
+    All rights reserved.
+
+    SEGGER strongly recommends to not make any changes
+    to or modify the source code of this software in order to stay
+    compatible with the RTT protocol and J-Link.
+
+    Redistribution and use in source and binary forms, with or
+    without modification, are permitted provided that the following
+    condition is met:
+
+    - Redistributions of source code must retain the above copyright
+     notice, this condition and the following disclaimer.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+    CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+    INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+    MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+    DISCLAIMED. IN NO EVENT SHALL SEGGER Microcontroller 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.

lib/SEGGER_RTT/LICENSE.md

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+RTT
+===
+
+SEGGER RTT Sources
+
+https://www.segger.com/products/debug-probes/j-link/technology/about-real-time-transfer
+https://wiki.segger.com/RTT
+
+## Included files
+
+  * `RTT/`
+    * `SEGGER_RTT.c`               - Main module for RTT.
+    * `SEGGER_RTT.h`               - Main header for RTT.
+    * `SEGGER_RTT_ASM_ARMv7M.S`    - Assembly-optimized implementation of RTT functions for ARMv7M processors.
+    * `SEGGER_RTT_Printf.c`        - Simple implementation of printf (`SEGGER_RTT_Printf()`) to write formatted strings via RTT.
+  * `Syscalls/`
+    * `SEGGER_RTT_Syscalls_*.c`    - Low-level syscalls to retarget `printf()` to RTT with different toolchains.
+  * `Config/`
+    * `SEGGER_RTT_Conf.h`          - RTT configuration file.
+  * `Examples/`
+    * `Main_RTT_InputEchoApp.c`    - Example application which echoes input on Channel 0.
+    * `Main_RTT_MenuApp.c`         - Example application to demonstrate RTT bi-directional functionality.
+    * `Main_RTT_PrintfTest.c`      - Example application to test RTT's simple printf implementation.
+    * `Main_RTT_SpeedTestApp.c`    - Example application to measure RTT performance. (Requires embOS)