[add] 瑞萨RA6M4开发板对SEGGER-RTT作为console的使用文档 (#6512)

* [add] 新增README文档说明

瑞萨RA6M4开发板对segger_rtt使用通知

* Update README.md

Co-authored-by: Man, Jianting (Meco) <[email protected]>

3 files changed, 9 insertions, 1 deletions

diff --git a/bsp/renesas/ra6m4-cpk/README.md b/bsp/renesas/ra6m4-cpk/README.md
index a327e24b0f..1432a04379 100644
--- a/bsp/renesas/ra6m4-cpk/README.md
+++ b/bsp/renesas/ra6m4-cpk/README.md
@@ -174,6 +174,14 @@ void hal_entry(void)
 3. 输入`pkgs --update`命令更新软件包。
 4. 输入`scons --target=mdk5` 命令重新生成工程。
 
+**SEGGER_RTT使用**
+
+由于瑞萨RA6M4的串口使用需要使用USB转TTL工具，使用起来十分不方便，RT-Thread提供的[RTTHREAD_SEGGER_TOOL软件包](https://github.com/supperthomas/RTTHREAD_SEGGER_TOOL)可以将J-Link作为RT-Thread的console口来使用，用户在`RT-Thread Settings->硬件->板载设备驱动`下使能SEGGER-RTT即可,如下
+
+![jlink-rtt](docs/picture/jlink-rtt.png)
+
+选中之后就能使用J-Link作为RT-Thread的console来使用了！
+
 
 ## FAQ
 
diff --git a/bsp/renesas/ra6m4-cpk/board/Kconfig b/bsp/renesas/ra6m4-cpk/board/Kconfig
index 20a3099e06..63b29b3b1d 100644
--- a/bsp/renesas/ra6m4-cpk/board/Kconfig
+++ b/bsp/renesas/ra6m4-cpk/board/Kconfig
@@ -9,7 +9,7 @@ menu "Hardware Drivers Config"
 
     menu "Onboard Peripheral Drivers"
 	config BSP_USING_SEGGER_RTT_CONSOLE
-            bool "Enable SEGGER_RTT to console"
+            bool "Enable SEGGER-RTT for console"
             select PKG_USING_SEGGER_RTT
             default n
 
diff --git a/bsp/renesas/ra6m4-cpk/docs/picture/jlink-rtt.png b/bsp/renesas/ra6m4-cpk/docs/picture/jlink-rtt.png
new file mode 100644
index 0000000000..9ecd5aff5a
--- /dev/null
+++ b/bsp/renesas/ra6m4-cpk/docs/picture/jlink-rtt.png