feat: update activation instructions and usage guide in README files

Author: dongly

README.md

@@ -86,7 +86,7 @@ After installation, you need to activate the environment variables.
 Run the following command each time you start a new PowerShell session:
 
 ```powershell
-~/.rt-env/env.ps1
+. ~/.rt-env/env.ps1
 ```
 
 **Option B: Auto Activation on Startup (Recommended)**
@@ -98,7 +98,7 @@ Create or edit a PowerShell configuration file to automatically activate the env
 notepad $PROFILE
 
 # Add the following line to the file:
-~/.rt-env/env.ps1
+. ~/.rt-env/env.ps1
 ```
 
 **Configuration File Paths:**
@@ -233,7 +233,58 @@ The following are the parameter descriptions common to all installation scripts:
 
 ## Env Usage Guide
 
-For detailed usage instructions, please refer to:
+After installation completes, follow these steps to start using RT-Thread ENV:
+
+### 1. Activate Environment
+
+**Windows (PowerShell):**
+```powershell
+# Manual activation each time
+. ~/.rt-env/env.ps1
+
+# Or auto-activate on startup (recommended)
+# Add to PowerShell profile: ~/.rt-env/env.ps1
+```
+
+**Linux/macOS (bash/zsh):**
+```bash
+# Manual activation each time
+source ~/.rt-env/env.sh
+
+# Or auto-activate on login (recommended)
+# Add to ~/.bashrc or ~/.zshrc: source ~/.rt-env/env.sh
+```
+
+### 2. Install Toolchains
+
+Use the `sdk` command to install required toolchains for your development board:
+
+```bash
+# Run sdk command to install toolchains
+sdk
+```
+
+### 3. Available Commands
+
+After activation, you can use the following commands:
+
+| Command | Description |
+|---------|-------------|
+| `menuconfig` | Configure project (RT-Thread kernel, BSP) |
+| `menuconfig -s` | Configure RT-Thread ENV (packages, tools) |
+| `pkgs` | Package manager (update, upgrade packages) |
+| `sdk` | Toolchain manager (install toolchains) |
+| `scons` | Build project |
+
+### 4. Additional Tools
+
+**pyocd Installation** (optional, for debugging Cortex-M devices):
+```bash
+# After activation
+pip install pyocd
+```
+
+### 5. For Detailed Usage Instructions, Please Refer to:
 
 - [Env Tool Usage Guide](https://github.com/RT-Thread/rt-thread/blob/master/documentation/env/env.md)
 - [Env Official User Manual](https://www.rt-thread.org/document/site/#/development-tools/env/env)

README_ZH.md

@@ -87,7 +87,7 @@ Set-ExecutionPolicy -ExecutionPolicy Bypass Process; irm https://gitee.com/RT-Th
 每次启动新的 PowerShell 会话时运行以下命令：
 
 ```powershell
-~/.rt-env/env.ps1
+. ~/.rt-env/env.ps1
 ```
 
 **方案 B：启动时自动激活（推荐）**
@@ -99,7 +99,7 @@ Set-ExecutionPolicy -ExecutionPolicy Bypass Process; irm https://gitee.com/RT-Th
 notepad $PROFILE
 
 # 在文件中添加以下行：
-~/.rt-env/env.ps1
+. ~/.rt-env/env.ps1
 ```
 
 **配置文件路径说明：**
@@ -232,9 +232,60 @@ echo 'source ~/.rt-env/env.sh' >> ~/.zshrc
 ./install.sh -S "https://github.com/RT-Thread/sdk.git#master"
 ```
 
-## 使用 Env 指南
+## Env 使用指南
 
-详细使用说明请参考：
+安装完成后，按照以下步骤开始使用 RT-Thread ENV：
+
+### 1. 激活环境
+
+**Windows (PowerShell):**
+```powershell
+# 每次手动激活
+. ~/.rt-env/env.ps1
+
+# 或启动时自动激活（推荐）
+# 添加到 PowerShell 配置文件中: ~/.rt-env/env.ps1
+```
+
+**Linux/macOS (bash/zsh):**
+```bash
+# 每次手动激活
+source ~/.rt-env/env.sh
+
+# 或登录时自动激活（推荐）
+# 添加到 ~/.bashrc 或 ~/.zshrc: source ~/.rt-env/env.sh
+```
+
+### 2. 安装工具链
+
+使用 `sdk` 命令安装开发板所需的工具链：
+
+```bash
+# 运行 sdk 命令安装工具链
+sdk
+```
+
+### 3. 可用命令
+
+激活后，可以使用以下命令：
+
+| 命令 | 说明 |
+|------|------|
+| `menuconfig` | 配置项目（RT-Thread 内核、BSP） |
+| `menuconfig -s` | 配置 RT-Thread ENV（软件包、工具） |
+| `pkgs` | 包管理器（更新、升级软件包） |
+| `sdk` | 工具链管理器（安装工具链） |
+| `scons` | 编译项目 |
+
+### 4. 额外工具
+
+**pyocd 安装**（可选，用于调试 Cortex-M 设备）：
+```bash
+# 激活后安装
+pip install pyocd
+```
+
+### 5. 详细使用说明请参考：
 
 - [Env 工具使用指南](https://github.com/RT-Thread/rt-thread/blob/master/documentation/env/env.md)
 - [Env 官方用户手册](https://www.rt-thread.org/document/site/#/development-tools/env/env)