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                                样例使用说明
                             Sample Description
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功能描述：
此样例演示了FreeRTOS列表的相关API函数应用，实现列表项的插入和删除。通过串口log，
观察列表项的插入和删除实现过程。

Function descriptions:
This example demonstrates the application of FreeRTOS list related API functions 
to implement the insertion and deletion of list items. log through the serial 
port to observe the process of inserting and deleting list items.

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测试环境：
测试用板：PY32F403_STK
MDK版本：5.28
IAR版本：9.20
GCC版本：GNU Arm Embedded Toolchain 10.3-2021.10

Test environment:
Test board: PY32F403_STK
MDK Version: 5.28
IAR Version: 9.20
GCC Version: GNU Arm Embedded Toolchain 10.3-2021.10

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使用步骤：
1. 编译下载程序到MCU，并运行；
2. 通过串口调试助手打印的log信息，观察任务执行过程。
   Task1: LED灯闪烁，打印"Task1 is running"信息。
   Task2: 创建列表、列表项，插入、删除，打印列表项地址信息。

Example execution steps:
1. Compile and download the program to the MCU and run it;
2. You can use the log information printed by the serial debugging assistant to 
observe the task execution process.
   Task1: The LED is blinking, and Print the "Task1 is running" message.
   Task2: Create lists, list items, insert, delete, and print list item address 
          information.

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注意事项：
此样例使用到了串口打印功能，相关配置请参考下面的步骤。
1. 编译并下载程序到MCU；
2. 通过USB转TTL模块连接PC与STK板，STK板与USB转TTL模块的连线方式如下：
   STK板        USB转TTL模块
   PA02(TX) --> RX
   PA03(RX) --> TX
   GND      --> GND
3. PC端打开串口调试助手，正确连接上通讯COM口，波特率设置为115200；
4. 按STK板Reset按键，即可打印log数据。

Example execution steps:
This example uses the serial port printing function. For details about the 
configuration, see the following steps.
1. Compile and download the program to the MCU;
2. Connect the PC and STK board with a USB to TTL module. The connection between 
   the STK board and the USB to TTL module is as follows:
   STK board        USB to TTL module
   PA02(TX) --> RX
   PA03(RX) --> TX
   GND      --> GND
3. Open a serial debugging assistant on the PC and connect to the appropriate COM 
   port with the baud rate set to 115200;
4. Press the Reset button on the STK board to print log data.
Notes:

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