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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OPA的电压跟随功能，PA1为正端输入，PA3为负端输入，PA2为输出，PA2会输出
和PA1相同的电压值。

Function descriptions:
This sample demonstrates the voltage follower functionality of the OPA. PA1 
is the positive input, PA3 is the negative input, and PA2 is the output. PA2 
will output the same voltage as PA1.
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测试环境：
测试用板：PY32F410_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: PY32F410_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. 编译并下载程序。
2. 将PA2和PA3短接。
3. 在PA1端输入1V、2V、3V，观察PA2端检测到的电压值，应与PA1端输入的电压值相同。

Example execution steps:
1. Compile and download the program.
2. Short PA2 and PA3 together.
3. Input 1V, 2V, and 3V at the PA1 pin. Observe the voltage detected at the 
PA2 pin, which should be the same as the input voltage at PA1.
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注意事项：

Notes:

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