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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的独立模式功能,OPA的负端和输出端短接，输出端会输出和正端一样的电
压值。

Function descriptions:
This example demonstrates the independent mode function of OPA, where the
negative and output terminals of OPA are short circuited, and the output 
terminal outputs the same electrical output as the positive terminal value.
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测试环境：
测试用板：PY32F005_STK
MDK版本： 5.41
IAR版本： 9.20
GCC 版本：GNU Arm Embedded Toolchain 10.3-2021.10

Test environment:
Test board: PY32F005_STK
MDK Version: 5.41
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. PA1和PA0短接。
3. PA2输入电压1V/2V/3V,PA0上检测到1V/2V/3V

Example execution steps:
1.Compile and download the program.
2. PA1 and PA0 are short-circuited.
3. PA2 input voltage 1V/2V/3V, PA0 detects 1V/2V/3V
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注意事项：
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
PB4(TX)   -->  RX
GND       -->  GND
UART配置为波特率9600

Notes:
Connect the PC to the STK board through the USB to TTL module, and the connection
method between the STK board and the USB to TTL module is as follows:
STK board     USB to TTL module
PB4(TX)  -->  RX
GND      -->  GND
UART is configured as BaudRate 9600
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