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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PGA的差分输入ADC采样功能，PA0作为PGA正端输入，PA1作为PGA负端输入，PD0输出
放大结果.

Function descriptions:
This sample demonstrates the differential input ADC sampling function of the PGA. 
PA0 serves as the positive terminal input of the PGA, PA1 serves as the negative 
terminal input of the PGA, and PD0 outputs the amplification result.
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测试环境：
测试用板：DPM32M030_REV_A
MDK版本： 5.28

Test environment:
Test board: DPM32M030_REV_A
MDK Version: 5.28
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使用步骤：
1. 编译下载程序到MCU，并运行。
2. PD0可输出PGA的放大结果。

Example execution steps:
1. Compile and download the program to MCU, and run it.
2. PD0 can output the amplification result of PGA.
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注意事项：
PGA引脚如下：
PGA_P    -> PA0
PGA_P    -> PA1
PGA_Out  -> PD0

Notes:
The PGA pins are as follows:
PGA_P    -> PA0
PGA_P    -> PA1
PGA_Out  -> PD0
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