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                                样例使用说明
                             Sample Description
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功能描述：
此样例演示了比较器中断功能，PA01作为比较器正端输入，VREFINT作为比较器负端输入，
PA06作为比较器的输出端口，通过调整PA01上的输入电压，观测PA06引脚上的电平变化
和LED引脚上的电压翻转。

Function descriptions:
This sample demonstrates the interrupt function of the comparator. PA01 serves 
as the positive input of the comparator, VREFINT serves as the negative input, 
and PA06 is the output port of the comparator. By adjusting the input voltage 
on PA01, the level change on pin PA06 and the voltage toggle on LED pin can be 
observed.
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测试环境：
测试用板：PY32F030_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: PY32F030_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. 配置PA01输入1.1V电压，检测PA06应该输出低电平；
3. 配置PA01输入1.3V电压，检测PA06应该输出高电平；
4. 每进一次比较器中断，翻转一次LED。

Example execution steps:
1.Compile and download the program to the MCU and run it.
2.Configure PA01 to input a voltage of 1.1V and check that PA06 should output 
a low level.
3.Configure PA01 to input a voltage of 1.3V and check that PA06 should output 
a high level.
4.On each comparator interrupt, toggle the voltage on LED pin.
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注意事项：
如果需要使用按键:
StartKit版本为V2.0以下,需将StartKit.h中的StartKitVersion 2 注释掉，并打开
StartKitVersion 1
StartKit版本为V2.0及以上版本,则无需操作

Notes:
If you need to use buttons:
StartKit version is below V2.0, you need to comment StartKitVersion 2 in
StartKit.h, and open StartKitVersion 1 
StartKit version is V2.0 and above, no operation is required

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