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                                样例使用说明
                             Sample Description
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功能描述：
此样例演示了通过软件方式将RESET引脚改为普通GPIO。

Function descriptions:
This example demonstrates changing the RESET pin to regular GPIO through software.
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测试环境：
测试用板：PY32F040EP_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: PY32F040EP_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. 请将MCU断电并重新上电；
3. 按下按键，RST键变为GPIO功能，LED亮；
4. 注释掉"RSTPIN_MODE_GPIO",打开"RSTPIN_MODE_RST",编译重新下载到MCU;
5. 将MCU断电并重新上电；
6. 按下按键，RST键变为RESET功能，LED亮；

Example execution steps:
1. Compile and download the program to MCU and run it;
2. Please turn off the MCU and power it back on;
3. Press the button,RST key changes to GPIO function and LED lights up;
4. Annotate "RSTPIN_MODE_GPIO" and open "RSTPIN_MODE_RST",
Compile and download again to MCU;
5. Turn off the MCU and power it back on;
6. Press the button,The RST key changes to the RESET function, and the LED lights
up;
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注意事项：
如果需要使用按键:
StartKit版本为V1.0,需将StartKit.h中的StartKitVersion 2 注释掉，并打开
StartKitVersion 1
StartKit版本为V1.0以上版本,则无需操作
该样例将RST的按键改成GPIO功能，在使用其他样例前请将RST按键改回RST功能。

Notes:
If you need to use buttons:
StartKit version is V1.0, please comment out StartKitVersion 2 in StartKit.h and 
open StartKitVersion 1
If the StartKit version is above V1.0, no operation is required
This example changes the RST button to GPIO function, please change the RST button
back to RST function before using other examples.
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