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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：PY32C642_STK
MDK版本： 5.28

Test environment:
Test board: PY32C642_STK
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. 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"OB_GPIO_PIN_MODE OB_SWD_PB6_GPIO_PC0",打开"OB_GPIO_PIN_MODE 
OB_SWD_PB6_NRST_PC0",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, LED lights up;
4. Annotate "OB_GPIO_PIN_MODE OB_SWD-PB6_GPIO-PC0" and open "OB_GPIO_PIN_MODE
OB_SWD_PB6NRST_PC0",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,the LED lights up;
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注意事项：

Notes:
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