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                                样例使用说明
                             Sample Description
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功能描述：
本样例主要展示GPIO的FAST IO输出功能，FAST IO速度可以达到单周期翻转速度。

Function descriptions:
This sample demonstrates the FAST IO output functionality of GPIO, 
which can achieve a single-cycle toggling speed.
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测试环境：
测试用板：PY32F033_STK
MDK版本： 5.28

Test environment:
Test board: PY32F033_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. GPIO每个时钟周期输出翻转一次，可观测到端口PA11输出波形输出波形频率为4MHz。

Example execution steps:
1.Compile and download the program to the MCU, and run it.
2.The GPIO outputs toggle every clock cycle. You can observe the waveform 
on pin PA11 with an output frequency of 4MHz.
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注意事项：

Notes:

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