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                                样例使用说明
                             Sample Description
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功能描述：
本例程输出1路PWM，通道1的占空比为20%，本例程周期为8000000/50/200=800Hz

Function descriptions:
This sample outputs 1 channel PWM, the duty cycle of channel 1 is 20%.The 
period is 8000000/50/200=800Hz
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测试环境：
测试用板：PY32F005_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: PY32F005_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. 编译并下载程序；
2. 用逻分或者示波器连接通道PA5(PWM1_CH1)
3. 查看发现周期为800Hz，占空比为20%

Example execution steps:
1. compile and download the program to MCU and run it;
2. Observe one channel PA5(PWM1_CH1) with logic analyzer or oscilloscope
3. Check that the discovery period is 800Hz
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注意事项：

Notes:

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