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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TIM1的外部时钟模式1功能，配置PA5作为输入捕获引脚，PA5每检测到100个上
升沿触发更新中断，在更新中断回调函数中翻转LED灯。

Function descriptions:
This sample demonstrates the external clock mode 1 function of the TIM1, 
configuring PA5 as the input capture pin, with PA5 detecting every 100 rising
rising edge, PA5 triggers the update interrupt and flips the LED in the update 
interrupt callback function.
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测试环境：
测试用板：MS32C001B_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: MS32C001B_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. 外部输入时钟信号到PA5引脚，外部时钟信号每经过100个上升沿,LED翻转一次。

Example execution steps:
1.Compile and download the program to MCU and run it;
2.Input external clock signal to PA5 pin, every 100 rising edges of the external
clock signal, the LED will flip once.
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注意事项：

Notes:

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