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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LED的控制数码管显示的功能，样例中同时控制4个数码管，4个数码管逐步显
示“8888”。

Function descriptions:
This sample demonstrates the LED control digital tube display function, sample
at the same time control 4 digital tubes, 4 digital tubes gradually displayed
"8888".
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测试环境：
测试用板：PY32F030_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: PY32F030_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. 可观察到数码管逐步显示：8888。

Example execution steps:
1.Compile and download the program to the MCU and run it.
2.It can be observed that the digital tube gradually displays: 8888.
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注意事项：
如果需要使用按键:
StartKit版本为V2.0以下,需将StartKit.h中的StartKitVersion 2 注释掉，并打开
StartKitVersion 1
StartKit版本为V2.0及以上版本,则无需操作
1. 此样例需要stk板外接数码管
2. 数码管的COM0/COM1/COM2/COM3分别接stk板的PA15/PB3/PB4/PB5
3. 数码管的SEG A B C D E F G DP 分别接stk板的PB8/PA00/PA01/PA02/PA03/PA04/PA05/PA06
4. 使用中请确认所选的芯片型号，上述IO口是否都有引出

Notes:
If you need to use buttons:
StartKit version is below V2.0, you need to comment StartKitVersion 2 in
StartKit.h, and open StartKitVersion 1 
StartKit version is V2.0 and above, no operation is required
1.This example requires an external 4-digit display connected to the stk board.
2.The COM0/COM1/COM2/COM3 pins of the 4-digit display are respectively connected 
to PA15/PB3/PB4/PB5 of the stk board.
3.The SEG A B C D E F G DP pins of the 4-digit display are respectively connected 
to PB8/PA00/PA01/PA02/PA03/PA04/PA05/PA06 of the stk board.
4.Please confirm the selected chip model and whether the above IO ports are all 
available for use.
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