适合初学者学习51单片机时参考的代码，一共有7份代码。

1.最简单的点亮LED灯到实现流水灯效果

2-7.点亮数码管-数码管模拟显示时间-轮询机制实现按键调节时间-使用中断控制时间

代码有我练习时从简单到一步步增加功能的过程，希望能帮到初学者



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Suitable for beginners to learn 51 SCM reference code, a total of 7 code.

1. The most simple light LED lights to achieve the effect of water lights

2-7. Turn on LED- LED display time- Polling mechanism to realize key adjustment time- Use interrupt control time

Code I practice　simple to step by step increase the function of the process, hoping to help beginners