基于51单片机平台，通过按键，把键值对应的二进制数显示在流水灯上和串口调试窗口上。 主要包括按键去抖、矩阵按键编程和UART通讯。-Based on 51 single-chip platform, through the key, the key corresponding to the binary number displayed in the water lights on and serial debug window.