按键控制数码管显示的程序。包括proteus仿真电路图。功能是通过按键的次数实现不同的灯的控制，虽然功能简单，但是使用了片选、锁存，可以作为单片机I/O通过片选扩展端口的很好的例子。自己正在学习编程，希望对大家有所帮助。-Buttons control the digital tube display program. Including proteus simulation circuit. Function is achieved by the number of buttons to control different light, although the feature is simple, but using a chip select, latch, can be used as single-chip I/O expansion port through the chip select good example. Themselves are learning programming, we want to help.