7279 按键显示程序 能够准确显示键盘键入的数值-7279 button to display the program can accurately display the value of the keyboard type

键盘数码管控制显示程序实例， 与单片机连接集成芯片程序说明，帮助芯片作用的理解-The keyboard digital control program instance, the the keyboard digital control display program instance, the keyboard digital control display program instance,