键盘显示程序.rar键盘是由若干个技键组成的开关矩阵，是最简单的单片机输入设备。通过键盘可输人 数据和命令，实现简单的人机对话。 -keyboard and display procedures. Rar keyboard is made up of a number of key technological switch matrix, is the simplest and most of SCM imported equipment. Through the keyboard in