实用的键盘及按键显示加密码校验程序，适用于单片机，ARM等支持C语言的控制器，有较好得可移植性，也是一个实际应用中广告宣传灯箱控制源码-Practical keyboard and buttons display additional password checking procedures, applicable to single-chip, ARM to support the C language, such as controllers, there is a better porta