一个通用嵌入式产品按键处理程序，包含去抖，快进键，长按键，可方便的做成各种组合键。-A generic product keys embedded processing, including debounced, fast-forward button, long keys can be convenient to make various combinations of keys.

89c51平台实现4*4小键盘的扫描，需要的时候可以用#include包含进去就可以用了-89C51 platform 4* 4 small keyboard scan, when necessary, can be# Include to include can be used

在QT4.5编程环境下写的一个数字软键盘程序。类似计算器上的数字键盘。具体开发过程中，在没有软键盘的开发板程序开发中，可以直接拿过来使用。-QT4.5 programming environment in a number of written procedures for the soft keyboard. Similar figures on the calculator keyboard. Specific developmen