基于嵌入式linux下的button按键驱动实现代码。利用状态机实现去抖动、短按及长按键等功能。具有参考价值。,Under the button based on embedded linux key driver to achieve the code. Using the state machine to achieve to jitter, short and long key press functions. With a reference value.

S3C2440 键盘驱动，八个按键，中断处理分上下部分，带定时器延时去抖动功能-S3C2440 keyboard-driven, eight buttons, upper and lower part of the interrupt handler with the timer delay to the jitter