一个基于s3c2440-linux2.6按键驱动程序的tasklet的典型运用并附带软中断定时器timerlist的用法。标准的中断上半部，下半部写法。在utu2440的arm9开发板中测试成功。,This is a program about a classic top half and bottom half usage with tasklet and timerlist. It s a button driver based linux2.6 for arm9 with s3c2440.