自行开发的uclinux系统4x4键盘的底层驱动，包括中断请求以及回调例程，扫描健值判断等，现已经用于某卫星接收中端设备中-Self-developed system of uClinux 4x4 drive the bottom of the keyboard, including the interrupt request and the callback routine, scanning Kin value judgments and so on, are already used fo