按键驱动程序。主要功能：如果按下查询键值，消抖，发送标志位置位 如果同一个键一直处于按下状态，只发送一次；如果是两个特殊键，则一直发送。-Key drivers. Main functions: if the key press inquiries, elimination Buffeting, send mark the location of places, if the same key has been pressed, and sent only once if there are