Introduction - If you have any usage issues, please Google them yourself
/*************************************************************************************************** The 4 × 4-keyboard drivers* COMPANY NAME: WUYI UNIVERSITY* MODULE NAME: Keyboard drivers* WRITTEN BY: Pang Weicong* FUNCTION DESCRIPTION: Keyboard input processing* EDITION: The first edition V1.0* DATE: 2007-04-16* Copyright: (c) 2007 Pang Weicong**************************************************************************************************/