状态机矩阵键盘程序\key.c ..................\key.IAB ..................\key.IAD ..................\key.IMB ..................\key.IMD ..................\key.PFI ..................\key.PO ..................\key.PR ..................\key.PRI ..................\key.PS ..................\key.WK3 状态机矩阵键盘程序