CLR TR0 ; 关闭定时器T0

NOKEY2: MOV P3,#0FFH ;设置P3口为输入模式 CLR P3.6 ; 清0 P3.6，按键的第三行扫描 MOV A,P3 ANL A,#0FH XRL A,#0FH JZ NOKEY3

LCALL DELY10MS ; 延时10ms MOV A,P3 ANL A,#0FH XRL A,#0FH JZ NOKEY3 MOV A,P3 ANL A,#0FH CJNE A,#0EH,NK9 MOV KEYBUF,#8 LJMP DK3

NK9: CJNE A,#0DH,NK10 ;K9键按下 MOV KEYBUF,#9 LJMP DK3

NK10: CJNE A,#0BH,NK11 ;K10键按下 MOV KEYBUF,#10 LJMP DK3

NK11: CJNE A,#07H,NK12 ;K11键按下 MOV KEYBUF,#11 LJMP DK3

NK12: NOP ; K12键按下 DK3: MOV A,KEYBUF MOV B,#2

MUL AB ;因为查表里都是字，所以乘2的查表数据

MOV TEMP,A

MOV DPTR,#TABLE ;指向表头 MOVC A,@A+DPTR ;查表 MOV STH0,A