给初学单片机的40个实验-2(6)

NK11: CJNE A,#07H,NK12 MOV KEYBUF,#11 LJMP DK3 NK12: NOP DK3:

MOV A,KEYBUF MOV DPTR,#TABLE MOVC A,@A+DPTR MOV P0,A

DK3A: MOV A,P3 ANL A,#0FH XRL A,#0FH JNZ DK3A NOKEY3:

MOV P3,#0FFH CLR P3.7 MOV A,P3 ANL A,#0FH XRL A,#0FH JZ NOKEY4

LCALL DELY10MS MOV A,P3 ANL A,#0FH XRL A,#0FH JZ NOKEY4 MOV A,P3 ANL A,#0FH

CJNE A,#0EH,NK13 MOV KEYBUF,#12 LJMP DK4

NK13: CJNE A,#0DH,NK14 MOV KEYBUF,#13 LJMP DK4

NK14: CJNE A,#0BH,NK15 MOV KEYBUF,#14 LJMP DK4

NK15: CJNE A,#07H,NK16 MOV KEYBUF,#15 LJMP DK4 NK16: NOP DK4:

MOV A,KEYBUF MOV DPTR,#TABLE

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