本帖最后由 mjg89 于 2009-12-13 18:05 编辑
LED定位显示正常，但数码管就是现实不出来。
小弟初学单片机，愿给为仁者给予帮助，指出一下程序的错误。
．
“单片机系统“区域中的P1.0－P1.7端口用8芯排线连接到“4X4行列式键盘”区域中的C1－C4 R1－R4端口上。
八个LED分别也连接着P1的八个端口。
四位数码管的公共端是连接P0的，位选是连接P2_4-P2_7的。
KEYBUF EQU 30H
ORG 00H
START: MOV KEYBUF,#2
WAIT:
MOV P1,#0FFH
CLR P1.4
mov P2,#0EFH
MOV A,P1
ANL A,#0FH
XRL A,#0FH
JZ NOKEY1
LCALL DELY10MS
MOV A,P1
ANL A,#0FH
XRL A,#0FH
JZ NOKEY1
MOV A,P1
ANL A,#0FH
CJNE A,#0EH, NK1
MOV KEYBUF,#0
LJMP DK1
NK1: CJNE A,#0DH, NK2
MOV KEYBUF,#1
LJMP DK1
NK2: CJNE A,#0BH,NK3
MOV KEYBUF,#2
LJMP DK1
NK3: CJNE A,#07H,NK4
MOV KEYBUF,#3
LJMP DK1
NK4: NOP
DK1:
MOV A,KEYBUF
MOV DPTR,#TABLE
MOVC A,@A+DPTR
MOV P0,A
DK1A: MOV A,P1
ANL A,#0FH
XRL A,#0FH
JNZ DK1A
NOKEY1:
MOV P1,#0FFH
CLR P1.5
MOV A,P1
ANL A,#0FH
XRL A,#0FH
JZ NOKEY2
LCALL DELY10MS
MOV A,P3
ANL A,#0FH
XRL A,#0FH
JZ NOKEY2
MOV A,P1
ANL A,#0FH
CJNE A,#0EH,NK5
MOV KEYBUF,#4
LJMP DK2
NK5: CJNE A,#0DH,NK6
MOV KEYBUF,#5
LJMP DK2
NK6: CJNE A,#0BH,NK7
MOV KEYBUF,#6
LJMP DK2
NK7: CJNE A,#07H,NK8
MOV KEYBUF,#7
LJMP DK2
NK8: NOP
DK2:
MOV A,KEYBUF
MOV DPTR,#TABLE
MOVC A,@A+DPTR
MOV P0,A
DK2A: MOV A,P1
ANL A,#0FH
XRL A,#0FH
JNZ DK2A
NOKEY2:
MOV P1,#0FFH
CLR P1.6
MOV A,P1
ANL A,#0FH
XRL A,#0FH
JZ NOKEY3
LCALL DELY10MS
MOV A,P1
ANL A,#0FH
XRL A,#0FH
JZ NOKEY3
MOV A,P1
ANL A,#0FH
CJNE A,#0EH,NK9
MOV KEYBUF,#8
LJMP DK3
NK9: CJNE A,#0DH,NK10
MOV KEYBUF,#9
LJMP DK3
NK10: CJNE A,#0BH,NK11
MOV KEYBUF,#10
LJMP DK3
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,P1
ANL A,#0FH
XRL A,#0FH
JNZ DK3A
NOKEY3:
MOV P1,#0FFH
CLR P1.7
MOV A,P1
ANL A,#0FH
XRL A,#0FH
JZ NOKEY4
LCALL DELY10MS
MOV A,P1
ANL A,#0FH
XRL A,#0FH
JZ NOKEY4
MOV A,P1
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
MOVC A,@A+DPTR
MOV P0,A
DK4A: MOV A,P1
ANL A,#0FH
XRL A,#0FH
JNZ DK4A
NOKEY4:
LJMP WAIT
DELY10MS:
MOV R6,#10
D1: MOV R7,#248
DJNZ R7,$
DJNZ R6,D1
RET
TABLE: DB 3FH,06H,5BH,4FH,66H,6DH,7DH,07H
DB 7FH,6FH,77H,7CH,39H,5EH,79H,71H
END |
楼主
标题置顶
标题高亮
