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本帖最后由 lianlian 于 2015-7-10 02:23 編輯
八個(gè)數(shù)碼管能顯示：小時(shí)十位小時(shí)個(gè)位—分十位分個(gè)位—秒十位秒個(gè)位，其中獨(dú)立按鍵P3.2可以調(diào)節(jié)小時(shí)，每按一次加一，P3.3調(diào)節(jié)分，每按一次加一，P3.4調(diào)節(jié)分，每按一次減一。
最佳答案
這個(gè)電子鐘程序已經(jīng)基本符合你的要求。希望能對(duì)你有用。程序說(shuō)明：顯示的時(shí)間格式為：12-00-00，既，時(shí)-分-秒按鍵說(shuō)明：P3.2為時(shí)調(diào)節(jié)。P3.3為分調(diào)節(jié)。P3.4為秒調(diào)節(jié)。這三個(gè)按鍵均是每按一次加一。晶振說(shuō)明：12MHZ數(shù)碼管說(shuō)明：共陽(yáng)數(shù)碼管。共8個(gè)數(shù)碼管。共用了兩個(gè)4連共陽(yáng)數(shù)碼管。其中，P0口為數(shù)碼管的段選，P2口為數(shù)碼管的位選。本程序已通過(guò)實(shí)踐驗(yàn)證�。�！
匯編源程序如下：
SECOND EQU 30H
MINITE EQU 31H
HOUR EQU 32H
HOURK bit P3.2
MINITEK bit P3.3
SECONDK bit P3.4
dispBUF EQU 40H
dispbit EQU 48H
T2SCNTA EQU 49H
T2SCNTB EQU 4AH
TEMP EQU 4BH
ORG 00H
LJMP START
ORG 0BH
LJMP INT_T0
START:MOV SECOND,#00H
MOV MINITE,#00H
MOV HOUR,#12
MOV dispbit,#00H
MOV T2SCNTA,#00H
MOV T2SCNTB,#00H
MOV TEMP,#0FEH
LCALL disp
MOV TMOD,#01H
MOV TH0,#(65536-2000) / 256
MOV TL0,#(65536-2000) MOD 256
SETB TR0
SETB ET0
SETB EA
WT:JB SECONDK,NK1
LCALL DELY10MS
JB SECONDK,NK1
INC SECOND
MOV A,SECOND
cjne A,#60,NS60
MOV SECOND,#00H
NS60:LCALL disp
JNB SECONDK,$
NK1:JB MINITEK,NK2
LCALL DELY10MS
JB MINITEK,NK2
INC MINITE
MOV A,MINITE
cjne A,#60,NM60
MOV MINITE,#00H
NM60:LCALL disp
JNB MINITEK,$
NK2:JB HOURK,NK3
LCALL DELY10MS
JB HOURK,NK3
INC HOUR
MOV A,HOUR
cjne A,#24,NH24
MOV HOUR,#00H
NH24:LCALL disp
JNB HOURK,$
NK3:LJMP WT
DELY10MS:MOV R6,#10
D1:MOV R7,#248
djnz R7,$
djnz R6,D1
RET
disp:MOV A,#dispBUF
add A,#8
dec A
MOV R1,A
MOV A,HOUR
MOV B,#10
div AB
MOV @R1,A
dec R1
MOV A,B
MOV @R1,A
dec R1
MOV A,#10
MOV @R1,A
dec R1
MOV A,MINITE
MOV B,#10
div AB
MOV @R1,A
dec R1
MOV A,B
MOV @R1,A
dec R1
MOV A,#10
MOV@R1,A
dec R1
MOV A,SECOND
MOV B,#10
div AB
MOV @R1,A
dec R1
MOV A,B
MOV @R1,A
dec R1
RET
INT_T0:MOV TH0,#(65536-2000) / 256
MOV TL0,#(65536-2000) MOD 256
MOV A,#dispBUF
add A,dispbit
MOV R0,A
MOV A,@R0
MOV dptr,#TABLE
MOVC A,@A+dptr
MOV P0,A
MOV A,dispbit
MOV dptr,#TAB
MOVC A,@A+dptr
MOV P2,A
INC dispbit
MOV A,dispbit
cjne A,#08H,KNA
MOV dispbit,#00H
KNA:INC T2SCNTA
MOV A,T2SCNTA
cjne A,#100,done
MOV T2SCNTA,#00H
INC T2SCNTB
MOV A,T2SCNTB
cjne A,#05H,done
MOV T2SCNTB,#00H
INC SECOND
MOV A,SECOND
cjne A,#60,NEXT
MOV SECOND,#00H
INC MINITE
MOV A,MINITE
cjne A,#60,NEXT
MOV MINITE,#00H
INC HOUR
MOV A,HOUR
CJNE A,#24,NEXT
MOV HOUR,#00H
NEXT:LCALL DISP
done:RETI
TABLE:db 0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H,90H,0BFH
TAB:db 0FEH,0FDH,0FBH,0F7H,0EFH,0DFH,0BFH,07FH
END
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