📄 倚天版999999计数器的另一种形式。.htm
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align=left>;倚天版999999计数器的另一种形式。<BR>;***************************************************************************<BR>;*
(程序转载请著明出处 ，未声明可适应本站腾龙/isp开发套件/倚天版开发套件
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*<BR>;***************************************************************************<BR>org
00h<BR>ORG 0000H<BR>AJMP MAIN<BR>ORG 0030H<BR>MAIN:<BR>MOV 30H,#00H
;30h--33h is a buffer for four 7-segment led display.<BR>MOV 31H,#00H ;at
the beginning,the four 7-seg led all diaplay zero.<BR>MOV 32H,#00H<BR>MOV
33H,#00H<BR>MOV DPTR,#TAB<BR>MAIN1:<BR>mov 35h,#10<BR>lop1:<BR>MOV 34H,#00
;34h and 35h is a counter for control the counter time.the 00h equal
256.<BR>LOOP:<BR>MOV A,30H<BR>MOVC A,@A+DPTR<BR>SETB P2.1<BR>CLR
P2.6<BR>MOV P0,A<BR>LCALL DELAY <BR>MOV P0,#0FFH ;display the lowest
7-seg led.<BR><BR>MOV A,31H<BR>MOVC A,@A+DPTR<BR>SETB P2.6<BR>CLR
P2.5<BR>MOV P0,A <BR>LCALL DELAY<BR>MOV P0,#0FFH<BR><BR>MOV
A,32H<BR>MOVC A,@A+DPTR<BR>SETB P2.5<BR>CLR P2.4<BR>MOV
P0,A <BR>LCALL DELAY<BR>MOV P0,#0FFH<BR><BR>MOV A,33H<BR>MOVC
A,@A+DPTR<BR>SETB P2.4<BR>CLR P2.3<BR>MOV P0,A <BR>LCALL DELAY<BR>MOV
P0,#0FFH ;display the highest 7-seg led.<BR><BR>SETB P2.3<BR>CLR
P2.2<BR>MOV P0,#28h<BR>LCALL DELAY<BR>MOV P0,#0FFH ;display the highest
7-seg led.<BR><BR>SETB P2.2<BR>CLR P2.1<BR>MOV P0,#28h<BR>LCALL
DELAY<BR>MOV P0,#0FFH ;display the highest 7-seg led.<BR><BR><BR>DJNZ
34H,LOOP ;scan one time,34h decrease one,if 34h decrease to zero,the
buffer content will change.<BR><BR>djnz 35h,lop1<BR><BR>INC 30H<BR>MOV
A,30H<BR>CJNE A,#10,MAIN1<BR>MOV 30H,#00H ;if 30h increase to 10,then
clear 30h and increase 31h.<BR><BR>INC 31H<BR>MOV A,31H<BR>CJNE
A,#10,MAIN1<BR>MOV 31H,#00H ;if 31h increase to 10,then clear 31h and
increase 32h.<BR><BR>INC 32H<BR>MOV A,32H<BR>CJNE A,#10,MAIN1<BR>MOV
32H,#00H ;if 32h increase to 10,then clear 32h and increase
33h.<BR><BR>INC 33H<BR>MOV A,33H<BR>CJNE A,#10,MAIN2<BR>MOV 33H,#00H ;if
33h increase to 10,then clear 33h and jump to main.<BR>AJMP
MAIN<BR><BR>main2: ajmp main1<BR>DELAY:<BR>CLR P3.3<BR>MOV
R7,#2<BR>NOP<BR>NOP<BR>D1: MOV R6,#2<BR>SETB P3.3<BR>D2: DJNZ R6,D2<BR>CLR
P3.3<BR>DJNZ R7,D1<BR>SETB P3.3<BR>RET<BR>TAB:<BR>DB
28H,7EH,0A2H,62H,74H,61H,21H,7AH,20H,60H <BR><BR>END<BR></P></TD></TR></TBODY></TABLE></DIV></CENTER></BODY></HTML>
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