1設(shè)計(jì)任務(wù)

（ 按下時(shí)依次紅燈全亮，同時(shí)數(shù)碼管顯示15S的到計(jì)時(shí)；東西綠燈亮，南北紅燈亮，同時(shí)數(shù)碼管顯示30S的到計(jì)時(shí)；計(jì)閃次數(shù)8次。。。。。。。。。。。。）

2匯編程序

MIAOEQU 30H

ORG 0000H

LJMP START

ORG 000BH

LJMP INTET0

START: LACALL JS1

MOV P1,#0F6H；點(diǎn)亮四個(gè)紅燈

MOV P3,#0DEH

LCALLDE15S ；延時(shí)15S

LLL: MOV P1,#0DBH ；東西綠燈亮，南北紅燈亮

MOV P3,#0DEH

LCALLDE30S ；延時(shí)30S

MOV P1,#0FFH ；東西綠燈滅，南北紅燈亮

MOV P3,#0DEH

MOV R1,#08H; 計(jì)閃次數(shù)8次

DDD: MOV P1,#0EDH ; 東西黃燈亮，南北紅燈亮

MOV P3,#0DEH

ACALL DE02S

MOV P1,#0FFH ; 東西黃燈滅，南北紅燈亮

DE6S: MOV R5,#60 ;延時(shí)6S

SJMP DE1

DE02S: MOV R5,#02H ; 延時(shí)0.2S

DE1: MOV R6,#200

DE2: MOV R7,#126

DE3: DJNZ R7,DE3

DJNZ R6,DE2

DJNZ R5,DE1

RET

JS1: MOV TMOD,#01H ; 50MS定時(shí)常數(shù)

MOV TH0,#3CH

MOV TL0,#0B0H

MOV R0,#20 ; 1S定時(shí)常數(shù)

SETB EA

SETB ET0

RET

DE30S: MOV MIAO,#00H

NEXT: MOV A,MIAO

MOV B,#10

DIV AB

MOV DPTR,#TABLE

MOVC A,@A+DPTR

MOV P0,A

MOV A,B

MOVC A,@A+DPTR

MOV P2，A

LCALL DELY1S

INC MIAO

MOV A,MIAO

DEC MIAO

MOVA，MIAO

CJNE A,#30,NEXT

LJMP DE30S

DE15S: MOV MIAO,#00H

NEXT: MOV A,MIAO

MOV B,#10

DIV AB

MOV DPTR,#TABLE

MOVC A,@A+DPTR

MOV P0,A

MOV A,B

MOVC A,@A+DPTR

MOV P2,A

LCALL DELY1S

INC MIAO

MOV A,MIAO

DEC MIAO

MOVA，MIAO

CJNE A,#15,NEXT

LJMP DE15S

DELY1S: MOV R5,#100

D2: MOV R6,#20

D1: MOV R7,#248

DJNZ R7,$

DJNZ R6,D1

DJNZ R5,D2

RET

TABLE: DB 3FH,06H,5BH,4FH,66H,6DH,7DH,07H,7FH,6FH

END