5 匯編源程序

ORG 00H

START: NOP

MOV R3,#3

LOP2: MOV R4,#8

MOV R2,#0

LOP1: MOV P1,#0FFH

MOV DPTR,#TABA

MOV A,R2

MOVC A,@A+DPTR

MOV P3,A

INC R2

LCALL DELAY

DJNZ R4,LOP1

DJNZ R3,LOP2

MOV R3,#3

LOP4: MOV R4,#8

MOV R2,#7

LOP3: MOV P1,#0FFH

MOV DPTR,#TABA

MOV A,R2

MOVC A,@A+DPTR

MOV P3,A

DEC R2

LCALL DELAY

DJNZ R4,LOP3

DJNZ R3,LOP4

MOV R3,#3

LOP6: MOV R4,#8

MOV R2,#0

LOP5: MOV P3,#00H

MOV DPTR,#TABB

MOV A,R2

MOVC A,@A+DPTR

MOV P1,A

INC R2

LCALL DELAY

DJNZ R4,LOP5

DJNZ R3,LOP6

MOV R3,#3

LOP8: MOV R4,#8

MOV R2,#7

LOP7: MOV P3,#00H

MOV DPTR,#TABB

MOV A,R2

MOVC A,@A+DPTR

MOV P1,A

DEC R2

LCALL DELAY

DJNZ R4,LOP7

DJNZ R3,LOP8

LJMP START

DELAY: MOV R5,#10

D2: MOV R6,#20

D1: MOV R7,#248

DJNZ R7,$

DJNZ R6,D1

DJNZ R5,D2

RET

TABA: DB 0FEH,0FDH,0FBH,0F7H,0EFH,0DFH,0BFH,07FH

TABB: DB 01H,02H,04H,08H,10H,20H,40H,80H

END