led.lst

数字钟


ASEM-51 V1.2                                         Copyright (c) 1996 by W.W. Heinz                                         PAGE 1





       MCS-51 Family Cross Assembler   A S E M - 5 1   V 1.2
       =====================================================



	Source File:	LED.ASM
	Object File:	LED.HEX
	List File:	LED.LST



 Line  I  Addr  Code            Source

    1:		N      0000			ORG 	00H
    2:
    3:	  0000	90 00 22	START: 		MOV 	DPTR,#TABLE			  	;指针指向表头地址
    4:
    5:	  0003	74 00		S1:		MOV	A,#00H					;设置地址偏移量
    6:	  0005	93				MOVC	A,@A+DPTR			  	;查表取得段码,送A存储
    7:	  0006	B4 01 03			CJNE	A,#01H,S2			  	;判断段码是否为结束符
    8:	  0009	02 00 00			LJMP	START
    9:
   10:	  000C	F5 80		S2:		MOV	P0,A					;段码送LED显示
   11:	  000E	12 00 15			LCALL	DELAY				  	;指针加1
   12:	  0011	A3				INC	DPTR
   13:	  0012	02 00 03			LJMP	S1
   14:
   15:
   16:	  0015	7D 14		DELAY: 		MOV 	R5,#20				  ;延时子程序
   17:	  0017	7E 14		D2: 		MOV 	R6,#20
   18:	  0019	7F F8		D1: 		MOV 	R7,#248
   19:	  001B	DF FE				DJNZ 	R7,$
   20:	  001D	DE FA				DJNZ 	R6,D1
   21:	  001F	DD F6				DJNZ 	R5,D2
   22:	  0021	22				RET
   23:
   24:	  0022	3F 06 5B 4F	TABLE: 	DB 		3FH,06H,5BH,4FH,66H	  	;段码表
	  0026	66
   25:	  0027	6D 7D 07 7F		DB		6DH,7DH,07H,7FH,6FH
	  002B	6F
   26:	  002C	01			DB		01H				;结束符
   27:					END





                     register banks used:  ---

                     no errors




ASEM-51 V1.2                                         Copyright (c) 1996 by W.W. Heinz                                         PAGE 2





	       L I S T   O F   S Y M B O L S
	       =============================


SYMBOL				  TYPE     VALUE	LINE
------------------------------------------------------------
AC				  BIT	      D6
ACC				  DATA	      E0
B				  DATA	      F0
CY				  BIT	      D7
D1				  CODE	    0019	  18
D2				  CODE	    0017	  17
DELAY				  CODE	    0015	  16
DPH				  DATA	      83
DPL				  DATA	      82
EA				  BIT	      AF
ES				  BIT	      AC
ET0				  BIT	      A9
ET1				  BIT	      AB
EX0				  BIT	      A8
EX1				  BIT	      AA
EXTI0				  CODE	    0003
EXTI1				  CODE	    0013
F0				  BIT	      D5
IE				  DATA	      A8
IE0				  BIT	      89
IE1				  BIT	      8B
INT0				  BIT	      B2
INT1				  BIT	      B3
IP				  DATA	      B8
IT0				  BIT	      88
IT1				  BIT	      8A
OV				  BIT	      D2
P				  BIT	      D0
P0				  DATA	      80
P1				  DATA	      90
P2				  DATA	      A0
P3				  DATA	      B0
PCON				  DATA	      87
PS				  BIT	      BC
PSW				  DATA	      D0
PT0				  BIT	      B9
PT1				  BIT	      BB
PX0				  BIT	      B8
PX1				  BIT	      BA
RB8				  BIT	      9A
RD				  BIT	      B7
REN				  BIT	      9C
RESET				  CODE	    0000
RI				  BIT	      98
RS0				  BIT	      D3
RS1				  BIT	      D4
RXD				  BIT	      B0
S1				  CODE	    0003	   5
S2				  CODE	    000C	  10
SBUF				  DATA	      99

ASEM-51 V1.2                                         Copyright (c) 1996 by W.W. Heinz                                         PAGE 3



SYMBOL				  TYPE     VALUE	LINE
------------------------------------------------------------
SCON				  DATA	      98
SINT				  CODE	    0023
SM0				  BIT	      9F
SM1				  BIT	      9E
SM2				  BIT	      9D
SP				  DATA	      81
START				  CODE	    0000	   3
T0				  BIT	      B4
T1				  BIT	      B5
TABLE				  CODE	    0022	  24
TB8				  BIT	      9B
TCON				  DATA	      88
TF0				  BIT	      8D
TF1				  BIT	      8F
TH0				  DATA	      8C
TH1				  DATA	      8D
TI				  BIT	      99
TIMER0				  CODE	    000B
TIMER1				  CODE	    001B
TL0				  DATA	      8A
TL1				  DATA	      8B
TMOD				  DATA	      89
TR0				  BIT	      8C
TR1				  BIT	      8E
TXD				  BIT	      B1
WR				  BIT	      B6