ad.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:	AD.ASM
	Object File:	AD.HEX
	List File:	AD.LST



 Line  I  Addr  Code            Source

    1:		N      0030	DBUF0  	EQU		30H
    2:		N      0040	TEMP   	EQU 	40H
    3:		N	 B0	DIN    	BIT 	0B0H
    4:		N	 B1	CLK    	BIT		0B1H
    5:		N      0000			ORG    	0000H
    6:	  0000	78 30		START:	MOV		R0,#DBUF0      	;显示缓冲器存放0AH，0DH，—，0XH，0XH
    7:	  0002	76 0A				MOV 	@R0,#0AH        ;串行静态显示“AD XX”XX表示0--F
    8:	  0004	08				INC 	R0
    9:	  0005	76 0D				MOV		@R0,#0DH
   10:	  0007	08				INC 	R0
   11:	  0008	76 10				MOV 	@R0,#10H
   12:	  000A	08				INC  	R0
   13:	  000B	90 FE F3			MOV 	DPTR,#0FEF3H    ;A/D地址
   14:	  000E	74 00				MOV  	A,#0            ;清零
   15:	  0010	F0				MOVX 	@DPTR,A         ;启动A/D
   16:	  0011	30 B3 FD			JNB 	P3.3,$          ;等待转换结果
   17:	  0014	E0				MOVX 	A,@DPTR         ;读入结果
   18:	  0015	F5 90				MOV 	P1,A			;转换结果送入发光二极管
   19:	  0017	F5 F0				MOV 	B,A				;累加器内容存入B中
   20:	  0019	C4				SWAP 	A				;A的内容高四位与低四位交换
   21:	  001A	54 0F				ANL 	A,#0FH			;A的内容高四位清零
   22:	  001C	D6				XCHD	A,@R0			;A/D转换结果高四位送入DBUF3
   23:	  001D	08				INC 	R0
   24:	  001E	E5 F0				MOV 	A,B				;取出A/D转换后的结果
   25:	  0020	54 0F				ANL 	A,#0FH			;A的内容高四位清零
   26:	  0022	D6				XCHD	A,@R0			;结果低位送入DBF4中
   27:	  0023	11 29		       	ACALL  	DISP1			;串行静态显示“AD XX”
   28:	  0025	11 5F		       	ACALL  	DELAY			;延时
   29:	  0027	01 00		       	AJMP   	START
   30:	  0029	78 30		DISP1:	MOV 	R0,#DBUF0		;静态显示子程序
   31:	  002B	79 44				MOV		R1,#TEMP+4
   32:	  002D	7A 05				MOV		R2,#5
   33:	  002F	90 00 4D	DP10: 	MOV		DPTR,#SEGTAB	;表头地址
   34:	  0032	E6				MOV		A,@R0
   35:	  0033	93				MOVC  	A,@A+DPTR		;取段码
   36:	  0034	F7				MOV		@R1,A			;到TEMP中
   37:	  0035	08				INC 	R0
   38:	  0036	19				DEC		R1
   39:	  0037	DA F6				DJNZ	R2,DP10
   40:	  0039	78 40				MOV		R0,#TEMP		;段码地址指针
   41:	  003B	79 05				MOV		R1,#5			;段码字节数
   42:	  003D	7A 08		DP12:	MOV		R2,#8			;移位次数
   43:	  003F	E6				MOV    	A,@R0			;取段码

ASEM-51 V1.2                                         Copyright (c) 1996 by W.W. Heinz                                         PAGE 2



 Line  I  Addr  Code            Source

   44:	  0040	33		DP13: 	RLC 	A				;断码左移
   45:	  0041	92 B0				MOV 	DIN,C			;输出一位段码
   46:	  0043	C2 B1				CLR 	CLK				;发送一个位移脉冲
   47:	  0045	D2 B1				SETB	CLK
   48:	  0047	DA F7				DJNZ	R2,DP13
   49:	  0049	08				INC		R0
   50:	  004A	D9 F1				DJNZ	R1,DP12
   51:	  004C	22				RET
   52:	  004D	3F 06 5B 4F	SEGTAB:	DB		3FH,6,5BH,4FH,66H,6DH
	  0051	66 6D
   53:	  0053	7D 07 7F 6F	        DB		7DH,7,7FH,6FH,77H,7CH
	  0057	77 7C
   54:	  0059	58 5E 79 71	        DB		58H,5EH,79H,71H,0,40H
	  005D	00 40
   55:	  005F	7C AF		DELAY:	MOV		R4,#0AFH
   56:	  0061	7D FF		AA1:  	MOV		R5,#0FFH
   57:	  0063	00		AA:   	NOP
   58:	  0064	00		        NOP
   59:	  0065	00		        NOP
   60:	  0066	DD FB		        DJNZ	R5,AA
   61:	  0068	DC F7		        DJNZ	R4,AA1
   62:	  006A	22		        RET
   63:				        END





                     register banks used:  ---

                     no errors




ASEM-51 V1.2                                         Copyright (c) 1996 by W.W. Heinz                                         PAGE 3





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


SYMBOL				  TYPE     VALUE	LINE
------------------------------------------------------------
AA				  CODE	    0063	  57
AA1				  CODE	    0061	  56
AC				  BIT	      D6
ACC				  DATA	      E0
B				  DATA	      F0
CLK				  BIT	      B1	   4
CY				  BIT	      D7
DBUF0				  NUMBER    0030	   1
DELAY				  CODE	    005F	  55
DIN				  BIT	      B0	   3
DISP1				  CODE	    0029	  30
DP10				  CODE	    002F	  33
DP12				  CODE	    003D	  42
DP13				  CODE	    0040	  44
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

ASEM-51 V1.2                                         Copyright (c) 1996 by W.W. Heinz                                         PAGE 4



SYMBOL				  TYPE     VALUE	LINE
------------------------------------------------------------
RI				  BIT	      98
RS0				  BIT	      D3
RS1				  BIT	      D4
RXD				  BIT	      B0
SBUF				  DATA	      99
SCON				  DATA	      98
SEGTAB				  CODE	    004D	  52
SINT				  CODE	    0023
SM0				  BIT	      9F
SM1				  BIT	      9E
SM2				  BIT	      9D
SP				  DATA	      81
START				  CODE	    0000	   6
T0				  BIT	      B4
T1				  BIT	      B5
TB8				  BIT	      9B
TCON				  DATA	      88
TEMP				  NUMBER    0040	   2
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