stop.lst

多个仿真例子


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:	STOP.ASM
	Object File:	STOP.HEX
	List File:	STOP.LST



 Line  I  Addr  Code            Source

    1:				;这是一个利用串行口扩展并行I/O口的例子
    2:				;系统的晶振频率12MHz，利用CD4014和CD4094扩展出两个8位并行口。
    3:				;编程读入开关状态，存入片内RAM的40H单元，并同时输出到LED上显示出来。
    4:		N      0040	KEY	EQU	40H
    5:		N      0000		ORG	0
    6:	  0000	75 98 00		MOV	SCON,#0H	;串口方式0，允许接收数据
    7:	  0003	C2 90		RX0:	CLR	P1.0		;并行输入开关状态
    8:	  0005	D2 90			SETB	P1.0		;允许串行移位
    9:	  0007	D2 9C			SETB	REN		;允许串行接收数据
   10:	  0009	30 98 FD		JNB	RI,$		;等待一帧数据接收结束
   11:	  000C	C2 9C			CLR	REN		;停止接收
   12:	  000E	C2 98			CLR	RI
   13:	  0010	E5 99			MOV	A,SBUF		;读开关状态
   14:	  0012	F5 40			MOV	KEY,A		;存开关状态
   15:	  0014	12 00 28	TX0:	LCALL	CONVERT		;将开关状态转换为数码管的段码
   16:	  0017	C2 92			clr	p1.2
   17:	  0019	D2 91			setb	P1.1		;关显示
   18:	  001B	F5 99			MOV	SBUF,A		;开关状态送数码管显示
   19:	  001D	30 99 FD		JNB	TI,$		;等待一帧数据发送结束
   20:	  0020	C2 99			CLR	TI
   21:	  0022	C2 91			clr	P1.1		;选通CD4094
   22:	  0024	D2 92			setb	p1.2
   23:	  0026	80 DB			SJMP	RX0
   24:	  0028	20 E0 04	CONVERT:JB	ACC.0,C0	;S0按下了？否，则转
   25:	  002B	74 3F			MOV	A,#3FH		;"0"的显示段码
   26:	  002D	80 33			SJMP	C_END
   27:	  002F	20 E1 04	C0:	JB	ACC.1,C1
   28:	  0032	74 06			MOV	A,#06H		;"1"的显示段码
   29:	  0034	80 2C			SJMP	C_END
   30:	  0036	20 E2 04	C1:	JB	ACC.2,C2
   31:	  0039	74 5B			MOV	A,#5BH		;"2"的显示段码
   32:	  003B	80 25			SJMP	C_END
   33:	  003D	20 E3 04	C2:	JB	ACC.3,C3
   34:	  0040	74 4F			MOV	A,#4FH		;"3"的显示段码
   35:	  0042	80 1E			SJMP	C_END
   36:	  0044	20 E4 04	C3:	JB	ACC.4,C4
   37:	  0047	74 66			MOV	A,#66H		;"4"的显示段码
   38:	  0049	80 17			SJMP	C_END
   39:	  004B	20 E5 04	C4:	JB	ACC.5,C5
   40:	  004E	74 6D			MOV	A,#6DH		;"5"的显示段码
   41:	  0050	80 10			SJMP	C_END
   42:	  0052	20 E6 04	C5:	JB	ACC.6,C6
   43:	  0055	74 7D			MOV	A,#7DH		;"6"的显示段码

ASEM-51 V1.2                                         Copyright (c) 1996 by W.W. Heinz                                         PAGE 2



 Line  I  Addr  Code            Source

   44:	  0057	80 09			SJMP	C_END
   45:	  0059	20 E7 04	C6:	JB	ACC.7,C_7
   46:	  005C	74 27			MOV	A,#27H		;"7"的显示段码
   47:	  005E	80 02			SJMP	C_END
   48:	  0060	74 00		C_7:	MOV	A,#0
   49:	  0062	22		C_END:	RET
   50:					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
------------------------------------------------------------
AC				  BIT	      D6
ACC				  DATA	      E0
B				  DATA	      F0
C0				  CODE	    002F	  27
C1				  CODE	    0036	  30
C2				  CODE	    003D	  33
C3				  CODE	    0044	  36
C4				  CODE	    004B	  39
C5				  CODE	    0052	  42
C6				  CODE	    0059	  45
CONVERT				  CODE	    0028	  24
CY				  BIT	      D7
C_7				  CODE	    0060	  48
C_END				  CODE	    0062	  49
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
KEY				  NUMBER    0040	   4
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

ASEM-51 V1.2                                         Copyright (c) 1996 by W.W. Heinz                                         PAGE 4



SYMBOL				  TYPE     VALUE	LINE
------------------------------------------------------------
RESET				  CODE	    0000
RI				  BIT	      98
RS0				  BIT	      D3
RS1				  BIT	      D4
RX0				  CODE	    0003	   7
RXD				  BIT	      B0
SBUF				  DATA	      99
SCON				  DATA	      98
SINT				  CODE	    0023
SM0				  BIT	      9F
SM1				  BIT	      9E
SM2				  BIT	      9D
SP				  DATA	      81
T0				  BIT	      B4
T1				  BIT	      B5
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
TX0				  CODE	    0014	  15
TXD				  BIT	      B1
WR				  BIT	      B6