ex5-6.lst

《单片机原理实用教程——基于Proteus虚拟仿真》一书的配套光盘


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:	EX5-6.ASM
	Object File:	EX5-6.HEX
	List File:	EX5-6.LST



 Line  I  Addr  Code            Source

    1:		N      0000		ORG 0000H           ;复位地址
    2:	  0000	02 00 30		LJMP MAIN           ;跳转到主程序
    3:		N      0030		ORG 0030H           ;主程序入口地址
    4:	  0030	75 89 90	MAIN:	MOV  TMOD,#90H      ;T1工作于定时方式1，GATE=1
    5:	  0033	75 8B 00		MOV  TL1, #00H      ;计数初值设为0
    6:	  0036	75 8D 00		MOV  TH1, #00H      ;当fosc为12MHz时最大脉冲宽度为65.536ms
    7:	  0039	20 B3 FD	RL1:  	JB   P3.3, RL1      ;等待P3.3变低
    8:	  003C	D2 8E			SETB TR1            ;启动T1
    9:	  003E	30 B3 FD	RL2: 	JNB  P3.3, RL2      ;等待P3.3变高
   10:	  0041	20 B3 FD	RL3: 	JB   P3.3,RL3      ;等待P3.3再次变低
   11:	  0044	C2 8E		    	CLR  TR1            ;停止T1
   12:	  0046	85 8D 30	    	MOV  30H, TH1       ;读取脉冲宽度高低字节值;分别存放于30H和31H中
   13:	  0049	85 8B 31	    	MOV  31H, TL1       ;分别存放于30H和31H中
   14:	  004C	80 FE		    	SJMP $
   15:					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
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
MAIN				  CODE	    0030	   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
RESET				  CODE	    0000
RI				  BIT	      98
RL1				  CODE	    0039	   7
RL2				  CODE	    003E	   9
RL3				  CODE	    0041	  10
RS0				  BIT	      D3
RS1				  BIT	      D4
RXD				  BIT	      B0
SBUF				  DATA	      99
SCON				  DATA	      98

ASEM-51 V1.2                                         Copyright (c) 1996 by W.W. Heinz                                         PAGE 3



SYMBOL				  TYPE     VALUE	LINE
------------------------------------------------------------
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
TXD				  BIT	      B1
WR				  BIT	      B6