p_width.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:	P_WIDTH.ASM
	Object File:	P_WIDTH.HEX
	List File:	P_WIDTH.LST



 Line  I  Addr  Code            Source

    1:				;这是一个利用T1的门控位测量脉冲宽度的例子
    2:				;系统的晶振频率12MHz，一个外部脉冲的高电平宽度<65536个机器周期，
    3:				;将此脉冲信号接到INT1引脚上做为T1的门控信号，测试其正脉冲的宽度
    4:				;将测得的高8位值存入片内41H，低8位存入40H单元中。
    5:		N      0041	TIME_H	EQU	41H
    6:		N      0040	TIME_L	EQU	40H
    7:		N      0000		ORG	0
    8:	  0000	75 89 90		MOV	TMOD,#90H	;T1工作在方式1，定时器方式，启用门控
    9:	  0003	75 8B 00	LOOP:	MOV	TL1,#0
   10:	  0006	75 8D 00		MOV	TH1,#0
   11:	  0009	78 40			MOV	R0,#TIME_L
   12:	  000B	20 B3 FD		JB	P3.3,$		;等待INT1引脚变为低电平
   13:	  000E	D2 8E			SETB	TR1		;启动T1定时
   14:	  0010	30 B3 FD		JNB	P3.3,$		;等待INT1引脚变为高电平来启动定时
   15:	  0013	20 B3 FD		JB	P3.3,$		;等待INT1引脚再次变为低电平
   16:	  0016	C2 8E			CLR	TR1		;停止定时
   17:	  0018	A6 8B			MOV	@R0,TL1		;存时间值
   18:	  001A	08			INC	R0
   19:	  001B	A6 8D			MOV	@R0,TH1
   20:	  001D	80 E4			SJMP	LOOP
   21:					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
LOOP				  CODE	    0003	   9
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
SBUF				  DATA	      99
SCON				  DATA	      98
SINT				  CODE	    0023
SM0				  BIT	      9F
SM1				  BIT	      9E

ASEM-51 V1.2                                         Copyright (c) 1996 by W.W. Heinz                                         PAGE 3



SYMBOL				  TYPE     VALUE	LINE
------------------------------------------------------------
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
TIME_H				  NUMBER    0041	   5
TIME_L				  NUMBER    0040	   6
TL0				  DATA	      8A
TL1				  DATA	      8B
TMOD				  DATA	      89
TR0				  BIT	      8C
TR1				  BIT	      8E
TXD				  BIT	      B1
WR				  BIT	      B6