timer0-0.lst

22个51单片机的实例


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:	TIMER0-0.ASM
	Object File:	TIMER0-0.HEX
	List File:	TIMER0-0.LST



 Line  I  Addr  Code            Source

    1:		N      0000		ORG 00H
    2:	  0000	02 00 30		JMP MAIN
    3:		N      0030		ORG 30H
    4:	  0030	75 89 00	MAIN:	MOV	TMOD,#00H	;设置TIMER0工作在MODE0
    5:	  0033	7C 00			MOV	R4,#00H		;记数指针初值
    6:				;------------------------------------
    7:	  0035	8C A0		START:	MOV	P2,R4		;将记数指针初值输出至P2
    8:	  0037	7B C8			MOV	R3,#200		;延迟1s
    9:	  0039	12 00 43		CALL	DELAY		;
   10:	  003C	CC			XCH	A,R4		;将记数指针值与累加器的内容交换
   11:	  003D	24 01			ADD	A,#01		;累加器加1
   12:	  003F	D4			DA	A		;做十进制调整
   13:	  0040	CC			XCH	A,R4		;将累加器的内容与记数指针交换
   14:	  0041	80 F2			JMP	START
   15:				;-------------------------
   16:	  0043	D2 8C		DELAY:	SETB	TR0	;启动定时器0开始计数
   17:	  0045	75 8A 18	AGAIN:	MOV	TL0,#(8192-5000) MOD 32	; 设置TL0的初值
   18:	  0048	75 8C 63		MOV	TH0,#(8192-5000)/32	;设置TH0的初值
   19:	  004B	10 8D 02	LOOP2:	JBC	TF0,LOOP3	;TF0是否为1，是则跳到LOOP3，并清除TF0
   20:	  004E	80 FB			JMP	LOOP2	;不是则跳到LOOP2
   21:	  0050	DB F3		LOOP3:	DJNZ	R3,AGAIN	;R3是否为0？不是则跳到AGAIN
   22:	  0052	C2 8C			CLR	TR0	;是则停止TIMER0计数
   23:	  0054	22			RET
   24:					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
AGAIN				  CODE	    0045	  17
B				  DATA	      F0
CY				  BIT	      D7
DELAY				  CODE	    0043	  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
LOOP2				  CODE	    004B	  19
LOOP3				  CODE	    0050	  21
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
RS0				  BIT	      D3
RS1				  BIT	      D4
RXD				  BIT	      B0
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	    0035	   7
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