ex5-4.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:	EX5-4.ASM
	Object File:	EX5-4.HEX
	List File:	EX5-4.LST



 Line  I  Addr  Code            Source

    1:		N      0000		ORG  0000H                ;复位入口
    2:	  0000	02 00 1E		LJMP	MAIN              ;转到主程序
    3:		N      000B		ORG  000BH                ;T0中断入口
    4:	  000B	02 00 3E		LJMP	TT0               ;转到T0中断服务程序
    5:		N      001E		ORG  0030                 ;主程序入口
    6:	  001E	75 81 60	MAIN:	MOV  SP,#60H              ;设置堆栈指针
    7:	  0021	75 20 0A		MOV  20H,#0AH             ;设置中断次数
    8:	  0024	75 30 00		MOV  30H,#00H             ;时、分、秒单元清0
    9:	  0027	75 31 00		MOV  31H,#00H
   10:	  002A	75 32 00		MOV  32H,#00H
   11:	  002D	75 89 01		MOV  TMOD,#01H            ;设置T0工作方式
   12:	  0030	75 8C 3C		MOV  TH0,#3CH             ;装入T0初值
   13:	  0033	75 8A B0		MOV  TL0,#0B0H
   14:	  0036	D2 8C			SETB TR0                  ;启动T0
   15:	  0038	D2 AF			SETB EA                   ;开中断
   16:	  003A	D2 A9			SETB ET0                  ;允许T0中断
   17:	  003C	80 FE			SJMP $                    ;等待中断
   18:	  003E	C0 D0		TT0:	PUSH PSW                  ;保护现场
   19:	  0040	C0 E0			PUSH ACC
   20:	  0042	75 8C 3C		MOV  TH0,#3CH             ;重装T0初值
   21:	  0045	75 8A B0		MOV  TL0,#0B0H
   22:	  0048	D5 20 33		DJNZ 20H,RT               ;1秒定时未到，返回
   23:	  004B	75 20 0A		MOV  20H,#0AH             ;重置中断次数
   24:	  004E	74 01			MOV  A,#01H
   25:	  0050	25 32			ADD  A,32H                ;秒单元加1
   26:	  0052	D4			DA   A                    ;十进制调整
   27:	  0053	F5 32		   	MOV  32H,A                ;转换为BCD码
   28:	  0055	B2 90		   	CPL  P1.0
   29:	  0057	B4 60 24		CJNE A,#60H,RT            ;未到60秒，返回
   30:	  005A	75 32 00		MOV  32H,#00H             ;到60秒，秒单元清0
   31:	  005D	74 01			MOV  A,#01H
   32:	  005F	25 31			ADD  A,31H                ;分单元加1
   33:	  0061	D4			DA   A                    ;十进制调整
   34:	  0062	F5 31			MOV  31H,A                ;转换为BCD码
   35:	  0064	B2 92		   	CPL  P1.2
   36:	  0066	B4 60 15	   	CJNE A,#60H,RT            ;未到60分，返回
   37:	  0069	75 31 00		MOV  31H,#00H             ;到60分，分单元清0
   38:	  006C	74 01			MOV  A,#01H
   39:	  006E	25 30			ADD  A,30H                ;时单元加1
   40:	  0070	D4			DA   A                    ;十进制调整
   41:	  0071	F5 30			MOV  30H,A                ;转换为BCD码
   42:	  0073	B2 94			CPL  P1.4
   43:	  0075	B4 24 06		CJNE A,#24H,RT            ;未到24小时,返回

ASEM-51 V1.2                                         Copyright (c) 1996 by W.W. Heinz                                         PAGE 2



 Line  I  Addr  Code            Source

   44:	  0078	75 30 00		MOV  30H,#00H             ;到24小时,时单元清0
   45:	  007B	75 90 00		MOV  P1,#00H
   46:	  007E	D0 E0		RT:     POP  ACC                  ;恢复现场
   47:	  0080	D0 D0		        POP  PSW
   48:	  0082	32		        RETI	                  ;中断返回
   49:					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
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	    001E	   6
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
RT				  CODE	    007E	  46
RXD				  BIT	      B0
SBUF				  DATA	      99
SCON				  DATA	      98
SINT				  CODE	    0023
SM0				  BIT	      9F

ASEM-51 V1.2                                         Copyright (c) 1996 by W.W. Heinz                                         PAGE 4



SYMBOL				  TYPE     VALUE	LINE
------------------------------------------------------------
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
TT0				  CODE	    003E	  18
TXD				  BIT	      B1
WR				  BIT	      B6