A51 MACRO ASSEMBLER TIMER_APPLICATION__2_ 07/28/2006 16:15:42 PAGE 1
MACRO ASSEMBLER A51 V8.00
OBJECT MODULE PLACED IN Timer Application (2).OBJ
ASSEMBLER INVOKED BY: e:\Program Files\Keil\C51\BIN\A51.EXE Timer Application (2).asm SET(SMALL) DEBUG EP
LOC OBJ LINE SOURCE
0030 1 COUNT EQU 30H
0031 2 FLASH EQU 31H
0000 3 ORG 00H
0000 800C 4 SJMP START
000B 5 ORG 0BH ;定
时器0中断入口
000B 020024 6 LJMP INT_T0
000E 753000 7 START: MOV COUNT,#00H
0011 753100 8 MOV FLASH,#00H
0014 758901 9 MOV TMOD,#01H ;定时器工作
方式1
0017 758C3C 10 MOV TH0,#(65536-50000)/256 ;定时器初值
001A 758AB0 11 MOV TL0,#(65536-50000) MOD 256
001D 75A882 12 MOV IE,#82H ;开中断
0020 D28C 13 SETB TR0 ;启动定时器
0022 80FE 14 SJMP $ ;等待中断
0024 E530 15 INT_T0: MOV A,COUNT
0026 B40011 16 CJNE A,#00H,I1 ;D1闪烁
0029 B290 17 CPL P1.0
002B 0531 18 INC FLASH
002D E531 19 MOV A,FLASH
002F B42845 20 CJNE A,#40,RETUNE ;达到2秒?
0032 753100 21 MOV FLASH,#00H
0035 0530 22 INC COUNT
0037 020077 23 LJMP RETUNE ;D2闪烁
003A B40111 24 I1: CJNE A,#01H,I2
003D B291 25 CPL P1.1
003F 0531 26 INC FLASH
0041 E531 27 MOV A,FLASH
0043 B42831 28 CJNE A,#40,RETUNE ;达到2秒?
0046 753100 29 MOV FLASH,#00H
0049 0530 30 INC COUNT
004B 020077 31 LJMP RETUNE
004E B40211 32 I2: CJNE A,#02H,I3 ;D3闪烁
0051 B292 33 CPL P1.2
0053 0531 34 INC FLASH
0055 E531 35 MOV A,FLASH
0057 B4281D 36 CJNE A,#40,RETUNE ;达到2秒?
005A 753100 37 MOV FLASH,#00H
005D 0530 38 INC COUNT
005F 020077 39 LJMP RETUNE
0062 B40312 40 I3: CJNE A,#03H,RETUNE ;D4闪烁
0065 B293 41 CPL P1.3
0067 0531 42 INC FLASH
0069 E531 43 MOV A,FLASH
006B B42809 44 CJNE A,#40,RETUNE ;达到2秒?
006E 753100 45 MOV FLASH,#00H
0071 753000 46 MOV COUNT,#00H
0074 020077 47 LJMP RETUNE
0077 758C3C 48 RETUNE: MOV TH0,#(65536-50000)/256
007A 758AB0 49 MOV TL0,#(65536-50000) MOD 256
007D 32 50 RETI
51 END
A51 MACRO ASSEMBLER TIMER_APPLICATION__2_ 07/28/2006 16:15:42 PAGE 2
SYMBOL TABLE LISTING
------ ----- -------
N A M E T Y P E V A L U E ATTRIBUTES
COUNT. . . . . . . N NUMB 0030H A
FLASH. . . . . . . N NUMB 0031H A
I1 . . . . . . . . C ADDR 003AH A
I2 . . . . . . . . C ADDR 004EH A
I3 . . . . . . . . C ADDR 0062H A
IE . . . . . . . . D ADDR 00A8H A
INT_T0 . . . . . . C ADDR 0024H A
P1 . . . . . . . . D ADDR 0090H A
RETUNE . . . . . . C ADDR 0077H A
START. . . . . . . C ADDR 000EH A
TH0. . . . . . . . D ADDR 008CH A
TL0. . . . . . . . D ADDR 008AH A
TMOD . . . . . . . D ADDR 0089H A
TR0. . . . . . . . B ADDR 0088H.4 A
REGISTER BANK(S) USED: 0
ASSEMBLY COMPLETE. 0 WARNING(S), 0 ERROR(S)
