(大杂烩)proteus仿真MCS51一百例
源代码在线查看： pwm.lst
A51 MACRO ASSEMBLER PWM 08/03/2006 11:16:36 PAGE 1
MACRO ASSEMBLER A51 V8.00
OBJECT MODULE PLACED IN PWM.OBJ
ASSEMBLER INVOKED BY: e:\Program Files\Keil\C51\BIN\A51.EXE PWM.asm SET(SMALL) DEBUG EP
LOC OBJ LINE SOURCE
0035 1 ADC EQU 35H
00A4 2 CLOCK BIT P2.4 ;定义ADC0808时钟位
00A5 3 ST BIT P2.5
00A6 4 EOC BIT P2.6
00A7 5 OE BIT P2.7
00B7 6 PWM BIT P3.7
0000 7 ORG 00H
0000 800C 8 SJMP START
000B 9 ORG 0BH
000B 02003E 10 LJMP INT_T0
11
000E 758902 12 START: MOV TMOD,#02H
0011 758C14 13 MOV TH0,#20
0014 758A00 14 MOV TL0,#00H
0017 75A882 15 MOV IE,#82H
001A D28C 16 SETB TR0
17
001C C2A5 18 WAIT: CLR ST
001E D2A5 19 SETB ST
0020 C2A5 20 CLR ST ;启动AD转换
0022 30A6FD 21 JNB EOC,$ ;等待转换结束
0025 D2A7 22 SETB OE
0027 859035 23 MOV ADC,P1 ;读取AD转换结果
002A C2A7 24 CLR OE
002C D2B7 25 SETB PWM
002E E535 26 MOV A,ADC
0030 120041 27 LCALL DELAY
0033 C2B7 28 CLR PWM
0035 74FF 29 MOV A,#255
0037 9535 30 SUBB A,ADC
0039 120041 31 LCALL DELAY
003C 80DE 32 SJMP WAIT
33
003E B2A4 34 INT_T0: CPL CLOCK ;提供ADC0808时钟信号
0040 32 35 RETI
36
0041 7E01 37 DELAY: MOV R6,#1
0043 DEFE 38 D1: DJNZ R6,D1
0045 D5E0FB 39 DJNZ ACC,D1
0048 22 40 RET
41
42 END
A51 MACRO ASSEMBLER PWM 08/03/2006 11:16:36 PAGE 2
SYMBOL TABLE LISTING
------ ----- -------
N A M E T Y P E V A L U E ATTRIBUTES
ACC. . . . . . . . D ADDR 00E0H A
ADC. . . . . . . . N NUMB 0035H A
CLOCK. . . . . . . B ADDR 00A0H.4 A
D1 . . . . . . . . C ADDR 0043H A
DELAY. . . . . . . C ADDR 0041H A
EOC. . . . . . . . B ADDR 00A0H.6 A
IE . . . . . . . . D ADDR 00A8H A
INT_T0 . . . . . . C ADDR 003EH A
OE . . . . . . . . B ADDR 00A0H.7 A
P1 . . . . . . . . D ADDR 0090H A
P2 . . . . . . . . D ADDR 00A0H A
P3 . . . . . . . . D ADDR 00B0H A
PWM. . . . . . . . B ADDR 00B0H.7 A
ST . . . . . . . . B ADDR 00A0H.5 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
WAIT . . . . . . . C ADDR 001CH A
REGISTER BANK(S) USED: 0
ASSEMBLY COMPLETE. 0 WARNING(S), 0 ERROR(S)
