DS18B20汇编程序Word文档格式.docx

DS18B20汇编程序Word文档格式.docx

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LJMPAAA

NOP

;

------------------读出转换后的温度值

GET_TEMPER:

SETBDQ;

定时入口

BCD:

LCALLINIT_1820

JBFLAG1,S22

LJMPCC;

若DS18B20不存在则返回

S22:

LCALLDELAY1

MOVA,#0CCH;

跳过ROM匹配------0CC

LCALLWRITE_1820

MOVA,#44H;

发出温度转换命令

LCALLDELAY

CBA:

JBFLAG1,ABC

LJMPCBA

ABC:

跳过ROM匹配

MOVA,#0BEH;

发出读温度命令

LCALLREAD_18200;

READ_1820

RET

------------------读DS18B20的程序,从DS18B20中读出一个字节的数据

READ_1820:

MOVR2,#8

RE1:

CLRC

SETBDQ

CLRDQ

MOVR3,#7

DJNZR3,$

MOVC,DQ

MOVR3,#23

RRCA

DJNZR2,RE1

-------------------写DS18B20的程序

WRITE_1820:

WR1:

MOVR3,#6

MOVDQ,C

DJNZR2,WR1

-------------------读DS18B20的程序,从DS18B20中读出两个字节的温度数据

READ_18200:

MOVR4,#2;

将温度高位和低位从DS18B20中读出

MOVR1,#36H;

低位存入36H（TEMPER_L）,高位存入35H（TEMPER_H）

RE00:

RE01:

DJNZR2,RE01

MOV@R1,A

DECR1

DJNZR4,RE00

-------------------将从DS18B20中读出的温度数据进行转换

TEMPER_COV:

MOVA,#0F0H

ANLA,TEMPER_L;

舍去温度低位中小数点后的四位温度数值

SWAPA

MOVTEMPER_NUM,A

MOVA,TEMPER_L

JNBACC.3,TEMPER_COV1;

四舍五入去温度值

INCTEMPER_NUM

TEMPER_COV1:

MOVA,TEMPER_H

ANLA,#07H

ORLA,TEMPER_NUM

MOVTEMPER_NUM,A;

保存变换后的温度数据

LCALLBIN_BCD

-------------------将16进制的温度数据转换成压缩BCD码

BIN_BCD:

MOVDPTR,#TEMP_TAB

MOVA,TEMPER_NUM

MOVCA,@A+DPTR

TEMP_TAB:

DB00H,01H,02H,03H,04H,05H,06H,07HDB08H,09H,10H,11H,12H,13H,14H,15HDB16H,17H,18H,19H,20H,21H,22H,23HDB24H,25H,26H,27H,28H,29H,30H,31HDB32H,33H,34H,35H,36H,37H,38H,39HDB40H,41H,42H,43H,44H,45H,46H,47HDB48H,49H,50H,51H,52H,53H,54H,55HDB56H,57H,58H,59H,60H,61H,62H,63HDB64H,65H,66H,67H,68H,69H,70H,71HDB72H,73H,74H,75H,76H,77H,78H,79HDB80H,81H,82H,83H,84H,85H,86H,87HDB88H,89H,90H,91H,92H,93H,94H,95H

DB96H,97H,98H,99H

-------------------DS18B20初始化程序

INIT_1820:

MOVR0,#80H

TSR1:

DJNZR0,TSR1;

延时

MOVR0,#25H;

96US-25H

TSR2:

DJNZR0,TSR2

JNBDQ,TSR3

LJMPTSR4;

TSR3:

SETBFLAG1;

置标志位,表示DS1820存在

LJMPTSR5

TSR4:

CLRFLAG1;

清标志位,表示DS1820不存在

LJMPTSR7

TSR5:

MOVR0,#06BH;

200US

TSR6:

DJNZR0,TSR6;

TSR7:

------------------重新写DS18B20暂存存储器设定值

RE_CONFIG:

JBFLAG1,RE_CONFIG1;

若DS18B20存在,转RE_CONFIG1

RE_CONFIG1:

发SKIPROM命令

MOVA,#4EH;

发写暂存存储器命令

MOVA,#00H;

TH（报警上限）中写入00H

TL（报警下限）中写入00H

MOVA,#7FH;

选择12位温度分辨率

------------------延时子程序

DELAY:

MOVR7,#00H

MIN:

DJNZR7,YS500

YS500:

LCALLYS500US

LJMPMIN

YS500US:

MOVR6,#00H

DJNZR6,$

DELAY1:

MOVR7,#20H

DJNZR7,$

显示子程序

display:

ACALLLCD_INT

MOVP1,#01H;

清屏

ACALLENABLE

MOVP1,#81H

LCALLENABLE

MOVP1,#'

T'

LCALLWRITER

='

LJMPDISP3

说明:

使用前,必须先对液晶显示模块进行初始化。

然后,先把

显示地址（位置）送到液晶模块的数据口,再调用"

ENABLE"

子程序把这个地址送入模块中。

之后,把要显示的字符的

ASCII码送到液晶模块的数据口,再调用"

WRITER"

子程序

把这个数据送入模块中让它显示出来。

======液晶模块初始化,一般放在程序开头=======

LCD_INT:

MOVLCD_DB,#01H;

MOVLCD_DB,#38H;

工作方式设置

MOVLCD_DB,#0CH;

显示状态设置

MOVLCD_DB,#06H;

输入方式设置

==============初始化结束=====================

*****************************************************************************

DISP3:

ANLA,#0F0H

LCALLNEX0

ANLA,#0FH

MOVP1,#2EH

LCALLWRITER

MOVDPTR,#TAB2

MOV36H,A

MOVA,36H

MOVP1,#0DFH

MOVP1,#43H

CC:

N'

O'

JMPDD

NEX0:

CJNEA,#00H,NEX1

MOVP1,#30H

LJMPNEX10

NEX1:

CJNEA,#01H,NEX2

MOVP1,#31H

NEX2:

CJNEA,#02H,NEX3

MOVP1,#32H

NEX3:

CJNEA,#03H,NEX4

MOVP1,#33H

NEX4:

CJNEA,#04H,NEX5

MOVP1,#34H

NEX5:

CJNEA,#05H,NEX6

MOVP1,#35H

NEX6:

CJNEA,#06H,NEX7

MOVP1,#36H

NEX7:

CJNEA,#07H,NEX8

MOVP1,#37H

NEX8:

CJNEA,#08H,NEX9

MOVP1,#38H

NEX9:

CJNEA,#09H,NEX11

MOVP1,#39H

NEX10:

NEX11:

===================模块的各个子程序===========================

=======RS=0,RW=0,E=1,使模块工作并准备接收控制指令===========

ENABLE:

CLRRS

CLRRW

CLRE

ACALLWAIT

SETBE

===读BF值,对模块进行任何操作前必须判断模块是否"

忙"

（BF=1）;

如果不"

（BF=0）才可以进行各种操作

WAIT:

MOVLCD_DB,#0FFH

CLRRS

SETBRW

JBLCD_DB.7,WAIT

=====RS=1,RW=0,E=1,写显示数据到模块指令============

WRITER:

SETBRS

==============延时==========================

DELAY1S:

MOVR5,#01

DL4_PA:

MOVR6,#100

DL4_PB:

MOVR7,#100

DJNZR6,DL4_PB

DJNZR5,DL4_PA

===========================================

DD:

End

忘了说,

51单片机必须12M晶振

否则就要改程序了