123456uyygbb温度传感器ds1820 的汇编程序

　

　 晶振：12M

TEMPER_L EQU 36H

TEMPER_H EQU 35H

TEMPER_NUM EQU 60H

FLAG1 BIT 00H

DQ BIT P3.3



AAA:MOV SP,#70H

LCALL GET_TEMPER

LCALL TEMPER_COV

LJMP AAA

NOP

------------------读出转换后的温度值

GET_TEMPER:

SETB DQ 定时入口

BCD:LCALL INIT_1820

JB FLAG1,S22

LJMP BCD 若DS18B20不存在则返回



S22:LCALL DELAY1

MOV A,#0CCH 跳过ROM匹配------0CC

LCALL WRITE_1820

MOV A,#44H 发出温度转换命令

LCALL WRITE_1820-Ds1820 temperature sensor 123456uyygbb the assembler crystal: 12MTEMPER_L EQU 36HTEMPER_H EQU 35HTEMPER_NUM EQU 60HFLAG1 BIT 00HDQ BIT P3.3AAA: MOV SP,# 70HLCALL GET_TEMPERLCALL TEMPER_COVLJMP AAANOP read out the converted temperature value GET_TEMPER: SETB DQ regularly import BCD: LCALL INIT_1820JB FLAG1, S22LJMP BCD if DS18B20 does not exist is returned S22: LCALL DELAY1MOV A,# 0CCH Skip ROM matching 0CCLCALL WRITE_1820MOV A,# 44H issued a temperature conversion command LCALL WRITE_1820