摘要
介绍了一款简易数字温度仪的设计。列出温度传感器DS18B20的基本特性。由于DS18B20具有直接输出数字信号、单总线接口、成本低等优点,将其应用在由单片机AT89C2051为核心的家庭环境监测系统中作为测温探头。给出了相应的硬件接口电路、软件流程及主要程序代码。并针对DS18B20对时序要求十分严格的特点给出了详细的介绍。
This article introduces the basie characteristics of D518B20. Becase D518B20. has a series ot cnaractenstacs sucn as digital output, 1-wire interface and low cost,it is applied to the environment detection system as temperature measuring probe. The system is composed of AT89C2051 and kinds of environmcnt sensors. This article also gives the corresponding hardware interface circuit, software flow diagram and the primary code. According to the characteristic of DS18B20 that DS18B20 is strict to the time slots,this article provides an actually introduction.
出处
《电脑知识与技术》
2006年第9期150-151,共2页
Computer Knowledge and Technology
基金
桂林工学院科研启动金(006011231)。
