| 基于C51的DS18B20驱动电路设计 |
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| 引用本文： | 柴锁柱,王炳章,赵秋. 基于C51的DS18B20驱动电路设计[J]. 传感器世界, 2007, 13(8): 36-39 |
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| 作者姓名： | 柴锁柱 王炳章 赵秋 |
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| 作者单位： | 河北沧州师范专科学校;南京工业职业技术学院自动化系 |
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| 摘 要： | 针对1-Wire总线器件DS18B20与单片机直接连接时单片机I/O端口驱动能力不足,存在限制传感器数量和传输距离的问题,本文设计了一种驱动电路.通过C51编程,可实现1-Wire总线数据的双向传输.在不增加单片机I/O端口资源占用的情况下,驱动电路可以接成主从方式使用,使1-Wire总线可驱动的传感器数量和传输距离有了极大提高.该电路已用于由DS18B20实现测温的粮仓测温系统中.
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| 关 键 词： | 1-Wire总线 驱动电路 温度传感器 DS18B20 C51 |
| 文章编号： | 1006-883X（2007）08-0036-04 |
Design A Driver Circuit For DS18B20 Based On C51 |
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| Abstract: | When connecting the 1-wire bus component DS18B20 with single chip microcomputer directly, the driving ability of I/O port of main controller is week, and numbers of sensors and the transmission distance are limited, Aiming at this problem, a driver circuit was designed. The bi-directional transmission of 1-wire bus can be achieved by programming with C51. Without additional resource occupation of single chip microcomputer, the driver circuit can be used by cascade mode. The number of sensors and the transmission distance can be enhanced greatly. It has been used in the temperature measuring system composed of DS18B20 for granary successful. |
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| Keywords: | 1-wire bus driver circuit temperature sensor DS18B20 C51 |
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