摘要
介绍了通用串行总线(USB)的基本结构和通信协议.以TUSB3410为核心设计了一个RS485-USB转换器,分析了此转换器的电路原理和编写固件(firmware)的方法.论述了USB在windows平台下的WDM驱动程序原理,并提出了编写此转换器驱动程序的一种方法.最后给出一个利用该转换器实现大型粮库测温系统的实例.
The basic structure and the communication protocol of Universal Serial Bus (USB) were introduced in this paper.An RS485-USB converter was designed by using TUSB3410 as the core.The principle of this convert's circuit and a method of programming firmware were analysed.The principle of USB's WDM drivers based on windows was discussed and a method of programing converter's drivers was presented.At last an example of realizing temperature measurement system for a great grain depot was given.
出处
《应用科技》
CAS
2004年第2期27-29,共3页
Applied Science and Technology
