| 基于FT8U232BM的USB-HART通信接口的开发 |
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| 引用本文： | 夏建锋,肖华军,包丽惠. 基于FT8U232BM的USB-HART通信接口的开发[J]. 自动化仪表, 2006, 27(5): 17-20 |
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| 作者姓名： | 夏建锋 肖华军 包丽惠 |
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| 作者单位： | 上海工业自动化仪表研究所,上海,200233 |
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| 摘 要： | 基于HART沸议的现场仪表已普遍使用，这些仪表主要是通过传统的RS-232接口实现同上位机之间的通信。基于FT8U232BM芯片开发的USB-HART通信接口，以其传输速度快、占用资源少以及真正意义上的即捅即用等优点，正在逐步取代RS-232接口。详细叙述了USB／RS-232双向转换芯片FT8U232BM以及Hart调出解调器芯片A5191的工作原理、内部结构、引脚分布及功能，并给出了利用此二者实现的USB／HART通信接口典型电路设计方案和驱动软件。实践证明它是一种经济高效的设计方案。
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| 关 键 词： | 驱动软件 即插即用 虚拟串口 |
| 收稿时间： | 2005-08-17 |
| 修稿时间： | 2005-08-17 |
Development of FT8U232BM Based USB-HART Communication Interface |
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| Xia Jianfeng,Xiao Huajun,Bao Lihui. Development of FT8U232BM Based USB-HART Communication Interface[J]. Process Automation Instrumentation, 2006, 27(5): 17-20 |
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| Authors: | Xia Jianfeng Xiao Huajun Bao Lihui |
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| Affiliation: | Xia Jianfeng Xiao Huajun Bao Lihui |
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| Abstract: | Most of the HART protocol, based field instruments have been popularly used. These instruments are communicated with host computer through traditional RS-232 interface. The USB-HART communication interface developed based on FT8U232BM chip replaces RS-232 interface. It features fast speed to transmit, using less resource and plug-and-play. The principle of operation, internal structure, pin designation and functions of USB/RS-232 bi-directional conversion chip FT8U232BM and A519 are described in detail. Design strategy of typical circuit and drive software of USB/HART communication interface composed of above two chips is provided. The practice proves that it is an economical and highly efficient design strategy. |
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| Keywords: | Drive software Plug-and-play Virtual serial port |
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