| RS-485总线的高速串行远距离数据传输 |
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| 引用本文： | 李成,王鹏,丁天怀,陈恳,耿立中. RS-485总线的高速串行远距离数据传输[J]. 清华大学学报(自然科学版), 2009, 49(5): 684-687 |
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| 作者姓名： | 李成 王鹏 丁天怀 陈恳 耿立中 |
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| 作者单位： | 清华大学,精密仪器与机械学系,北京,100084;清华大学,精密仪器与机械学系,北京,100084;清华大学,精密仪器与机械学系,北京,100084;清华大学,精密仪器与机械学系,北京,100084;清华大学,精密仪器与机械学系,北京,100084 |
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| 摘 要： | 为实现工业参数的高速远距离长线传输,应用FPGA技术,设计并实现了一种基于RS-485总线的高速串行数据传输方法。分析RS-485数据传输的影响因素,阐述系统总体结构,由时钟脉冲传输测试确定了外围接口。利用串行信号的跳变沿作为高速时钟采样检测的起点以实现位同步,采用8B/10B的链路编码方案,支持高速时钟恢复和数据帧同步,并以双绞线作为传输介质进行了数据传输实验。结果表明:系统在20Mb/s传输速率下实现了串行编码数据流沿220m双绞线电缆的高速远距离数据传输,误码率可达10-11,为现场原始数据监测提供了高效的传输方法。
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| 关 键 词： | 串行通信 RS-485总线 高速 远距离数据传输 |
RS-485 bus-based high-speed serial remote data transmissions |
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| LI Cheng,WANG Peng,DING Tianhuai,CHEN Ken,GENG Lizhong. RS-485 bus-based high-speed serial remote data transmissions[J]. Journal of Tsinghua University(Science and Technology), 2009, 49(5): 684-687 |
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| Authors: | LI Cheng WANG Peng DING Tianhuai CHEN Ken GENG Lizhong |
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| Affiliation: | Department of Precision Instrument and Mechanology;Tsinghua University;Beijing 100084;China |
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| Abstract: | A high-speed serial data transmission method based on the RS-485 bus was developed using FPGA technology to implement the high-speed remote long wire transmission for industrial systems.The effects of the RS-485 bus on the data transmission are analyzed with the peripheral interface circuits then determined by pulse transmission experiments.The rising/falling edges of the serial signals are used as the start symbols for the high-speed clock sampling to enable bit synchronization.The 8 B/10 B encoded data st... |
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| Keywords: | serial communication RS-485 bus high speed remote data transmission |
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