GTX接口在宽带自适应传输中的应用  

Application of GTX interface in broadband adaptive transmission

作　　者：杨云鹏 许波 高媛 贾树林 颜雁军 赵佳 Yang Yunpeng;Xu bo;Gao Yuan;Jia Shulin;Yan Yanjun;Zhao Jia(College of Automation Engineering,University of Electronic Science and Technology,Chengdu 610000,China;Military Commission Equipment Development Department,Beijing 100000,China;School of Humanities and Information Management,Chengdu Medical College,Chengdu 610500,China)

机构地区：[1]电子科技大学自动化工程学院,成都610000 [2]军委装备发展部某中心,北京100000 [3]成都医学院人文信息管理学院,成都610500

出　　处：《电子测量与仪器学报》2020年第3期171-179,共9页Journal of Electronic Measurement and Instrumentation

基　　金：国家自然科学基金(51607024)资助项目。

摘　　要：针对不同数据带宽数据流实时传输和FPGA高速收发器传输速度固定的现状,提出了一种宽带自适应串行数据实时传输系统。发送端首先对待发送数据进行位宽转换和跨时钟域处理,再对数据进行标记和编码,最后通过GTX发送端口发送数据。接收端首先根据控制码和标记位解析有效数据,最后通过接收缓存模块进行位宽转换和跨时钟域处理。将该系统应用于示波记录仪采集数据传输中,当配置GTX线速度为4.5 Gbps时,15种采集卡的数据均能正确接收。该传输系统针对不同采集卡只需修改发送端缓存FIFO的写数据位宽,具有代码可移植性强、硬件平台兼容性强的特点。Aiming at the current situation of real-time data stream transmission of different data bandwidths and fixed transmission speed of FPGA high-speed transceivers, this paper proposes a broadband adaptive serial data real-time transmission system. The sender first performs bit-width conversion and cross-clock domain processing on the transmitted data, then marks and encodes the data, and finally transmits data through the GTX transmission port. The receiving end first parses the valid data according to the control code and the flag bit, and finally performs bit width conversion and cross clock domain processing through the receiving buffer module. The system is applied to the acquisition data transmission of the oscilloscope. When the GTX line speed is 4.5 Gbps, the data of the 15 types of acquisition cards can be correctly received. The transmission system only needs to modify the write data bit width of the buffer FIFO at the transmitting end for different acquisition cards, which has the characteristics of strong code portability and strong hardware platform compatibility.

关 键 词：高速数据流 GTX 宽带自适应 FPGA 

分 类 号：TP23[自动化与计算机技术—检测技术与自动化装置] TM935.37[自动化与计算机技术—控制科学与工程]