| 杨云鹏,许 波,高 媛,贾树林,颜雁军,赵 佳.GTX接口在宽带自适应传输中的应用[J].电子测量与仪器学报,2020,34(3):171-179 |
| GTX接口在宽带自适应传输中的应用 |
| Application of GTX interface in broadband adaptive transmission |
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| DOI： |
| 中文关键词: 高速数据流 GTX 宽带自适应 FPGA |
| 英文关键词:high-speed data stream GTX broadband adaptive FPGA |
| 基金项目:国家自然科学基金（51607024）资助项目 |
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| 摘要点击次数: 678 |
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| 中文摘要: |
| 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45 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。 |
| 英文摘要: |
| 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 45 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. |
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