Design And Implementation Of Gigabit Ethernet Integral Circuit Based On ZYNQ

In the aviation environment,the data recorder records the data during the flight in real time and forwards the data 100 percent over Gigabit Ethernet.Through real-time recorded data,the flight environment and working performance of aircraft are assessed,providing data support for aircraft performance improvement and fault analysis.However,frequent data interaction in the network will result in burst traffic,which may lead to network congestion or even network interruption,affect data transmission,and bring great risks to the safe and stable operation of the space network.To solve the above problems,this paper uses the flow integral technology.Traffic integer is to classify,queue,cache and dispatch the incoming data stream at the network outlet according to a certain convention mechanism.The role of traffic integral type is mainly reflected in the following three aspects: according to the different real-time performance and importance of different types of data,data is classified;For the data flow exceeding the specified rate,queueing or caching is adopted,so that the data flow can be uniformly output,reducing the bandwidth pressure at the network outlet.Avoid data loss caused by network congestion and improve data transmission reliability.In this paper,XC7Z100FFG900-1 of the Zyn Q-7000 series is used as the main control chip.The ZYNQ chip consists of a dual-core ARM Cortex-A9 processor and FPGA programmable logic.The realization of data receiving,integer and forwarding on a single chip can improve the working stability and make the design between software and hardware more cooperative and flexible.Compared with software,the hardware integrated circuit has a higher processing speed,which can improve the utilization rate of bandwidth,reduce data retransmission,and thus reduce transmission delay.In this paper,different types of data transmission needs different network bandwidth for in-depth research,analysis and comparison of the implementation of traffic integer in the network,on this basis,put forward the different types of data according to the real-time and importance of different types of data,the data classification,then carry out the traffic integer scheme.CAM retrieval and matching algorithm is used to classify data,and then buffer and token bucket algorithm are combined to realize traffic integer type.In this way,network services can provide region-differentiated services according to business requirements and avoid network congestion.Finally,the experiment shows that the integral circuit can achieve the desired effect.