Hardware Design Of Bridge Module For Distributed Data Acquisition System Based On Hi Silicon Processor

Distributed data acquisition systems are widely used in my country's marine scientific research,ocean exploration and other fields.With the intensification of the"trade war" and "ban on sales" initiated by the United States,the import of key components of the core components of the distributed data acquisition system has been greatly restricted,exposing the existence of systems developed with imported devices and being "stuck" by other countries."risks of.Therefore,there is a very urgent need to independently develop a localized distributed data acquisition system.This thesis has developed a distributed data acquisition system bridging subsystem based on Hi Silicon processor.The bridging subsystem is designed with Hi Silicon Hi3798 series processors as the core,and exchanges data with China Micro's highperformance SMQ7K325 T series FPGA through the extended high-speed PCIe interface to realize the reception,preprocessing and forwarding of large-scale collected signals.The processor expands 2 Gigabit Ethernet electrical interfaces for data interaction with back-end signal analysis equipment,and expands 1 RS-422 serial port to receive device sensor data;FPGA expands 4 Fast Ethernet optical interfaces for frontend acquisition nodes Data reception.This system is designed with 100% domestic devices,which has the characteristics of low power consumption,high bandwidth and good scalability.In this thesis,board-level debugging and functional testing of the bridge subsystem,including the power supply of the hardware circuit,key signals,machine functions,power consumption,etc.,are tested.The test results meet the design requirements,and the system works stably under the maximum bandwidth.