A train real-time Ethernet trdp network card based on linux platform

Abstract

The invention relates to a Linux platform-based real-time Ethernet network card for trains, comprising a core processing unit, a real-time Ethernet transceiver, a CAN interface, two UART interfaces and two common Ethernet transceivers. The core processing unit is respectively connected with two common Ethernet transceivers, real-time Ethernet transceivers, CAN interface and two UART interfaces, and integrates VME backplane bus logic and interface; the core processing unit includes FPGA and ARM loaded with Linux platform , used to implement protocol conversion and data transmission between VME backplane data, CAN network data, UART network data and TRDP network; two common Ethernet transceivers are hot standby redundant, used for data with high reliability requirements Redundant sending scenarios. The invention can realize high reliability and strong real-time data processing of TRDP communication data, and meet the real-time and reliability requirements of the train communication network.

Description

technical field [0001] The invention relates to the technical field of computer communication networks, in particular to a real-time Ethernet TRDP network card for trains based on a Linux platform. Background technique [0002] The train communication network carrying control, status monitoring, and fault diagnosis information has increased requirements for network bandwidth with the development of high-speed train intelligence and the continuous improvement of safety requirements. As the International Electrotechnical Commission incorporates switched Ethernet into the IEC61375 standard of the train communication network, it marks that the international rail transit field has reached a consensus on using Ethernet to solve the TCN (Train communication network, train communication network) bandwidth problem. According to the IEC61375-2-3 standard, TRDP (Train Real-time Data Protocol, train real-time data protocol) is a train real-time Ethernet standard. [0003] The invention...

AI Technical Summary

Problems solved by technology

[0003] The invention patent with application number 201710255420.8 discloses a real-time railway Ethernet TRDP gateway based on Linux platform, which is used to realize data conversion between UART network, CAN network and TRDP network. The patent only designs one Ethernet network interface, It is difficult to meet the high reliability requirements without redundant functions, and it is difficult to meet the transmission requirements of larger data volumes with a network port transmission speed of 100Mbps

In addition, for application scenarios with high real-time requirements, the patent does not have a corresponding functional design

[0004] The utility model patent with the application number 201721070631.6 discloses a real-time Ethernet network card for trains based on the TRDP protocol. The two network ports are respectively RMII and FSMC interfaces, and the data transmission speed does not exceed 100Mbps. Cortex-M3 is used as the central processing unit. The processing capacity is limited, and it is difficult to meet the strong real-time requirements

[0005] The utility model patent with the application number 201621486327.5 discloses a dual serial port to Ethernet module. This patent does not support the TRDP protocol, and the patented dual serial port realizes adaptive switching between RS232 and RS485 through the SPS3232EEY serial port chip, so the two The serial port cannot work at the same time, and the patent does not realize the dual network port communication, which cannot meet the requirements of application scenarios with high reliability requirements, and the Cortex-M3 network processing capability is weak

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