Train real-time Ethernet TRDP network card based on Linux platform

Abstract

The invention relates to a train real-time Ethernet network card based on a Linux platform. The train real-time Ethernet network card comprises a core processing unit, a real-time Ethernet transceiver, a CAN interface, two UART interfaces and two common Ethernet transceivers, wherein the core processing unit is respectively connected with the two paths of common Ethernet transceivers, the real-time Ethernet transceiver, the CAN interface and the two paths of UART interfaces, and is integrated with VME backboard bus logic and interfaces; the core processing unit comprises an FPGA and an ARM loaded with a Linux platform and is used for achieving protocol conversion and data transmission between VME backboard data, CAN network data, UART network data and a TRDP network. The two paths of common Ethernet transceivers are in a hot standby redundancy relationship and are used for data redundancy sending scenes with high reliability requirements. By adopting the TRDP communication data processing method and device, high-reliability and high-real-time data processing of TRDP communication data can be achieved, and the requirements of a train communication network for real-time performance and reliability are met.

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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