MVB network card module based on embedded processor and data transmission method

Abstract

The invention relates to an MVB network card module based on an embedded processor and a data transmission method. The MVB network card module comprises an ARM embedded processing circuit unit, an FPGA protocol analysis circuit unit, an MVB interface circuit unit and an isolation power circuit unit; the MVB network card module is connected with a TCN gateway through a PC104 bus. The data transmission method includes the steps that (1) front-end data enter the MVB interface circuit unit through an MVB bus to conduct level switching, isolated or non-isolated differential signals obtained after level switching are converted into TTL signals, and the TTL signals enter the FPGA protocol analysis circuit unit; (2) after being processed, the front-end data are transmitted into the ARM embedded processing circuit unit through a 32-bit parallel data interface; (3) the ARM embedded processing circuit unit conducts protocol processing on the data and communication control over the PC104 bus, and the data are transmitted to a TCN gateway processor. The MVB network card module is clear in structure, an embedded type FLASH main control chip is applied, the integration level is high, and the MVB network card module and the data transmission method are stable and reliable.

Description

technical field [0001] The invention relates to a small-sized multifunctional vehicle bus MVB (Multifunction Vehicle Bus) network card module and a data transmission method based on an embedded processor, which are used for communication interfaces in high-speed train systems. Background technique [0002] The high-speed train central control unit CCU (Central Control Unit) is composed of a power supply module, a central processing unit CPU, a TCN gateway, an IO module, a bus management module, and a backplane. Protect. [0003] Train Communication Network (TCN-Train Communication Network) is a data communication network that interconnects train vehicles and programmable devices inside vehicles to transmit control, monitoring and diagnostic information. With the intelligence of contemporary trains, the train communication network contains more information, such as status, control, fault diagnosis, passenger information, etc. How to analyze the train operation data so as to ...

AI Technical Summary

Problems solved by technology

At present, the research and development of domestic high-speed train system has just started, and the imported MVB network card is relatively large, and there is no stable and reliable miniaturized MVB network card module

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