mvb bus decoding and on-board recording system based on sopc technology

Abstract

The invention relates to an MVB (Multifunction Vehicle Bus) bus decoding and on-vehicle recording system based on an SOPC technology. The system comprises an FPGA chip, an EPCS serial FLASH chip, an SDRAM chip, an SRAM chip, an SD card and an MVB level switching circuit, wherein the FPGA chip comprises an NIOS-II soft-core processor, a phase-locked loop frequency multiplier, an MVB decoder, an SRAM read / write controller, an SPI switching module and an SPI; the NIOS-II soft-core processor is connected with the EPCS serial FLASH chip, the SDRAM chip, the phase-locked loop frequency multiplier, the MVB decoder, the SRAM read / write controller and the SPI; the MVB decoder is connected with the phase-locked loop frequency multiplier, the MVB level switching circuit and the SRAM read / write controller; and the SPI switching module is connected with the SPI interface, the SRAM read / write controller and the SD card. Compared with the prior art, the MVB bus decoding and on-vehicle recording system disclosed by the invention has the advantages of software and hardware integration, high reliability, convenience in operation, high real-time property and the like.

Description

technical field [0001] The invention relates to an MVB bus data analysis and storage technology, in particular to an SOPC technology-based MVB bus decoding and on-board recording system. Background technique [0002] With the development of high-speed railway and modern rail transit technology, Train Communication Network (TCN) has become a mainstream vehicle and train data communication system. The IEC-61375 standard of the International Electrotechnical Commission divides the train communication network into the articulated train bus WTB (WireTrain Bus) for connecting each section and the multifunction vehicle bus MVB (Multifunction Vehicle Bus) for connecting the fixed equipment in the vehicle. ). Compared with the application of other common field buses on trains, MVB has greater advantages in terms of real-time performance, reliability, manageability, medium access control method, addressing mode and communication service types. [0003] MVB bus data takes frames as t...

AI Technical Summary

Problems solved by technology

Although the traditional MVB communication controller chip includes the complete functions of the MVB data link layer and the application layer, it is not suitable as a self-developed MVB bus analyzer because of its high cost, complicated use, and technology monopoly by foreign companies. preferred

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