CN101001181A - Portable MVB network data analyser based on USB interface type - Google Patents

Abstract

This invention discloses a portable MVB network data analyzer based on USB interface including a MVB physical interface with a redundant function, a MVB network protocol controller and C8051F340 primary processor characterizing in including a USB bus interface, which is the interface circuit of the USB bus to outside to realize data exchange of a PC and the data analyzer and protection of USB self supply, over voltage and over current and switch of hardware data stream adaptive function by the USB interface.

Description

Portable MVB network data analyser based on the USB interface type

Technical field

The present invention relates to exploitation, debugging and the trial-production field of the MVB network system at TCN standard network scene.

Background technology

TCN standard network bus MVB is a kind of novel network system that is exclusively used in railway territory, because its reliability, flexibility and adopted by more and more countries in the world.But professional very strong because of MVB, be mainly used in special dimensions such as railway and part electric power system, in addition because MVB technology and on-the-spot power supply technique all are relatively to be difficult to the problem that solves etc., so at present available means of testing and tester are also seldom, especially be suitable for the on-the-spot portable MVB analytical equipment of using blank especially.Fortunately, the development of USB (Universal Serial Bus) technology, with popularizing and the extensive application of USB interface technology of the advantage of its high speed (12Mbps) and self-powered technology and portable computer,, we provide convenience for developing this analytical and testing instrument.

Because the TCN-MVB network technology is the industry spot network technology that meets the IEC61375-1 international standard, usb bus then is the general-purpose interface bus of main flow, so portable MVB analyzer that both combinations are constituted, have that volume is little, flexibility good, highly versatile, advantage such as easy to use, filled up this instrument design blank at home.

Summary of the invention

The purpose of this invention is to provide a kind of Portable MVB network data analytic product based on TCN-MVB network system and USB interface.

Technical solution of the present invention is achieved in that

A kind of Portable MVB network data analyser based on the USB interface type comprises MVB network standard interface, MVB procotol controller and C8051F340 primary processor with redundancy feature, it is characterized in that also comprising the usb bus interface; The external interface circuit that described usb bus interface is a usb bus is realized the exchanges data of host computer and data analyzer and the switching of USB self-powered, overvoltage and overcurrent protection and hardware data stream adaptation function by USB interface.

Technical solution of the present invention also comprises:

The information processing method of the described Portable MVB network data analyser of a kind of claim 1, its process comprise following few rapid:

(1) with primary processor, MVB protocol controller and the initialization of usb protocol controller;

(2) judge that USB has not data input, selects it then;

(3) if the data input is arranged, whether it is the MVB controller configuration information and/or reads the MVB data and select;

(4) if the configuration information input is arranged, then send configuration-direct by the MVB protocol controller; If read the MVB data command, then carry out MVB data read and/or MVB data output instruction;

(5) send the data to MVB network and/or host computer by MVB physical interface and/or USB interface.

Description of drawings

Drawings attached 4 width of cloth of the present invention, wherein:

Fig. 1 is an electrical principle block diagram of the present invention.

Fig. 2 is C8051F340 primary processor and power supply automatic switchover electric circuit diagram.

Fig. 3 is MVB protocol controller interface circuit figure.

Fig. 4 is the protection of MVB network-bus, network-driven circuit diagram.

Fig. 5 is a process flow block diagram of the present invention.

Usb bus interface in the drawings, 1, the MVB physical interface, 2, the MVB physical interface, 3, the MVB protocol controller, 4, the C8057F340 primary processor, 5.

Compared with prior art, the present invention has filled up the blank of association area, and it is small and exquisite to have a volume, be easy to carry, and high reliability, high information quantity and high flexibility, wieldy characteristics are suitable for using based on the on-the-spot field of TCN-MVB network.

Embodiment

As Fig. 1～a kind of Portable MVB network data analyser shown in Figure 4 based on the USB interface type, its structure comprises the MVB network physical interface with redundancy feature, MVB procotol controller, C8051F340 primary processor and usb bus interface, described each device is made of modular circuit respectively, and asks communication by external bus realization module.The function division of each modular circuit is as follows:

MVB network standard interface 1 and 2 with redundancy feature is physical interfaces of TCN-MVB network, and it is made up of three parts: MVB bus protection circuit, MVB bus driver and buffer circuit.

MVB bus protection circuit is the function that signal carries out protections such as " overvoltage ", " overcurrent ", " short circuit " that inputs or outputs that realizes MVB, and then sends into bus MVB bus driver.

The MVB bus driver is to convert the digital signal that protocol controller is sent here to standard MVB bus efficiency signal; then this signal is sent into network by the bus protection circuit; the perhaps MVB bus network signal of sending here through the bus protection circuit, the MVB level signal that converts standard to is sent into protocol controller.

Buffer circuit is to send into protocol controller after the level signal after the conversion of MVB bus driver is isolated through electric or magnetic, or the level signal that protocol controller is sent is delivered to the MVB bus driver after electric or magnetic is isolated, thereby realize the electrical isolation of external circuit and interior circuit, improve the antijamming capability of system.

MVB procotol controller 3 is MVB server devices, it is responsible for the various information of MVB bus are decoded by the TCN standard agreement, and deposit relevant information in internal RAM, realize simultaneously and the communication interface function of main processor unit that this function is realized by FPGA.

Usb bus physical interface 5 is external interface circuit of USB, it realizes the function of standard USB interface, realize the exchanges data and the USB self-powered technology of host computer and analyzer by USB interface, realize " overvoltage ", " overcurrent " of usb data line simultaneously, and the switching of hardware data stream adaptation function.Usb bus physical interface 5 also has the adaptive switched of USB power supply and outside direct current supply and from voltage stabilizing function, supply district is DC6～20V except above-mentioned functions.

C8031F340 master controller 4 is cores of whole gateway, and it is made up of two parts: i.e. hardware and Control Software.

The effect of hardware mainly is a work schedule of being responsible for control MVB agreement control chip, read the related data of MVB, and usb circuit, also have to protect the generation of drawing together usb data stream etc., also to be responsible for as providing of monitoring voltage, dongle, working power simultaneously etc.

The effect of software is the control requirement according to host computer, the data of MVB are uploaded to host computer by USB, or carry out the control data that host computer is sent by USB interface, and send the MVB network to by MVB protocol controller etc., realize the work such as power management, self diagnosis, multi-task scheduling, memory management of system simultaneously.Transmission and processing procedure about control data are: host computer sends control command by USB interface 5 and gives primary processor 4, and 4 pairs of instructions of sending of primary processor are resolved: send configuration signal for belonging to instruction that the MVB network side the is configured parallel external bus by primary processor 4 to MVB protocol controller 3; So to sending data to the instruction of MVB network, then the parallel external bus of related data by primary processor 4 transmitted to MVB protocol controller 3, MVB protocol controller 3 sends to the physical interface 1 and 2 of data by redundancy in the MVB network; So to requiring MVB to send data, then read the related data of MVB protocol controller 3, by USB interface data delivered to host computer then by the parallel external bus of primary processor 4.

Claims (2)

1, a kind of Portable MVB network data analyser based on the USB interface type, comprise MVB physical interface (1) and (2), MVB procotol controller (3) and 8051F340 primary processor (4), it is characterized in that also comprising usb bus interface (5) with redundancy feature; Described usb bus interface (5) is the external interface circuit of usb bus, realizes the exchanges data of host computer and data analyzer and the switching of USB self-powered, overvoltage and overcurrent protection and hardware data stream adaptation function by USB interface.

2, the information processing method of the described Portable MVB network data analyser of a kind of claim 1, its process comprises the steps:

(1) with primary processor, MVB protocol controller and the initialization of usb protocol controller;

(2) judge that USB has not data input, selects it then;

(3) if the data input is arranged, whether it is the MVB controller configuration information and/or reads the MVB data and select;

(4) if the configuration information input is arranged, then send configuration-direct by the MVB protocol controller; If read the MVB data command, then carry out MVB data read and/or MVB data output instruction;

(5) send the data to MVB network and/or host computer by MVB physical interface (1) or (2) and/or USB interface.

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