CN201629759U - Device for realizing interconnection between MVB bus and third-party device - Google Patents

Abstract

A device for realizing interconnection between MVB bus and a third-party device is mainly applied to the railway field and comprises a CPU (1), an MVB module (3), a power module (15), a CPU minimum system and at least two bus communication interfaces, wherein the CPU (1) is connected with the MVB module (3), the power module (15) is connected with the CPU (1) and the MVB module (3), the bus communication interfaces are connected with the CPU (1), and data exchange is realized through the CPU (1) and the MVB module (3). Application of the device described in the implementation method realizes data exchange between a MVB and a plurality of interfaces on one product, has wider interface compatibility, realizes data exchange between the MVB bus and an AMS parallel bus, leads cabinet products based on the AMS bus and widely used in railways in China to be connectable into an MVB network, and greatly broadens application range of the MVB network. Additionally, the CPU adopted in the technical scheme has two kernels, can well complete real-time control function while realizing bus communication and data exchange, has more integrated functions, and can reduce peripheral modules and lower cost.

Description

A kind of device of realizing MVB bus and third party device interconnection

Technical field

The utility model relates to a kind of locomotive network communication device, especially a kind of rolling stock network communication, DTU (Data Transfer unit) of realization MVB bus and multiple third party device of being applied to.

Background technology

At present in China's locomotive network communication product, (Train CommunicationNetwork writes a Chinese character in simplified form the TCN of IEC61375 prescribed by standard, it is the train communication network, at present the TCN network standard of international standard number be IEC61375-1) network dominate day by day, while other communication modes on a large amount of the old and new's equipment still can and be deposited longer a period of time.Exist the demand that a large amount of MVB with the TCN network (multifunction vehicle bus writes a Chinese character in simplified form, i.e. multifunction vehicle bus) bus and other equipment that does not have the MVB interface interconnect in a plurality of fields such as China's subway, light rail, main-line locomotives.For example some equipment may have RS232, RS485, CAN, Ethernet or parallel bus interface, be suspended to the MVB network on system integration side is need these equipment unified, so that unified management and controlling.A kind of prior art is the cabinet formula TCN of a Finland EKE company product, and this device can be realized the exchanges data of MVB bus and VME parallel bus.This prior art adopts the cabinet formula TCN product of similar Finland EKE company, this device is because the limitation of casing structure, be unfavorable for the characteristic that the train individuality is long and narrow, the space is compact, on some vehicles, difficulty be installed, and can only realize independent MVB and VME exchanges data.On April 23rd, 2008 is open, and document number is CN101170524A, and the Chinese utility application that name is called based on the MVB-ethernet gateway of ARM discloses a kind of technical scheme that has showed independent MVB and Ethernet data exchange of examining based on ARM7.On February 13rd, 2008 is open, and document number is CN101123592A, and the Chinese utility application that name is called based on the MVB-CAN gateway of ARM7 nuclear microprocessor discloses a kind of device of examining now independent MVB and CAN exchanges data based on ARM7.These two kinds of prior aries be because a module can only realize a kind of exchanges data, and because that adopt is monokaryon CPU, when handling communication protocol stack, data exchange agreement stack, unfavorable for handling Real Time Control Function simultaneously.Other has some not in batches the product, has had the RS232 interface, but only with it as debugging interface and the exchanges data of be unrealized RS232 and MVB.At present still do not have special communication product on a standalone module, realize the exchanges data of MVB and above-mentioned multiple interfaces.

The utility model content

The purpose of this utility model is the deficiency at existing locomotive network communication product, the DTU (Data Transfer unit) of a kind of MVB of realization bus and multiple third party device is provided, carry out exchanges data to reach the third party device of on a product, realizing MVB bus and multiple interfaces, have the purpose of Interface Matching ability more widely.

According to the utility model, above-mentioned technical problem realizes by following technical proposals:

A kind of device of realizing MVB bus and third party device interconnection, comprise CPU, MVB module, power module and CPU minimum system, CPU links to each other with the MVB module, power module links to each other with the MVB module with CPU, this device also comprises at least two kinds of bus communication interfaces, described bus communication interface links to each other with CPU, carries out exchanges data by CPU and MVB module.

As the further execution mode of the utility model, described device further comprises CPLD, and CPLD links to each other with the MVB module with CPU respectively, and CPLD carries out control signal and the address signal of CPU to pass to the MVB module after the sequential adjustment.

As the further execution mode of the utility model, described device further comprises the AMS bus interface, and described AMS bus interface links to each other by CPLD and then with CPU, finishes the communication of AMS parallel bus.Thereby make a large amount of cabinet formula products that use of China railways also can be connected into the MVB network, greatly expanded the range of application of MVB network based on the AMS bus.

As the further execution mode of the utility model, described device further comprises the Ethernet interface circuit, and described Ethernet interface circuit links to each other with CPU; Described device further comprises the RS232 interface circuit, and described RS232 interface circuit links to each other with CPU; Described device further comprises the RS485 interface circuit, and described RS485 interface circuit links to each other with CPLD; Described device further comprises the CAN bus interface circuit, and described CAN bus interface circuit links to each other with CPLD.Do the exchanges data that can on a device, realize MVB bus and multiple interfaces like this, make device described in the utility model have Interface Matching ability more widely.

As the further execution mode of the utility model, described CPU comprises two kernels, and one of them kernel is carried out bus communication and data exchanging function, and another kernel is carried out Real Time Control Function.Can when realizing bus communication, data transaction, finish the Real Time Control Function of data communication well like this.

As the further execution mode of the utility model, described device comprises SDRAM and FLASH, and SDRAM links to each other with CPU, and as the running space of program, FLASH links to each other with the MVB module with CPU, CPLD respectively, as the memory space of program.

As the further execution mode of the utility model, described MVB module comprises the MVB communication controller, MVB communication memory and buffer, MVB communication controller link to each other with buffer with MVB communication memory respectively, and described buffer comprises address buffer and data buffer.

By using the described device of this kind execution mode, on a product, realized the exchanges data of MVB and multiple interfaces, have Interface Matching ability more widely.Realized the exchanges data of MVB bus and AMS parallel bus simultaneously, thereby made a large amount of cabinet formula products that use of China railways also can be connected into the MVB network, greatly expanded the range of application of MVB network based on the AMS bus.In addition, have two kernels owing to the CPU of this programme employing is actual, can when realizing bus communication, data transaction, well finish Real Time Control Function, have more integrated functionality, can reduce peripheral module, reduce cost.

Description of drawings

Fig. 1 is that the system of a kind of execution mode of the utility model forms structured flowchart;

Fig. 2 is the circuit structure schematic diagram of a kind of execution mode MVB of the utility model subsystem;

Fig. 3 is the software configuration composition frame chart of a kind of execution mode of the utility model;

Fig. 4 is the external structure schematic diagram of a kind of execution mode of the utility model;

Wherein: 1-CPU, 2-CPLD, 3-MVB module, 4-SDRAM, 5-FLASH, 6-reset circuit, 7-Ethernet interface circuit, 8-RS232 interface circuit, 9-LED, 10-NVRAM, 11-DTI, 12-DC/DC module 1,13-DC/DC module 2,14-linear power supply module, 15-power module, the 21-MVB communication interface, 22-on-scene communication interface, 23-power interface, the 24-status indicator lamp, the 25-RS232 interface, 26-Ethernet interface, 31-MVB communication controller, 32-MVB communication memory, the 33-buffer, 331-address buffer, 332-data buffer.

Embodiment:

Accompanying drawing has provided specific embodiment of the utility model, below will the utility model will be further described by drawings and Examples.

As a kind of preferred implementation of the utility model, the device of a kind of MVB of realization bus as shown in Figure 1 and third party device interconnection comprises CPU minimum system (MCF5235, FLASH, SDRAM, power supply etc.), 1 Ethernet interface, 1 RS232 interface, two CAN mouths, two 485 mouthfuls, two 485/422 mouthful, a pair of MVB mouth.

The plate level power supply partly comprises: used 5V, 3.3V, these 3 kinds of power supplys of 1.5V on the plate, the 5V power supply is exported by power module on the plate, directly supplies with the MVB subsystem and uses; 3.3V power supply is transformed by the LM2853 Switching Power Supply by the 5V power supply and gets, uses such as the IO of supply CPU, minimum system, Ethernet power supply, and adopting the reason of Switching Power Supply is in order to improve power-efficient; 1.5V power supply is transformed by the LP3882 linear power supply by the 3.3V power supply and gets, only the kernel for CPU uses, and using the reason of linear power supply is in order to guarantee the stability of CPU core voltage; When using as module, can use locomotive standard 110V power supply or use special 5V power supply, when using, use the 5V power supply of core bus as the cabinet plug-in unit.

The CPU minimum system comprises the SDRAM of CPU, MT48LC8M16A2 of MCF5235 as the FLASH of running space, SST39VF6401B or the M29W640G of the program memory space as program.MCF5235 in the coldfire CPU series of the chip employing FreeScale company of CPU1 has a kernel and an ETPU (enhancement mode clock processing unit), this CPU endorses and is used for the deal with data exchange, another kernel (ETPU unit) is exclusively used in to be realized and the closely-related controlled function of time parameter, has realized data exchanging function and Real Time Control Function on a module simultaneously efficiently.

CPU is embedded ethernet controller; therefore this programme only need add ethernet transceiver; selected the KSZ8721BLI transceiver of MICREL company for use,, increased SLVU2.8 at the Ethernet port place as anti-Surge Protector spare in addition for network interface is subjected to external impact.Utilize the embedded UART mouth of CPU, extending out MAX202 is the RS232 signal with conversion of signals, and increases PSOT15C as anti-Surge Protector spare in 232 porch.The RS485/422 mouth: realize 4 configurable UART controllers at CPLD (complicatedprogrammable logic device writes a Chinese character in simplified form, i.e. CPLD), CPU operates it as common peripheral hardware; For strengthening its protective capacities, line adopts the TVS pipe of the PSM712 of PROTEK company over the ground, and the common mode surge protective capacities of 600W is provided; 1st, 2 UART mouth physical layers only realize 485 mouthfuls, and the 3rd, 4 UART (universal asynchronous serial communication interface) mouthful of physical layer realizes that 485/422 is multiplexing, therefore can realize that at most 4 485 mouthfuls or 2 485 mouthfuls add two 422 mouthfuls; Two CAN controllers that utilize CPU to carry are realized two-way CAN interface, for strengthening its protective capacities, adopt NUP2105L to protect as common mode, and the common mode surge protective capacities of 600W is provided.DTI11 interrupts for the DMA clock, and promptly directly the memory access clock interrupts.

The circuit structure schematic diagram of MVB subsystem as shown in Figure 2, wherein MVBC is special-purpose MVB Communication Control chip, mark 331 places are address buffer, mark 332 places are data buffer, mark 32 places are MVB communication memory; The insulating power supply part owing to there is multiple bus communication, uses a plurality of DCDC insulating power supplies as shown in Figure 1; Cause impact to general supply added a mains switch that for preventing that a plurality of DCDC insulating power supplies from powering on simultaneously CPU can control this mains switch, the start-up time of staggering a plurality of DCDC insulating power supplies flexibly by the IO pin at the power supply input pin; Note that the IO pin that is used as control switch must be the 5V signal, guaranteeing does not have pressure reduction with VCC.

Nonvolatile RAM NVRAM is used for keeping in the data that will write FLASH; Because FLASH has the restriction in life-span, can not too frequent writing, therefore the data that will write are write earlier among the NVRAM, for example can be accumulated to the 4K byte again property write, need not a byte of byte write.Indicator light first and second are used to refer to the 5V power supply respectively and whether the 3.3V power supply is connected, whether the 3rd indication CPU operation normal, the 4th, 5,6 be used to refer to MVBC operating state, the 7th and the 8th and keep for client applications to use.CPLD is mainly used in the control signal of CPU, address signal is carried out passing to MVBC after the sequential adjustment, to satisfy the sequential coupling of the two.Reset signal is transferred to CPU and CPLD simultaneously, mainly contain two kinds of situations and reset, the firstth, electrification reset, the secondth, watchdog reset, promptly when CPU or CPLD are undesired outer watchdog with regard to can not get periodically instruction resetting of causing.

Be illustrated in figure 3 as the software configuration composition frame chart of a kind of execution mode of the utility model, aspect software configuration, a kind of execution mode adopts the software configuration of stratification, the software hierarchy chart is as follows, adopt VXWORKS operating system, realized the real-time communication agreement and the various communication task of MVB train communication network, adopted the ISAGRAF software that meets international standard IEC61131 to be used for the exploitation of application program on the upper strata, and various data transaction firmwares are provided.Wherein the hardware physical layer is above is responsible for starting CPU minimum system, serial ports, Ethernet interface for system software architecture: BSP; The VxWORKS real time operating system is responsible for carrying out task scheduling, file system management etc. and is used irrelevant management with particular customer; (enhanced time processor writes a Chinese character in simplified form for CAN communication, 485/422T communication, ethernet communication, RS232 communication, ETPU, it is the integrated programmable I/O controller that has self kernel and memory cell among the Freescale coldfire series number of C PU, it is independent of host CPU nuclear, can realize complicated and controlled function time correlation such as IO processing, serial communication, motor control etc., like this, host CPU is endorsed to free other incident of handling) control waits serve as the task program of carrying out the particular customer application; MVB link layer, RTP, NM three are an integral body, are responsible for realizing the MVB communication of IEC61375 defined; The ISAGRAF virtual machine is used for the explanation of ISAGRAF user program to be carried out; The ISAGRAF layer is the graphical interfaces that user program directly contacts with the user, for the user provides graphical secondary development function.

Be illustrated in figure 4 as the external structure schematic diagram of a kind of execution mode of the utility model, form by housing and a front panel when using, the plug of core bus interface is not installed on the PCB as module.Wherein the mark implication of front panel is respectively: 1, two MVB communication DB9 plugs, one-in-and-one-out; 2, other on-the-spot plug that uses, RS485/422, RS232, CAN bus, ETPU control input/output function etc.; 3, power connection; 4, status indicator lamp; 5, RS232 serial ports; 6, Industrial Ethernet joint.Be fixed together by long screw between the module housing, circuit board is fixed on the housing by short screw.

The described equipment of the utility model is a kind of MVB four kind equipments, MVB four kind equipments be a kind of can the implementation procedure data, message data etc., equipment with complete MVB master function, wherein process data is the data of the cycle transmitting-receiving of stipulating among the IEC61375-1, be mainly used to transmit the parameter that some real-times are had relatively high expectations, for example the parameter that requires of integral curve etc.Message data is the sporadic data of stipulating among the IEC61375-1, can transmit some parameters that larger capacity, real-time require to be lower than process data, for example the environmental parameter of fault etc.The utility model can be realized the exchanges data of MVB bus and RS232,485/422, CAN, Ethernet, AMS parallel bus, use the CPU of MCF5235 to carry out communication protocol stack and data exchanging function, utilize the SDRAM of its ETPU unit execution Real Time Control Function, MT48LC8M16A2 as the FLASH of the running space of program, SST39VF6401B memory space as program, adopt the CPLD of EPM1270 to realize control logic and sequential interface and 4 UART controllers, adopt the MVBC01 special chip to finish the MVB Communication Control; The unify software configuration of stratification of VXWORKS real-time oss is adopted in the realization of functions of modules.

The described equipment of the utility model both can add that shell became an independently product module, also can be used as a plug-in unit of AMS cabinet product, had good installation adaptability; On this product, realize the exchanges data of MVB and multiple interfaces in addition, had Interface Matching ability more widely; In addition, have two kernels owing to the CPU of this programme employing is actual, can when realizing bus communication, data transaction, well finish Real Time Control Function, have more integrated functionality, can reduce peripheral module, reduce cost.

Though described execution mode of the present utility model in conjunction with the accompanying drawings, those of ordinary skill in the art can make various distortion or modification within the scope of the appended claims.Chip that technical solutions of the utility model adopted and components and parts include but not limited to the central cited concrete model of embodiment.

Claims (10)

1. device of realizing the interconnection of MVB bus and third party device, comprise CPU (1), MVB module (3), power module (15) and CPU minimum system, CPU (1) links to each other with MVB module (3), power module (15) links to each other with MVB module (3) with CPU (1), it is characterized in that: this device also comprises at least two kinds of bus communication interfaces, described bus communication interface links to each other with CPU (1), carries out exchanges data by CPU (1) with MVB module (3).

2. a kind of device of realizing MVB bus and third party device interconnection according to claim 1, it is characterized in that: described device comprises CPLD (2), CPLD (2) links to each other with MVB module (3) with CPU (1) respectively, and CPLD (2) carries out control signal and the address signal of CPU (1) to pass to MVB module (3) after the sequential adjustment.

3. according to claim 1 or the described a kind of device of realizing MVB bus and third party device interconnection of claim 2, it is characterized in that: described device comprises the AMS bus interface, described AMS bus interface links to each other by CPLD (2) and then with CPU (1), finishes the communication of AMS parallel bus.

4. a kind of device of realizing MVB bus and third party device interconnection according to claim 3, it is characterized in that: described device comprises Ethernet interface circuit (7), described Ethernet interface circuit (7) links to each other with CPU (1).

5. a kind of device of realizing MVB bus and third party device interconnection according to claim 4, it is characterized in that: described device comprises RS232 interface circuit (8), described RS232 interface circuit (8) links to each other with CPU (1).

6. a kind of device of realizing MVB bus and third party device interconnection according to claim 5, it is characterized in that: described device comprises the RS485 interface circuit, described RS485 interface circuit links to each other with CPLD (2).

7. a kind of device of realizing MVB bus and third party device interconnection according to claim 6, it is characterized in that: described device comprises the CAN bus interface circuit, described CAN bus interface circuit links to each other with CPLD (2).

8. a kind of device of realizing MVB bus and third party device interconnection according to claim 7, it is characterized in that: described CPU (1) comprises two kernels, one of them kernel is carried out bus communication and data exchanging function, and another kernel is carried out Real Time Control Function.

9. a kind of device of realizing MVB bus and third party device interconnection according to claim 8, it is characterized in that: described device comprises SDRAM (4) and FLASH (5), SDRAM (4) links to each other with CPU (1), running space as program, FLASH (5) links to each other with MVB module (3) with CPU (1), CPLD (2) respectively, as the memory space of program.

10. a kind of device of realizing MVB bus and third party device interconnection according to claim 9, it is characterized in that: described MVB module (3) comprises MVB communication controller (31), MVB communication memory (32) and buffer (33), MVB communication controller (31) links to each other with buffer (33) all over news memory (32) with MVB respectively, and described buffer (33) comprises address buffer (331) and data buffer (332).

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