CN203084486U

CN203084486U - Vehicle-mounted comprehensive development platform based on FlexRay

Info

Publication number: CN203084486U
Application number: CN 201320098366
Authority: CN
Inventors: 黄运生; 吴国良; 段鑫; 孙雨; 张欣
Original assignee: HU NAN UNSEAL TIMES ELECTRONICS INFORMATION TECHNOLOGY CO LTD
Current assignee: HU NAN UNSEAL TIMES ELECTRONICS INFORMATION TECHNOLOGY CO LTD
Priority date: 2013-03-05
Filing date: 2013-03-05
Publication date: 2013-07-24
Anticipated expiration: 2023-03-05

Abstract

The utility model discloses a vehicle-mounted comprehensive development platform based on FlexRay. The vehicle-mounted comprehensive development platform comprises a power supply input circuit, a GPS (Global Positioning System), a GPRS (General Packet Radio Service) wireless data transmission circuit, a DSP (Digital Signal Processor) core controller and an FPGA (Field Programmable Gate Array) circuit, wherein the power supply input circuit is respectively connected with the DSP core controller and the FPGA circuit; the GPS and the GPRS wireless data transmission circuit are connected with the DSP core controller; the DSP core controller is connected with a Norflash memory, a serial port communication interface, a CAN (Controller Area Network) communication interface, a FlexRay communication interface, a USB (Universal Serial Bus) communication interface and an external interrupt input interface; the DSP core controller is connected with the FPGA circuit; and the FPGA circuit is connected with an H bridge output interface, an analog input circuit, a frequency acquisition circuit, a digital input circuit and a PWM (Pulse Width Modulation)/digital output circuit. The vehicle-mounted comprehensive development platform has the advantages of being simple in structure, low in cost, safe and reliable.

Description

Vehicle-mounted comprehensive exploitation platform based on FlexRay

Technical field

The utility model relates to a kind of vehicle-mounted comprehensive exploitation platform, particularly a kind of vehicle-mounted comprehensive exploitation platform based on FlexRay.

Background technology

The Flexray bus is based on line traffic control technology of new generation (X-by-Wire) and requires and the bus protocol of generation, and it is a kind of bus based on Time Triggered, but also supports the bus of Event triggered simultaneously; Has the binary channels redundancy structure; Have hardware motor synchronizing mechanism, meet the demand of real-time system; Total line use ratio height, a frame can transmit 254 byte datas; Transmission speed is up to 20Mbps.

The appearance of Flexray bus has effectively broken through the limitation of CAN network, is the development trend of bus in the future.

Progress along with science, the development of society, civil engineering motor vehicles and machines or military armored vehicle etc. require it function that possesses to become increasingly complex, and the otherness of vehicle is also very big, sometimes have to allow again the developer go exploitation for some little change, also exist some externally to maintain secrecy simultaneously, the content that can not allow the developer know, very long period or technology do not reach again and oneself is developed, complicated along with vehicle functions in addition, the CAN bus has shown its a lot of defectives, mainly shows as follows:

Node lacks synchronization mechanism in the network, and the scheduling of message can not be managed and predict, is not suitable for the needs of real-time system;

Network resource utilization is low, is difficult in the application that big data quantity exchange requires to get the mastery;

Fault tolerance can't satisfy line control system of future generation and use required.

The utility model content

In order to solve the problems of the technologies described above, the utility model provides that a kind of cost is low, the cycle short, the safe and reliable vehicle-mounted comprehensive exploitation platform based on FlexRay.

The technical scheme that the utility model addresses the above problem is: a kind of vehicle-mounted comprehensive exploitation platform based on FlexRay, it comprises DSP core controller and FPGA circuit, described DSP core controller is connected with Norflash storer, serial communication interface, CAN communication interface, FlexRay communication interface, usb communication interface and external interrupt input interface, the DSP core controller is connected with the FPGA circuit, and described FPGA circuit is connected with H bridge output interface, simulated measurement input circuit, frequency collection circuit, digital quantity input circuit and PWM/ digital quantity output circuit.

Above-mentioned vehicle-mounted comprehensive exploitation platform based on FlexRay also comprises power supply input circuit, and described power supply input circuit is connected with DSP core controller, FPGA circuit respectively.

Above-mentioned vehicle-mounted comprehensive exploitation platform based on FlexRay also comprises the GPS global positioning system GPRS wireless data transmission circuit of unifying, and described GPS GPS, GPRS wireless data transmission circuit are connected with the DSP core controller.

The beneficial effects of the utility model are:

1, the utlity model has the FlexRay bus functionality, make the realization line traffic control technology that the user can be real, when saving system's finished product, also the stability of the system of Jia Qianging has been reduced the construction cycle greatly, has guaranteed the advance of product;

2, but the utility model adopts the mode of secondary development, and user's various secure contents can be effectively guaranteed,

Can not produce the problem of divulging a secret;

3, the utlity model has GPS GPS, GPRS wireless communication module, can realize remote monitoring function.

Description of drawings

Fig. 1 is a structured flowchart of the present utility model.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described.

As shown in Figure 1, the utility model comprises power supply input circuit, the GPS GPS, GPRS wireless data transmission circuit, DSP core controller and FPGA circuit, described power supply input circuit respectively with the DSP core controller, the FPGA circuit connects, described GPS GPS, GPRS wireless data transmission circuit is connected with the DSP core controller, described DSP core controller is connected with the Norflash storer, serial communication interface, the CAN communication interface, the FlexRay communication interface, usb communication interface and external interrupt input interface, the DSP core controller is connected with the FPGA circuit, and described FPGA circuit is connected with H bridge output interface, simulated measurement input circuit, the frequency collection circuit, digital quantity input circuit and PWM/ digital quantity output circuit.

The main control chip of DSP core controller adopts TMS320F28335, this chip is 32 bit processors with floating-point operation function that TI releases, dominant frequency is up to 150MHz, instruction cycle 6.67ns, carrying out having done special improvement on the senior algorithms such as Fast Fourier Transform (FFT), performance has greatly improved.

The chip of FPGA circuit has adopted the EP2C5 of altera corp, and this chip is supported Nios II flush bonding processor, and the user can be as using single-chip microcomputer to develop with the C language.Digital quantity input circuit, simulated measurement input circuit (but software arrangements acquired signal type), frequency collection circuit, H bridge output interface, PWM/ digital quantity output circuit contents such as (but software arrangements) all thus FPGA realize, adopt the benefit of this mode to be, the processing speed height of FPGA, response speed is fast, precision is higher, and can reduce the CPU expense of DSP greatly, thereby make DSP can more go to pay close attention to the realization of algorithm

The capacity of Norflash storer is 2Mbit, and 16 bit data bus can realize the fast data read-write, and the user can be stored in the process deal with data in the Norflash storer, reads by other interfaces, thereby obtains process data.

The external interrupt interface: the user can dispose voluntarily and deal with urgent work response speed 100ns.

FlexRay high-speed communication passage: transfer rate reaches as high as 10Mbit/s, and every frame data byte can reach 254 bytes at most, and nearly 60 static time slots and 22 dynamic slot common users uses are arranged.The adding of FlexRay bus makes the user become possibility at a high speed reliable data communication.

Usb communication interface: USB can be configured to host mode, also can be configured to equipment mode, and top speed can reach 1.5Mbit/s.

The CAN communication interface: flank speed can reach 1Mbit/s, supports the CANopen agreement, convenient and third party CANopen equipment interconnection.

Serial communication interface: comprise the RS422/RS232/RS485 serial communication interface, the user realizes external serial communication by selecting wherein a kind of mode.

System has GPS global location module and GPRS wireless module, and the user is transferred to remote terminal by the GPRS wireless module then in the GPS information of obtaining equipment and other information, realizes the remote supervisory to equipment, also can long-range realization to the upgrading of equipment.

The digital quantity input circuit is divided equally 3 groups, is configured to low/high level input by 3 external high/low level of common port, and the photoelectricity coupling is isolated, and input about 10ms of response time imports the OFF electric current less than 100 μ A, input impedance 5.6K, and inside carries preventing jittering circuit.

But simulated measurement input circuit all software arrangements is any input type of five types of 5V voltage-types, 34.5V voltage-type, 20mA current mode, 1K Ω resistor-type, 100 Ω resistor-types, 12 of resolution, precision 1%, systemic circulation about 3.8ms switching time is isolated in the photoelectricity coupling.

The frequency collection circuit can be gathered the standard rectangular pulse of 0 ~ 10kHz, sine wave, pulsating wave, multiple signal such as triangular wave, input signal Vpp scope 4～50V, but one group of detected phase of two-way.

But PWM/ digital quantity output circuit software arrangements is the output of PWM/ digital quantity, all be with open circuit short circuit self diagnosis, output frequency can reach 2KHz, the photoelectricity coupling is isolated, the output response time, conducting resistance was less than 100m Ω less than 10ms, nominal load 1.5A, rated operational voltage 24V, maximum load 3A/ point and 10A/8 point.

H bridge output interface output frequency can reach 2KHz, and photoelectricity coupling is isolated, and the output response time is less than 10ms, and conducting resistance is less than 100m Ω, nominal load 1.5A, rated operational voltage 24V, maximum load 3A.

Claims

1. vehicle-mounted comprehensive exploitation platform based on FlexRay, it is characterized in that: comprise DSP core controller and FPGA circuit, described DSP core controller is connected with Norflash storer, serial communication interface, CAN communication interface, FlexRay communication interface, usb communication interface and external interrupt input interface, the DSP core controller is connected with the FPGA circuit, and described FPGA circuit is connected with H bridge output interface, simulated measurement input circuit, frequency collection circuit, digital quantity input circuit and PWM/ digital quantity output circuit.

2. the vehicle-mounted comprehensive exploitation platform based on FlexRay as claimed in claim 1 is characterized in that: also comprise power supply input circuit, described power supply input circuit is connected with DSP core controller, FPGA circuit respectively.

3. the vehicle-mounted comprehensive exploitation platform based on FlexRay as claimed in claim 1, it is characterized in that: also comprise the GPS global positioning system GPRS wireless data transmission circuit of unifying, described GPS GPS, GPRS wireless data transmission circuit are connected with the DSP core controller.