CN103414618A

CN103414618A - Multichannel FlexRay simulation system based on FlexRay buses

Info

Publication number: CN103414618A
Application number: CN2013103547260A
Authority: CN
Inventors: 莫莽; 刘矗; 罗峰
Original assignee: SHANGHAI GUTAI TECHNOLOGY Co Ltd
Current assignee: SHANGHAI GUTAI TECHNOLOGY Co Ltd
Priority date: 2013-08-14
Filing date: 2013-08-14
Publication date: 2013-11-27

Abstract

The invention relates to a multichannel FlexRay simulation system based on FlexRay buses. The multichannel FlexRay simulation system based on the FlexRay buses comprises a microcontroller, five FlexRay controllers and a USB module. The microcontroller is connected with the five FlexRay controllers, each FlexRay controller is connected to each FlexRay bus through a FlexRay transceiver, each FlexRay transceiver can be replaced through a pluggable mode, and data transmission is carried out between the microcontroller and a PC through a USB bus to achieve FlexRay message transceiving based on the PC. A simulation kernel operates on the PC and can simulate multiple FlexRay buses at the same time, a user can edit a code for a virtual FlexRay node on each virtual FlexRay bus, and thus each virtual FlexRay node can be communicated with a node of each real FlexRay bus connected with the virtual FlexRay node.

Description

A kind of analogue system of multichannel FlexRay based on the FlexRay bus

Technical field

The present invention relates to a kind of electronic equipment, particularly a kind of analogue system based on the FlexRay bus.

Background technology

FlexRay is a kind of confirmability of high speed for automobile, the bus system that possesses failure tolerant, FlexRay is by transmission of information in the time slot determining, and the failure tolerant on two passages and the transmission of redundant information, met the ever-increasing demand to the rate of information throughput especially failure tolerant and time determinability of new x-by-wire system thought.In the development process of FlexRay bus, in order to verify the function of certain node, usually need to be by bus, mutual other nodes that do not have of node are by computer virtual out therewith, and communicate by letter together with real network, thereby to the properties of the tested node of abundant checking, and the performance of whole network.

Common way is to use USB to turn the interface card of FlexRay, and FlexRay bus and computer are coupled together, and on host computer, by USB interface, controls slave computer sending and receiving message, carries out emulation with the node on bus.The problem that such analogue system exists is: a general system is only supported a FlexRay bus, supports bad to gateway and multichannel FlexRay bus.

Summary of the invention

Purpose of the present invention, in order to overcome multichannel FlexRay bus support issue and the scaling concern in FlexRay Bus simulator process, used the hardware of supporting five road FlexRay exactly, and the transceiver of each FlexRay interface can be replaced by plug simultaneously.

Concrete technical scheme provided by the invention is as follows:

A kind of analogue system of multichannel FlexRay based on the FlexRay bus, use microcontroller to be connected with five FlexRay controllers, each FlexRay controller is connected to respectively on the FlexRay bus, each FlexRay transceiver can be replaced by pluggable mode, thereby microcontroller carries out by usb bus and PC the transmitting-receiving that transfer of data realizes the FlexRay message, on PC, carry out emulation, make each virtual emulation FlexRay node of PC that factum be arranged.

A kind of analogue system of multichannel FlexRay based on the FlexRay bus, comprise hardware circuit, program of lower computer and host computer procedure.

A kind of analogue system of multichannel FlexRay based on the FlexRay bus, described hardware circuit is comprised of microcontroller, five FlexRay controllers, USB modules; Microcontroller is connected with five FlexRay controllers, and each FlexRay controller connects a FlexRay transceiver, and each FlexRay transceiver all is connected to one independently on the FlexRay bus.

A kind of analogue system of multichannel FlexRay based on the FlexRay bus, described FlexRay controller is after listening to FlexRay message or erroneous frame on bus, by the data feedback monitored to microcontroller, microcontroller reads in local message reception buffer zone by it, and the data in reception buffer zone are uploaded to PC by the USB module.

A kind of analogue system of multichannel FlexRay based on the FlexRay bus, after described USB module receives the order of host computer, be configured microcontroller, comprises configuration of FlexRay bus parameter etc.

A kind of analogue system of multichannel FlexRay based on the FlexRay bus, the dummy node in described host computer procedure artificial network, and by the USB driver, will need the message sent to pass to slave computer to send; By the USB driver, the message that slave computer receives is read and passes to dummy node simultaneously.

A kind of analogue system of multichannel FlexRay based on the FlexRay bus, its advantage be, 1, reasonable in design, and clear in structure, can virtual any node, and node and node are complete independence, are independent of each other; 2, can support simultaneously five FlexRay buses to carry out while emulation, the gateway support function.

The accompanying drawing explanation

Fig. 1 is total Organization Chart that in the invention process method, upper and lower computer connects

Fig. 2 is the actuating logic of hardware circuit in the invention process method

Fig. 3 is analogue system actuating logic in the invention process method

In Fig. 1, microcontroller (101), FlexRay controller (102), FlexRay transceiver block (103), FlexRay bus FlexRayH(104), FlexRay bus FlexRayL(105), USB module (106), PC (109), lower computer hardware circuit (110), USB line (111), power module (112), passage 1 sends indicator light (113), passage 1 codan lamp (114), the wrong indicator light of passage 1 (115), passage 2 sends indicator light (116), passage 2 codan lamps (117), the wrong indicator light of passage 2 (118), FlexRay transceiver daughter board (119), FlexRay transceiver daughter board (120), FlexRay transceiver daughter board (121)

In Fig. 2, FlexRay controller reception buffer zone (201), the FlexRay controller sends buffering area (202), local FlexRay sends buffering area (203), local FlexRay reception buffer zone (204), testing engine (205), message USB sends buffering area (208), message USB reception buffer zone (209), computer CPU (211), FlexRay Bus simulator application program (212)

In Fig. 3, USB driver (301), USB reception buffer zone (302), USB sends buffering area (303), FlexRay Bus simulator program (304)

Embodiment

In Fig. 1, lower computer hardware circuit (110) comprises microcontroller (101), USB module (106) and FlexRay transceiver block (103), lower computer hardware circuit (110) is connected to PC (109) by USB cable (111), simultaneously by FlexRay bus FlexRayH(104) and FlexRayL(105) be connected to other nodes (112) on bus.

Microcontroller (101) connects at least one FlexRay controller (102), the TX pin of each FlexRay controller and RX pin are connected respectively TX pin and the RX pin of FlexRay transceiver block (103), the FlexRayH of FlexRay transceiver is connected to FlexRay bus FlexRayH(104), the FlexRayL of FlexRay transceiver is connected to the FlexRayL(105 of FlexRay bus).

Microcontroller (101), inner integrated CPU and internal memory, be connected with one or more independently FlexRay controllers; Or inner integrated one or more FlexRay controllers; What Fig. 1 showed is the situation of the inner integrated FlexRay controller of microcontroller (102).

FlexRay controller (102), protocol conversion chip as the FlexRay bus, be responsible for the information such as the message on the FlexRay bus and erroneous frame are fed back to microcontroller, each FlexRay controller has TX and the RX pin be connected with the FlexRay transceiver.

In Fig. 2, lower computer hardware circuit (110) is connected to PC (109) by USB cable (111), PC (109) comprises at least one central processing unit (211), PC (109) internal operation automated server application program (212) and at least one Automation Client application program (213).

Lower computer hardware circuit (110) is by connecting FlexRay bus FlexRayH(104) and FlexRay bus FlexRayL(105) communicate with other nodes.

The flow process that lower computer hardware circuit (110) receives from the message of FlexRay bus is, after the transceiver that its FlexRay controller (102) connects by FlexRay transceiver block (103) listens to the FlexRay message, by its buffer memory to inner FlexRay reception buffer zone (201), and notice microcontroller (101), microcontroller (101) is saved in message USB reception buffer zone (209) by the message that calls receiver function (204) and will receive, by USB module (106) by these data upload to PC (109).

The transmission flow of lower computer hardware circuit (110) is, slave computer microcontroller (101) sends buffering area (208) and reads the message data that will send from USB module (106) from message USB, by sending function (203), needs are sent to message on bus put into the FlexRay of FlexRay controller (102) and send buffering area again, via FlexRay controller (102), send to the FlexRayH(104 of FlexRay bus by the transceiver of FlexRay transceiver block (103) connection) and FlexRayL(105) on.

In Fig. 3, the FlexRay Bus simulator program (304) of host computer internal operation is connected to USB cable (111) by USB driver (301), thereby and sets up usb communication between lower computer hardware circuit (110).

Simulation flow in Fig. 3 is, the virtual five FlexRay buses of FlexRay Bus simulator program (304), and fictionalize the node that needs emulation on each virtual bus, USB transmission buffering area (303) is all put in sending request of the node of emulation, and be issued in lower computer hardware circuit (110) by USB driver (301), which by the virtual FlexRay network at simulation node place and the objective network of simulation node transmission, determine to send on the true FlexRay bus of root of slave computer; After when USB driver (301), having received the FlexRay message data of monitoring from slave computer, these data are deposited in USB reception buffer zone (302), and FlexRay Bus simulator program (304) reads these data and sends it to each simulation node.

Claims

1. analogue system of the multichannel FlexRay based on the FlexRay bus, it is by microcontroller, a plurality of FlexRay controllers and USB module form, it is characterized in that, microcontroller is connected with a plurality of FlexRay controllers, each FlexRay controller is connected to the FlexRay bus by the FlexRay transceiver respectively, each FlexRay transceiver can be replaced by pluggable mode, thereby microcontroller carries out transfer of data by usb bus and PC realizes the FlexRay packet sending and receiving based on PC, on PC, move simulation kernel, simulation kernel is virtual many FlexRay buses simultaneously, the user can write code for the emulation FlexRay node on every virtual FlexRay bus, thereby make each virtual FlexRay node can with coupled real FlexRay bus on node communicate.

2. a kind of analogue system of multichannel FlexRay based on the FlexRay bus according to claim 1, is characterized in that, system comprises hardware circuit, program of lower computer and host computer procedure.

3. a kind of analogue system of multichannel FlexRay based on the FlexRay bus according to claim 2, is characterized in that, described hardware circuit is comprised of microcontroller, a plurality of FlexRay controller, USB module; Microcontroller is connected with a plurality of FlexRay controllers, and each FlexRay controller connects a FlexRay transceiver, and each FlexRay transceiver all is connected to one independently on the FlexRay bus.

4. a kind of analogue system of multichannel FlexRay based on the FlexRay bus according to claim 3, it is characterized in that, described FlexRay controller is after listening to FlexRay message or erroneous frame on bus, by the data feedback monitored to microcontroller, microcontroller reads in local message reception buffer zone by it, and the data in reception buffer zone are uploaded to PC by the USB module.

5. a kind of analogue system of multichannel FlexRay based on the FlexRay bus according to claim 4, is characterized in that, after described USB module receives the order of host computer, microcontroller is configured, and comprises configuration of FlexRay bus parameter etc.

6. a kind of analogue system of multichannel FlexRay based on the FlexRay bus according to claim 2, the dummy node in described host computer procedure artificial network, and by the USB driver, will need the message sent to pass to slave computer to send; By the USB driver, the message that slave computer receives is read and passes to dummy node simultaneously.

7. a kind of analogue system of multichannel FlexRay based on the FlexRay bus according to claim 6, it is characterized in that, described each emulation FlexRay node has relevant code to write interface, by compiling, obtains executable code, and calls execution via simulation engine.

8. a kind of analogue system of multichannel FlexRay based on the FlexRay bus according to claim 7, it is characterized in that, described each emulation FlexRay node can receive the bus message of uploading by USB interface, logic by the corresponding executable code of each node is to determine the reaction of emulation FlexRay node for the FlexRay event on bus, the message that needs simulation node to send will be transferred to USB interface and be issued to the lower computer hardware circuit by simulation kernel, and be dealt on bus via the FlexRay module of slave computer.