EP2122924A2 - Circuiterie pour un bus de données de véhicule à moteur - Google Patents

Circuiterie pour un bus de données de véhicule à moteur

Info

Publication number
EP2122924A2
EP2122924A2 EP08701489A EP08701489A EP2122924A2 EP 2122924 A2 EP2122924 A2 EP 2122924A2 EP 08701489 A EP08701489 A EP 08701489A EP 08701489 A EP08701489 A EP 08701489A EP 2122924 A2 EP2122924 A2 EP 2122924A2
Authority
EP
European Patent Office
Prior art keywords
bus
circuit arrangement
data
circuit
operating mode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08701489A
Other languages
German (de)
English (en)
Inventor
Tobias Beckmann
Roman BÜCHLER
Wolfgang Fey
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Teves AG and Co OHG
Original Assignee
Continental Teves AG and Co OHG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Continental Teves AG and Co OHG filed Critical Continental Teves AG and Co OHG
Publication of EP2122924A2 publication Critical patent/EP2122924A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/40006—Architecture of a communication node
    • H04L12/40032—Details regarding a bus interface enhancer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/40169—Flexible bus arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L2012/40208—Bus networks characterized by the use of a particular bus standard
    • H04L2012/40215—Controller Area Network CAN
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L2012/40208—Bus networks characterized by the use of a particular bus standard
    • H04L2012/40241—Flexray
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L2012/40267—Bus for use in transportation systems
    • H04L2012/40273—Bus for use in transportation systems the transportation system being a vehicle

Definitions

  • the invention relates to a transmitting and / or receiving circuit arrangement for the physical realization of a motor vehicle data bus system according to the preamble of claim 1 and their use in a motor vehicle control unit.
  • FlexRay (R) is a bus standard for electronic control units in motor vehicles, which should enable particularly fast, real-time capable and fault-tolerant transmission of data. FlexRay (R) is considered by many leading vehicle manufacturers and their suppliers as a future standard, which should replace, at least in some areas, the CanBus (R) data transmission technology used in virtually all motor vehicles.
  • the CanBus (R) technology or the network formed thereby is used for data exchange between the electronic control units, sensors and actuators that are increasingly present in the vehicle.
  • FlexRay (R) allows improved and faster data transfer compared to CAN, essentially by using fixed time windows and fault tolerant and redundant transmission on two channels.
  • a prior art electronic FlexRay (R) driver circuit consists essentially of two high-side and two low-side driver stages which have two different dominant, ie actively driven states (inverted differential voltage) on the Can generate bus. Depending on the state "0" or "1", a high-side and a low-side driver are connected in series; the electrical connection between the drivers form the connections to the bus lines BP and BM.
  • a CAN driver is known to consist of only one high-side and one low-side driver stage, because only a dominant (actively driven) state has to be generated.
  • the output of the high-side driver is connected to the CAN-H bus line, the output of the low-side driver to the CAN-L bus line.
  • the object of the present invention is to provide a transmitting and / or receiving circuit for the physical realization of a motor vehicle data bus, which is flexibly configurable and simple.
  • Control units often have to provide both a CAN bus connection and also a FlexRay (R) connection in order to be universally applicable.
  • a known FlexRay transceiver is usually larger and therefore more expensive than a CAN transceiver.
  • the invention includes the idea that the partial combination of circuit elements of the two conventional CAN transceivers makes it possible to use the transceiver formed for a plurality of bus types, that is to say in particular CAN and FlexRay. In addition, according to one embodiment, it is possible to switch between a FlexRay connection and two CAN connections.
  • the invention relates to a transmission and / or a receiving circuit arrangement for the physical realization of a motor vehicle data bus system.
  • This includes terminals for connecting a bus line via which bus data can be transmitted.
  • the terminals are preferably connected to a CanBus or a FlexRay bus.
  • the circuit arrangement comprises output terminals to, for example, a digital processing unit is connected, which may be, for example, a microcontroller for processing the bus data.
  • Logical levels are applied to the output terminals as a function of the bus data to be transmitted or received.
  • the circuit arrangement has in particular one or more control lines with which the behavior of the circuit arrangement can be configured.
  • the circuit has multiple modes of operation with different physical implementations of one or more logic states (eg, "0" or "1").
  • logic states eg, "0" or "1"
  • physical realization is meant the conversion of the binary states into electrical signals.
  • circuit elements used in the circuit in each operating mode are included in the circuit.
  • These common circuit elements which are for example drivers and / or comparators, can thus also be used in a first operating mode for a further, in particular second operating mode.
  • switching and / or structuring means are still present in the circuit arrangement according to the invention.
  • the switching means for example, a mode switching and / or configuration in dependence on the signals on the / the control line (s) take place.
  • the control lines are preferably connected to at least one corresponding control module.
  • a mode switching and / or configuration can also be carried out with structuring means.
  • Structural means are different external circuits of the inputs and / or outputs of the circuit referred to or wire bridges o- or the like, for example, by the user of the circuit can be subsequently soldered to the circuit.
  • a structuring means is a control input or a bus input (for example SPI bus) of the circuit with which the circuit can be switched to different operating modes.
  • a memory for example flip-flop, EEPROM
  • EEPROM electrically erasable programmable read-only memory
  • the invention preferably describes a universal transceiver which, depending on the operating mode, allows FlexRay (R) and / or CanBus (R) data communication.
  • the driver or receiver circuit according to the invention is particularly suitable for use as part of a user-specific circuit (ASIC), which is preferred, because usually they are manufactured in large quantities, so that component savings for economic reasons are beneficial.
  • ASIC user-specific circuit
  • FIG. 1 is a block diagram with a driver node for operation in a FlexRay (R) network
  • FIG. 2 shows several connection examples of the terminals of a function block to a CAN or Flexray (R) bus
  • FIG. 3 shows a driver module with a function block according to FIG. 2, FIG.
  • FIG. 4 shows a receiver module with two operating modes (CAN and FlexRay (R)),
  • FIG. 5 shows a further example of a receiver module which, like the receiver module in FIG. 4, can be used both for FlexRay (R) and for CAN, and
  • FIG. 6 shows a conventional, commercially available FlexRay (R) standard component (FlexRay (R) transceiver) which is used as a CAN component by special activation / wiring.
  • R FlexRay
  • R FlexRay
  • the drivers 1... 4 form a network node, which is connected to data bus 7 via terminals 5 and 6.
  • Bus 7 comprises the bus lines 8 (BP) and 9 (BM) of a FlexRay (R) network.
  • BP bus lines 8
  • BM bus lines 8
  • BM FlexRay
  • the drivers 1 ... 4 can be controlled by an unillustrated control electronics.
  • a defined current flow from node 5 to node 6 can be set.
  • the current direction determines the binary state "1" or "0" for a data bit to be transmitted over the bus.
  • Fig. 2a shows the driver node as a function block 12 (chip or module) generally with 4 bus terminals 13 ... 16.
  • Panel b) shows the wiring of the terminals 13 ... 16 of the function block 12 in the case of use as a FlexRay (R) - driver.
  • Panel c) shows the wiring of the terminals 13 ... 16 of the function block 12 in the case of use as a CAN driver, advantageously two CAN drivers for bus "CANl" and "CAN2" can be realized.
  • the aforementioned drivers are composed of two individual high-side 1, 2 and two low-side driver stages 3, 4, in which the terminals 13 ... 16 of all four stages are led out individually.
  • external wiring can now optionally a FlexRay driver by shorting the pins 13 and 16 and the pins 14 and 15, the bus termination between lines 8 and 9 is located, or two CAN driver can be represented by connecting the termination for bus "CANl" between pin 14 and 15 as well as a termination for bus "CAN2" between pins 13 and 16.
  • a coupling module it is likewise preferably possible to automatically carry out the assignment of the external connections 13 to 16 by a coupling module, wherein the coupling module is then in particular part of the circuit arrangement according to the invention.
  • the driver module 12 in FIG. 3 additionally comprises, in addition to the driver stages according to FIG. 2, a driver control block 20 with which the control signals 11 for the driver stages 1... 4 can be generated.
  • module 12 On the side facing the microcontroller, not shown (the receiver is considered separately below), module 12 has two input terminals 17 and 18, which can be configured differently via control line 19.
  • the lines 17 to 19 are connected to control block 20. Via line 19, two modes of operation of the control block 20 can be selected.
  • line 17 has the functionality of the terminal "TX" of a conventional CAN driver for the first CanBus "CANl” (see Fig. 2).
  • line 18 is associated with port “TX” for the second CAN bus "CAN2" (see FIG. 2).
  • Line 17 is assigned the functionality of the standardized FlexRay (R) connection "FR”.
  • Line 18 is then assigned the likewise standardized connection "FR-TXEN”.
  • Control signal 19 for setting the modes can be provided, for example, by means of an SPI bus, wherein a memory bit is set in the control block depending on the operating mode.
  • FIG. 4 shows a universally usable receiver module 21 which, in a manner similar to the driver (transmitter) in FIG. 3, may be programmed by a receiver control block 20 'to provide two modes of operation.
  • Receiver 21 (receiver) comprises a plurality of comparators 22, 25 and 25 ', which each form logical signals from differential voltages (eg voltage U at terminals 13 and 14).
  • differential voltages eg voltage U at terminals 13 and 14
  • terminals 13 and 16 as well as 14 and 15 are short-circuited (bridges 35 and 36).
  • the differential voltages then result from the levels applied to the bus lines 8 (BP) and 9 (BM).
  • BP bus lines 8
  • BM bus lines 8
  • the comparators 22, 25, and 25 ' the difference signal can still be compared with a reference voltage.
  • a CAN receiver module essentially consists of a comparator (see also comparator 25, which is supplied with the differential voltage applied to terminals 14 (CANlH) and 15 (CANlL).) If the differential voltage is above the upper switching threshold, the receiver outputs a signal "0 If the differential voltage is below the lower threshold, the receiver outputs a "1" (recessive) signal, output for the first CanBus via line 23 and for the second CanBus via line 24.
  • the receiver 21 in Fig. 4 comprises for each CAN input a comparator 25 ("CANl") and 25 '("CAN2"). These are connected to the input terminals "BP / CAN1H", "BM / CAN1L” or "CAN2H, CAN2L".
  • CANl comparator
  • BM / CAN1L BM / CAN1L
  • CAN2H CAN2L
  • external wiring can now optionally be used in the first drive mode, a FlexRay receiver or in the second operating mode, two CAN receivers can be realized.
  • the digital output signals 26 ... 29 of the comparators 22, 25 and 25 ' are forwarded via control block 20' to the terminals 23, 24 for corresponding connections to the microcontroller.
  • the signal RXl is interpreted as RX and the signal RX2 as RxEN.
  • RXl is interpreted as RX of the CANl and RX2 as RX of the CAN2.
  • Fig. 5 shows another circuit example of a universal receiver 21 'with two modes of operation.
  • the decoding of the bus signals by means of two comparators 22 and 22 ', whose inputs are electrically connected to bus terminals 13 ... 16. Again, in the operating mode "FlexRay (R)" an external wiring of the terminals 13 ... 16 make.
  • the first input 37 of the comparator 22 is supplied to a changeover switch 38, so that this comparator input 37 can be connected to terminal 13 or to terminal 14, depending on the operating mode.
  • Control line 39 which leads from decoder 20 '' to switch 38, selects the position of the switch 38 depending on the operating mode.
  • digital outputs 23 and 24 are used to generate either FlexRay (R) data (mo- dus 1: outputs “FR” and “FR-RXEN”) or CAN data (mode 2: outputs “CANl” and “CAN2”) are output, whereby two CAN connections are available in the "CAN" operating mode.
  • R FlexRay
  • mode 2 outputs "CANl” and "CAN2”
  • the conventional, commercially available FlexRay (R) transmission / reception component 30 (FlexRay (R) transceiver) shown in FIG. 6 is used merely by adapting the activation / wiring as a CAN component. This is surprisingly possible without excessive losses in terms of the signal quality, in which the bus lines "CAN-H” and “CAN-L” of a CAN network are connected to the FlexRay (R) connections 31 and 32.
  • output "RXEN" of the FlexRay (R) transceiver 30 is electrically connected to input “RX” of the CAN controller 33 and input TXEN of the FlexRay (R) transceiver 30 to output "RX” of the CAN controller 33.
  • the potential at input "TX” of the FlexRay transceiver 30 is set to a positive voltage V + .
  • the potential at input "RX" of the FlexRay (R) transceiver 30 is connected to a reference potential.
  • This wiring of the FlexRay transceiver 30 makes it possible to simulate the functionality of a CanBus in the simplest way. Due to the multiple use of the circuit provided in itself for FlexRay, a significant saving effect can be achieved in a control unit which must be provided for both bus standards.
  • the invention therefore also relates to the use of a FlexRay (R) receiver as CanBus receiver or a FlexRay (R) transmitter as CanBus transmitter or a FlexRay (R) transceiver as CanBus transceiver.
  • the FlexRay (R) module used for this purpose is preferably used unchanged in comparison to standard FlexRay (R) modules, whereby only the external connection of the terminals compared to the circuit provided in the FlexRay (R) standard is used. changes.
  • a modular combined transmitter / receiver circuit comprises a combination of the transmitting circuit 12 shown in FIG. 3 together with the receiving circuit shown in FIG. 4, which essentially consists of the comparators 22, 25 and 25 'exists.
  • the transmitting and receiving circuit elements are combined in particular to form a common module or electronic component.
  • An alternative embodiment of such a combined transmit / receive circuit is achieved by combining the transmitter in FIG. 3 with the receiver circuit shown in FIG.
  • the control logic of the blocks 20 and 20 'or 20' ' is expediently combined to form a common block.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Dc Digital Transmission (AREA)
  • Logic Circuits (AREA)
  • Information Transfer Systems (AREA)

Abstract

L'invention concerne une circuiterie d'émission et/ou de réception (12, 21, 21´) permettant la réalisation physique d'un système de bus de données de véhicule à moteur ainsi que l'utilisation de ladite circuiterie. Selon l'invention, le circuit possède plusieurs modes de fonctionnement configurables, qui représentent une réalisation physique différente d'un ou de plusieurs états logiques, et comprend des éléments électroniques de génération et/ou réception de bits (1, 2, 3, 4, 22, 22´25, 25´), utilisés dans chaque mode de fonctionnement. De plus, des éléments de commutation et/ou de structure (11, 13, 14, 15, 16, 19, 19´20, 20´, 20´´) permettent de commuter ladite circuiterie entre lesdits modes de fonctionnement et/ou de la faire fonctionner selon différents modes de fonctionnement.
EP08701489A 2007-01-17 2008-01-15 Circuiterie pour un bus de données de véhicule à moteur Withdrawn EP2122924A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102007003326 2007-01-17
PCT/EP2008/050379 WO2008087131A2 (fr) 2007-01-17 2008-01-15 Circuiterie pour un bus de données de véhicule à moteur
DE102008004551A DE102008004551A1 (de) 2007-01-17 2008-01-15 Schaltungsanordnung für einen Kraftfahrzeugdatenbus

Publications (1)

Publication Number Publication Date
EP2122924A2 true EP2122924A2 (fr) 2009-11-25

Family

ID=39531054

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08701489A Withdrawn EP2122924A2 (fr) 2007-01-17 2008-01-15 Circuiterie pour un bus de données de véhicule à moteur

Country Status (7)

Country Link
US (1) US20110022766A1 (fr)
EP (1) EP2122924A2 (fr)
JP (1) JP2010516535A (fr)
KR (1) KR20090110309A (fr)
CN (1) CN101584154A (fr)
DE (1) DE102008004551A1 (fr)
WO (1) WO2008087131A2 (fr)

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KR101480389B1 (ko) * 2013-05-28 2015-01-09 주식회사 와이즈오토모티브 Ｃａｎ 액티브 스위치
US10452504B2 (en) 2013-10-02 2019-10-22 Nxp B.V. Controller area network (CAN) device and method for emulating classic CAN error management
US9330045B2 (en) 2013-10-02 2016-05-03 Nxp B.V. Controller area network (CAN) device and method for controlling CAN traffic
EP2940935B1 (fr) * 2014-04-30 2017-08-02 Nxp B.V. Dispositif de réseau de zone de contrôleur (CAN) et procédé de commande de trafic CAN
CN106573583B (zh) * 2014-08-22 2019-02-22 三菱电机株式会社 车载电子控制装置
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FR3038807B1 (fr) * 2015-07-09 2017-07-21 Continental Automotive France Dispositif d'emetteur-recepteur apte a etre connecte sur un reseau de communication par bus de type can ou flexray
JP6528845B2 (ja) * 2015-07-31 2019-06-12 株式会社村田製作所 アンテナ整合回路、アンテナ回路、フロントエンド回路および通信装置
US10361934B2 (en) * 2015-09-28 2019-07-23 Nxp B.V. Controller area network (CAN) device and method for controlling CAN traffic
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Also Published As

Publication number Publication date
WO2008087131A3 (fr) 2008-10-02
DE102008004551A1 (de) 2008-07-24
US20110022766A1 (en) 2011-01-27
WO2008087131A2 (fr) 2008-07-24
JP2010516535A (ja) 2010-05-20
KR20090110309A (ko) 2009-10-21
CN101584154A (zh) 2009-11-18

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