WO2015096953A1 - Procédé d'attribution d'identifiants d'appareil dans un système de bus, appareil maître, appareil esclave et système de bus - Google Patents

Procédé d'attribution d'identifiants d'appareil dans un système de bus, appareil maître, appareil esclave et système de bus Download PDF

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Publication number
WO2015096953A1
WO2015096953A1 PCT/EP2014/075930 EP2014075930W WO2015096953A1 WO 2015096953 A1 WO2015096953 A1 WO 2015096953A1 EP 2014075930 W EP2014075930 W EP 2014075930W WO 2015096953 A1 WO2015096953 A1 WO 2015096953A1
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WO
WIPO (PCT)
Prior art keywords
slave
bus
bus interface
transceiver
device identifier
Prior art date
Application number
PCT/EP2014/075930
Other languages
German (de)
English (en)
Inventor
Heiko Boeck
Thomas WANDEL
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2015096953A1 publication Critical patent/WO2015096953A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/50—Address allocation
    • H04L61/5038—Address allocation for local use, e.g. in LAN or USB networks, or in a 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
    • H04L2012/40215—Controller Area Network CAN
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0803—Configuration setting
    • H04L41/0806—Configuration setting for initial configuration or provisioning, e.g. plug-and-play

Definitions

  • the present invention relates to a method for awarding
  • Device identifiers in a bus system with one master device and at least two slave devices. Furthermore, the present invention relates to a master device, a slave device and a bus system.
  • Bus systems are used today in a variety of different applications.
  • bus systems can be used in automation technology to couple the different sensors, actuators and controllers of an automation system in a data-communicative connection with each other.
  • Bus systems may, however, be e.g. also be used in vehicles to couple the individual control units in a vehicle with each other.
  • an ESP control device of a vehicle can be coupled to a central gateway of a vehicle via a CAN bus or a FlexRay bus.
  • the bus subscribers In order to communicate on a data bus of a bus system, the bus subscribers must be assigned unique device identifiers or identifiers by which data packets or messages on the data bus can be assigned to a corresponding sender.
  • Device identifiers are set to the individual bus participants by means of a PIN code, in which by means of simple switch or dip switch, a binary code representing the device identifier is set.
  • Dip switches are usually arranged directly on the board of the respective bus device and require installation space. Furthermore, the dip switches are difficult to reach or adjust due to their small size.
  • the device identifiers can already be specified during the production of a bus participant in hardware or in the firmware of the bus participant. However, this method is not very flexible and can not be used if several identical bus subscribers in a data bus are to be coupled together.
  • the present invention discloses a method having the features of claim 1, a master device having the features of claim 7, a slave device having the features of claim 9, and a bus system having the features of claim 11.
  • a method for assigning device identifiers in a bus system having a master device and at least two slave devices comprising the steps of transmitting a device identifier not assigned in the bus system by the master device to a slave device coupled to the master device, Check by the slave device to which the device identifier has been transmitted, whether the slave device is already on
  • Device identifier has been assigned, storing the received device identifier in the slave device to which the device identifier was transmitted as the assigned device identifier if the device has not yet been assigned to the slave device, transmitting the device identifier to another slave device through the device identifier Slave devices to which the device identifier has been transmitted when a device identifier has already been assigned to the slave device to which the device identifier was transmitted, the step of overruling being repeated by all slave devices to which a device identifier has already been assigned.
  • a master device for a bus system with a master bus interface, which is designed to couple the master device via the bus system directly to a slave device, and with a control device, which is designed for commissioning the bus system via the master bus interface only send messages, each having a not assigned in the bus system device identifier until each slave device in the bus system, a device identifier has been assigned. It is also provided:
  • a slave device for a bus system having a first slave bus interface and a second slave bus interface, wherein after the start of the slave device, the second slave bus interface is deactivated, with a computing device which is adapted to the second slave Enable bus interface after the computing device has received a device identifier via the first slave bus interface.
  • the finding underlying the present invention consists in the fact that it is difficult to operate a plurality of identical bus subscribers on a bus system if they are assigned a device identifier with one of the known methods.
  • the idea underlying the present invention is now to take this knowledge into account and provide a possibility to operate a multiplicity of identical slave devices on a bus system.
  • the present invention provides that the individual slave devices only when switching on or booting the bus system, a device identifier is assigned. Since the individual devices can not be individually addressed until the assignment of a device identifier, the method according to the invention uses the position of the individual slave devices in a series connection of the plurality of slave devices in the bus system.
  • a master device transmits a not yet assigned device identifier to one of the slave devices, which is coupled to the master device.
  • the slave device checks whether a device identifier has already been assigned to it. If this is not the case, the slave device stores the device identifier received from the master device.
  • the slave device transmits the device identifier to another slave device. This slave device then performs the same check as the first slave device.
  • this slave device If a device identifier has already been assigned to this slave device, this slave device also transmits the device identifier to another slave device.
  • the device identifier is used by all slave devices that already have one
  • the present method thereby makes it possible to provide a plurality of similar slave devices in a bus system with a device identifier identifying the position of the individual slave device.
  • the slave devices receive the device identifier via a first slave bus interface and transmit the device identifier to another slave device via a second slave bus interface. This makes it very easy to couple the individual slave devices in series. In a further embodiment is in slave devices, which still no
  • Device identifier the second slave bus interface disabled. This stops the transmission of a device identifier on a slave device that has not yet been assigned its own device identifier. This prevents two slave devices from assigning the same device identifier as their assigned one
  • Device identifier in a slave device the respective slave device its corresponding second slave bus interface. This makes it possible, after assigning a device identifier to a slave device, to forward further device identifiers through this slave device to other slave devices. In a further embodiment, the method steps are repeated until a device identifier has been assigned to all slave devices. This allows a bus system to be put into operation very easily.
  • the method is used in a CAN bus system or a CAN FD bus system and the slave devices each have a first CAN transceiver or a first CANFD transceiver for the first slave bus interface and a second CAN transceiver or a second CANFD transceiver for the second slave bus interface.
  • the present method enables the present method to be used in a variety of applications, e.g. in the automotive sector, use.
  • the first CAN transceiver and the second CAN transceiver in the respective slave device are coupled to one another such that data signals which are received at one of the CAN transceivers, to a computing device of the slave device and to the other CAN transceiver are forwarded to the output, wherein data signals are forwarded from the computing device of the slave device to the first CAN transceiver and to the second CAN transceiver for output.
  • the method comprises the step of arbitrating the access to the CAN data lines of the CAN bus system.
  • the data lines between the computing device and the first CAN transceiver and the second CAN transceiver are set to a positive reference voltage when no communication takes place on the data lines.
  • the arbitration is no longer carried out at the level of the bus lines but in each individual slave device.
  • a pull-up resistor can be used for this purpose.
  • bus system can also be referred to as CANFD, that is to say as "CAN
  • re-training of the device identifiers may be commanded by the master device 2 to all slave devices by transmitting a special data signal over the bus interface After receiving the special data signal, all slave devices will be brought In the initial state, the method according to the invention has to be carried out again for each slave device In the initial state, the forwarding of the device identifiers is deactivated by the computing device of the slave devices and the slave devices are ready new
  • Fig. 2 is a block diagram of one embodiment of a master device according to the invention.
  • FIG. 3 is a block diagram of an embodiment of a slave device according to the invention.
  • FIG. 4 shows a block diagram of an embodiment of a bus system according to the invention
  • Fig. 5 is a block diagram of another embodiment of an inventive
  • FIG. 1 shows a flow chart of an embodiment of a method according to the invention.
  • the method can i.a. be applied in a bus system 1, in which a master device 2 to a plurality of slave devices 3-1 - 3-n device identifiers 4 must assign.
  • a first step S1 the method provides for the transmission of a device identifier 4 not assigned in the bus system 1 by the master device 2 to a slave device 3-1-3-n coupled to the master device 2.
  • a second step S2 the slave device 3-1 - 3-n checks which of the
  • the slave device 3-1 - 3-n stores the received
  • the slave device 3-1-3-n, to which the device identifier 4 was transmitted has already been assigned a device identifier 4, the slave device 3-1-3-n, to which the device identifier 4 was transmitted, transmits the Device identifier 4 in step S4 to another slave device 3-1 - 3-n.
  • the method further provides that the step of transmission S4 is repeated by all slave devices 3-1-3-n to which a device identifier 4 has already been assigned.
  • the present method is based on the fact that the individual slave devices 3-1 - 3-n are activated in order and assigned a device identifier 4 in turn.
  • the slave devices 3-1-3-n themselves check whether they have already been initialized, that is to say whether a device identifier 4 has already been assigned to them.
  • the forwarding of the device identifier 4 by a slave device 3-1 - 3-n is done passively and automatically, i. that no active computing device or the like is necessary for forwarding.
  • the method provides that the slave devices 3-1 - 3-n receive the device identifier 4 via a first slave bus interface 10-1 - 10-n. Furthermore, the method provides that the slave devices 3-1 - 3-n transmit the device identifier 4 via a second slave bus interface 1 1 -1 - 1 1 -n to another slave device 3-1 - 3-n ,
  • the second slave bus interface 1 1 1 -1 -1 1 -n is deactivated.
  • Such slave devices 3-1 - 3-n can not forward the device identifier 4 via the second slave bus interface 1 1 -1 - 1 1 -n, if they have not received a device identifier 4.
  • the respective slave device 3-1-3-n has its corresponding second slave bus interface 1 1 -1 - 1 1 -n activated.
  • the individual slave devices 3-1 - 3-n can be initialized solely by the sequential over-centering of the device identifiers 4 by the master device 2.
  • the method steps S1-S4 are repeated until a device identifier 4 has been assigned to all slave devices 3-1-3-n. In such an embodiment, therefore, the master device 2 transmits a device identifier 4 for each slave device 3-1-3n.
  • the method is used in a CAN bus system 1.
  • the slave devices 3-1 - 3-n each have a first CAN transceiver 12-1 - 12-n for the first slave bus interface 10-1 - 10-n and a second CAN transceiver 13-1 - 13 -n for the second slave bus interface 1 1 -1 - 1 1 -n.
  • the first CAN transceiver 12-1 - 12-n and the second CAN transceiver 13-1 - 13-n in the respective slave device 3-1 - 3-n are coupled to each other in such a way that data signals which on one of the CAN transceivers 12-1 - 12-n, 13-1 - 13-n, to a computing device 14 of the slave device 3-1 - 3-n and to the other CAN transceiver 12-1 - 12 -n, 13-1 - 13-n for distribution.
  • the arbitration of the access to the CAN data lines of the CAN bus system 1 is provided, wherein for arbitration, the data lines between the computing device 14-1 - 14-n and the first CAN transceiver 12-1 - 12-n and the second CAN transceiver 13-1 - 13-n are set to a positive reference voltage when there is no communication on the data lines. This can be done, for example, by a pull-up resistor.
  • 2 shows a block diagram of an embodiment of a master device 2 according to the invention.
  • the master device 2 has a control device 16, which is coupled to a master bus interface 15.
  • the control device 16 can output a device identifier 4 via the master bus interface 15.
  • the bus system 1 is designed as a CAN bus system 1.
  • the master bus interface 15 is designed as a CAN bus interface 15.
  • the master device 2 may e.g. a higher level controller in an automobile that controls a number of slave devices 3-1-3-n.
  • the master device 2 may be a battery control device 2 in an electric vehicle including the
  • the slave device 3-1 has a computing device 14-1, which is coupled to a first slave bus interface 10-1 and to a second slave bus interface 1 1 -1.
  • the second slave bus interface 1 1 -1 is deactivated.
  • the computing device 14-1 is designed to receive a device identifier 4 via the first slave bus interface 10-1 and then to activate the second slave bus interface 1 1 -1. Only after activation can data be sent via the second slave bus interface 1 1 -1.
  • the activation of the second slave bus interface 1 1 - 1 may e.g. by means of a simple logical AND circuit of the signal input of the second slave bus interface 1 1 -1 and a device-internal activation signal, which is output by the computing device 14-1. This is shown in Fig. 5 in detail.
  • the bus system 1 is a CAN bus system 1 with a CAN bus as the data bus, as already explained above.
  • the first slave bus interface 10-1 and the second slave bus interface 1 1 -1 as CAN Bus interfaces 10-1 and 1 1 -1, each with a CAN transceiver 12-1, 13-1 formed (see Fig. 5).
  • the first slave bus interface 10-1 and the second slave bus interface 1 1 -1 are interconnected in one embodiment so that signals on the data lines of the CAN bus, on one of the slave bus interfaces 10-1, 1 1 -1, the computing device 14-1 and the other of the slave bus interfaces 1 1 -1, 10-1 are provided.
  • the slave devices 3-1 - 3-n in a series connection or daisy chain, in which the master device 2 and each slave device Device 3-1 - 3-n receives the data, which from other devices eg Master device 2 and slave devices 3-1 - 3-n are sent on the CAN bus.
  • FIG. 4 shows a block diagram of an embodiment of a bus system 1 according to the invention.
  • the bus system 1 of FIG. 4 is designed as a CAN bus system 1.
  • the bus system 1 has a master device 2, which is coupled via two CAN data lines CAN_H, CAN_L to the first slave bus interface 10-2 of the slave device 3-2.
  • the second slave bus interface 1 1 -2 of the slave device 3-2 is coupled to the first slave bus interface 10- 3 of the slave device 3-3.
  • the second slave bus interface 1 1 -3 of the slave device 3-3 is coupled to the first slave bus interface 10-n of the slave device 3-n. In this case, further slave devices between slave device 3-3 and slave device 3-n are indicated by three points.
  • the CAN bus of FIG. 4 has two data lines CAN_H and CAN_L. Since a CAN bus is a differential bus system, one of the two data lines carries the high signal and the other the low signal. Consequently, the abbreviation CAN_H stands for CAN HIGH and the abbreviation CAN_L stands for CAN LOW.
  • FIG. 5 shows a block diagram of a further embodiment of a bus system 1 according to the invention.
  • FIG. 5 only three slave devices 3-4, 3-5 and 3-n are shown, whereby further slave devices between slave device 3-5 and slave device 3-n are represented by three dots.
  • the slave devices 3-4 - 3-n all have the same structure. The structure of the slave devices is therefore explained as an example on slave device 3-4.
  • the data output RX of the first CAN transceiver 12-4 is connected to the input of the logical AND block 20-4 and to the input of the logical AND gate. Blocks 22-4 coupled.
  • the output of the logical AND block 20-4 is coupled to the data input CAN0_RX of the computing device 14-4.
  • the data output CAN0_TX of the computing device 14-4 is coupled to the input of the logical AND block 21 -4 and coupled to the input of the logical AND block 22-4.
  • the output of the logical AND block 21 -4 is coupled to the data input TX of the first CAN transceiver 12-4.
  • the second CAN transceiver 13-4 is coupled to the data lines CAN_H and CAN_L of the CAN bus between the slave device 3-4 and the next slave device of the series circuit, the slave device 3-5.
  • the data output RX of the second CAN transceiver 13-4 is coupled to the input of the logical AND block 20-4 and to the input of the logical AND block 21 -4.
  • an activation output EN_CAN1_TX of the computing device 14-4 is coupled to the input of the AND block 22-4 whose output is coupled to the data input TX of the second CAN transceiver 13-4.
  • the illustrated embodiment of the slave device 3-4 allows signals received from one of the two CAN transceivers 12-4, 13-4 to be automatically or passively transmitted to the other CAN transceiver, respectively.
  • a signal output from the computing device 14-4 may also be passively transmitted to the two CAN transceivers 12-4 and 13-4, respectively.
  • Arbitration of the data communication may be e.g. by a pull-up resistor (not shown) arranged at the TX and RX terminals of the two CAN transceivers 12-4, 13-4, respectively.
  • the CAN transceiver can also be activated by a reset or inhibit input.
  • the present invention has been described above with reference to preferred embodiments, it is not limited thereto, but modifiable in a variety of ways. In particular, the invention can be varied or modified in many ways without deviating from the gist of the invention.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)

Abstract

La présente invention concerne un procédé d'attribution d'identifiants d'appareil dans un système de bus avec un appareil maître et au moins deux appareils esclaves. Ledit procédé comprend les étapes suivantes : transmission d'un identifiant d'appareil, non attribué dans le système de bus, par l'appareil maître à un appareil esclave couplé à l'appareil maître ; vérification par l'appareil esclave auquel l'identifiant d'appareil a été transmis si un identifiant d'appareil a déjà été assigné à l'appareil esclave ; enregistrement de l'identifiant d'appareil reçu dans l'appareil esclave auquel l'identifiant d'appareil a été transmis en tant qu'identifiant d'appareil assigné, si un identifiant d'appareil n'a pas encore été assigné à l'appareil esclave ; et transmission de l'identifiant d'appareil à un autre appareil esclave, par l'appareil esclave auquel l'identifiant d'appareil a été transmis, si un identifiant d'appareil a déjà été assigné à l'appareil esclave auquel l'identifiant d'appareil a été transmis, l'étape de transmission étant répétée par tous les appareils esclaves auxquels un identifiant d'appareil a déjà été assigné. La présente invention concerne en outre un appareil maître, un appareil esclave et un système de bus.
PCT/EP2014/075930 2013-12-23 2014-11-28 Procédé d'attribution d'identifiants d'appareil dans un système de bus, appareil maître, appareil esclave et système de bus WO2015096953A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013227057.7A DE102013227057A1 (de) 2013-12-23 2013-12-23 Verfahren zur Vergabe von Geräteidentifikatoren in einem Bussystem, Master-Gerät, Slave-Gerät und Bussystem
DE102013227057.7 2013-12-23

Publications (1)

Publication Number Publication Date
WO2015096953A1 true WO2015096953A1 (fr) 2015-07-02

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PCT/EP2014/075930 WO2015096953A1 (fr) 2013-12-23 2014-11-28 Procédé d'attribution d'identifiants d'appareil dans un système de bus, appareil maître, appareil esclave et système de bus

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DE (1) DE102013227057A1 (fr)
FR (1) FR3015720A1 (fr)
WO (1) WO2015096953A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3736081A1 (de) * 1987-10-24 1989-05-03 Licentia Gmbh Verfahren und vorrichtung zur adresseneinstellung von an einen bus angeschlossenen teilnehmern
DE102005014124A1 (de) * 2005-03-22 2006-09-28 E.G.O. Elektro-Gerätebau GmbH Verfahren zur dynamischen Vergabe von Adressen sowie zugehörige Verwendung für Heizeinrichtungen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3736081A1 (de) * 1987-10-24 1989-05-03 Licentia Gmbh Verfahren und vorrichtung zur adresseneinstellung von an einen bus angeschlossenen teilnehmern
DE102005014124A1 (de) * 2005-03-22 2006-09-28 E.G.O. Elektro-Gerätebau GmbH Verfahren zur dynamischen Vergabe von Adressen sowie zugehörige Verwendung für Heizeinrichtungen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JAN POLFLIET ET AL: "CAN for energy efficiency in cars", 13 March 2012 (2012-03-13), XP055168754, Retrieved from the Internet <URL:http://www.can-cia.org/fileadmin/cia/files/icc/13/polfliet.pdf> [retrieved on 20150210] *

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DE102013227057A1 (de) 2015-06-25
FR3015720A1 (fr) 2015-06-26

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