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
  • H04L12/40169—Flexible bus arrangements
• • 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
  • H04L41/0813—Configuration setting characterised by the conditions triggering a change of settings
  • H04L41/0816—Configuration setting characterised by the conditions triggering a change of settings the condition being an adaptation, e.g. in response to network events
• • 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
  • H04L2012/40267—Bus for use in transportation systems
  • H04L2012/40273—Bus for use in transportation systems the transportation system being a vehicle

Definitions

• Subscriber station of a bus system Subscriber station of a bus system, a programming tool and a
• Bus system that communicates according to different protocols
• Bus system is in which Classic CAN subscriber stations and CAN FD
• Subscriber stations are available and can communicate.
• the CAN bus system has gained wide acceptance for communication between sensors and ECUs. For example, it will be in
• a Classic CAN subscriber station according to the present application is implemented according to the current valid IS011898-1, does not support CAN FD and is also not CAN FD tolerant. If a Classic CAN subscriber station receives a CAN FD message, it sends the subscriber station
• Error messages so-called ErrorMessages, or error frames, so-called error frames.
• a CAN-FD subscriber station can send and receive both CAN-FD messages and Classic-CAN messages.
• Both options may require adaptation of the Classic CAN user station in the network. This adjustment must either be done by software to disable the protocol controller. Or the Adaptation is by an extension of the hardware to make partial networking enabled transceiver.
• Another way of solving the aforementioned problem of sending CAN-FD messages in the mixed network is to remove the CAN-FD subscriber stations to be programmed from the network and to connect them to a separate programming station via CAN FD program.
• the expansion variant is not always feasible. If the Classic-CAN subscriber stations of an existing network can not be adapted and if it is not possible to expand the CAN-FD subscriber station to be programmed, the lowest common denominator, the Classic CAN format, is used to transmit the data to be programmed. Thus, no transmission according to the CAN FD format is then also possible for CAN-FD subscriber stations.
• Communication control device for a subscriber station of a bus system, a programming tool and a method for programming individual subscriber stations in a bus system, which according to different
• Communication control device for a subscriber station of a bus system, a programming tool and a method for programming individual subscriber stations in a bus system, which according to different
• Protocols communicating subscriber stations are provided, which a transmission according to the CAN FD format also in enable mixed bus systems with Classic CAN subscriber stations and CAN FD subscriber stations.
• the object is achieved by a communication control device for a
• the communication control device is configured to create or read at least one message for / from at least one further subscriber station of the bus system, in which an exclusive, collision-free access of a subscriber station to a bus of the bus system is ensured at least temporarily, wherein the communication control device prepares for programming at least one further subscriber station is configured in the bus system, as long as to send messages which cause the at least one further subscriber station to send error frames until the at least one further subscriber station in a
• Error state is in which send the at least one other subscriber station no error frame with an active error detection more.
• the communication control device makes it possible to program a CAN FD subscriber station via a CAN FD transmission in a mixed network consisting of Classic CAN and CAN FD subscriber stations, without changing the existing Classic CAN subscriber stations or the CAN to be programmed Expand FD subscriber station.
• the method performed by the communication controller uses mechanisms of the CAN subscriber stations that are present in all of today
• Send error frames more may be a state "Error Passive” or “Bus Off” according to the CAN specification in IS011898.
• the messages of the subscriber station can be CAN-FD messages.
• the aforementioned object is also achieved by a programming tool for a bus system according to claim 4.
• the programming tool comprises a device for programming a subscriber station of a bus system in which an exclusive, collision-free access of a subscriber station to a bus of the bus system is ensured at least temporarily,
• Subscriber station is configured in the bus system, as long as to send messages, which another subscriber station to send out
• Error state is in which the other subscriber station emits no error frame with an active error detection more.
• the programming tool offers the same advantages as previously mentioned with respect to the communication controller.
• the communication control device described above may be part of a bus system, which also includes a bus line and subscriber stations, which are connected to each other via the bus line so that they can communicate with each other.
• a bus system which also includes a bus line and subscriber stations, which are connected to each other via the bus line so that they can communicate with each other.
• at least two of the subscriber stations have a previously described communication control device and at least one of the subscriber stations is another subscriber station.
• the bus system can also have a previously described programming tool, wherein for sending the messages, to prepare a
• the programming tool is configured to start the transmission of the message by the subscriber stations to be programmed by a UDS diagnostic service.
• the method comprises the steps of: creating or reading, with a communication control device, at least one message for / from at least one further subscriber station of the bus system, in which at least temporarily an exclusive, collision-free access
• Error state is in which the at least one further subscriber station no longer sends out error frames with an active error identifier.
• the procedure may use the UDS Diagnostic Service "Control Communication - disable non-diagnostic communication".
• 1 is a simplified block diagram of a bus system according to a first embodiment
• 2 shows a schematic representation of the state change of a CAN subscriber station according to ISO 11898-1, which is used in the programming according to a first exemplary embodiment
• bus system 1 shows a bus system 1, which may be, for example, a CAN bus system or a CAN FD bus system, etc.
• the bus system 1 can be in a
• Vehicle especially a motor vehicle, an aircraft, etc., or in the hospital, etc. find use.
• the bus system 1 has a plurality of subscriber stations 10, 20 and a programming tool 30, which are each connected to a bus line 5. Messages 7, 8, 9 in the form of signals between the individual subscriber stations 10, 20 can be transmitted via the bus line 5.
• the subscriber stations 10 have a communication control device 11, a transmitting / receiving device 12 (transceiver), a reception error counter REC and a transmission error counter TEC.
• the subscriber stations 20 have a communication control device 21, a transceiver 22, a reception error counter REC and a transmission error counter TEC.
• the programming tool 30 has a device 31.
• the transmitting / receiving devices 21, 22 are each connected to the bus line 5, even if not shown in Fig. 1.
• the subscriber stations 10, 20 may be, for example, control devices or display devices of a motor vehicle.
• the subscriber stations 10 are Classic CAN subscriber stations according to the current valid IS011898-1 and do not support CAN FD and are also not CAN FD tolerant. in the
• the subscriber stations 20 are CAN-FD subscriber stations, which will implement this in the upcoming IS011898-1 standard CAN FD - CAN with Flexible Datarate Protocol (currently in the draft, completion of work expected in late 2014).
• the subscriber stations 20 can transmit and receive both CAN FD messages 7, 8 and Classic CAN messages 9.
• the Classic CAN messages 8 are error frames with active error detection
• the CAN-FD messages 9 are frames for positively acknowledging receipt of one of the messages 7.
• the programming tool 30 may also send messages 7 to the bus 5.
• the messages 7, 8 are CAN-FD messages, whereas the
• Communication control devices 11 largely the functions as a CAN controller.
• the communication controllers 21 and the device 31 have much of the functions as a CAN-FD controller, but also messages 9 can be read and created according to the CAN protocol.
• Subscriber stations 10, 20 of the bus system 1 are used. Therefore, one of the subscriber stations 20 executes the following procedure. After carrying out the method, the programming of a CAN FD subscriber station via a CAN FD transmission in the mixed bus system 1 consisting of Classic CAN and CAN FD subscriber station 10, 20 can take place without the existing Classic CAN subscriber stations 10 or to expand the CAN-FD subscriber stations 20 to be programmed.
• the method thus prepares the programming of a subscriber station 20 and is thus not the normal operation of the subscriber stations 10, 20, the For example, are installed in a vehicle, and the bus system. 1
• all subscriber stations 10, which do not support the faster transmission variant, are dedicatedly put into an error state in which they do not send messages 9, ie CAN error frames with an active error flag (six consecutive dominant bits).
• FIG. 2 shows possible states 40, 50, 60 of the CAN subscriber stations 10 from ISO 11898-1.
• the state 40 is a state "Error Active" (receiver), in which a CAN subscriber station 10 as a receiver of a message 7, 8 a message 9, ie a CAN Error Frame with Active Error Flag (six consecutive dominant bits).
• the state is reached in accordance with ISO 11898-1 by an initialization request RI (Initialization_Request Init) or by sending a CAN FD message 7. If the condition R2 satisfies that the receive error counter REC> 127 or the transmit error counter TEC> 127 applies , the CAN subscriber station 10 goes as a receiver one
• RI Initialization_Request Init
• Condition R21 is satisfied, the CAN subscriber stations 10 as receiver of a message 7, 8 from the state 50 "Error Passive” back to the state 40 "Error Active” back.
• condition R3 is satisfied in the state 50 that the transmission error counter TEC> 255
• the CAN subscriber stations 10, as the receiver of a message 7, 8, go into the state 60 "Bus Off” and can thus no longer send messages
• Condition R4 which is a user request and a 128 occurrences of 11 consecutive recessive bits, returns CAN user station 10 to state 40 "Error Active" (receiver).
• Subscriber station 20 Subscriber stations 10 in state 50 "Error Passive” or 60 “Bus Off” must also remain in one of these states 50, 60 during the faster transmission in accordance with CAN FD for the programming of subscriber station 20 to be programmed.
• FIG. 3 is a flowchart illustrating the one described above
• the method described above is called by the programming tool 30 via the UDS diagnostic service "Routine Control - change error State of Classic-CAN nodes.”
• the subscriber station 20 to be programmed makes this routine available and assumes the role of the transmitter from initial CAN-FD Messages 7.
• the routine is completed positively if the CAN-FD messages 7 sent by the subscriber station 20 to be programmed do not generate messages 8 (error frames) in the bus system 1. Only after positive completion of the routine of the method is the
• Time would be e.g. after the subscriber station 20 to be programmed has already changed to the boot loader (boot loader).
• the programming tool 30 has the option of using the UDS command "Link Control - switch to CAN FD
• the method uses mechanisms of the CAN subscriber stations 10, which are typically implemented in all subscriber stations 10, 20 today and thus already available.
• the UDS diagnostic service "Control Communication - disable non-diagnostic communication" is explicitly used.
• UDS Unified Diagnostic Services
• the cyclical transmission of a functionally addressed UDS command -Tester Present - to all subscriber stations 10, 20 is started by the programming tool 30 in a step S1. This is to prevent the Classic CAN subscriber stations 10 from resuming transmission ("Tester Present - suppressing positive response") .
• the UDS command is sent cyclically later throughout the entire cycle
• step S2 a functionally addressed UDS command - Diagnostic Session Control - is started to all subscriber stations 10, 20 in order to switch to an extended function (switch to extended session). Thereafter, the flow proceeds to a step S3.
• step S3 a functionally addressed UDS command - Communication Control - is started to all subscriber stations 10, 20 in order to deactivate a non-diagnostic communication. Thereafter, the flow proceeds to a step S4.
• step S4 if necessary, further preparatory steps such as - switching off the error detection, checking logistic identifiers, etc.
• step S4 can therefore be omitted. Thereafter, the flow proceeds to a step S31.
• step S31 as in step S3, all of them again
• Subscriber stations 10, 20 a functionally addressed UDS command - Communication Control - started to disable a non-diagnostic communication. Thereafter, the flow proceeds to a step S5.
• a physically addressed UDS command - routine control - is started on the subscriber station 20 to be programmed in order to change the error status of the subscriber stations 10 (change error state of classic CAN nodes). This takes place in order to put the classic CAN subscriber station 10, which is not involved in the programming process, in an error state.
• either one of the subscriber stations 20 or the programming tool sends messages 7, so CAN FD messages.
• the Classic CAN subscriber station 10 then send messages 9, ie error frames and increment their internal receive error counter REC.
• Subscriber station 20 as the transmitter of the CAN FD message 7 increments its internal transmitter error counter TEC on the basis of the messages 8. However, since at least one further CAN-FD subscriber station 20 is available in the bus system 1, CAN-FD messages 7 are also positively acknowledged with a message 8, and thus the transmitter error counter TEC of the transmitter is decremented again. Depending on the value of the counters REC, TEC, the CAN subscriber stations 10 change state, as described with reference to FIG. It is possible that the CAN-FD subscriber station 20 as the sender of the messages 7 also in the state 50 "Error Passive" and then in the state 60 "Bus Off 'goes.
• Communication controller 21 is restarted. After that, the CAN-FD subscriber station 20 sends further messages 7 with the faster one
• Subscriber stations 10 have reached the error state 50 or 60 and, as long as they are in the error state 50 or 60, no messages 9, so send error frames (error frames) more.
• step S6 the subscriber station 20 to be programmed is programmed with the programming tool 30. Accordingly, in step S6 to the subscriber station to be programmed 20, a physically addressed UDS command to switch to the boot loader - Diagnostic Session Control - started to a
• step S7 a physically addressed UDS command - Link Control - is sent to the subscriber station 20 to be programmed in order to switch to CAN FD communication (switch to CAN FD communication). Thereafter, the flow proceeds to a step S8.
• step S8 a standard sequence of programming is executed.
• the method is performed in the present embodiment by the programming tool 30 before the actual programming starts. This is, as previously described, inter alia with the help of
• Subscriber stations 10, 20 then stop autonomously sending CAN messages 7, 8, 9. As a result of the fact that the Classic CAN subscriber station 10 no longer sends messages 9, your internal error counter will no longer be decremented, and thus these subscriber stations 10 will be in the
• the programming tool 30 transmits cyclically throughout
• the application of the invention is the programming of a subscriber and thus not the normal operation of the vehicle and the bus system. 1
• the method is performed instead of the programming tool 30 by the subscriber station 20 to be programmed before the actual programming starts. Otherwise, the bus system and the method carried out by it are carried out in the same way as described for the first embodiment.
• Subscriber stations 10, 20, the communication control device 21, the programming tool 30 and the method can be used individually or in all possible combinations.
• all the features of the embodiments described above can be combined as desired.
• the following modifications are conceivable, in particular.
• bus system 1 according to the exemplary embodiments described above is described on the basis of a bus system based on the CAN protocol.
• bus system 1 according to the embodiments may also be another type of communication network. It is advantageous, but not necessarily a prerequisite, that in the bus system 1 at least for certain
• Time periods an exclusive, collision-free access of a subscriber station 10, 20 is guaranteed to a common channel.
• the number and arrangement of the subscriber stations 10, 20 in the bus system 1 of the embodiments is arbitrary.

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

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• 2014
  • 2014-08-05 DE DE102014215469.3A patent/DE102014215469A1/de active Pending
• 2015
  • 2015-07-28 CN CN201580053853.4A patent/CN107113209B/zh active Active
  • 2015-07-28 EP EP15747127.7A patent/EP3178204A1/de not_active Withdrawn
  • 2015-07-28 WO PCT/EP2015/067254 patent/WO2016020225A1/de active Application Filing
  • 2015-07-28 KR KR1020177006117A patent/KR102423667B1/ko active IP Right Grant

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