DE102014215469A1 - Communication control device for a subscriber station of a bus system, programming tool and method for programming subscriber stations in a bus system having subscriber stations communicating according to different protocols - Google Patents

Abstract

There are provided a subscriber station (20) for a bus system (1) and a method for programming individual subscriber stations (20) in a bus system (1) which has subscriber stations (10, 20) communicating according to different protocols. The subscriber station (20) has a communication control device (21) for creating or reading at least one message (7, 8, 9) for / from at least one further subscriber station (10; 20) of the bus system (1), in which at least temporarily exclusive, collision-free access of a subscriber station (10, 20) on a bus (5) of the bus system (1) is ensured, wherein the communication control device (21) for preparing a programming of at least one further subscriber station (10) in the bus system (1) is configured to send messages (7) which cause the at least one further subscriber station (10) to transmit error frames (8) until the at least one further subscriber station (10) is in an error state in which the at least one further subscriber station (10 ) send out any error frames (8) with an active error detection.

Description

Technical area

The present invention relates to a 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 having subscriber stations communicating according to different protocols, wherein the bus system is in particular a bus system in which Classic CAN subscriber stations and CAN -FD subscriber stations are present and can communicate.

State of the art

The CAN bus system has gained wide acceptance for communication between sensors and ECUs. For example, it is used in automobiles. In the CAN bus system messages are transmitted by means of the CAN protocol, as described in the CAN specification in the ISO11898 is described. More recently, techniques have been proposed for this, such as CAN-FD, in which messages conforming to the specification "CAN with Flexible Data Rate, Specification Version 1.0" (Source http://www.semiconductors.bosch.de In such techniques, the maximum possible data rate is increased beyond a value of 1 Mbit / s by using a higher clock rate in the area of the data fields.

A Classic CAN subscriber station according to the present application is after the current valid ISO11898-1 implemented, does not support CAN FD and is also not CAN FD tolerant. If a Classic CAN subscriber station receives a CAN FD message, the subscriber station sends error messages, so-called ErrorMessages, or error frames, so-called error frames.

In contrast, in a CAN-FD subscriber station in the upcoming ISO11898-1 Standard CAN FD - CAN with Flexible Datarate - Protocol (currently in the draft, completion of work presumably end of 2014) to be implemented. A CAN-FD subscriber station can send and receive both CAN-FD messages and Classic-CAN messages.

In a network or bus system consisting of Classic CAN and CAN FD subscriber stations, only Classic CAN messages can be sent, otherwise the CAN Error Frame mechanism will intervene and thus significantly disturb the communication. In certain modes, especially in the application case update programming of individual control units in an in-vehicle bus system, but a faster point-to-point communication between two participants of the bus system should be used.

In order to enable the transmission of CAN-FD messages in this constellation as well, it is conceivable that the Classic-CAN subscriber stations do not send error messages. One possibility for this is that the relevant Classic CAN subscriber stations deactivate their CAN protocol controllers or set them to monitoring mode (MonitorMode). Another possibility for this is the use of partial networking transceivers in the Classic CAN subscriber stations, and that these subscriber stations are brought to "falling asleep", in which state the subscriber stations are inactive.

Both options may require adaptation of the Classic CAN subscriber station in the network. This adjustment must either be done by software to disable the protocol controller. Or the adjustment is made by an extension of the hardware to enable partial networking transceivers.

The problem is that these options are not always feasible with existing networks in vehicles.

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.

However, since programming in production is subject to strict clock cycles, 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.

Disclosure of the invention

It is therefore an object of the present invention to provide a 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 have different protocols communicating subscriber stations, which solve the aforementioned problems. In particular, a 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 having subscriber stations communicating according to different protocols are to be provided, which transmit in accordance with the CAN FD format also in mixed bus systems with Classic -CAN subscriber stations and CAN-FD subscriber stations.

The object is achieved by a communication control device for a subscriber station of a bus system with the features of claim 1. 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 that cause the at least one other subscriber station to send error frames until the at least one further subscriber station is in an error state in which the at least one further subscriber station no error frame with an active error detection send out 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 which are typically implemented in all subscriber stations today and thus already available. As a result, the conversion effort for the Classic CAN subscriber stations is minimal.

Advantageous further embodiments of the communication control device are specified in the dependent claims.

The error state in which the other subscriber stations no longer emit error frames, a state "Error Passive" or "Bus Off" according to the CAN specification in the ISO11898 be.

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, wherein the device for preparing a programming of the subscriber station is configured in the bus system, as long as to send messages, which cause another subscriber station to send out error frames until the other subscriber station is in an error state in which the further subscriber station no longer sends out error frames with an active error identifier.

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. Here, 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.

In addition, the bus system can have a programming tool as described above, wherein the subscriber stations to be programmed or the programming tool are designed to send the messages, to prepare for programming by one of the subscriber stations.

It is also possible that 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 aforementioned object is also achieved by a method for programming individual subscriber stations in a bus system having subscriber stations communicating according to different protocols, according to claim 8. The method comprises the steps of: generating 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 an exclusive, collision-free access of a subscriber station to a bus of the bus system is ensured, at least temporarily, transmission, to prepare a programming of at least one further subscriber station in the bus system, of messages which cause the at least one further subscriber station to transmit error frames until the at least one further subscriber station is in an error state 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".

The method offers the same advantages as previously mentioned with respect to the communication controller.

Further possible implementations of the invention also include not explicitly mentioned combinations of features or embodiments described above or below with regard to the exemplary embodiments. The skilled person will also add individual aspects as improvements or additions to the respective basic form of the invention.

drawings

The invention is described in more detail below with reference to the accompanying drawings and to exemplary embodiments. Show it:

1 a simplified block diagram of a bus system according to a first embodiment;

2 a schematic representation of the state change of a CAN subscriber station according to the ISO 11898-1 used in programming according to a first embodiment; and

3 a flowchart of a method according to the first embodiment.

In the figures, identical or functionally identical elements are provided with the same reference numerals, unless stated otherwise.

Description of the embodiments

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 used in a vehicle, in particular a motor vehicle, an aircraft, etc., or in the hospital, etc.

In 1 has the bus system 1 a variety of subscriber stations 10 . 20 and a programming tool 30 , each to a bus line 5 are connected. Over the bus line 5 can news 7 . 8th . 9 in the form of signals between the individual subscriber stations 10 . 20 be transmitted. For this the participant stations have 10 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 transmitting / receiving device 22 (Transceiver), a reception error counter REC and a transmission error counter TEC. The programming tool 30 has a facility 31 , The transmitting / receiving devices 21 . 22 are each to the bus line 5 connected, even if the in 1 not shown.

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 ISO11898-1 and do not support CAN FD nor are they CAN FD tolerant. In contrast, the subscriber stations 20 CAN-FD subscriber stations, which in the coming ISO11898-1 standard CAN FD - CAN with Flexible Datarate - Protocol (currently in the draft, completion expected in late 2014). The subscriber stations 20 can both CAN FD messages 7 . 8th as well as Classic CAN messages 9 send and receive. The Classic CAN messages 8th are error frames with active error detection (error flag). The CAN-FD messages 9 are frames for positively acknowledging receipt of one of the messages 7 , The programming tool 30 can also messages 7 on the bus 5 send.

Thus, the news 7 . 8th CAN-FD messages, whereas the news 9 Classic-CAN messages are. Therefore, the communication controllers have 11 in many parts the functions as a CAN controller. The communication control devices 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.

Receives one of the subscriber stations 10 a message 7 , sends the subscriber station 10 in response, an error message, a so-called ErrorMessage, or an error frame, a so-called Error Frame, namely a message 9 , This is the communication on the bus line 5 disturbed.

In update programming mode of individual subscriber stations 10 . 20 , is supposed to provide faster point-to-point communication between two subscriber stations 10 . 20 of the bus system 1 be used. Therefore, one of the subscriber stations 20 the following procedure is carried out. After performing 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 without the existing Classic CAN subscriber stations 10 or the CAN-FD subscriber stations to be programmed 20 expand.

The method thus prepares the programming of a subscriber station 20 before and is therefore not the normal operation of the subscriber stations 10 . 20 , which are installed in a vehicle, for example, and the bus system 1 , Therefore, the return of the bus system 1 in normal operation by restarting all subscriber stations 10 . 20 allowed.

In the process, all subscriber stations become 10 which do not support the faster transmission variant, dedicates to an error state in which they do not receive messages 9 , ie CAN error frames with an active error flag (Active Error Flag) (six consecutive dominant bits) send.

2 shows possible states 40 . 50 . 60 the CAN subscriber stations 10 from the ISO 11898-1 , The state 40 is an "Error Active" (receiver) state in which a CAN subscriber station 10 as the recipient of a message 7 . 8th a message 9 , ie sends a CAN Error Frame with active error flag (six consecutive dominant bits). The condition is according to ISO 11898-1 by an Initialization Request R1 or by sending a CAN FD message 7 reached. If the condition R2 is satisfied that the receive error counter REC> 127 or the transmit error counter TEC> 127, the CAN subscriber station goes 10 as the recipient of a message 7 . 8th in the state 50 "Error Passive". Conversely, if the condition R21 is met, the CAN subscriber stations goes 10 as the recipient of a message 7 . 8th from the state 50 "Error Passive" back to the state 40 "Error Active" back. Is in condition 50 However, the condition R3 satisfies that the transmission error counter TEC> 255 applies, the CAN subscriber stations goes 10 as the recipient of a message 7 . 8th in the state 60 "Bus Off", and therefore can no longer send messages. By the condition R4, which is a user request and a 128 times occurrence of 11 consecutive recessive bits, the CAN subscriber station goes 10 back to the state 40 "Error Active" (receiver) back.

In the states 50 . 60 , ie "Error Passive". and "Bus Off" send the subscriber stations 10 no news 9 , ie error frames with active error flag (Active Error Flag), or so few messages 9 , ie error frames, so that the communication of the CAN FD subscriber stations 20 by means of the faster transmission variant CAN FD from the CAN subscriber stations 10 not significantly disturbed, if at all.

Only then does the transfer of the data to be programmed in CAN FD format from the programming tool begin 30 to the subscriber station to be programmed 20 , The subscriber stations 10 in condition 50 "Error Passive" or 60 "Bus Off" must also be used during the faster transmission according to CAN FD for the programming of the subscriber station to be programmed 20 , in one of these states 50 . 60 stay.

3 Illustrates in a flow chart the method described above in more detail. In the schematic illustration, the method described above is performed by the programming tool 30 called via the UDS diagnostic service "Routine Control - change error state of Classic-CAN nodes". The subscriber station to be programmed 20 Provides this routine and assumes the role of the sender of initial CAN FD messages 7 , The routine is completed positively when the subscriber station to be programmed 20 sent CAN-FD messages 7 no news 8th (Error Frames) in the bus system 1 to generate. Only after positive completion of the routine of the procedure, the standard programming sequence is continued. From this point CAN-FD messages can 7 be used for programming, a good time would be, for example, after the subscriber station to be programmed 20 already changed into the bootloader (bootloader). The programming tool 30 has the option of using the UDS command "Link Control - switch to CAN FD communications" of the subscriber station to be programmed 20 to signal from when the communication on the use of CAN FD messages 7 is converted.

The method uses mechanisms of the CAN subscriber stations 10 that today in all subscriber stations 10 . 20 typically implemented and thus already available. The UDS diagnostic service "Control Communication - disable non-diagnostic communication" is explicitly used. UDS (Unified Diagnostic Services) is a communication protocol of automotive electronics, which is used in the ISO 14229 is specified. The UDS diagnostic service "Control Communication - disable non-diagnostic communication" is usually already part of the programming sequence and thus in all subscriber stations 10 . 20 implemented.

After starting the procedure for preparing the programming of a subscriber station 20 becomes at step S1 from the programming tool 30 the cyclical transmission of a functionally addressed UDS command - Tester Present - to all subscriber stations 10 . 20 started. This is to prevent the Classic CAN subscriber stations 10 resume sending ("Tester Present - suppress positive response"). The cyclic transmission of the UDS command occurs later during the entire programming process. Thereafter, the flow proceeds to a step S2.

In step S2 is sent to all subscriber stations 10 . 20 a functionally addressed UDS command - Diagnostic Session Control - started to switch to an extended function (switch to extended session). Thereafter, the flow proceeds to a step S3.

In step S3 is sent to all subscriber stations 10 . 20 a functionally addressed UDS command - Communication Control - started to deactivate non-diagnostic communication. Thereafter, the flow proceeds to a step S4.

If necessary, further preparatory steps, such as switching off the error detection, checking logistics identifiers, etc., are carried out in step S4. The step S4 can therefore be omitted. Thereafter, the flow proceeds to a step S31.

In step S31, as in step S3, again to all subscriber stations 10 . 20 a functionally addressed UDS command - Communication Control - started to deactivate non-diagnostic communication. Thereafter, the flow proceeds to a step S5.

In step S5 is sent to the subscriber station to be programmed 20 a physically addressed UDS command - Routine Control - started to indicate the error status of the subscriber stations 10 change error state of Classic-CAN nodes). This is done by the Classic CAN subscriber station not involved in the programming process 10 to put in an error state. Either one of the subscriber stations transmits for this purpose 20 or the programming tool Messages 7 , so CAN-FD messages. The Classic CAN subscriber station 10 then send messages 9 , so error frames and increment your internal receive error counter REC. The subscriber station 20 as sender of the CAN-FD message 7 increments due to the messages 8th its internal transmitter error counter TEC. But there is at least one more CAN-FD subscriber station 20 in the bus system 1 available, become CAN FD messages 7 also positive with a message 8th acknowledged and thus the transmitter error counter TEC of the transmitter again decrements. Depending on the value of the counters REC, TEC, the CAN subscriber stations change 10 their condition as regards 2 described. It is possible that the CAN-FD subscriber station 20 as a sender of the news 7 also in the state 50 "Error Passive" and then in the state 60 "Bus Off" goes.

If the CAN-FD subscriber station 20 as a sender of the news 7 their condition changes, so no longer in the state 40 "Error Active" is the CAN-FD subscriber station 20 as a sender of the news 7 recognize this change of state and independently back to the state 40 Change "Error Active". This change can take place by, for example, the communication control device 21 is restarted. Then the CAN-FD subscriber station sends 20 Further news 7 with the faster transfer rate according to CAN FD. The CAN-FD subscriber station 20 repeats this until their internal error counters REC and TEC after sending a CAN FD message 7 no longer be incremented. This means that all subscriber stations not involved in the programming to be carried out 10 the error condition 50 or 60 have achieved and, as long as they are in the error state 50 or 60 are, no news 9 , so error frames send more.

Thereafter, the flow proceeds to a step S6.

At step S6 and subsequent steps S7 and S8, the subscriber station to be programmed becomes 20 with the programming tool 30 programmed. As a result, at step S6, the subscriber station to be programmed is called 20 a physically addressed UDS command to change to the boot loader - Diagnostic Session Control - started to switch to a programming mode (switch to programming session). Thereafter, the flow proceeds to a step S7.

In step S7, the subscriber station to be programmed is sent 20 a physically addressed UDS command - Link Control - sent to switch to CAN FD communication (switch to CAN FD communication). Thereafter, the flow proceeds to a step S8.

At step S8, a standard sequence of programming is executed. Thereafter, the process is completed. After restarting the subscriber stations 10 . 20 can the normal operation of the bus system 1 be resumed.

The method is in the present embodiment by the programming tool 30 performed before the actual programming starts. This is, as previously described, inter alia with the help of the programming tool 30 the UDS diagnostic service "Communication Control - disable non-diagnostic communication" functionally to all subscriber stations 10 . 20 as described with respect to steps S3 and S31. The subscriber stations 10 . 20 then send the independent sending of CAN messages 7 . 8th . 9 one. Due to the fact that the Classic CAN subscriber station 10 no news 9 Send more, your internal error counter is no longer decremented, and thus these subscriber stations 10 in the error state as described with respect to step S5. So that the Classic CAN subscriber stations 10 do not resume sending sends the programming tool 30 cyclically during the entire programming process via the UDS protocol the command "Tester Present - suppress positive response" to at least all user stations 10 as described with respect to step S2.

The method described above, the participant stations not involved 10 defined in an error state 50 . 60 and then perform the actual programming by means of the faster transfer rate, should be performed after the preparatory steps described above. Thus, it can be ensured that the corresponding subscriber station in the state 50 "Error Passive" or 60 Stay "Bus Off". Would these subscriber stations 10 Sending messages successfully and then decrementing their internal error counters could cause the subscriber station 10 return to the "Error Active" state.

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 , Therefore, the return of the bus system 1 in normal operation by restarting all subscriber stations 10 . 20 allowed.

This will be an adaptation of the Classic CAN subscriber station 10 in the bus system 1 either software-based, to disable the protocol controller, or allow hardware expansion by partial-networking enabled transceivers.

According to a second embodiment, the method is used instead of the programming tool 30 through the subscriber station to be programmed 20 performed 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.

All previously described embodiments of the bus system 1 , the 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. In particular, all the features of the embodiments described above can be combined as desired. In addition, the following modifications are conceivable, in particular.

The bus system described above 1 according to the embodiments is described based on a based on the CAN protocol bus system. The bus system 1 However, according to the embodiments may also be another type of communication network. It is advantageous, but not necessarily a requirement, that in the bus system 1 at least for certain periods of time an exclusive, collision-free access of a subscriber station 10 . 20 is guaranteed on a common channel.

The number and arrangement of subscriber stations 10 . 20 in the bus system 1 The embodiments is arbitrary.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited non-patent literature

• ISO11898 [0002]
• http://www.semiconductors.bosch.de [0002]
• ISO11898-1 [0003]
• ISO11898-1 [0004]
• ISO11898 [0016]
• ISO 11898-1 [0029]
• ISO11898-1 [0034]
• ISO11898-1 standard [0034]
• ISO 11898-1 [0040]
• ISO 11898-1 [0040]
• ISO 14229 [0044]

Claims (9)

Communication control device ( 21 ) for a subscriber station ( 20 ) of a bus system ( 1 ), wherein the communication control device ( 21 ) for creating or reading at least one message ( 7 . 8th . 9 ) for / from at least one other subscriber station ( 10 ; 20 ) of the bus system ( 1 ), in which, at least at times, an exclusive, collision-free access of a subscriber station ( 10 . 20 ) on a bus ( 5 ) of the bus system ( 1 ), the communication control device ( 21 ) for preparing a programming of at least one further subscriber station ( 10 ) in the bus system ( 1 ) is configured as long as messages ( 7 ), which the at least one further subscriber station ( 10 ) for sending error frames ( 8th ), until the at least one further subscriber station ( 10 ) is in an error state in which the at least one further subscriber station ( 10 ) no error frames ( 8th ) send out more with an active error detection. Communication control device ( 21 ) according to claim 1, wherein the error state in which the further subscriber stations ( 10 ) no error frames ( 8th ) send out more, a condition ( 50 . 60 ) "Error Passive" or "Bus Off" according to the CAN specification in ISO11898. Communication control device ( 21 ) according to claim 1 or 2, wherein the messages ( 7 ) the subscriber station ( 20 ) CAN-FD messages are. Programming tool ( 30 ) for a bus system ( 1 ), with a facility ( 31 ) for programming a subscriber station ( 20 ) of a bus system ( 1 ), in which at least temporarily an exclusive, collision-free access of a subscriber station ( 10 . 20 ) on a bus ( 5 ) of the bus system ( 1 ), the facility ( 31 ) for preparing a programming of the subscriber station ( 20 ) in the bus system ( 1 ) is configured as long as messages ( 7 ), which is another subscriber station ( 10 ) for sending error frames ( 8th ) until the other subscriber station ( 20 ) is in an error state in which the further subscriber station ( 10 ) no error frames ( 8th ) sends out more with an active misrecognition. Bus system ( 1 ), with a bus line ( 5 ), and subscriber stations ( 10 . 20 ), which via the bus line ( 5 ) are interconnected so that they can communicate with each other, with at least two of the subscriber stations ( 10 . 20 ) a communication control device ( 21 ) according to one of claims 1 to 3, and wherein at least one of the subscriber stations ( 10 . 20 ) another subscriber station ( 10 ). Bus system ( 1 ) according to claim 5, further comprising a programming tool ( 30 ) according to claim 4, wherein for sending the messages ( 7 ) in preparation for programming from one of the at least two of the subscriber stations ( 20 ), the subscriber stations to be programmed ( 20 ) or the programming tool ( 30 ) is configured. Bus system ( 1 ) according to claim 6, wherein the programming tool ( 30 ), sending the message ( 7 ) by the subscriber stations to be programmed ( 20 ) by a UDS diagnostic service. Method for programming individual subscriber stations ( 20 ) in a bus system ( 1 ), the subscriber stations communicating according to different protocols ( 10 . 20 ), comprising the steps of: creating or reading, with a communication control device ( 21 ), at least one message ( 7 . 8th . 9 ) for / from at least one other subscriber station ( 10 ; 20 ) of the bus system ( 1 ), in which at least temporarily an exclusive, collision-free access of a subscriber station ( 10 . 20 ) on a bus ( 5 ) of the bus system ( 1 ), sending, in preparation for programming at least one further subscriber station ( 10 ) in the bus system ( 1 ), messages ( 7 ), which the at least one further subscriber station ( 10 ) for sending error frames ( 8th ) until the at least one further subscriber station ( 10 ) is in an error state in which the at least one further subscriber station ( 10 ) no error frames ( 8th ) sends out more with an active misrecognition. The method of claim 8, wherein the method uses the UDS diagnostic service "Control Communication - disable non-diagnostic communication".

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