JP2016188017A - Program rewriting device and program rewriting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a program rewriting device and a program rewriting method capable of facilitating program rewriting.SOLUTION: A rewriting control unit of a program rewriting device causes intercommunication to be stopped and storage of a DTC to be prohibited in all of ECUs before program rewriting of each object ECU. When the continuous program rewriting in all the object ECUs is finished, the rewriting control unit cancels stop of intercommunication and storage prohibition of the DTC after confirming stop of all the object ECUs. Then, the rewriting control unit confirms whether or not version information from the object ECU is the latest version.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a program rewriting apparatus and a program rewriting method which are connected to a network of an electronic control device (hereinafter referred to as “ECU”) in the vehicle from the outside of the vehicle, select an ECU requiring program rewriting, and perform program rewriting. About.

  Many recent ECUs are equipped with a lot of ECUs, but the version of a program may be upgraded in response to a partial improvement in control specifications. In that case, the program may need to be rewritten for a plurality of related ECUs.

  Incidentally, many of the plurality of ECUs mounted on the vehicle have a function of monitoring each other for abnormality by communication. For this reason, when rewriting a program of one ECU, a communication abnormality occurring between the ECU to be rewritten and another ECU is judged as a failure in addition to a write request from an external program rewriting device. It is necessary to stop the fault diagnosis so as not to Furthermore, after rewriting, in order to release this stop, a restart operation is required to turn on the vehicle after turning off the ignition switch of the vehicle.

  Therefore, in a rewriting operation at a store or the like that maintains a vehicle, a plurality of rewriting target ECUs corresponding to one rewriting are sequentially rewritten one by one, and each ECU is rewritten to turn off the ignition switch and A very time-consuming work to perform the re-on operation was performed.

  On the other hand, as in Patent Document 1, rewrite data of a plurality of ECUs to be rewritten is obtained via a medium such as a CD-ROM or a mobile communication network, and a plurality of ECUs that perform cooperative control with each other. It is also considered to restart the plurality of ECUs collectively after rewriting each.

JP 2012-091755 A

  In the method of Patent Document 1, the rewriting work itself can be easily performed. However, it is necessary to create a rewrite order specification in advance in consideration of data such as identification information of a plurality of ECUs to be rewritten, program compatibility information, and combinations of target ECUs for cooperative control. For this reason, it takes time and effort to create data each time rewriting is performed.

  In addition, since the amount of data such as programs is large, it is necessary to provide set information for checking whether the data is correct or normal. Furthermore, when rewriting is failed in some ECUs among the ECUs to be rewritten, it is necessary to consider the rewriting order in consideration of the normal rewriting end part when performing rewriting again. For this reason, it may take a lot of time to repair.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide a program rewriting apparatus and a program rewriting method capable of easily performing program rewriting.

  A program rewriting device according to the present invention includes a network connection unit that connects to the network of an electronic control device (hereinafter referred to as “ECU”) in the vehicle from the outside of the vehicle, and a plurality of ECUs that require program rewriting (hereinafter referred to as “targets”). ECU ”) and a rewrite control unit that rewrites the program, and the rewrite control unit prohibits mutual communication from being stopped and failure code storage prohibited for each of the ECUs. The program rewriting operation in all the target ECUs is performed in order by performing the program rewriting operation on the target ECUs in a state where the requested stop / prohibition request signal is transmitted and the stop / prohibition request signal is transmitted. After the operation is completed, an operation confirmation signal is transmitted to each of the target ECUs, and there is no response to the operation confirmation signal. When the stop of all the target ECUs is detected, the transmission of the stop / prohibition request signal is terminated, and then a version information request signal for requesting the version information of the installed program is transmitted to the target ECU. Whether the version information received from the target ECU is the latest version is confirmed.

  According to the present invention, before rewriting the program, the mutual communication in all the ECUs is stopped and the failure code is prohibited to be stored. Further, when the continuous program rewriting in all the target ECUs is completed, after confirming the stop of all the target ECUs, the suspension of mutual communication and the prohibition of storing the fault codes are canceled. Thereafter, a version information request signal for requesting version information of the installed program is transmitted to the target ECU, and the completion of the program rewriting is confirmed based on the version information received from the target ECU.

  Therefore, the operation for restarting the target ECU (restart operation) is collectively performed after the continuous program rewriting of all the target ECUs, so that it is possible to greatly reduce the work burden on the operator. Become. Therefore, even when a program rewriting for a vehicle on the market is performed by a maintenance company such as a dealer, an appropriate rewriting operation can be easily performed.

  The rewrite control unit sequentially transmits the operation confirmation signal to each of the target ECUs after the completion of the program rewriting operation in all the target ECUs, and all of the responses have no response to the operation confirmation signals. The stop of the target ECU may be detected. As a result, it is easier to make a decision as it only detects the stop of the rewritten ECU as compared to the case where the operation confirmation signal is sent to all rewritable ECUs (target ECUs) at once. The time required for the process can be shortened. In addition, since the target ECU that has performed the rewriting operation is detected as having no response to the operation confirmation signal, and the subsequent processing is performed, each target ECU can be reliably restarted.

  The rewrite control unit displays on the display unit an off operation request for requesting an off operation of the power source for the ECU in the vehicle after the program rewriting operation for all the target ECUs is completed, After detecting the stop of the ECU and finishing the transmission of the stop / prohibition request signal, a re-on operation request for requesting a re-on operation of the power source for the ECU may be displayed on the display unit. Thus, in order to make a re-on operation request, it is necessary to confirm that all the target ECUs are turned off. For this reason, even when there are a large number of target ECUs or there are target ECUs that take a long time to power off, it is possible to instruct a restart operation after powering off all target ECUs reliably. Become.

  The program rewriting device includes an order database in which priority order of rewriting is stored in advance in correspondence with identification symbols of all the rewritable ECUs mounted on the vehicle, and a change target of the vehicle requiring program rewriting. For each operation, a rewrite candidate information database for storing a combination of an identification symbol of a rewrite candidate ECU that is a candidate for the target ECU and the latest version information of a program installed in the rewrite candidate ECU as rewrite candidate information, and a rewrite program are stored. The rewriting control unit reads out the current version information read from the rewritable ECUs included in the network in pairs with the identification symbols of the ECUs and the current version information of the installed programs. Information and the latest version corresponding to the current version information. The version information is compared, the rewrite candidate ECU paired with the current version information that does not match the latest version information is extracted as the target ECU, and the extracted target ECU is stored in the order database. The program rewriting operation may be continuously executed in the priority order.

  According to the present invention, program rewriting is performed in a priority order corresponding to combinations of ECUs (target ECUs) that need to be rewritten in each change target operation of the vehicle. For this reason, it becomes possible to perform the program rewriting in the optimal order for the vehicle.

  Further, according to the present invention, for the target ECU that is the rewriting candidate ECU whose current version information and the latest version information do not match, the rewriting to the latest version program is continuously executed according to the priority order for each operation to be changed. To do. For this reason, only the rewriting candidate ECU that needs to be rewritten is rewritten, so that the rewriting work can be performed efficiently.

  According to the above, even when a maintenance company such as a dealer performs rewriting of a program for vehicles on the market, the maintenance company (operator) does not mistakenly select the target ECU. In addition, it is possible to reduce the work load for specifying the rewriting order, and it is possible to easily perform appropriate rewriting work.

  In addition, even if there is a target ECU that has failed to be rewritten during program rewriting, by performing the rewriting operation again, the target ECUs for which rewriting has not been completed can be performed except for the target ECU that has already been rewritten. Rewriting can be performed.

  A program rewriting method according to the present invention includes a network connection unit that connects to a network of an electronic control device (hereinafter referred to as “ECU”) in the vehicle from the outside of the vehicle, and a plurality of ECUs that require program rewriting (hereinafter referred to as “target”). The program rewriting apparatus includes a rewrite control unit that selects and rewrites the program by selecting the ECU, and the rewrite control unit is configured to stop mutual communication with respect to each of all the ECUs. Sending a stop / prohibition request signal requesting prohibition of storage of a fault code, in a state where the stop / prohibition request signal is being transmitted, sequentially performing the program rewrite operation on the target ECU, and After completion of the program rewriting operation in the ECU, an operation confirmation signal is transmitted to each of the target ECUs When the stop of all the target ECUs is detected when there is no response to the operation confirmation signal, the transmission of the stop / prohibition request signal is terminated, and then the version information of the installed program for the target ECU A version information request signal for requesting is sent to check whether or not the version information received from the target ECU is the latest version.

  According to the present invention, it is possible to easily perform program rewriting of a plurality of the target ECUs.

It is a schematic structure figure showing simply a program rewriting system containing a program rewriting device concerning one embodiment of the present invention. It is the figure which described notionally the structure of the memory | storage part in the said embodiment. It is a flowchart which performs program rewriting in the said embodiment. It is a flowchart (details of S4 of Drawing 3) of rewriting candidate ECU combination selection processing in the above-mentioned embodiment. It is a flowchart (detail of S8 of FIG. 3) of the program continuous rewriting process in the said embodiment. It is a figure for demonstrating the communication state and operation | movement state of the said program rewriting apparatus and each electronic control unit in the program continuous rewriting process and rewriting completion confirmation process in the said embodiment. It is a flowchart (detail of S9 of FIG. 3) of the rewriting completion confirmation process in the said embodiment. In a comparative example, it is a figure which shows an example of a mode that the power-off of each object electronic controller is confirmed in order. In the said embodiment, it is a figure which shows an example of a mode that the power-off of each object electronic control apparatus is confirmed in order.

A. One Embodiment [A1. Configuration of Program Rewriting System 10]
(A1-1. Overall configuration)
FIG. 1 shows a program rewriting system 10 (hereinafter also referred to as “rewriting system 10” or “system 10”) including a program rewriting device 12 (hereinafter also referred to as “rewriting device 12”) according to an embodiment of the present invention. It is a schematic block diagram shown simply. The system 10 includes a vehicle 14 in addition to the rewriting device 12. In FIG. 1, one rewriting device 12 and one vehicle 14 are shown, but a plurality of them can be provided.

(A1-2. Program rewriting device 12)
(A1-2-1. Overall configuration of program rewriting device 12)
The rewriting device 12 is stored in the ECU to be rewritten among the first to tenth electronic control devices 62a to 62j (hereinafter referred to as “first to tenth ECUs 62a to 62j” or “ECUs 62a to 62j”) of the vehicle 14. Rewrite (or update) the program. Below, ECU62a-62j is named ECU62 generically. The program rewriting target ECU 62 is also referred to as a “target ECU 62 tar”. The program stored in the ECU 62 is also referred to as “installed program Pi” or “program Pi”.

  As illustrated in FIG. 1, the rewriting device 12 includes a signal input / output unit 20, an operation input unit 22, a calculation unit 24, a storage unit 26, and a display unit 28.

  The signal input / output unit 20 (network connection unit) inputs and outputs signals to and from the vehicle 14. The signal input / output unit 20 includes a data cable 30 and a data link connector 32 (hereinafter also referred to as “DLC 32”), and is connected to the communication network 60 in the vehicle 14 from the outside of the vehicle 14.

  The operation input unit 22 receives an operation input from a user (or a worker) of the rewriting device 12. In the present embodiment, the operation input unit 22 functions as a change target operation selection unit that selects the change target operation Otar of the vehicle 14. The change target operation Otar mentioned here refers to, for example, an operation performed on the vehicle 14 in order to improve the performance (fuel consumption, turning performance, etc.) of the vehicle 14 or to solve problems in the vehicle 14.

  The calculation unit 24 (rewrite control unit) controls each unit of the rewriting device 12 and also controls program rewriting for the target ECU 62tar of the vehicle 14. The calculation unit 24 includes, for example, a central processing unit (CPU). Details of the operation of the calculation unit 24 will be described later with reference to FIGS.

  The storage unit 26 includes a volatile memory and a non-volatile memory (not shown), and various programs executed by the arithmetic unit 24, various data, and a rewrite program (hereinafter also referred to as “rewrite program Pr” or “program Pr”). .) Is memorized. Hereinafter, the installed program Pi and the rewrite program Pr are collectively referred to as a program P.

  The display unit 28 displays a display screen related to program rewriting and the like. The operation input unit 22 and the display unit 28 may be integrated by using the display unit 28 as a touch panel.

(A1-2-2. Storage unit 26)
FIG. 2 is a diagram conceptually describing the configuration of the storage unit 26 in the present embodiment. In FIG. 2, only one ECU 62 is shown, and the other ECUs 62 are not shown. As shown in FIGS. 1 and 2, the storage unit 26 includes a program ID history database 50 (hereinafter also referred to as “program ID history DB 50”), a rewrite order database 52 (hereinafter also referred to as “order DB 52”), Rewrite combination information database 54 (hereinafter also referred to as “combination DB 54”), rewrite program database 56 (hereinafter also referred to as “program DB 56”), and program rewrite list 58 (hereinafter referred to as “rewrite list 58” or “list 58”). ").

  The program ID history DB 50 stores the change history of the identification information of the program P (hereinafter referred to as “program ID”) together with the identification information of the ECU 62 (hereinafter referred to as “ECU ID”) and the date (see FIG. 2). In the present embodiment, the program ID includes a program name and version information Iver. For example, the program ID is expressed as “XXXX.001”. Among these, “XXXX” corresponds to the program name, and “001” is the version information Iver. The ECU ID also means identification information (system ID) of a lower system controlled by each ECU 62.

  The order DB 52 is also referred to as priority order information Ipo (hereinafter also referred to as “order information Ipo”) indicating the priority order Op of rewriting in correspondence with identification information (ECU ID) of all rewritable ECUs 62 mounted on the vehicle 14. ) In advance (see FIG. 2). The order information Ipo of the present embodiment includes the priority order Op of the ECU 62 mounted on the plurality of vehicle types 14. The priority order Op of the present embodiment is indicated by the arrangement order of ECU IDs. For this reason, the order information Ipo is, for example, given to the priority order Op of the ECU 62 (the ECU ID is XX, YY, ZZ in FIG. 2, for example) mounted on the vehicle 14 of the first vehicle type and the vehicle 14 of the second vehicle type. The priority order Op of the mounted ECUs 62 (in FIG. 2, the ECU IDs are AA, BB, CC, DD, for example) is shown collectively. Alternatively, the order information Ipo may indicate only the priority order Op of the ECU 62 mounted on the vehicle 14 of a single vehicle type.

  In the example of FIG. 2, the arrangement order indicates the priority order Op (hereinafter also referred to as “rewrite priority order Op” or “rewrite order Op”). For example, “1: ZZ, 2: YY, 3: XX”. It is also possible to include the rewrite order Op in the order information Ipo.

  The rewrite order Op is an order in which the target ECU 62tar is rewritten. Further details of the rewrite order Op will be described later in connection with step S41 of FIG.

  The combination DB 54 (rewrite candidate database) stores a combination of rewrite candidate ECUs 62 (hereinafter referred to as “rewrite candidate ECU 62 can” or “candidate ECU 62 can”) for each change target operation Otar of the vehicle 14. More specifically, the combination DB 54 has a combination number Nset, a change target operation Otar, a date, an identification symbol of the candidate ECU 62can (hereinafter also referred to as “rewrite candidate ECU ID” or “candidate ECU ID”), and a candidate. A program ID corresponding to the ECU 62can (hereinafter also referred to as “rewrite candidate program ID” or “candidate program ID”) is stored in combination (see FIG. 2). The candidate program ID includes a program name and version information Iver. Hereinafter, the information stored in the combination DB 54 is also referred to as rewrite candidate information Ican.

  The rewrite program DB 56 stores a rewrite program Pr. The program DB 56 of this embodiment stores the latest version of the rewrite program Pr having the same program name. In FIG. 2, programs P1 and P2 are shown as the rewrite program Pr. The rewrite list 58 is a list (storage area) temporarily created for program rewriting. A method of using the list 58 will be described later with reference to the flowcharts of FIGS. 4, 5, and 7.

(A1-3. Vehicle 14)
As shown in FIG. 1, the vehicle 14 includes a communication network 60 (hereinafter also referred to as “in-vehicle network 60” or “network 60”). The network 60 includes a plurality of ECUs 62 a to 62 j connected by a communication line 64. The network 60 is connected to the program rewriting device 12 via a data link connector 66 (hereinafter also referred to as “DLC 66”).

  Each of the ECUs 62 a to 62 j controls each part of the vehicle 14. Among the plurality of ECUs 62a to 62j, the first ECU 62a has a gateway function. That is, the first ECU 62a is a network node for connecting the network 60 to the network of the program rewriting device 12 having a different protocol. Hereinafter, the first ECU 62a is also referred to as a gateway ECU 62a. In FIG. 1, only one gateway ECU 62a is shown, but a plurality of gateway ECUs 62a may be provided. Further, one or a plurality of gateway ECUs 62 a are not limited to positions as shown in FIG. 1, and may be disposed at any position in the network 60.

  The second to tenth ECUs 62b to 62j include, for example, an engine electronic control device (hereinafter referred to as “ENG ECU”), an antilock brake system electronic control device (hereinafter referred to as “ABS ECU”), and an auxiliary restraint system electronic control. A device (hereinafter referred to as “SRS ECU”) and an immobilizer electronic control device are included. The ENG ECU controls the output of an engine (not shown). The ENG ECU is connected to an engine speed sensor (not shown) that detects the engine speed Ne [rpm] and a vehicle speed sensor (not shown) that detects the vehicle speed V [km / h] of the vehicle 14. Yes. The ABS ECU controls a brake system (not shown). The SRS ECU controls an airbag (not shown). The immobilizer ECU controls an immobilizer device (not shown).

  Each of the ECUs 62 a to 62 j performs data communication with each other via the communication line 64. More specifically, each of the ECUs 62a to 62j receives another ECU 62 (for example, ABS ECU) based on communication data (for example, engine speed Ne or vehicle speed V data) from a specific ECU 62 (for example, ENG ECU). , SRS ECU and immobilizer ECU) perform cooperative control of the vehicle 14. Furthermore, each of the ECUs 62a to 62j performs a fault diagnosis (detection of communication data abnormality) with each other.

  The second to fourth ECUs 62b, 62c, 62d form a first lower network 68a. The fifth to seventh ECUs 62e, 62f, 62g form a second lower network 68b. The eighth to tenth ECUs 62h, 62i, 62j form a third lower network 68c. The first to third lower networks 68a to 68c constitute, for example, a CAN (Controller Area Network). The CAN here can be, for example, a high-speed CAN. In addition, although the example of ten ECU62a-62j is shown in the example of FIG. 1, the number of ECU62 is not restricted to this, For example, the value in any one of 3-200 may be sufficient.

  As shown in FIG. 1, the first ECU 62 a includes a signal input / output unit 70, a calculation unit 72, and a storage unit 74. Although not shown in FIG. 1, the second to tenth ECUs 62b to 62j have the same configuration as the first ECU 62a. However, specific specifications differ between the first to tenth ECUs 62a to 62j.

  Each of the ECUs 62a to 62j is turned on and off by an ignition switch 80 (hereinafter referred to as “IGSW 80”) as a start switch. More specifically, each of the ECUs 62a to 62j is connected to a battery 82 (power storage device) via a power line (not shown) and an IGSW 80 disposed on the power line.

  The IGSW 80 of the present embodiment is a rotary type, and can select the positions of “off”, “ACC” (accessory), and “on” from the left side toward an instrument panel (not shown). Further, when the IGSW 80 is further turned to the right (clockwise) from the “ON” position, the IGSW 80 becomes the “ST” (engine start) position, and the engine is started.

  In the present embodiment, when the IGSW 80 is in the “ACC” and “ON” positions, power is supplied from the battery 82 to each ECU 62. When the IGSW 80 is in the “off” position, the power supply from the battery 82 to each ECU 62 is basically stopped.

  When the vehicle 14 has a so-called smart start function, the IGSW 80 may be a push switch used for the so-called smart start function.

  The first to tenth ECUs 62 a to 62 j store a failure code (DTC) as a failure history in its own storage unit 74 when an abnormality occurs in connection with its own operation. The gateway ECU 62 also stores the DTC in the storage unit 26 even when an abnormality occurs in connection with the communication with the second to tenth ECUs 62b to 62j. The failure history here includes a communication failure history (hereinafter referred to as “communication failure history”) and other failure history (hereinafter also referred to as “non-communication failure history”). The communication failure history and the non-communication failure history are collectively referred to as a general failure history.

  For example, when a disconnection occurs before the eighth ECU 62h (point 84 in FIG. 1), both the gateway ECU 62a and the eighth ECU 62h store the DTC in the storage unit 74. However, the eighth ECU 62h cannot communicate with the gateway ECU 62a in a state where the disconnection has occurred. For this reason, the rewriting device 12 cannot read out the DTC stored in the eighth ECU 62h. Further, even when the program rewriting is interrupted in each of the ECUs 62a to 62j, each of the ECUs 62a to 62j stores the DTC as a communication failure history in its own storage unit 74.

[A2. Program rewriting]
Next, rewriting of the mounted program Pi stored in the target ECU 62tar in the present embodiment will be described.

(A2-1. Advance preparation)
Before rewriting a program for a specific change target operation Otar, the user (or worker) of the rewrite device 12 stores data corresponding to the change target operation Otar in the storage unit 26 of the rewrite device 12. More specifically, the user stores a plurality of rewrite programs Pr corresponding to the specific change target operation Otar in the program DB 56 (rewrite program database).

  Further, the user stores the program ID (including version information Iver) and the like of each rewrite program Pr in the program ID history DB 50 in association with the change target operation Otar (see FIG. 2). Further, the user stores the priority order information Ipo of the rewriting program Pr in the order DB 52 (see FIG. 2). Furthermore, the user stores the combination number Nset, candidate ECU ID, candidate program ID, and the like of the rewriting program Pr in the combination DB 54 (see FIG. 2). For example, the DLC 32 of the rewriting device 12 is connected to a personal computer (not shown), and the data is copied from the personal computer to the storage unit 26.

  The data to be copied to the rewriting device 12 is created by the administrator of the program rewriting system 10 and stored in an external server (not shown). Data stored in the external server is downloaded to the personal computer. When the rewriting device 12 has a communication function with an external server, the rewriting device 12 can also acquire data directly from the external server.

(A2-2. Actual rewriting)
(A2-2-1. Overall flow during rewriting)
FIG. 3 is a flowchart for rewriting a program in the present embodiment. The processing of FIG. 3, FIG. 4, FIG. 5, and FIG. 7 to be described later is mainly executed by the arithmetic unit 24 (rewrite control unit) of the rewrite device 12. In step S1 of FIG. 3, when the user turns on a power switch (not shown) of the rewriting device 12, the rewriting device 12 is activated. In step S <b> 2, the rewriting device 12 displays a selection menu on the display unit 28. The selection menu includes, for example, continuous rewriting of program P, individual rewriting of program P, and the like. The continuous rewriting is a menu for continuously rewriting the program Pi of the plurality of target ECUs 62tar, and the individual rewriting is a menu for rewriting the program Pi of the single target ECU 62tar.

  When continuous rewriting of program P is selected from the selection menu (S3: YES), continuous rewriting of program P is performed in steps S4 to S10. When a menu other than continuous rewriting of the program P is selected (S3: NO), the menu is performed (in FIG. 3, the steps corresponding to the menu are not shown).

  In step S4, the rewrite device 12 executes a process of selecting a combination of the rewrite candidate ECUs 62can (hereinafter referred to as “rewrite candidate ECU combination selection process” or “combination selection process”). Details of step S4 will be described later with reference to FIG. In step S <b> 5, the rewrite device 12 determines whether or not a combination of selectable rewrite candidate ECUs 62 can exist as a result of the combination selection process. When there is a selectable combination (S5: YES), the process proceeds to step S6.

  In step S <b> 6, the rewriting device 12 displays selectable combinations on the display unit 28. When there is only one selectable combination, the one combination is displayed. Even if the combination is determined to be selectable in the rewrite candidate ECU combination selection process, if the combination includes the ECU 62 for which rewrite prohibition is set, the rewrite device 12 does so. May be displayed on the display unit 28.

  When there are a plurality of combinations that can be selected, the rewriting device 12 may display only the newest date stored in the combination DB 54. Thereby, when different version information Iver regarding the same ECU 62 is included in each combination, a newer version of the program Pr can be rewritten first. As a result, rewriting of an older version of the program Pr can be omitted.

  In step S <b> 7, the rewriting device 12 determines whether any combination has been selected by the user via the operation input unit 22. If any combination is selected (S7: YES), the process proceeds to step S8. When the end of continuous rewriting is selected without selecting any combination (S7: NO), the process proceeds to step S10.

  In step S8, the rewriting device 12 continuously performs program rewriting for each ECU 62 (target ECU 62tar) that actually performs program rewriting from among a plurality of rewrite candidate ECUs 62can included in the selected combination (hereinafter referred to as “program continuous rewriting”). Process "). Details of step S8 will be described later with reference to FIG. In step S <b> 9, the rewriting device 12 executes processing for confirming completion of program rewriting (hereinafter referred to as “rewriting completion confirmation processing”). Details of step S9 will be described later with reference to FIG. After step S9, the process returns to step S5.

  If there is no combination of rewrite candidate ECUs 62can that can be selected in step S5 (S5: NO), in step S10, the rewriting device 12 deletes the rewriting list 58 temporarily created for rewriting the program. The continuous rewriting of the program P is finished. The list 58 will be described later in step S30 in FIG.

(A2-2-2. Rewrite candidate ECU combination selection process (details of S4 in FIG. 3))
FIG. 4 is a flowchart of the rewrite candidate ECU combination selection process in this embodiment (details of S4 in FIG. 3). In step S <b> 21 of FIG. 4, the rewriting device 12 establishes a link with the in-vehicle network 60. In establishing the link, the rewriting device 12 waits for a predetermined time until the session in each of the ECUs 62a to 62j is completed.

  In step S22, the rewriting device 12 requests the DTC from the gateway ECU 62a. In response to the request, if there is a DTC stored in its storage unit 74, the gateway ECU 62a transmits the DTC to the rewriting device 12. If there is no DTC, the gateway ECU 62a replies that no DTC is recorded. Alternatively, when there is no DTC, the gateway ECU 62a may not respond.

  In step S23, the rewriting device 12 determines whether or not there is a communication failure in the gateway ECU 62a based on the response from the gateway ECU 62a. For example, when the rewriting device 12 receives the DTC from the gateway ECU 62a, the rewriting device 12 determines whether or not the DTC is related to the communication failure history. Alternatively, when the gateway ECU 62a outputs an answer that the DTC is not recorded, the rewriting device 12 determines whether or not the gateway ECU 62a has a communication failure based on whether or not there is any response from the gateway ECU 62a. It is also possible to do.

  When there is no communication failure in the gateway ECU 62a (S23: YES), in step S24, the rewriting device 12 requests DTC from other ECUs 62 (second to tenth ECUs 62b to 62j) other than the gateway ECU 62a. In response to the request, the second to tenth ECUs 62b to 62j transmit the DTC stored in their own storage unit 74 to the rewrite device 12. If there is no DTC, the second to tenth ECUs 62b to 62j respond that the DTC is not recorded. Alternatively, the second to tenth ECUs 62b to 62j may not respond when the DTC is not recorded.

  In step S25, the rewriting device 12 determines whether or not there is a communication failure in the other ECU 62 (second to tenth ECUs 62b to 62j) based on a response from the other ECU 62 (second to tenth ECUs 62b to 62j). To do. This determination can be performed in the same manner as in step S23. When there is no communication failure in the other ECUs 62 (second to tenth ECUs 62b to 62j) (S25: YES), the process proceeds to step S27.

  If there is a communication failure in the gateway ECU 62a in step S23 (S23: NO), or if there is a communication failure in any of the ECUs 62 (second to tenth ECUs 62b to 62j) other than the gateway ECU 62a in step S25 (S25: NO), step In S26, the rewrite device 12 causes the display unit 28 to display an error message notifying the communication failure.

  In step S27, the rewrite device 12 receives the ECU ID (system ID) and the current program ID (hereinafter “current program ID”) from all the ECUs 62 (first to tenth ECUs 62a to 62j) that are included in the network 60 and can be rewritten. Is also read.). The current program ID includes a program name and current version information Iver (hereinafter also referred to as “current version information Iver”).

  In subsequent steps S28 to S30, the change target operation Otar required in the vehicle 14 is specified. That is, in step S28, the rewrite device 12 extracts the latest program ID (hereinafter also referred to as “latest program ID”) corresponding to each of the current program IDs read in step S28 from the program ID history DB 50. Then, the rewriting device 12 holds the extracted latest program ID in combination with the ECU ID and the current program ID.

  In the present embodiment, one ECU 62 has only one program Pi (see FIG. 2). For this reason, when extracting the latest program ID (S28), the latest program ID may be specified using the ECU ID instead of the current program ID.

  In step S29, the rewriting device 12 extracts the combination of candidate program IDs and the combination number Nset (in other words, the operation to be changed Otar) that completely matches a part or all of the extracted latest program ID combinations from the combination DB 54 and holds them. To do. Thereby, the candidate of one or several change object operation | movement Otar required in the vehicle 14 can be specified.

  In step S <b> 30, the rewriting device 12 identifies the change target operation Otar that needs to be rewritten in the vehicle 14 and registers it in the list 58.

  That is, the rewriting device 12 determines, for each combination (change target operation Otar), whether or not there is a current program ID that does not match the latest program ID even though the program names are the same. Then, the rewriting device 12 extracts a combination (change target operation Otar) in which a current program ID that does not match the latest program ID exists as a combination that requires program rewriting (change target operation Otar). The rewriting device 12 registers information (combination number Nset, ECU ID, current program ID, and latest program ID) regarding the extracted combination in the list 58. The combinations registered in the list 58 are selectable combinations in step S5 of FIG.

  On the other hand, for combinations where there is no current program ID that does not match the latest program ID, it is possible to determine that program rewriting has been completed and program rewriting is not required. For this reason, the rewriting device 12 deletes (or terminates) the information related to the combination in which there is no current program ID that does not match the latest program ID. If there is no combination to be registered in the list 58, the rewriting device 12 causes the display unit 28 to display that effect.

(A2-2-3. Program continuous rewrite processing (details of S8 in FIG. 3))
FIG. 5 is a flowchart (details of S8 in FIG. 3) of the program continuous rewriting process in the present embodiment. FIG. 6 is a diagram for explaining communication states and operation states of the rewrite device 12 and each ECU 62 in the program continuous rewrite process and the rewrite completion confirmation process in the present embodiment. As described above, the program continuous rewriting process (S8 in FIG. 3) is performed after the user selects one of the combinations that can be selected in step S7 in FIG. In FIG. 6, the actual continuous program rewriting (program continuous rewriting (S48 in FIG. 5 and the like)) of the program continuous rewriting processing is executed between time points t2 and t3, and the rewriting completion confirmation processing is performed at time points t3 to t3. It is executed during t6.

  In step S41 of FIG. 5, the rewrite device 12 specifies the rewrite priority order Op corresponding to the combination (or combination number Nset or change target operation Otar) selected by the user using the priority order information Ipo of the order DB 52.

As a rule (or standard) for setting the rewrite order Op in the order DB 52, for example, the following is used.
(Rule 1) The gateway ECU 62a (high-order ECU) is rewritten later than the other ECUs 62b to 62j (low-order ECU).
(Rule 2) The order of rewriting of the ECU 62 (data providing ECU) that outputs data used for rewriting of the other ECU 62 is set behind the other ECU 62.

  Regarding rule 1, if the program P of the gateway ECU 62a is rewritten first, the gateway ECU 62a stops the communication mediation function until it is restarted. For this reason, the gateway ECU 62a is rewritten later.

  Regarding rule 2, if the program P of the data providing ECU is rewritten first, the data providing ECU stops providing data necessary for rewriting the other ECUs 62 until restarting. For this reason, the data providing ECU is rewritten later. As a case related to rule 2, for example, as a rewriting start condition of another ECU 62, the vehicle speed V is set to zero [km / h], and the vehicle speed V is set from the data providing ECU to another ECU 62. May be provided.

  In step S42 of FIG. 5, the rewriting device 12 rearranges the combinations of the candidate ECU ID, the current program ID, and the latest program ID using the rewriting order Op specified in step S41. The combination of the candidate ECU ID, the current program ID, and the latest program ID before rearrangement is registered in the list 58 through steps S27 to S30 in FIG.

  In step S43, the rewriting device 12 assigns a reference number Nref to each of the rearranged candidate ECU ID, current program ID, and latest program ID combination. The reference number Nref indicates the rewrite order for each combination.

  In step S44, the rewrite device 12 resets the rewrite target number Ntar (hereinafter also referred to as “target number Ntar”) indicating the reference number Nref in which the rewrite order has come to zero. In step S45, the rewrite device 12 adds 1 to the current value of the rewrite target number Ntar to obtain a new target number Ntar. In addition, when the program rewriting for another ECU 62 is started after the program rewriting for one ECU 62 is completed, the rewriting device 12 is predetermined until the session in the other ECU 62 ends before or after step S44. Wait for time.

  In step S46, the rewriting device 12 specifies the current program ID (hereinafter also referred to as “target program ID”) corresponding to the candidate ECU 62can having the reference number Nref that matches the rewriting target number Ntar. In step S47, the rewriting device 12 compares the target program ID having the same program name with the latest program ID, and confirms whether or not they match. If the two match (S47: YES), the installed program Pi is already the latest version. In this case, the program proceeds to step S49 without rewriting the program with respect to the candidate ECU 62can having the reference number Nref that matches the rewrite target number Ntar.

  On the other hand, if the two do not match (S47: NO), the installed program Pi is not the latest version, and the installed program Pi needs to be rewritten. In this case, the candidate ECU 62can is the target ECU 62tar. In step S48, the rewriting device 12 executes program rewriting on the target ECU 62tar having the reference number Nref that matches the rewriting target number Ntar.

  Furthermore, the rewriting device 12 starts periodic transmission of a network communication stop request signal Sstp (hereinafter also referred to as “communication stop request signal Sstp” or “stop request signal Sstp”) to each ECU 62. The stop request signal Sstp is a signal for requesting the ECUs 62a to 62j (the target ECU 62tar and the other ECUs 62) to stop the mutual communication between the ECUs 62 and prohibit the DTC storage. The transmission of the stop request signal Sstp is started before the start of program rewriting (see FIG. 6).

  The stop request signal Sstp is transmitted at a predetermined interval (for example, every 2 to 4 seconds). Receiving the stop request signal SStp, each of the ECUs 62a to 62j stops communication in the network 60 and storage and output of communication-related DTC for a predetermined period (for example, any one of 4 to 10 seconds). Thus, while the rewriting device 12 continues to transmit the stop request signal Sstp, the ECUs 62 other than the target ECU 62tar continue to stop network communication and do not store communication-related DTCs. The stop request signal Sstp may be requested to stop the network communication until the network communication stop cancellation request signal (release request signal Sfin) is transmitted.

  Note that in step S48, the target ECU 62tar that has finished rewriting the program is not restarted. The restart of the target ECU 62tar is performed in a rewrite completion confirmation process (S51 to S55 in FIG. 7 described later).

  FIG. 6 shows a state in which the rewriting device 12 periodically transmits a communication stop request signal Sstp between time points t1 to t3. The ECUs 62a to 62j that have received the stop request signal SStp enter a communication stop state in which mutual communication is stopped. However, the target ECU 62tar for which program rewriting is actually performed can communicate with the rewriting device 12 for program rewriting.

  In step S49, the rewrite device 12 determines whether or not the rewrite target number Ntar is equal to the maximum value Nref_max of the reference number Nref. When the rewrite target number Ntar is not equal to the maximum value Nref_max (S49: NO), there is a candidate ECU 62can that has not finished checking whether the installed program Pi is the latest version. Therefore, the process returns to step S45. When the rewrite target number Ntar is equal to the maximum value Nref_max (S49: YES), all candidate ECUs 62can in the combination have finished checking whether the installed program Pi is the latest version. Therefore, the rewriting device 12 finishes the program continuous rewriting process, and proceeds to the rewriting completion confirmation process (S9 in FIG. 3, FIG. 7).

(A2-2-4. Rewriting completion confirmation process (details of S9 in FIG. 3))
(A2-2-4-1. Overall flow)
FIG. 7 is a flowchart (details of S9 in FIG. 3) of the rewrite completion confirmation process in the present embodiment. In step S51, the rewriting device 12 causes the display unit 28 to display a power-off request for requesting the user to turn off the power of each target ECU 62tar. In the power-off request in this embodiment, the user is requested to turn off the IGSW 80. Note that the communication stop request signal Sstp has been transmitted periodically from the time of step S48 in FIG.

  In step S52, the rewriting device 12 checks whether or not each target ECU 62tar is powered off. Specifically, the rewriting device 12 transmits the first operation confirmation signal Scnf1 to all the target ECUs 62tar. Then, the rewriting device 12 confirms that each target ECU 62tar is powered off when there is no response to the first operation confirmation signal Scnf1. As the first operation confirmation signal Scnf1, for example, a battery voltage request signal for requesting reading of the voltage of the battery 82 can be used. Note that this determination can also be made by outputting an on / off signal of the IGSW 80 to the rewriting device 12. In the present embodiment, whether or not the power is off is confirmed in order for each target ECU 62tar (details will be described later with reference to FIGS. 8 and 9).

  If any target ECU 62tar is not powered off (S52: NO), the process returns to step S52. However, if any of the target ECUs 62tar does not turn off even after the predetermined period has elapsed, the rewriting device 12 may display the fact on the display unit 28. When all the target ECUs 62tar are powered off (S52: YES), the process proceeds to step S53.

  In step S53, the rewriting device 12 ends the transmission of the communication stop request signal Sstp to the ECUs 62a to 62j (time t4 in FIG. 6). In step S54, the rewriting device 12 causes the display unit 28 to display a power-on request for requesting the user to turn on the power of each target ECU 62tar. In the power supply re-on request in the present embodiment, the user is requested to turn on the IGSW 80 again.

  In step S55, the rewriting device 12 determines whether or not all the target ECUs 62tar are powered on (in other words, whether or not all the target ECUs 62tar are restarted). Specifically, the rewriting device 12 transmits the second operation confirmation signal Scnf2 to all the target ECUs 62tar. The rewriting device 12 confirms that each target ECU 62tar is turned on when there is a response to the second operation confirmation signal Scnf2.

  As the second operation confirmation signal Scnf2, a current program ID request signal Sreqpid (hereinafter also referred to as “ID request signal Sreqpid”) for requesting the current program ID of each target ECU 62tar can be used. As described above, the current program ID includes the program name and the current version information Iver. For this reason, the ID request signal Sreqpid also functions as a version information request signal. By using the ID request signal Sreqpid as the second operation confirmation signal Scnf2, it is possible to smoothly perform the process of step S56 described later. Note that the determination in step S56 can also be made by outputting an on / off signal of the IGSW 80 to the rewriting device 12.

  If any target ECU 62tar is not powered on (S55: NO), step S55 is repeated. That is, the rewriting device 12 continuously transmits the ID request signal Sreqpid to the target ECU 62tar that has not currently received the program ID. However, if any of the target ECUs 62tar does not turn on even after the predetermined period has elapsed, the rewriting device 12 may display that fact on the display unit 28. When all the target ECUs 62tar are powered on (S55: YES), the process proceeds to step S56.

  In step S56, the rewriting device 12 determines whether or not the current program IDs of all target ECUs 62tar match the latest program ID. In other words, the rewriting device 12 determines whether or not the current version information Iver and the latest version information Iver match the installed program Pi of each target ECU 62tar. Here, the latest program ID is registered in the list 58. In step S55, when confirmation of power-on of each target ECU 62tar is performed by means other than the ID request signal Sreqpid, the ID request signal Sreqpid is transmitted to each target ECU 62tar between steps S55 and S56, and each target ECU 62tar is sent. To obtain the current program ID.

  When the current program ID of all target ECUs 62tar matches the latest program ID (S56: YES), the rewriting device 12 displays the completion of rewriting on the display unit 28 in step S57, and then ends the rewriting completion confirmation process. . If the current program ID of any target ECU 62tar does not match the latest program ID (S56: NO), the rewriting device 12 causes the display unit 28 to display an error message to that effect in step S58.

(A2-2-4-2. Relationship between determination of whether each target ECU 62tar is powered off (S52 in FIG. 7) and display on display unit 28 (S51, S54))
As described above, in step S52 of FIG. 7, the power-off of each target ECU 62tar is sequentially confirmed. In this case, it can be reliably confirmed that each target ECU 62tar is powered off. On the other hand, since the time required for the confirmation is relatively long, if the time from when the IGSW 80 is turned off to when it is turned on again is short, it is not possible to determine that each target ECU 62tar is powered off. In that case, there is a possibility that it is not possible to proceed to Step S53 only by repeating Step S52 of FIG.

  Therefore, in the present embodiment, by using the display (S51, S54) on the display unit 28, it is possible to reliably determine that each target ECU 62tar is powered off. This point will be described more specifically with reference to FIGS.

  FIG. 8 is a diagram illustrating an example of how the target ECUs 62tar are sequentially confirmed to be turned off in the comparative example. In the comparative example (and the example of FIG. 9), the number of target ECUs 62tar is three. In the comparative example, the display (S51 and S54 in FIG. 7) on the display unit 28 in the present embodiment is not used. Instead, the user (or worker) of the rewriting device 12 obtains work information from a maintenance manual or the like. In the comparative example of FIG. 8, since the time from the OFF operation of the IGSW 80 to the re-ON operation by the user is short, the rewriting device 12 may determine that the third target ECU 62tar (for example, the first ECU 62a) has been powered off. Can not.

  That is, in FIG. 8, the rewriting device 12 starts determining whether or not the first target ECU 62tar (for example, the fourth ECU 62d) is powered off from the time point t11. When the user turns off the IGSW 80 at time t12, each target ECU 62tar is turned off. From time t12 to time t13, the rewriting device 12 determines the determination that the first target ECU 62tar is powered off. Next, the rewriting device 12 starts determining whether or not the second target ECU 62tar (for example, the seventh ECU 62g) is powered off. From time t13 to time t14, the rewriting device 12 finalizes the determination that the second target ECU 62tar is powered off.

  Next, the rewriting device 12 starts determining whether or not the third target ECU 62tar (for example, the first ECU 62a) is powered off. At time t15, the user turns on the IGSW 80. Thereby, all the three target ECUs 62tar are restarted. On the other hand, at time t15, the rewriting device 12 has not yet determined that the third target ECU 62tar is powered off. For this reason, the rewriting device 12 cannot proceed to step S53 of FIG. 7 because the third target ECU 62tar is not powered off.

  FIG. 9 is a diagram illustrating an example of how the target ECUs 62tar are sequentially confirmed to be turned off in the present embodiment. In the example of FIG. 9, the power supply re-on request (IGSW on request) is not displayed on the display unit 28 until it is determined that all the target ECUs 62 tar have been turned off. For this reason, it becomes possible to take sufficient time from the OFF operation of the IGSW 80 by the operator to the re-ON operation, and the rewriting device 12 determines that the third target ECU 62tar (for example, the first ECU 62a) has been powered off. be able to.

  That is, in FIG. 9, the rewriting device 12 starts determining whether or not the first target ECU 62tar (for example, the fourth ECU 62d) is powered off from the time point t21. At this time, the rewriting device 12 displays a power-off request on the display unit 28 (S51 in FIG. 7).

  When the user turns off the IGSW 80 at time t22, each target ECU 62tar is turned off. From time t22 to time t23, the rewriting device 12 finalizes the determination that the first target ECU 62tar is powered off. Next, the rewriting device 12 starts determining whether or not the second target ECU 62tar (for example, the seventh ECU 62g) is powered off. From time t23 to time t24, the rewriting device 12 finalizes the determination that the second target ECU 62tar is powered off.

  Next, the rewriting device 12 starts determining whether or not the third target ECU 62tar (for example, the first ECU 62a) is powered off. In the example of FIG. 9, the power-off request on the display unit 28 continues to be displayed on the display unit 28. For this reason, unlike the comparative example of FIG. 8, the user does not turn on the IGSW 80. Note that the rewriting device 12 may switch the display on the display unit 28 from the power-off request to the standby request at the time when it is determined that the first target ECU 62tar is powered off.

  From time t24 to time t25, the rewriting device 12 finalizes the determination that the third target ECU 62tar is powered off. Accordingly, the rewriting device 12 switches the display on the display unit 28 to a power-on request (S54 in FIG. 7). At time t26, the operator turns on the IGSW 80. Thereby, all the three target ECUs 62tar are restarted. When each target ECU 62tar is powered on (S55: YES in FIG. 7), the rewriting device 12 finishes displaying the power re-on request (time t27).

  As described above, in the example of FIG. 9, the rewriting device 12 can determine that all the target ECUs 62tar have been powered off, and thus can proceed to step S53 of FIG.

[A3. Effects in this embodiment]
According to the present embodiment as described above, before rewriting the program, the communication between all the ECUs 62a to 62j is stopped and the DTC storage is prohibited (S48 in FIGS. 6 and 5). When the continuous program rewriting in all the target ECUs 62tar (S8 in FIG. 3, FIG. 5) is completed, after confirming the stop of all the target ECUs 62tar (S52 in FIG. 7: YES), the network communication stop request signal Transmission of Sstp (stop / prohibition request signal) is stopped (S53). In addition, after stopping the transmission of the stop request signal Sstp, a current program ID request signal Sreqpid (version information request signal) for requesting the current version information Iver (version information of the installed program Pi) is transmitted to the target ECU 62tar (S55). . Further, the completion of the program rewriting is confirmed based on the current version information Iver received from the target ECU 62tar (S56).

  Therefore, the operation for restarting the target ECU 62tar (restarting operation) is collectively performed after the continuous program rewriting of all the target ECUs 62tar, so that it is possible to greatly reduce the work burden on the operator. Become. Therefore, even when the program rewriting for the vehicle 14 on the market is performed by a maintenance company such as a dealer, an appropriate rewriting operation can be easily performed.

  In the present embodiment, the calculation unit 24 (rewrite control unit) of the rewriting device 12 receives the first operation confirmation signal Scnf1 for each target ECU 62tar after the program rewriting (S8 in FIG. 3) in all the target ECUs 62tar is completed. Are transmitted in order (S9 in FIG. 3, S52 in FIG. 7). Then, the calculation unit 24 detects the stop of all the target ECUs 62tar when there is no response to the first operation confirmation signal Scnf1 (S52 in FIG. 7).

  Accordingly, as compared with the case where the first operation confirmation signal Scnf1 is transmitted to all the rewritable ECUs 62 (target ECU 62tar) all at once, determination is easy because only the stop of the rewritten ECU 62 is detected. At the same time, the time required for confirmation can be shortened. In addition, since the target ECU 62tar that has been rewritten is detected as having no response to the first operation confirmation signal Scnf1 to detect the stop of the target ECU 62tar and the subsequent processing is performed, each target ECU 62tar can be reliably restarted. It becomes.

  In the present embodiment, the calculation unit 24 (rewrite control unit) of the rewrite device 12 completes the IGSW 80 (or battery 82 (for the ECU 62) for the ECU 62) after the program rewrite (S8 in FIG. 3) for all the target ECUs 62tar is completed. The off operation request for requesting the off operation of the power source) is displayed on the display unit 28 (S9 in FIG. 3, S51 in FIG. 7). In addition, the calculation unit 24 detects a stop of all the target ECUs 62tar and ends the transmission of the stop request signal Sstp (S52: YES in FIG. 7), and then displays a re-on operation request for requesting a re-on operation of the IGSW 80. The data is displayed on the unit 28 (S54). Thus, in order to make a re-on operation request, it is necessary to confirm that all the target ECUs 62tar are turned off. For this reason, even when there are a large number of target ECUs 62tar or there are target ECUs 62tar that take a long time to power off, it is possible to instruct the restart operation after powering off all target ECUs 62tar reliably. Become.

  In the present embodiment, the rewriting device 12 includes an order DB 52, a combination DB 54 (rewriting candidate information database), and a program DB 56 (rewriting program database) (FIGS. 1 and 2). Further, the calculation unit 24 (rewrite control unit) of the rewriting device 12 receives the ECU ID and the current program ID (including the current version information Iver of the installed program Pi) from all the rewritable ECUs 62a to 62j included in the network 60. Reading in pairs (S27 in FIG. 4). The calculation unit 24 compares the read current version information Iver with the latest version information Iver corresponding to the current version information Iver, and determines the rewrite candidate ECU 62can paired with the current version information Iver that does not match the latest version information Iver. Extracted as the target ECU 62tar (S47 in FIG. 5). The calculation unit 24 continuously executes the program rewriting operation on the extracted target ECU 62tar in the priority order Op stored in the order DB 52 (S8 in FIG. 3 and S48 in FIG. 5).

  According to this embodiment, the program is rewritten in the priority order Op corresponding to the combination of the ECUs 62 (target ECU 62tar) that needs to be rewritten in each change target operation Otar of the vehicle 14 (FIG. 5). For this reason, it becomes possible to perform the program rewriting in the order optimal for the vehicle 14.

  Further, according to the present embodiment, the priority for each change target operation Otar is given to the target ECU 62tar that is the rewrite candidate ECU 62can whose current program ID (current version information Iver) and the latest program ID (latest version information Iver) do not match. Rewriting to the latest version of the program P is continuously executed according to the order Op (FIGS. 4 and 5). For this reason, since only the candidate ECU 62can that needs to be rewritten is rewritten, the rewriting work can be performed efficiently.

  According to the above, even when a maintenance company such as a dealer performs program rewriting for the vehicle 14 on the market, the maintenance operator (operator) does not erroneously select the target ECU 62tar. In addition, it is possible to reduce the work load for specifying the rewriting order, and it is possible to easily perform appropriate rewriting work.

  Further, even if there is a target ECU 62tar that has failed to be rewritten during program rewriting, by performing the rewriting operation again, with respect to the target ECU 62tar that has not been rewritten except for the target ECU 62tar that has already been successfully rewritten. Rewriting can be performed.

B. Modifications It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various configurations can be adopted based on the description of the present specification. For example, the following configuration can be adopted.

[B1. Applicable to]
In the above-described embodiment, the system 10 is used for the vehicle 14, but is not limited thereto, and may be other moving bodies (airplanes, ships, helicopters, etc.), for example.

[B2. Configuration of Program Rewriting System 10]
(B2-1. Program rewriting device 12)
(B2-1-1. General)
In the above embodiment, the rewriting device 12 is connected from the outside of the vehicle 14 (FIG. 1). However, for example, from the viewpoint of confirming that there is no communication failure before the rewriting of the program (S23, S25 in FIG. 4), the rewriting device 12 can be mounted on the vehicle 14 without being limited to this.

  In the above embodiment, communication between the rewriting device 12 and the in-vehicle network 60 is performed by wire (FIG. 1). However, for example, from the viewpoint of communication with the in-vehicle network 60, the communication is not limited to this, and wireless communication is also possible.

(B2-1-2. Storage unit 26)
The order DB 52 of the above embodiment stores the rewrite priority order Op of the ECUs 62 of a plurality of vehicle types together (FIG. 2). However, for example, from the viewpoint of specifying the priority order Op for a specific change target operation Otar, the present invention is not limited to this. For example, the order DB 52 can store only the priority order Op of the ECU 62 of a single vehicle type. Alternatively, the order DB 52 may store the priority order Op for each change target operation Otar.

  In the above embodiment, each DB 50, 52, 54, 56 and list 58 are provided in the rewriting device 12 (FIG. 1). However, for example, when the rewriting device 12 has a communication function with an external server, one or more of the DBs 50, 52, 54, 56 and the list 58 are provided in the external server, and the rewriting device 12 is connected to the external server. Necessary data may be acquired.

(B2-2. Vehicle 14)
In the above embodiment, it is assumed that the vehicle 14 is a gasoline vehicle, but the present invention is not limited to this. The vehicle 14 may be, for example, an electric vehicle (including a hybrid vehicle and a fuel cell vehicle).

[B3. Program rewriting]
(B3-1. General)
In the above embodiment, processing is performed in the form of a program ID in which the program name and version information Iver are integrated. For example, in the program ID history DB 50, the combination DB 54, etc., data is managed as a program ID (FIG. 2). However, from the viewpoint of using the program name and the version information Iver, the program name and the version information Iver can be managed separately.

  In the above embodiment, the ECU ID and the program ID are set separately (FIG. 2). However, for example, when there is only one type of program P used in each ECU 62, the ECU ID and the program ID can be integrated and used.

(B3-2. Target ECU combination selection process (S4 in FIG. 3, FIG. 4))
In the above embodiment, the rewriting device 12 identifies the latest program ID using the program ID history DB 50 (S28 in FIG. 4). However, for example, from the viewpoint of confirming whether the current program ID in the candidate ECU 62can is the latest version, the present invention is not limited to this.

  For example, the rewriting device 12 can handle the candidate program ID stored in the combination DB 54 as the latest program ID. In this case, even though the program names are the same, the latest version information Iver may be different for each change target operation Otar. In this case, when the rewriting device 12 performs the program rewriting with respect to the specific change target operation Otar (first change target operation), the rewriting device 12 compares the candidate program ID with respect to another change target operation Otar (second change target operation). Good. If the candidate program ID related to the second change target action is a newer version than the candidate program ID related to the first change target action, the candidate program ID related to the second change target action can be used.

  In the above embodiment, in the rewrite candidate ECU combination selection process (FIG. 4), information on the rewrite candidate ECU 62can whose current version information Iver matches the latest version information Iver is also registered in the list 58 (S30 in FIG. 4). In the continuous program rewriting process (FIG. 5), when the target program ID (current program ID) matches the latest program ID (S47: YES), the program rewriting is not performed.

  However, for example, from the viewpoint of rewriting a program for a rewrite candidate ECU 62can whose current version information Iver does not match the latest version information Iver, the present invention is not limited to this. For example, the candidate ECU ID (and candidate program ID) registered in the list 58 in step S30 of FIG. 4 may be limited to only the rewrite candidate ECU 62can whose current version information Iver does not match the latest version information Iver. As a result, the process of step S47 in FIG. 5 can be omitted. If the combination number Nset is combined and registered in the list 58 in step S30 of FIG. 4 (part of S4 of FIG. 3), then the selected combination number Nset is selected in step S5 of FIG. Possible combinations can be determined.

  In the above embodiment, it is determined that there is no communication failure in the gateway ECU 62a and the other ECUs 62 (ECUs 62b to 62j) (S23 and S25 in FIG. 4). However, for example, from the viewpoint of determining a communication failure in the entire network 60 or the target ECU 62tar, the present invention is not limited to this. For example, steps S23 and S25 in FIG. 4 can be integrated. At this time, it is also possible to limit the confirmation that there is no communication failure to only the combination of the target ECU 62tar and the gateway ECU 62a or only the target ECU 62tar instead of all the ECUs 62a to 62j.

  Further, for example, from the viewpoint of specifying the change target operation Otar that needs to be rewritten, it is possible to omit confirmation that there is no communication failure (S22 to S25 in FIG. 4).

  In the above embodiment, the change target operation Otar that requires program rewriting is specified based on the comparison of program IDs (S27 to S30 in FIG. 4). However, for example, from the viewpoint of specifying the change target operation Otar that requires program rewriting, the present invention is not limited to this. For example, the change target operation Otar that needs to be rewritten may be specified based on the contrast of the ECU ID. When the history of program rewriting is managed for each vehicle 14 and the change target operation Otar that needs to be rewritten can be specified in advance, the rewrite device 12 itself can select the change target operation Otar.

(B3-3. Program Continuous Rewrite Processing (S8 in FIG. 3, S48 in FIG. 5))
In the above embodiment, the network communication stop request signal Sstp is periodically transmitted. However, for example, from the viewpoint of maintaining each ECU 62 in a desired state, the signal to be transmitted is not limited to this. For example, the rewriting device 12 can periodically transmit a signal requesting the maintenance of the current state (a state in which DTC storage is prohibited and a state in which mutual communication between the ECUs 62 is stopped) to each ECU 62. is there.

(B3-4. Rewriting completion confirmation process (S9 in FIG. 3, FIG. 7))
In the above embodiment, in order to restart each target ECU 62tar, the user of the rewriting device 12 asked for the IGSW 80 off operation and the re-on operation (S51 and S54 in FIG. 7). However, for example, from the viewpoint of restarting each target ECU 62tar, the present invention is not limited to this. For example, a reactivation signal can be output from the rewriting device 12 to each target ECU 62tar.

  In the embodiment described above, confirmation of power-off of each target ECU 62tar after the rewriting of the program (S52 in FIG. 7) was performed in order for each target ECU 62tar (FIG. 9). However, for example, from the viewpoint of rewriting the program for each change target operation Otar, the present invention is not limited to this. For example, the rewriting device 12 can simultaneously confirm that the plurality of target ECUs 62tar are turned off.

(B3-5. Others)
In the above embodiment, the user of the rewriting device 12 selects the change target operation Otar (S6 and S7 in FIG. 3). In other words, the change target operation selection unit that selects the change target operation Otar is the operation input unit 22 that inputs a user operation. However, for example, from the viewpoint of selecting the change target operation Otar, the present invention is not limited to this. For example, the rewriting device 12 itself can select the change target operation Otar.

DESCRIPTION OF SYMBOLS 12 ... Program rewriting apparatus 14 ... Vehicle 20 ... Signal input / output part (network connection part)
24 ... Calculation unit (rewrite control unit) 28 ... Display unit 52 ... Order DB 54 ... Combination DB
56 ... Program DB (Rewrite Program Database)
60 ... Network 62 ... ECU
62can: Rewrite candidate ECU 62tar: Target ECU
Op ... Priority order Otar ... Change target operation P ... Program Pi ... Installed program Pr ... Rewrite program Scnf1 ... First operation confirmation signal (operation confirmation signal)
Sreqpid ... Current program ID request signal (version information request signal)
Sstp ... Network communication stop request signal (stop / inhibit request signal)

Claims (5)

A network connection unit connected to a network of an electronic control device (hereinafter referred to as “ECU”) in the vehicle and a plurality of ECUs (hereinafter referred to as “target ECUs”) that require program rewriting are selected from outside the vehicle. A program rewriting device comprising a rewrite control unit for performing program rewriting,
The rewrite control unit
To each of the ECUs, a stop / prohibition request signal for requesting the mutual communication stop and the failure code storage prohibition is transmitted,
In a state where the stop / prohibition request signal is transmitted, a program rewrite operation is sequentially performed on the target ECU,
After completion of the program rewriting operation in all the target ECUs, an operation confirmation signal is transmitted to each of the target ECUs,
When the stop of all the target ECUs is detected with no response to the operation confirmation signal, the transmission of the stop / prohibition request signal is terminated,
Then, a version information request signal for requesting the version information of the installed program is sent to the target ECU,
A program rewriting device for confirming whether or not the version information received from the target ECU is the latest version. The program rewriting device according to claim 1,
The rewrite control unit
After completion of the program rewriting operation in all the target ECUs, the operation confirmation signals are sequentially transmitted to the target ECUs one by one.
A program rewriting device that detects stop of all the target ECUs when there is no response to the operation confirmation signal. The program rewriting device according to claim 1 or 2,
The rewrite control unit
After the program rewriting operation for all the target ECUs is completed, an off operation request for requesting an off operation of the power source for the ECU in the vehicle is displayed on the display unit,
After the stop of all the target ECUs is detected and the transmission of the stop / prohibition request signal is finished, a re-on operation request for requesting a re-on operation of the power supply for the ECU is displayed on the display unit. Program rewriting device. In the program rewriting apparatus of any one of Claims 1-3,
The program rewriting device is:
In order to correspond to the identification symbols of all the rewritable ECUs mounted on the vehicle, an order database in which the priority order of rewriting is stored in advance,
For each change target operation of the vehicle that requires program rewriting, a combination of the identification symbol of the rewriting candidate ECU that is the candidate for the target ECU and the latest version information of the installed program of the rewriting candidate ECU is stored as rewriting candidate information. Rewriting candidate information database;
A rewriting program database for storing the rewriting program,
The rewrite control unit
Read the ECU identification symbol and the current version information of the installed program from all the rewritable ECUs included in the network,
The read current version information is compared with the latest version information corresponding to the current version information, and the rewrite candidate ECU paired with the current version information that does not match the latest version information is extracted as the target ECU. And
A program rewriting device that continuously executes a program rewriting operation in the priority order stored in the order database for the extracted target ECU. A network connection unit connected to a network of an electronic control device (hereinafter referred to as “ECU”) in the vehicle and a plurality of ECUs (hereinafter referred to as “target ECUs”) that require program rewriting are selected from outside the vehicle. A program rewriting method in a program rewriting device comprising a rewrite control unit for performing program rewriting,
The rewrite control unit
To each of the ECUs, a stop / prohibition request signal for requesting the mutual communication stop and the failure code storage prohibition is transmitted,
In a state where the stop / prohibition request signal is transmitted, a program rewrite operation is sequentially performed on the target ECU,
After completion of the program rewriting operation in all the target ECUs, an operation confirmation signal is transmitted to each of the target ECUs,
When the stop of all the target ECUs is detected with no response to the operation confirmation signal, the transmission of the stop / prohibition request signal is terminated,
Thereafter, a version information request signal for requesting the version information of the current program is sent to the target ECU,
A program rewriting method comprising: checking whether or not the version information received from the target ECU is the latest version.

Images