JP2024039972A - In-vehicle device, program and information processing method - Google Patents

Abstract

The present invention provides an on-vehicle device, etc. that efficiently performs processing related to communication between a plurality of mounted microcomputers.
[Solution] An on-vehicle device is an on-vehicle device that is mounted on a vehicle and is communicably connected to an external device located outside the vehicle, and is connected to an ECU terminal that is connected to an on-vehicle device mounted on the vehicle. , comprising a plurality of microcomputers that perform processing related to control of the on-vehicle equipment, and a processing unit that performs processing related to communication between the plurality of microcomputers, and the processing unit performs input/output with the on-board equipment connected to each of the ECU terminals. acquiring and acquiring communication path information generated by the external device based on ECU terminal information including information and terminal association information including association information between each of the ECU terminals and each of the microcomputer terminals provided in each of the plurality of microcomputers; The communication path information thus obtained is applied to the plurality of microcomputers.
[Selection diagram] Figure 1

Description

The present invention relates to an in-vehicle device, a program, and an information processing method.

An electronic control device that is mounted on a vehicle, includes a plurality of microcomputers, and is capable of detecting abnormalities in a communication bus has been disclosed (for example, Patent Document 1). The electronic control device of Patent Document 1 is one of a plurality of nodes connected to a communication bus, and includes a first microcomputer and a second microcomputer that receive transmission signals flowing through the communication bus and transmit transmission signals to the communication bus. The device includes two microcomputers, and is configured such that a transmission signal to be transmitted to a communication bus is transmitted to each microcomputer without going through the communication bus, and each microcomputer receives the transmission signal.

Japanese Patent Application Publication No. 2016-126716

However, the electronic control device of Patent Document 1 has a problem in that it does not take into account the efficient processing of communication between a plurality of microcomputers included in the electronic control device.

An object of the present disclosure is to provide an in-vehicle device or the like that can efficiently perform processing related to communication between a plurality of mounted microcomputers.

An in-vehicle device according to an aspect of the present disclosure is an in-vehicle device that is mounted on a vehicle and communicably connected to an external device located outside the vehicle, and is connected to an in-vehicle device installed in the vehicle. An ECU terminal, a plurality of microcomputers that perform processing related to control of the in-vehicle equipment, and a processing unit that performs processing related to communication between the plurality of microcomputers, and the processing unit connects to the in-vehicle equipment connected to each of the ECU terminals. Acquire communication path information generated by the external device based on ECU terminal information including input/output information of the ECU terminal and terminal association information including association information between each of the ECU terminals and each of the microcomputer terminals provided in each of the plurality of microcomputers. and applies the acquired communication path information to the plurality of microcomputers.

According to one aspect of the present disclosure, it is possible to provide an in-vehicle device or the like that efficiently performs processing related to communication between a plurality of mounted microcomputers.

1 is a schematic diagram illustrating the configuration of an in-vehicle system including an in-vehicle device and the like according to a first embodiment; FIG. FIG. 2 is a block diagram illustrating the internal configuration of an on-vehicle device and the like. FIG. 2 is an explanatory diagram schematically showing a process of generating communication route information, etc. FIG. 3 is a flowchart illustrating processing by a processing unit of an on-vehicle device, etc. FIG. 7 is an explanatory diagram showing an example of communication route information (integrated table) according to the second embodiment.

[Description of embodiments of the present disclosure]
First, embodiments of the present disclosure will be listed and described. Furthermore, at least some of the embodiments described below may be combined arbitrarily.

(1) An in-vehicle device according to one aspect of the present disclosure is an in-vehicle device that is installed in a vehicle and is communicably connected to an external device located outside the vehicle, and is connected to an in-vehicle device installed in the vehicle. ECU terminals to be connected, a plurality of microcomputers that perform processing related to control of the in-vehicle equipment, and a processing section that performs processing related to communication between the plurality of microcomputers, and the processing section includes an ECU terminal that is connected to each of the ECU terminals. A communication route generated by the external device based on ECU terminal information including input/output information with in-vehicle equipment and terminal association information including association information between each of the ECU terminals and each of the microcomputer terminals provided in each of the plurality of microcomputers. information is acquired, and the acquired communication path information is applied to the plurality of microcomputers.

In this aspect, the in-vehicle device includes a plurality of microcomputers and a processing section that performs processing related to communication between the microcomputers, and each microcomputer includes a plurality of microcomputer terminals. The in-vehicle device includes a plurality of ECU terminals connected to in-vehicle equipment such as actuators or sensors. A wire harness or the like is connected to the ECU terminal, and the in-vehicle device and the in-vehicle equipment are communicably connected by the wire harness or the like. The processing section may be any control section included in each of the plurality of microcomputers. That is, a control unit such as a CPU or MPU included in any one of the microcomputers functions as a processing unit. Alternatively, the processing section may be an arithmetic circuit such as an FPGA (Field Programmable Gate Array) or a software processing section configured separately from each of the plurality of microcomputers. The external device generates communication path information (routing table) used by the plurality of microcomputers for communication based on the terminal association information and the ECU terminal information. The communication path information (routing table) may be generated as an ECU configuration file applied to the in-vehicle device, such as a HEX format file, for example. The terminal association information includes connection information (information associated with logical names) between the ECU terminal and the microcomputer terminal, and is determined as a product specification of the in-vehicle device. The ECU terminal information includes connection information indicating in-vehicle devices connected to each ECU terminal, and is information provided by the manufacturer of the vehicle in which the in-vehicle device is installed. The external device may acquire these terminal association information and ECU terminal information online or offline from an information processing device such as an on-vehicle device and a vehicle manufacturer. The processing unit applies the communication route information to each microcomputer by acquiring the communication route information (ECU configuration file) generated by the external device and storing it in the storage unit included in each of the plurality of microcomputers. This allows vehicle manufacturers to perform connection settings for in-vehicle devices connected to the ECU terminals of in-vehicle devices without being aware of the internal wiring structure of the in-vehicle devices (connection structure between ECU terminals and microcomputer terminals). I can do it. Furthermore, it is possible to absorb changes in the hardware configuration such as the number of microcomputers included in the in-vehicle device or the wiring structure between microcomputer terminals and ECU terminals, and differences in specifications between ECU manufacturers. The processing unit can automatically set the communication path information (ECU configuration file) generated by the external device by applying the communication path information (ECU configuration file) to each of the plurality of microcomputers. As a result, development man-hours and development costs can be reduced compared to the case where communication software for a microcomputer is developed according to the model of each vehicle in which an in-vehicle device is installed. By using the in-vehicle device configured in this manner, it is possible to easily support a plurality of different vehicle models, develop derivative vehicle models, and the like.

(2) In the in-vehicle device according to one aspect of the present disclosure, the communication path information generated by the external device is connected to the microcomputer terminal of each of the plurality of microcomputers and the in-vehicle device connected via the ECU terminal. and second communication path information used for inter-microcomputer communication between the plurality of microcomputers.

In this aspect, the communication path information (ECU configuration file) generated by the external device is the first communication path information that indicates the connection relationship between the microcomputer terminals of each of the plurality of microcomputers and the in-vehicle equipment connected via the ECU terminals. It includes route information (routing table 1) and second communication route information (routing table 2) used for inter-microcomputer communication between a plurality of microcomputers. By referring to the first communication path information (routing table 1), the microcomputer can recognize the in-vehicle equipment connected to the microcomputer terminal of the microcomputer itself. Furthermore, by referring to the second communication path information (routing table 2), the microcontroller can output a signal to the in-vehicle device connected to the microcontroller terminal of another microcontroller, by referring to the second communication path information (routing table 2). can be identified.

(3) In the in-vehicle device according to one aspect of the present disclosure, the communication route information generated by the external device is common to each of the first communication route information corresponding to each of the plurality of microcomputers and the plurality of microcomputers. the second communication path information, and the processing unit individually applies each of the first communication path information to each of the plurality of microcomputers corresponding to each of the first communication path information, and 2 communication path information is commonly applied to the plurality of microcomputers.

In this aspect, the external device generates first communication route information (routing table 1) according to each of the plurality of microcomputers. As a result, the first communication path information (routing table 1) becomes different information for each microcomputer, and corresponds to input/output settings for each microcomputer. Since the external device generates the second communication route information (routing table 2) as common information for multiple microcomputers, each microcomputer can communicate with each other based on the common second communication route information (routing table 2). communication between the two can be performed efficiently. Communication route information including a plurality of first communication route information corresponding to each microcontroller and second communication route information common to all microcontrollers is generated as a single file (archive file) in HEX format, for example. Even in such a case, the processing unit individually applies the first communication path information corresponding to the microcomputer to each microcomputer. Then, in order to apply the second communication route information that is shared among all the microcomputers to each microcomputer, the processing unit applies the first communication route information and the second communication route information to all the microcomputers included in the in-vehicle device. Communication path information can be appropriately applied.

(4) In the in-vehicle device according to one aspect of the present disclosure, each of the plurality of microcomputers is communicably connected via a CAN bus, and any one of the plurality of microcomputers is connected to the microcomputer terminal of another microcomputer. When outputting a signal from the ECU terminal, the signal is transmitted via the CAN bus to the other microcomputer identified based on the second communication path information, and the other microcomputer A signal received from the microcomputer is outputted from the microcomputer terminal of the other microcomputer.

In this aspect, each of the plurality of microcomputers is communicably connected via a CAN (Controller Area Network) bus, so that the CAN bus can be used as an internal bus for communication between the microcomputers. In this case, communication between microcomputers is performed using the CAN protocol, and messages can be sent to all microcomputers connected to the CAN bus by multicast communication using a predetermined message ID. When one of the multiple microcontrollers outputs a signal from an ECU terminal connected to the microcontroller terminal of another microcontroller, it outputs a signal to the other microcontroller specified based on the second communication path information via the CAN bus. Send a signal. The other microcomputer outputs the signal received from one of the microcomputers from its own microcomputer terminal (the other microcomputer). By using the second communication path information in this manner, relay processing between microcomputers can be efficiently performed. The relay processing between the microcomputers is not limited to the case where an on-vehicle device transmits a signal to an on-vehicle device, but can also be applied when an on-vehicle device receives a signal from an on-vehicle device. That is, each microcomputer transmits the signal or data from the in-vehicle device acquired through the microcomputer terminal of the microcomputer itself to the other microcomputer specified based on the second communication path information via the CAN bus. It may be something that does.

(5) A program according to an aspect of the present disclosure includes an ECU terminal installed in a vehicle, communicably connected to an external device located outside the vehicle, and connected to in-vehicle equipment installed in the vehicle; A computer including a plurality of microcomputers that perform processes related to control of the in-vehicle devices and a processing unit that performs processes related to communication between the plurality of microcomputers, and an ECU that includes input/output information with the in-vehicle devices connected to each of the ECU terminals. Communication route information generated by the external device is acquired based on terminal information and terminal association information including association information between each of the ECU terminals and each of the microcomputer terminals provided in each of the plurality of microcomputers, and the acquired communication route A process for applying the information to the plurality of microcomputers is executed.

In this aspect, it is possible to provide a program that allows a computer to operate as an in-vehicle device that efficiently performs processing related to communication between a plurality of mounted microcomputers.

(6) An information processing method according to an aspect of the present disclosure includes an ECU terminal installed in a vehicle, communicably connected to an external device located outside the vehicle, and connected to in-vehicle equipment installed in the vehicle. and input/output information with the in-vehicle devices connected to each of the ECU terminals to a computer including a plurality of microcomputers that perform processes related to control of the in-vehicle devices, and a processing section that performs processes related to communication between the plurality of microcomputers. Based on the included ECU terminal information and terminal association information including association information between each of the ECU terminals and each of the microcomputer terminals provided in each of the plurality of microcomputers, the communication path information generated by the external device is acquired, and the acquired A process of applying the communication path information to the plurality of microcomputers is executed.

In this aspect, it is possible to provide an information processing method that allows a computer to operate as an on-vehicle device that efficiently performs processing related to communication between a plurality of mounted microcomputers.

[Details of embodiments of the present disclosure]
The present disclosure will be specifically described based on drawings showing embodiments thereof. An in-vehicle system S according to an embodiment of the present disclosure will be described below with reference to the drawings. Note that the present disclosure is not limited to these examples, but is indicated by the scope of the claims, and is intended to include all changes within the meaning and scope equivalent to the scope of the claims.

(Embodiment 1)
Hereinafter, embodiments will be described based on the drawings. FIG. 1 is a schematic diagram illustrating the configuration of an in-vehicle system S including an in-vehicle device 1 and the like according to the first embodiment. FIG. 2 is a block diagram illustrating the internal configuration of the in-vehicle device 1 and the like. The in-vehicle system S is mainly configured with an in-vehicle device 1 mounted on a vehicle C, and various in-vehicle devices 3 are connected to the in-vehicle device 1 using wire harnesses or direct wires (conductive cables that transmit only one signal). ), etc., to enable communication. The in-vehicle device 1 may be communicably connected to other in-vehicle ECUs and the like via an in-vehicle network constituted by communication lines such as a CAN bus or Ethernet (registered trademark). In this case, the in-vehicle device 1 includes an in-vehicle communication unit such as a CAN transceiver or an Ethernet PHY.

The in-vehicle device 1 includes a plurality of microcomputers including, for example, a first microcomputer 101 and a second microcomputer 102, and these microcomputers cooperate to perform drive control for various in-vehicle devices 3 connected to the in-vehicle device 1. Perform processing. The in-vehicle device 1 may be compatible with diagnostic processing (diagnosis processing) that is compatible with an ECU diagnostic communication protocol such as UDS (Unified Diagnostic Service), for example. In this case, the in-vehicle device 1 communicates with an external device S1 located outside the vehicle C (connected from the outside) using the communication protocol of the UDS, and receives communication route information (ECU configuration) from the external device S1. obtain (receive) a file). Details of the communication path information (ECU configuration file) will be described later.

The in-vehicle device 1 includes a first microcomputer 101 and a second microcomputer 102. The number of microcomputers included in the in-vehicle device 1 is not limited to two, and the in-vehicle device 1 may include three or more microcomputers. The in-vehicle device 1 includes a plurality of ECU terminals 2, and an in-vehicle device 3 is connected to each ECU terminal 2.

The in-vehicle devices 3 include, for example, lighting devices such as door locks, door mirrors, and illumination lamps, actuators such as wipers, various sensor devices, and various operation switches, and each of the ECU terminals 2 is connected to the input side of these in-vehicle devices 3. It may be connected to a terminal or an output terminal. That is, the ECU terminal 2 corresponds to an external input/output terminal in the vehicle-mounted device 1. Each of these ECU terminals 2 is connected (wired) to one of the microcomputer terminals 14 of the first microcomputer 101 or the second microcomputer 102 by an inter-terminal bus 21.

The first microcomputer 101 includes a control section 11 , a storage section 12 , and a communication section 13 , and further includes a microcomputer terminal 14 . The control unit 11 is composed of, for example, a CPU (Central Processing Unit) or an MPU (Micro Processing Unit), and reads and executes a program P (program product) and data stored in advance in the storage unit 12. , performs various control processing, calculation processing, etc.

The storage unit 12 is configured of, for example, a volatile memory element such as a RAM (Random Access Memory), or a nonvolatile memory element such as a ROM (Read Only Memory), an EEPROM (Electrically Erasable Programmable ROM), or a flash memory. A program P (program product) and data to be referred to during processing are stored in advance. The program P (program product) stored in the storage unit 12 may be a program P (program product) read from a recording medium M readable by the in-vehicle device 1. Alternatively, the program P (program product) may be downloaded from an external computer (not shown) connected to a communication network (not shown) and stored in the storage unit 12.

The communication unit 13 is composed of, for example, a CAN transceiver, and is an input/output interface using a CAN communication protocol. The communication unit 13 may be configured with an Ethernet PHY, and may be an input/output interface using an Ethernet communication protocol, or may use a clock synchronization method such as SPI (Serial Peripheral Interface). The communication unit 13 is used for inter-microcomputer communication with the second microcomputer 102, which is another microcomputer, but may also be used for communication with the external device S1 or other in-vehicle ECU.

The microcomputer terminal 14 includes an output terminal that outputs a signal or data that is a processing result by the control unit 11 of the first microcomputer 101, and an input terminal that receives a signal or data that the control unit 11 acquires. 11 via an internal bus or land. A terminal number is set (given) to each of the microcomputer terminals 14, and the control unit 11 performs input/output processing via the microcomputer terminals 14 using the terminal numbers.

In this embodiment, the first microcomputer 101 includes two microcomputer terminals 14, a microcomputer terminal 14(a) and a microcomputer terminal 14(b). Each of these microcomputer terminals 14 is connected to each of the corresponding ECU terminals 2 via an inter-terminal bus 21. In this embodiment, the microcomputer terminal 14(a) is connected to the ECU terminal 2(A).
The microcomputer terminal 14(b) is connected to the ECU terminal 2(B).

The second microcomputer 102 includes a control section 11, a storage section 12, and a communication section 13 like the first microcomputer 101, and further includes a microcomputer terminal 14. The first microcomputer 101 and the second microcomputer 102 are communicably connected via their respective communication units 13, for example, by an internal bus 131 using a CAN bus. Thereby, the first microcomputer 101 and the second microcomputer 102 perform communication between the programs being executed in their respective control units 11 (inter-microcomputer communication).

In this embodiment, the second microcomputer 102 includes one microcomputer terminal 14 consisting of a microcomputer terminal 14(c). In this embodiment, the microcomputer terminal 14(c) is connected to the ECU terminal 2(C). Although details will be described later, the connection form between the ECU terminal 2 and the microcomputer terminal 14 corresponds to the internal wiring structure in the vehicle-mounted device 1, and is defined as the product specifications of the vehicle-mounted device 1.

The external device S1 is, for example, a computer having an information processing function and a communication function, such as a personal computer, a tablet computer, or a mobile terminal such as a smart phone. The external device S1, like the in-vehicle device 1, includes a control section S11, a storage section S12, and a communication section S13. A program (program product) for automatically generating communication path information (ECU configuration file) is stored in the storage unit S12 of the external device S1. The external device S1 may be, for example, a diagnostic device that is externally attached to the in-vehicle network and performs diagnostic processing for the in-vehicle device 1. The in-vehicle device 1 and the external device S1 are communicably connected via a communication unit S13 that performs wireless communication such as WiFi (registered trademark) or wired communication such as a CAN bus or a serial cable.

FIG. 3 is an explanatory diagram schematically showing the process of generating communication route information. In this embodiment, the control unit S11 of the external device S1 automatically generates communication path information (ECU configuration file, routing table) by executing a program stored in the storage unit S12 of the external device S1. function as a department. When the external device S1 functions as a diagnostic device that performs diagnostic processing for the in-vehicle device 1, the external device S1 and the in-vehicle device 1 communicate using, for example, an ECU diagnostic communication protocol such as UDS (Unified Diagnostic Service). It's okay. Alternatively, the external device S1 and the in-vehicle device 1 may communicate indirectly through an OTA server located outside the vehicle. In this case, the OTA server acquires and stores the communication route information generated by the external device S1, and then transmits the communication route information to the in-vehicle device 1 (reprogramming by OTA (Over The Air)). good. Communication between the in-vehicle device 1 and the OTA server may be performed, for example, via an external communication device connected to an in-vehicle network. In this way, the external device S1 and the vehicle-mounted device 1 may communicate directly or indirectly via an OTA server or the like.

The control unit 11 of the first microcomputer 101 or the second microcomputer 102 acquires communication path information (ECU configuration file) from the external device S1 by executing a program stored in the storage unit 12, and sends the information to each microcomputer. It functions as an application processing unit. Alternatively, the processing section may be an arithmetic circuit such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array), or a software processing section configured separately from each of the plurality of microcomputers.

The control unit S11 of the external device S1 acquires ECU terminal information and terminal association information. The ECU terminal information includes input/output information with the in-vehicle equipment 3 connected to each of the ECU terminals 2. The terminal association information includes association information (wire connection structure) between each of the ECU terminals 2 and each of the microcomputer terminals 14 provided in each of the plurality of microcomputers. The information regarding the microcomputer terminals 14 in the terminal association information includes the terminal number of the microcomputer terminal 14 and information indicating which microcomputer (microcomputer ID) each microcomputer terminal 14 (terminal number) is provided.

The control unit S11 of the external device S1 generates communication path information (ECU configuration file) based on the acquired ECU terminal information and terminal association information. The communication path information may be generated as a file (archive file) in HEX format, for example. The communication route information (ECU configuration file) includes first communication route information (routing table 1) and second communication route information (routing table 2). The first communication path information (routing table 1) is generated for each microcomputer included in the in-vehicle device 1, and corresponds to input/output settings in each microcomputer.

In this embodiment, the first communication route information (routing table 1, input/output settings) for the first microcomputer 101 and the first communication route information (routing table 1, input/output settings) for the second microcomputer 102 are , generated. The second communication route information (routing table 2) is generated as common information for each microcomputer included in the in-vehicle device 1. Since the ECU terminal information and the terminal related information each include matters related to the ECU terminal 2 (ECU terminal number) as a common key item, the control unit S11 of the external device S1 controls the ECU terminal 2 (ECU terminal number). ) may be used to generate the first communication route information and the second communication route information by performing normalization processing on the ECU terminal information and the terminal association information.

The first communication path information (routing table 1) includes information indicating which in-vehicle device 3 is connected to the microcomputer terminal 14 provided in each microcomputer. Therefore, for example, for the first microcomputer 101 having the microcomputer terminals 14(a, b), the in-vehicle device 1 connected to the microcomputer terminals 14(a) and 14(b) has the definition (terminal a= Front seat door opens/closes, terminal b = illumination SW). For example, for the second microcomputer 102 including the microcomputer terminal 14(c), the in-vehicle device 1 connected to the microcomputer terminal 14(c) is defined (terminal c=illumination output).

The second communication path information (routing table 2) includes communication arrangement settings for each microcomputer terminal 14. The communication arrangement setting is information indicating the relationship between the terminal number of the microcomputer terminal 14 and the microcomputer ID of the microcomputer including the microcomputer terminal 14. By referring to the second communication path information, each microcomputer such as the first microcomputer 101 and the second microcomputer 102 can determine which microcomputer the terminal number of the microcomputer terminal 14 provided in the other microcomputer and which microcomputer terminal 14 with the terminal number is connected to. (Microcomputer ID). Therefore, each microcomputer such as the first microcomputer 101 and the second microcomputer 102 can refer to the second communication path information (routing table 2) commonly defined between the microcomputers and perform relay processing between the microcomputers. can.

The control unit S11 of the external device S1 outputs the generated communication path information (ECU configuration file) to the in-vehicle device 1. The processing unit of the in-vehicle device 1 acquires communication path information (ECU configuration file) output from the external device S1. Alternatively, the processing unit of the in-vehicle device 1 may acquire (reprogram) communication path information (ECU configuration file) generated by the external device S1 via an OTA server or the like.

The processing unit of the in-vehicle device 1 generates first communication path information and second communication path information corresponding to each microcomputer from the communication path information (ECU configuration file) directly or indirectly acquired from the external device S1. and extract. The processing unit stores the extracted first communication route information and second communication route information for the first microcomputer 101 in the storage unit 12 of the first microcomputer 101 . The processing unit stores the extracted first communication route information and second communication route information for the second microcomputer 102 in the storage unit 12 of the second microcomputer 102 . Thereby, the communication route information (first communication route information and second communication route information) extracted by the processing unit is applied to the first microcomputer 101 and the second microcomputer 102 individually.

FIG. 4 is a flowchart illustrating the processing of the processing unit of the in-vehicle device 1. The in-vehicle device 1 performs the following processing based on a start signal output from the external device S1, for example, when the vehicle C is in a stopped state (IG switch is off). The process may be performed at the manufacturing stage of the vehicle C, or may be performed at a factory such as an authorized dealer after the vehicle C is manufactured and shipped. Alternatively, the in-vehicle device 1 acquires the communication path information by performing reprogramming according to the campaign information from the OTA server that stores the communication path information (ECU configuration file) generated by the external device S1. It may be something.

The processing in this embodiment is performed in conjunction with the external device S1 and the vehicle-mounted device 1. First, the processing by the control section S11 of the external device S1 will be explained, and then the processing by the processing section (the control section 11 of the first microcomputer 101) of the in-vehicle device 1 will be explained. In this embodiment, the processing section that acquires the communication path information (ECU configuration file) from the external device S1 will be described as the control section 11 of the first microcomputer 101. The processing unit is not limited to the control unit 11 of the first microcomputer 101, and the control unit 11 of another microcomputer installed in the in-vehicle device 1, such as the second microcomputer 102, may function as the processing unit. It's okay.

The control unit S11 of the external device S1 acquires ECU terminal information (S101). The control unit S11 of the external device S1 obtains ECU terminal information online or offline from an information processing device of a vehicle manufacturer or the like, for example.

The ECU terminal information includes information specifying the on-vehicle equipment 3 connected to each ECU terminal 2 included in the on-vehicle device 1. That is, the ECU terminal information is information indicating an external connection structure between the on-vehicle device 1 and the on-vehicle equipment 3 connected to the on-vehicle device 1. The in-vehicle equipment 3 includes, for example, a door lock, a door mirror, a lighting device such as an illumination lamp, an actuator such as a wiper, various sensor devices, and various operation switches. In the ECU terminal information, which ECU terminal 2 is connected to the input side or output side of which in-vehicle device 3 is defined in a list format using, for example, XML, TXT, CSV, or TSV. The ECU terminal information is information that is defined as a mounting specification when the manufacturer of the vehicle C mounts the in-vehicle device 1 on the vehicle C. The ECU terminal information associates an ECU terminal number that uniquely indicates the ECU terminal 2 with the in-vehicle device 3 connected to the ECU terminal number.

The control unit S11 of the external device S1 acquires terminal association information (S102). The control unit S11 of the external device S1 obtains the terminal association information online or offline from an information processing device such as a manufacturer of the in-vehicle device 1, for example.

The terminal association information includes connection information (information associated with logical names) between each of the ECU terminals 2 and each of the microcomputer terminals 14, and is determined as a product specification of the in-vehicle device 1. The terminal association information is information indicating the internal wiring structure in the in-vehicle device 1, that is, the wiring structure between the ECU terminal 2 and the microcomputer terminal 14. The terminal association information associates the ECU terminal number that uniquely indicates the ECU terminal 2 with the terminal number of the microcomputer connected to the ECU terminal number. The terminal number of the microcomputer may be a combination of a microcomputer ID that uniquely indicates the microcomputer and the terminal number.

The control unit S11 of the external device S1 generates communication path information based on the acquired ECU terminal information and terminal association information (S103). The control unit S11 of the external device S1 generates communication path information (ECU configuration file) based on the ECU terminal number included in the acquired ECU terminal information and terminal association information. The control unit S11 of the external device S1 may generate the communication path information in a single file (archive file) in HEX format, for example. The control unit S11 of the external device S1 may generate communication route information by normalizing using the ECU terminal number. The control unit S11 of the external device S1 stores communication route information (ECU configuration file) including first communication route information (input/output settings, routing table 1) and second communication route information (input/output settings, routing table 2). Generate (automatically generate).

The first communication path information is generated for each microcomputer, and defines which in-vehicle device 3 is connected to the microcomputer terminal 14 of the microcomputer. When the in-vehicle device 1 includes two microcomputers, a first microcomputer 101 and a second microcomputer 102, as in this embodiment, the control unit S11 of the external device S1 receives first communication path information for the first microcomputer 101, The first communication path information for the second microcomputer 102 is generated separately.

The second communication path information is commonly generated for all microcomputers, and defines the communication arrangement settings of the microcomputer terminals 14 indicating which microcomputer terminals 14 are provided in which microcomputers. That is, the terminal number of the microcomputer terminal 14 and the microcomputer ID of the microcomputer including the microcomputer terminal 14 are defined in association with each other. Note that a logical name indicating which in-vehicle device 3 is connected to the terminal number of the microcomputer terminal 14 may be further defined in association with the terminal number.

The control unit S11 of the external device S1 outputs the generated communication route information (S104). The control unit S11 of the external device S1 outputs the generated communication route information to the in-vehicle device 1 using wired communication or wireless communication. Alternatively, the control unit S11 of the external device S1 may output the generated communication route information to the OTA server. In this case, the in-vehicle device 1 acquires communication route information via the OTA server.

The control unit 11 (processing unit) of the first microcomputer 101 acquires communication path information (T101). The control unit 11 of the first microcomputer 101 acquires communication path information generated by the in-vehicle device 1 by communicating with the in-vehicle device 1 using an ECU diagnostic communication protocol such as UDS (Unified Diagnostic Service). Alternatively, when the external device S1 outputs communication path information to the OTA server, the control unit 11 of the first microcomputer 101 acquires the communication path information from the OTA server as part of the reprogramming process by the OTA server. It may be.

The control unit 11 (processing unit) of the first microcomputer 101 applies the acquired communication path information (T102). When the communication route information (ECU configuration file) is generated as a single file in HEX format, for example, the control unit 11 of the first microcomputer 101 uses the communication route information (HEX file) to create a file that corresponds to each microcomputer. Each piece of first communication route information and second communication route information are extracted. The control unit 11 of the first microcomputer 101 stores each of the extracted first communication route information and the second communication route information in the respective storage units 12 of the first microcomputer 101 and the second microcomputer 102. The storage unit 12 of the first microcomputer 101 stores first communication route information and second communication route information for the first microcomputer 101. The storage unit 12 of the second microcomputer 102 stores first communication route information and second communication route information for the second microcomputer 102. As a result, the communication path information is applied to the first microcomputer 101 and the second microcomputer 102.

The communication route information (first communication route information, second communication route information) automatically generated by the external device S1 is applied to each microcomputer by the processing unit, thereby enabling efficient communication among the multiple microcomputers installed. can be achieved. That is, by efficiently generating the communication path information, it is possible to easily support multiple different vehicle models and develop derivative vehicle models without being aware of the connection structure between the ECU terminal 2 and the microcomputer terminal 14. be able to.

Each microcomputer installed in the in-vehicle device 1, such as the first microcomputer 101 and the second microcomputer 102, uses applied communication route information, that is, first communication route information (routing table 1) and second communication route information (routing table 2). ) to perform communication-related processing. The first microcomputer 101 and the second microcomputer 102 grasp which in-vehicle device 3 is connected to the microcomputer terminal 14 connected to themselves by referring to the first communication path information (routing table 1). Based on this, input/output processing (communication processing with the on-vehicle equipment 3) from the microcomputer terminal 14 connected to itself can be performed. By referring to the second communication path information (routing table 2), the first microcomputer 101 and the second microcomputer 102 grasp which microcomputer has the microcomputer terminal 14 that is not connected to them, and Based on this, it is possible to perform relay processing and the like to a microcomputer having a microcomputer terminal 14 that is not connected to itself.

(Embodiment 2)
FIG. 5 is an explanatory diagram showing an example of communication route information (integrated table) according to the second embodiment. In the first embodiment, for each microcomputer such as the first microcomputer 101 and the second microcomputer 102, the first communication route information (routing table 1) extracted from the communication route information (ECU configuration file) and the second communication Although the route information (routing table 2) is applied individually, the present invention is not limited thereto. The communication path information applied to each microcomputer such as the first microcomputer 101 and the second microcomputer 102 may be configured by a single table (integrated table) as illustrated in the present embodiment. The integrated table includes, as management items (fields), for example, the ECU terminal number of the ECU terminal 2, the in-vehicle device 1 connected to the ECU terminal 2, the terminal number of the microcomputer terminal 14, and the microcomputer ID.

The (ECU terminal number) field of the terminal number of the ECU terminal 2 stores the terminal number of the ECU terminal 2 provided in the in-vehicle device 1. The terminal number may be a physical name indicating the device name of the terminal or the like. The terminal number corresponds to a terminal number included in ECU terminal information that defines input/output information with the in-vehicle device 3 connected to each ECU terminal 2.

In the field of the in-vehicle device 1 connected to the ECU terminal 2, names indicating the in-vehicle devices 3 connected to each of the ECU terminals 2 are stored. The name indicating the in-vehicle device 3 may be defined by a logical name including information indicating input/output information (input side or output side) for the in-vehicle device 3. The name (logical name) indicating the in-vehicle device 3 is defined in the ECU terminal information and corresponds to information specifying the in-vehicle device 3 connected to the ECU terminal 2.

The terminal number of the microcontroller terminal 14 provided on each microcontroller is stored in the field of the terminal number of the microcontroller terminal 14. The microcontroller ID field of the terminal number of the microcontroller terminal 14 stores a microcontroller ID that uniquely identifies the microcontroller having the corresponding microcontroller terminal 14 (the microcontroller terminal 14 stored in the same record).

All the microcomputers installed in the in-vehicle device 1, such as the first microcomputer 101 and the second microcomputer 102, can determine which microcomputer terminal 14 is connected to which one by referring to the communication path information (integrated table) shown in this embodiment. It is possible to know whether the device is connected to the on-vehicle device 1 or not. Furthermore, all the microcomputers mounted on the vehicle-mounted device 1, such as the first microcomputer 101 and the second microcomputer 102, can know which microcomputer (microcomputer ID) is equipped with each microcomputer terminal 14. As a result, when the first microcomputer 101 and the second microcomputer 102 perform input/output of data or signals with each in-vehicle device 3 connected to the in-vehicle device 1, do they use their own microcomputer terminals 14, or do they use other microcomputers? Since it is necessary to go through the microcomputer terminal 14 of the microcomputer, it is possible to efficiently determine whether to perform relay processing with the other microcomputer. The communication route information (integrated table) may be stored in each of the storage units 12 of all the microcomputers installed in the vehicle-mounted device 1, such as the first microcomputer 101 and the second microcomputer 102. Alternatively, if the in-vehicle device 1 includes a shared memory that can be accessed by both the first microcomputer 101 and the second microcomputer 102, the communication path information (integration table) may be stored in the shared memory.

The embodiments disclosed herein are illustrative in all respects and should be considered not to be restrictive. The scope of the present disclosure is indicated by the claims, not the above meaning, and is intended to include meanings equivalent to the claims and all changes within the range.

A plurality of claims described in the claims may be combined with each other regardless of the citation format. The claims contain multiple dependent claims that are dependent on several claims. In the claims, multiple dependent claims that are dependent on multiple dependent claims are not written, but multiple dependent claims that are dependent on multiple dependent claims may be written.

C Vehicle S In-vehicle system S1 External device S11 Control unit S12 Storage unit S13 Communication unit 1 In-vehicle device 101 First microcomputer 102 Second microcomputer 11 Control unit (processing unit)
12 Storage unit M Recording medium P Program (program product)
13 Communication section 131 Internal bus 14 Microcomputer terminal 2 ECU terminal 21 Inter-terminal bus 3 In-vehicle equipment 31 Signal line

Claims (6)

An in-vehicle device mounted on a vehicle and communicably connected to an external device located outside the vehicle,
an ECU terminal connected to in-vehicle equipment mounted on the vehicle;
a plurality of microcomputers that perform processing related to controlling the in-vehicle equipment;
comprising a processing unit that performs processing related to communication between the plurality of microcomputers,
The processing unit includes:
Based on ECU terminal information including input/output information with the in-vehicle equipment connected to each of the ECU terminals, and terminal association information including association information between each of the ECU terminals and each of the microcomputer terminals provided in each of the plurality of microcomputers. , obtain communication path information generated by the external device,
An in-vehicle device that applies the acquired communication route information to the plurality of microcomputers. The communication path information generated by the external device is
first communication path information indicating a connection relationship between the microcomputer terminal provided in each of the plurality of microcomputers and the in-vehicle device connected via the ECU terminal;
The in-vehicle device according to claim 1, further comprising second communication path information used for inter-microcomputer communication between the plurality of microcomputers. The communication path information generated by the external device is
each of the first communication path information corresponding to each of the plurality of microcomputers;
and the second communication path information common to the plurality of microcomputers,
The processing unit includes:
applying each of the first communication route information to each of the plurality of microcomputers corresponding to each of the first communication route information,
The in-vehicle device according to claim 2, wherein the second communication path information is commonly applied to the plurality of microcomputers. Each of the plurality of microcomputers is communicably connected via a CAN bus,
When one of the plurality of microcomputers outputs a signal from the ECU terminal connected to the microcomputer terminal of another microcomputer, the other microcomputer specified based on the second communication path information, transmitting a signal via the CAN bus;
The in-vehicle device according to claim 2 or 3, wherein the other microcomputer outputs the signal received from the one of the microcomputers from the microcomputer terminal of the other microcomputer. an ECU terminal mounted on a vehicle, communicably connected to an external device located outside the vehicle, and connected to on-board equipment mounted on the vehicle; and a plurality of microcomputers that perform processing related to control of the on-board equipment. , a computer including a processing unit that performs processing related to communication between the plurality of microcomputers;
Based on ECU terminal information including input/output information with the in-vehicle equipment connected to each of the ECU terminals, and terminal association information including association information between each of the ECU terminals and each of the microcomputer terminals provided in each of the plurality of microcomputers. , obtain communication path information generated by the external device,
A program that causes the plurality of microcomputers to execute a process of applying the acquired communication path information to the plurality of microcomputers. an ECU terminal mounted on a vehicle, communicably connected to an external device located outside the vehicle, and connected to on-board equipment mounted on the vehicle; and a plurality of microcomputers that perform processing related to control of the on-board equipment. , a computer including a processing unit that performs processing related to communication between the plurality of microcomputers;
Based on ECU terminal information including input/output information with the in-vehicle equipment connected to each of the ECU terminals, and terminal association information including association information between each of the ECU terminals and each of the microcomputer terminals provided in each of the plurality of microcomputers. , obtain communication path information generated by the external device,
An information processing method that causes the plurality of microcomputers to execute a process of applying the acquired communication path information to the plurality of microcomputers.

Images