JP2004021680A - On-vehicle network system, on-vehicle electronic equipment, its control method, its control program and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-vehicle network system, on-vehicle electronic equipment, its control method, its control program and a recording medium for shortening the time required for the distribution of data when the distribution of data from master equipment to slave equipment is interrupted. <P>SOLUTION: When the distribution of an update program is interrupted, slave equipment 5 transmits interruption information for specifying the interrupted position of the update program to master equipment 3 at the time of resuming communication, and the master equipment 3 distributes the residual data of the update program from the interrupted position by referring to the received interruption information. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vehicle-mounted network system that distributes data from a master device to a slave device, a vehicle-mounted electronic device that functions as a master device, a vehicle-mounted electronic device that functions as a slave device, a control method for a vehicle-mounted electronic device, a control program, and a recording medium.
[0002]
[Prior art]
2. Description of the Related Art In general, there is known an in-vehicle network system in which a master device and a slave device are mounted as in-vehicle electronic devices in a vehicle, and a series of data can be distributed from the master device to a slave device via a network.
[0003]
As shown in FIG. 10, a slave device in this type of in-vehicle network system includes a microcomputer 107 and a memory 109. The memory 109 includes a RAM 111, software (application program), It is provided with a rewritable nonvolatile memory 113 (for example, flash memory) in which a program (PBL: Primary Boot Loader) and the like are stored.
[0004]
When upgrading the software version of the slave device, the master device transmits a signal indicating that the software update program is distributed to the slave device, and the microcomputer 107 operates the PBL in the slave device that has received the signal, A writing program (SBL: Secondary Boot Loader) for downloading a software update program as a series of data is received from the master device and developed in the RAM 111.
[0005]
Then, a software update program is downloaded from the master device based on the SBL developed in the RAM 111, and the application program on the flash memory 113 is rewritten.
[0006]
[Problems to be solved by the invention]
However, in the above-described in-vehicle network system, when the distribution of the update program as a series of data from the master device to the slave device is interrupted, for example, a problem (for example, noise failure) occurs when the update program is received, and the update is performed. When the distribution of the program is interrupted, the update program is distributed again from the first data, so that the control operation is simple but takes time.
[0007]
In particular, when the distribution of the update program from the master device to the slave device is interrupted, the slave device erases all the received data stored in the non-volatile memory, receives the update program again from the first data, and performs the non-volatile operation. There is a problem that it takes time to store in the memory.
[0008]
Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art, and to reduce the time required for data distribution when data distribution from a master device to a slave device is interrupted, It is to provide an in-vehicle electronic device, a control method thereof, a control program, and a recording medium.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, in an in-vehicle network system configured to include a master device and a slave device and configured to be able to deliver a series of data from the master device to the slave device via a network, the slave device includes: When the distribution of data is interrupted, when communication is resumed, the master device transmits interruption information specifying the interruption position of the series of data to the master device. , The remaining data of the series of data is distributed.
[0010]
In this case, the slave device, when the distribution of the series of data is interrupted, suspending information storage means for storing suspending information specifying a suspending position of the series of data, and restarting communication with the master device And transmitting means for transmitting the interruption information stored in the interruption information storage means to the master device, wherein the master device refers to the received interruption information and interrupts the remaining part of the series of data from the point of interruption. A distribution means for distributing data to the slave device may be provided.
[0011]
Further, the interruption information storage means may store the interruption information when a predetermined time has elapsed since the reception of the series of data was interrupted, assuming that the distribution was interrupted.
[0012]
Further, the slave device may include a data storage unit that stores the series of data distributed by the master device.
[0013]
Still further, the series of data is a software update program in the slave device, the interruption information stored in the interruption information storage unit includes version information of the update program stored in the data storage unit, The distribution unit compares the version information of the update program included in the received interruption information with the version information of the update program to be distributed, and if both version information match, the remaining update from the interrupted point is performed. The program may be distributed to the slave device.
[0014]
Further, the series of data is a software update program in the slave device, the interruption information stored in the interruption information storage means includes version information of the update program stored in the data storage means, The distribution unit compares the version information of the update program included in the received interruption information with the version information of the update program to be distributed, and if the two version information do not match, the distribution program updates the update program to be distributed. You may make it distribute to a slave apparatus.
[0015]
Further, the interruption information storage means may be a rewritable nonvolatile memory.
[0016]
Further, in a vehicle-mounted electronic device that functions as a master device that distributes a series of data to a slave device via a network, when receiving interruption information that is transmitted from the slave device and specifies an interruption position of the series of data, The apparatus further includes a distribution unit that distributes the remaining data of the series of data to the slave device from a position where the interruption was performed with reference to the interruption information.
[0017]
In this case, the series of data is a software update program in the slave device, and the distribution unit transmits the version information of the update program included in the received interruption information and the version information of the update program to be distributed. If the two pieces of version information match, the remaining update program may be delivered to the slave device from the interrupted point.
[0018]
Also, the series of data is a software update program in the slave device, and the distribution unit compares the version information of the update program included in the received interruption information with the version information of the update program to be distributed. If the version information does not match, the update program to be distributed may be distributed to the slave device.
[0019]
Further, in a vehicle-mounted electronic device that functions as a slave device that receives a series of data distributed from a master device via a network, when the distribution of the series of data is interrupted, the interruption position of the series of data is specified. And a transmission unit for transmitting the interruption information stored in the interruption information storage unit to the master device when communication with the master device is resumed.
[0020]
In this case, the interruption information storage unit may store the interruption information when a predetermined time has elapsed after the reception of the series of data has been interrupted, assuming that the distribution has been interrupted.
[0021]
Further, the interruption information storage means may be a rewritable nonvolatile memory.
[0022]
Also, in the control method of an in-vehicle electronic device that functions as a master device that distributes a series of data to a slave device via a network, receiving the interruption information transmitted from the slave device and specifying an interruption position of the series of data. The method further includes a receiving step and a distribution step of, when the interruption information is received, distributing the remaining data of the series of data to the slave device from a position where the interruption is performed with reference to the interruption information.
[0023]
In this case, the series of data is a software update program in the slave device, and the distributing step includes: updating program version information included in the interruption information received in the receiving step; The version information may be compared with each other, and if both versions information match, the remaining update program may be delivered to the slave device from the interrupted point.
[0024]
Further, the series of data is a software update program in the slave device, and the distributing step includes updating the version information of the update program included in the interruption information received in the receiving step and the version information of the update program to be distributed. And if the two version information do not match, the update program to be distributed may be distributed to the slave device.
[0025]
Also, in the control method of the vehicle-mounted electronic device that functions as a slave device that receives a series of data distributed from a master device via a network, when the distribution of the series of data is interrupted, the interruption of the series of data is stopped. A suspend information storing step of storing suspend information specifying a position; and a transmitting step of transmitting the suspend information stored in the suspend information storing step to the master device when resuming communication with the master device. And
[0026]
Also, in a control program that causes a computer to function as a control device that controls a master device that distributes a series of data to a slave device via a network, the control program is transmitted from the slave device and specifies an interruption position of the series of data. And receiving the interruption information, and when the interruption information is received, referring to the interruption information and distributing the remaining data of the series of data from the interruption point to the slave device.
[0027]
Further, in a control program that causes a computer to function as a control device that controls a slave device that receives a series of data distributed from a master device over a network, when the distribution of the series of data is interrupted, It is characterized in that interruption information for specifying an interruption position of the series of data is stored, and when the communication with the master device is resumed, the stored interruption information is transmitted to the master device.
[0028]
Further, the control program may be recorded on a computer-readable recording medium.
[0029]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0030]
FIG. 1 is a schematic diagram showing an in-vehicle network system according to the present embodiment. As shown in FIG. 1, the in-vehicle network system 1 includes a master device 3 and, for example, a plurality (for example, two) of slave devices 5, and these devices 3 and 5 are connected by a wired (bus) network. Is formed. This in-vehicle network system 1 is mounted on a vehicle. The master device 3 has a function of communicating with the slave device 5, and the slave device 5 has a function of communicating with the master device 3.
[0031]
The slave device 5 is, for example, an audio device or a video device, and has a function of receiving a series of data distributed by the master device 3. The in-vehicle network system 1 employs, for example, an in-vehicle bus standard using an optical fiber. Further, it is assumed that the master device 3 and the slave device 5 perform, for example, packet communication.
[0032]
Software (application program) is incorporated in the slave device 5, and the slave device 5 functions when the software operates.
[0033]
When the software version of the slave device 5 is upgraded, the master device 3 distributes (downloads) a software update program to the slave device 5.
[0034]
The master device 3 includes a microcomputer 4 (hereinafter, referred to as a “master device microcomputer”), and the master device microcomputer 4 controls a slave device 5 on a network. The master device 3 is configured to be able to read a software update program recorded on a recording medium (for example, a removable recording medium such as an optical disk). The master device microcomputer 4 controls the read update program to be distributed to the slave device 5.
[0035]
The slave device 5 includes a microcomputer 7 (hereinafter, “microcomputer”) and a memory 9. As shown in FIG. 2, the memory 9 includes a RAM 11 and a flash memory 13 and an EEPROM 15 as nonvolatile memories. This EEPROM 15 is an external memory.
[0036]
The flash memory 13 stores software (application program) for the slave device 5. The flash memory 13 stores a startup program (PBL: Primary Boot Loader) in advance. Further, an area (specific address) for storing specific data is secured in the flash memory 13.
[0037]
The software upgrade in the slave device 5 is performed, for example, by erasing all software in the flash memory 13 and storing the upgraded software (update program) in the flash memory 13.
[0038]
The RAM 11 stores a control program (SBL: Secondary Boot Loader) for downloading a software update program from the master device 3 and storing (writing) it in the flash memory 13. This SBL is downloaded from the master device 3.
[0039]
The microcomputer 7 of the slave device 5 performs control based on the PBL when the slave device 5 is started. Specifically, the microcomputer 7 controls the execution of the application program stored in the flash memory 13 based on the PBL, and stores (develops) the received SBL in the RAM 11 when upgrading the software. ) Control.
[0040]
After receiving the SBL, the microcomputer 7 performs control based on the SBL. Specifically, the microcomputer 7 controls to receive the update program distributed from the master device 3 and store it in the flash memory 13 based on the SBL.
[0041]
When the distribution of the update program is interrupted during the reception of the update program, for example, when the network is disconnected, the slave device 5 resets, that is, restarts and receives the update program again to receive the update program. 7.
[0042]
The determination as to whether or not the distribution of the update program has been interrupted is made by the microcomputer 7 in the slave device 5, and the next data is transmitted to the slave device 5 even if a predetermined time has elapsed since the reception of data in the slave device 5 was interrupted. When the data is not received (for example, when the data packet of the distributed update program is not received by the slave device 5 after a predetermined time has elapsed), it is determined that the distribution of the update program is interrupted.
[0043]
In the present embodiment, when the distribution of the update program is interrupted based on the SBL as the control program, the microcomputer 7 in the slave device 5 stores the interruption information for specifying the interruption position of the update program in the EEPROM 15. When the communication is resumed, that is, when the communication is restarted, the interruption information stored in the EEPROM 15 is transmitted to the master device 3. In other words, the microcomputer 7 in the slave device 5 controls to transmit the interruption information stored in the EEPROM 15 to the master device 3 when the distribution of the update program is interrupted and the communication with the master device 3 is established again. I do. For example, when the network is disconnected, the slave device 5 is reset (restarted) so that the slave device 5 is connected to the network again and communication with the master device 3 is established.
[0044]
More specifically, the EEPROM 15 stores interruption information including the start address of the interrupted update program stored in the flash memory 13 in the flash memory 13 and the size of the update program data stored in the flash memory 13. The update program is stored, and thereby the interruption position of the update program is specified.
[0045]
For example, as shown in FIG. 3, the EEPROM 15 stores start addresses “0XC0000” and “0XE0000”, and data sizes “0XFFFF” and “0X200” corresponding to these start addresses. . That is, the data of the update program stored in the flash memory 13 may be discontinuous in the flash memory 13. In this case, the EEPROM 15 stores a plurality of start addresses and the size of the data corresponding thereto. Is stored.
[0046]
Further, the interruption information stored in the EEPROM 15 includes, for example, a version number X as version information of the interrupted update program and a program name Y of the update program, as shown in FIG.
[0047]
The master device-side microcomputer 4 in the master device 3 refers to the received interruption information, and distributes the data of the remaining application programs to the slave device 5 from the interrupted location, for example, by using a ROM (not shown) or an EEPROM (not shown). Control is performed based on a control program recorded in the flash memory.
[0048]
Hereinafter, the operations of the master device 3 and the slave device 5 will be described in detail with reference to the sequence of FIG. It should be noted that when the master device 3 transmits and receives data, it is performed under the control of the master device microcomputer 4, and when the slave device 5 transmits and receives data, it is performed under the control of the microcomputer 7.
[0049]
First, when the master device 3 intends to transmit a software update program to any one of the slave devices 5, the master device 3 transmits a specific message (PBL operation) to the slave device 5 in order to operate the PBL in the slave device 5 that updates the software. (S1).
[0050]
This PBL operation signal is transmitted, for example, when a recording medium on which a software update program is recorded is set in the master device 3.
[0051]
The PBL operates in the slave device 5 that has received the PBL operation signal, and the slave device 5 transmits, to the master device 3, a signal indicating, for example, that the SBL data can be received. 3 transmits the SBL data to the slave device 5 (S2).
[0052]
The slave device 5 performs a reception process on the received SBL data so that the microcomputer 7 can operate based on the SBL (S3).
[0053]
More specifically, referring to the flowchart of FIG. 5, the slave device 5 receives SBL data (packet data) (S31), and the microcomputer 7 of the slave device 5 stores the received data in the RAM 11. It is developed (S32). Then, the microcomputer 7 determines whether or not the development of the SBL data in the RAM 11 has been completed (S33). In step S33, if the development of the SBL data in the RAM 11 has not been completed, the microcomputer 7 returns to step S31 to process the data. If the development of the SBL data in the RAM 11 has been completed in step S33, the data of the SBL Is completed, and the flow proceeds to the processing operation of the developed SBL.
[0054]
Next, in FIG. 4, the microcomputer 7 of the slave device 5 operates based on the SBL and performs interruption information confirmation processing for processing depending on whether interruption information is stored in the flash memory 13 (S4). An update program distribution request is made (S5).
[0055]
Specifically, referring to the flowchart of FIG. 6, the microcomputer 7 of the slave device 5 determines whether or not the interruption information is stored in the flash memory 13 (S41).
[0056]
If the interruption information is stored in step S41, the slave device 5 transmits an “OK” message indicating that the interruption information is stored and the interruption information to the master device 3 (S42). If the interruption information is not stored in step S41, the slave device 5 transmits a message “NG” indicating that the interruption information is not stored to the master device 3 (S43). That is, distribution of the update program is requested in steps S42 and S43.
[0057]
Next, in FIG. 4, when the master device 3 receives the update program distribution request from the slave device 5, the master device-side microcomputer 4 of the master device 3 distributes all the data of the update program or suspends. A distribution data confirmation process is performed to confirm whether or not to distribute the remaining data from the place where it has been performed (S6), and the master device 3 transmits a response message to the slave device 5 (S7).
[0058]
In the slave device 5 that has received the response message, the microcomputer 7 of the slave device 5 performs update program reception preparation processing such as erasing the flash memory 13 or confirming the start address of the flash memory 13 to receive the update program. (S8), the master device 3 distributes (downloads) the update program to the slave device 5 (S9).
[0059]
Specifically, in step S6 in FIG. 4, referring to the flowchart in FIG. 7, the master device 3 receives the message transmitted in step S42 or S43 in FIG. 6 (S61). The master device microcomputer 4 determines whether the received message corresponds to “OK” or “NG” (S62).
[0060]
If the message is “OK” in step S62, the master device-side microcomputer 4 updates the version information (version number) of the update program included in the received interruption information and the version information (version number) of the update program to be distributed. Are compared to determine whether or not both version information (version numbers) match (S63).
[0061]
Then, if the message is determined to be “NG” in step S62, or if it is determined to be inconsistent in step S63, the master device 3 transmits “NG” as a response message to the slave device 5 (S64; FIG. 4, the update program is distributed from the first data of the update program (S65; step S9 in FIG. 4). That is, normal download is performed.
[0062]
If it is determined in step S63 that they match, the master device 3 transmits “OK” to the slave device 5 as a response message (S66; step S7 in FIG. 4), and updates the data from the data at the location where the update program was interrupted. The remaining data of the program is distributed (S67; step S9 in FIG. 4).
[0063]
Referring to the flowchart of FIG. 8 in step S8 in FIG. 4, the slave device 5 receives the response message transmitted in step S7 (FIG. 4) (S81). The microcomputer 7 of the slave device 5 determines whether the received response message corresponds to “OK” or “NG” (S82), and if the received response message is “NG”, the flash memory 13 The software (application program) before the update stored in the program or the update program that has been interrupted and stored halfway is deleted (S83). If the response message is "OK", the update is continued from the interrupted point. Since the program is stored, it is left without being erased.
[0064]
In FIG. 4, when the slave device 5 receives the update program distributed in step S9, the microcomputer 7 of the slave device 5 performs a process of receiving the update program (S10).
[0065]
More specifically, referring to the flowchart shown in FIG. 9, the microcomputer 7 of the slave device 5 determines whether or not data (packet) of the update program has been received (S91). It is stored in the memory 13 (S92).
[0066]
It is preferable to transmit a response signal indicating that the data (packet) of the update program has been normally received to the master device 3. As a result, the master device 3 can transmit the next data (packet).
[0067]
Next, it is determined whether or not all data of the update program has been received (S93).
[0068]
In step S93, if the data reception in the slave device 5 has been completed, the microcomputer 7 of the slave device 5 stores data indicating that the update program has been received in the specific address of the flash memory 13 (S94).
[0069]
If the data reception by the slave device 5 has not been completed in step S94, the microcomputer 7 of the slave device 5 returns to step S91 to perform processing.
[0070]
In step S91, if data (packet) has not been received, that is, if data reception has been interrupted, the microcomputer 7 of the slave device 5 determines whether or not a reception time-out has occurred (S95). The reception timeout refers to a case where a predetermined period of time has elapsed after counting after the reception of the update program has been interrupted. If the reception timeout has occurred, it is considered that the distribution of the update program has been interrupted.
[0071]
If the reception time-out occurs in step S95, the microcomputer 7 of the slave device 5 refers to the flash memory 13, that is, the update program stored halfway, and refers to the interruption information (that is, the version as the version information of the update program). Then, the interruption information is stored in the EEPROM 15 (S96).
[0072]
In step S95, if the reception has not timed out, the microcomputer 7 of the slave device 5 returns to step S91 to perform processing.
[0073]
As shown in FIG. 4, when the interruption information is stored in the EEPROM 15 in step S96 in FIG. 9 or when the data indicating that the update program has been completely received is stored in the specific address of the flash memory 13 in step S94 in FIG. The microcomputer 7 of the slave device 5 resets (restarts) the slave device 5 (S11).
[0074]
In this case, when the slave device 5 is reset, the SBL developed in the RAM 11 is erased, and the PBL is activated again. By the processing operation of the PBL, it is determined whether or not data is stored at a specific address of the flash memory 13, and if data is stored at the specific address in step S94 in FIG. If it is executed and not stored, it is in a state of waiting for a PBL operation signal from the master device 3.
[0075]
When the slave device 5 is reset, it is preferable that a signal indicating the reset is transmitted to the master device 3. Thus, the master device 3 can recognize that the slave device 5 has been reset. Then, upon receiving the signal indicating that the master device 3 has been reset, the master device 3 can perform the operation from transmitting the PBL operation signal shown in FIG. 4 to the slave device 5 again.
[0076]
Note that, when the reception timeout occurs during the reception of the SBL data and the distribution of the SBL data is interrupted, the slave device 5 does not perform the operation of controlling the distribution from the interrupted position of the SBL, and the slave device 5 Reset to be delivered from the first data. That is, since the data amount of the SBL is smaller than the data amount of the update program and the time required for distribution is short (for example, about ten and several seconds), the time cost can be ignored.
[0077]
As described above, according to the present embodiment, when the distribution of the update program as a series of data is interrupted, the slave device 5 has the EEPROM 15 as the non-volatile memory that stores the interruption information for specifying the interruption position of the update program. And a microcomputer 7 for controlling the transmission of the interruption information stored in the EEPROM 15 to the master device 3 when the communication with the master device 3 is resumed. Since the microcomputer 4 is provided to control the distribution of the remaining data of the update program to the slave device 5 from the master device 3, the data distribution is required when the distribution of data from the master device 3 to the slave device 5 is interrupted. Time is reduced.
[0078]
Further, according to the present embodiment, when the master device 3 distributes (downloads) the update program as a series of data of the slave device 5 to the slave device 11, when the distribution of the update program is interrupted, the update program The control program (SBL) for transmitting the stored interruption information to the master device 3 when the communication with the master device 3 is resumed is transmitted to the slave device 5 because the interruption information that specifies the interruption position of the master device 3 is stored. Since the slave device 5 does not need to store the control program (SBL) in the flash memory 13 or the like in advance, the memory can be effectively used.
[0079]
Further, according to the present embodiment, since the interruption information is stored in the EEPROM 15 which is an external memory, it is not necessary to secure an area in the flash memory 13 for storing the interruption information.
[0080]
Further, according to the present embodiment, when the distribution of the update program as a series of data is interrupted, the slave device 5 refers to the flash memory 13 to create interrupt information, and stores the interrupt information in the EEPROM 15. Since the interruption information is stored and transmitted to the master device 3 when the communication is resumed, the interruption information is created on the master device 3 side based on the update program as a series of data distributed halfway, and the interruption information is generated. Compared to the case where the remaining data is distributed from the interrupted position with reference to the information, the data missing from the slave device 5 can be more accurately grasped on the master device 3 side.
[0081]
Note that, in the present embodiment, the master device compares the version information of the update program included in the received interruption information with the version information of the update program to be distributed, and if the both version information match, The case where the remaining update program is distributed to the slave device from the interrupted position has been described.However, the present invention is not limited to this, and the master device may update the version information and the program name of the update program included in the received suspend information. The version information and the program name of the update program to be distributed are compared with each other, and if both the version information matches and both program names match, the remaining update program is transferred to the slave device from the interrupted point. It's better if you distribute it . Further, when both version information do not match, or when both program names do not match, it is more preferable to distribute the update program to be distributed to the slave device.
[0082]
Further, in the present embodiment, the case where the master device and the slave device are connected by a wire (for example, an optical fiber) has been described. However, the present invention is not limited to this, and the case where the master device and the slave device communicate wirelessly. It may be.
[0083]
Also, in the present embodiment, a case has been described in which a control program for controlling the master device is stored in the ROM or the like in advance. However, these control programs are recorded on an external recording device such as a hard disk and activated. It is also possible to record these control programs on a removable recording medium such as an optical disk and install them, or to download and install them via a wireless network, for example. In the case of downloading, it is also possible to download each time it is executed. Further, a computer-readable recording medium such as a ROM may be configured to be replaceable.
[0084]
Further, in the present embodiment, a case has been described where a control program for controlling the slave device is downloaded from the slave device via the vehicle network and stored (developed) in the RAM, but the present invention is not limited to this. The control programs may be stored in advance in a ROM, an EEPROM, a flash memory, or the like. These control programs may be downloaded from a slave device via a vehicle network and stored in the EEPROM, a flash memory, or the like. It is also possible to record the program on an external recording device such as an external recording device and start the program, or to record these control programs on a removable recording medium such as an optical disk and install the program. Further, a computer-readable recording medium such as a ROM may be configured to be replaceable.
[0085]
As described above, the present invention has been described based on one embodiment, but the present invention is not limited to this.
[0086]
【The invention's effect】
According to the present invention, it is possible to reduce the time required for data distribution when data distribution from a master device to a slave device is interrupted.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing an embodiment of an in-vehicle network system according to the present invention.
FIG. 2 is a configuration diagram illustrating a slave device of FIG. 1;
FIG. 3 is a diagram illustrating interruption information stored in a slave device.
FIG. 4 is a sequence diagram showing operations of a master device and a slave device.
FIG. 5 is a flowchart showing an SBL data receiving process on the slave device side.
FIG. 6 is a flowchart showing the interruption information confirmation processing on the slave device side.
FIG. 7 is a flowchart illustrating a process of confirming data to be distributed on the master device side.
FIG. 8 is a flowchart showing a preparation process for receiving data to be distributed on the slave device side.
FIG. 9 is a flowchart showing a data receiving process on the slave device side.
FIG. 10 is a configuration diagram showing a conventional slave device.
[Explanation of symbols]
1 In-vehicle network system
3 Master device
4 Microcomputer
5 Slave devices
7 Microcomputer
9 Memory
11 RAM
13 Flash memory (data storage means)
15 EEPROM (interruption information storage means)

Claims (20)

In-vehicle network system comprising a master device and a slave device, and configured to be able to deliver a series of data from the master device to the slave device via a network,
The slave device, when the distribution of the series of data is interrupted, transmits to the master device interrupt information specifying a position where the series of data is interrupted when communication is resumed, and the master device receives the interrupt information. Wherein the remaining data of the series of data is distributed from the point of interruption with reference to. The in-vehicle network system according to claim 1,
When the distribution of the series of data is interrupted, the slave device stores interruption information that specifies an interruption position of the series of data,
When the communication with the master device is resumed, the transmission device for transmitting the interruption information stored in the interruption information storage unit to the master device,
The in-vehicle network system, wherein the master device includes a distribution unit that distributes remaining data of the series of data to the slave device from a position where the master device is interrupted with reference to the received interruption information. The in-vehicle network system according to claim 2,
The in-vehicle network system, wherein the interruption information storage means stores the interruption information when a predetermined time has elapsed after the interruption of reception of the series of data, assuming that the distribution has been interrupted. The in-vehicle network system according to claim 2 or 3,
The in-vehicle network system, wherein the slave device includes a data storage unit that stores the series of data distributed by the master device. The in-vehicle network system according to claim 4,
The series of data is a software update program in the slave device,
The interruption information stored in the interruption information storage unit includes version information of an update program stored in the data storage unit,
The distribution unit compares the version information of the update program included in the received interruption information with the version information of the update program to be distributed, and if both version information match, the remaining update from the interrupted point is performed. An in-vehicle network system for distributing a program to the slave device. The in-vehicle network system according to claim 4,
The series of data is a software update program in the slave device,
The interruption information stored in the interruption information storage unit includes version information of an update program stored in the data storage unit,
The distribution means compares the version information of the update program included in the received interruption information with the version information of the update program to be distributed, and if the two version information do not match, the update program to be distributed is determined. An in-vehicle network system for delivering to the slave device. The in-vehicle network system according to any one of claims 2 to 6,
The in-vehicle network system, wherein the interruption information storage means is a rewritable nonvolatile memory. In a vehicle-mounted electronic device that functions as a master device that distributes a series of data to a slave device via a network,
When the interruption information transmitted from the slave device and specifying the interruption position of the series of data is received, the remaining data of the series of data is distributed to the slave device from the interruption point with reference to the interruption information. An in-vehicle electronic device comprising a distribution unit. The vehicle-mounted electronic device according to claim 8,
The series of data is a software update program in the slave device,
The distribution unit compares the version information of the update program included in the received interruption information with the version information of the update program to be distributed, and if both version information match, the remaining update from the interrupted point is performed. An in-vehicle electronic device that distributes a program to the slave device. The vehicle-mounted electronic device according to claim 8,
The series of data is a software update program in the slave device,
The distribution means compares the version information of the update program included in the received interruption information with the version information of the update program to be distributed, and if the two version information do not match, the update program to be distributed is determined. An in-vehicle electronic device, wherein the electronic device is delivered to the slave device. In the in-vehicle electronic device functioning as a slave device that receives a series of data distributed from the master device via the network,
When the distribution of the series of data is interrupted, an interruption information storage unit that stores interruption information that specifies an interruption position of the series of data,
A transmission unit configured to transmit the interruption information stored in the interruption information storage unit to the master device when communication with the master device is resumed. The in-vehicle electronic device according to claim 11,
The in-vehicle electronic device according to claim 1, wherein the interruption information storage unit stores the interruption information when a predetermined time has elapsed after the reception of the series of data has been interrupted, assuming that the distribution has been interrupted. The in-vehicle electronic device according to claim 11 or 12,
The in-vehicle electronic device, wherein the interruption information storage unit is a rewritable nonvolatile memory. In a control method of an in-vehicle electronic device functioning as a master device that distributes a series of data to a slave device via a network,
A receiving step of receiving the interruption information transmitted from the slave device and specifying the interruption position of the series of data,
Receiving the interruption information, distributing the remaining data of the series of data to the slave device from the point of interruption with reference to the interruption information. Method. In the control method of the vehicle-mounted electronic device according to claim 14,
The series of data is a software update program in the slave device,
The distribution step compares the version information of the update program included in the interruption information received in the reception step with the version information of the update program to be distributed. And transmitting the remaining update program to the slave device. In the control method of the vehicle-mounted electronic device according to claim 14,
The series of data is a software update program in the slave device,
The distribution step compares the version information of the update program included in the interruption information received in the reception step with the version information of the update program to be distributed, and if both version information do not match, the distribution target And transmitting the update program to the slave device. In a control method of an in-vehicle electronic device that functions as a slave device that receives a series of data distributed from a master device via a network, when the distribution of the series of data is interrupted, the interruption position of the series of data is determined. A suspend information storing step of storing suspend information to be specified;
Transmitting a suspension information stored in the suspension information storing step to the master device when communication with the master device is resumed. In a control program that causes a computer to function as a control device that controls a master device that distributes a series of data to a slave device via a network,
Transmitted from the slave device, to receive the interruption information identifying the interruption position of the series of data,
A control program which, when receiving the interruption information, causes the slave device to distribute remaining data of the series of data from a position where the interruption was performed with reference to the interruption information. In a control program that causes a computer to function as a control device that controls a slave device that receives a series of data distributed from a master device via a network,
When the distribution of the series of data is interrupted, storing interruption information that specifies an interruption position of the series of data,
A control program for transmitting stored interruption information to the master device when communication with the master device is resumed. A computer-readable recording medium on which the control program according to claim 18 or 19 is recorded.

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