CN115277415A - LIN bus slave node online upgrading method and vehicle using same - Google Patents
LIN bus slave node online upgrading method and vehicle using same Download PDFInfo
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- CN115277415A CN115277415A CN202210895958.6A CN202210895958A CN115277415A CN 115277415 A CN115277415 A CN 115277415A CN 202210895958 A CN202210895958 A CN 202210895958A CN 115277415 A CN115277415 A CN 115277415A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
- H04L41/0813—Configuration setting characterised by the conditions triggering a change of settings
- H04L41/082—Configuration setting characterised by the conditions triggering a change of settings the condition being updates or upgrades of network functionality
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F8/00—Arrangements for software engineering
- G06F8/60—Software deployment
- G06F8/65—Updates
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40052—High-speed IEEE 1394 serial bus
- H04L12/40091—Bus bridging
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/085—Retrieval of network configuration; Tracking network configuration history
- H04L41/0853—Retrieval of network configuration; Tracking network configuration history by actively collecting configuration information or by backing up configuration information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0866—Checking the configuration
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40234—Local Interconnect Network LIN
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40267—Bus for use in transportation systems
- H04L2012/40273—Bus for use in transportation systems the transportation system being a vehicle
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Abstract
An online upgrade method of a LIN bus slave node and a vehicle using the same. The online upgrading method comprises the following steps: the remote information control unit acquires a data packet to be refreshed of the LIN bus slave node through internet connection; the central gateway unit acquires a data packet to be refreshed from the remote information control unit through a first vehicle-mounted bus; the vehicle body control unit enters a programming mode based on the triggering of the central gateway unit, acquires a data packet to be refreshed from the central gateway unit through the second vehicle-mounted bus in the programming mode, and exits the programming mode after receiving the data packet to be refreshed; the LIN bus slave node enters a refresh mode when detecting that configuration data are lost or not written and/or detecting that a refresh request signal of a vehicle body control unit serving as an LIN bus master node is true, receives a data packet to be refreshed from the vehicle body control unit through the LIN bus in the refresh mode, and exits the refresh mode after receiving the data packet to be refreshed and verifying the data packet to be refreshed correctly.
Description
Technical Field
The invention relates to an automobile online upgrading technology, in particular to an online upgrading method of a LIN bus slave node and a vehicle using the same.
Background
Actuators (actuators) and sensors (sensors) in a vehicle are generally connected to a higher-level Electronic Control Unit (ECU) through a LIN bus. The LIN bus is a single-Master multi-Slave communication mode, the actuators and the sensors are called LIN bus Slave nodes (Slave), and a superior electronic control unit is called a LIN bus Master node (Master).
Due to the limitation of the single-Master multi-slave communication mode of the LIN bus, a second Master node (Master) cannot be introduced to update programs or parameters of the slave nodes under the condition of normal communication of the whole vehicle. When the LIN bus Slave nodes need to be upgraded, the current common practice is to detach the LIN bus Slave nodes from the whole vehicle, then connect an upper computer (PC) through external diagnostic equipment to simulate a LIN bus Master node (Master) to diagnose the LIN bus Slave nodes (Slave), and then use a starter (Bootloader) to upgrade software or use diagnostic service to write in relevant parameters.
The existing upgrading mode for refreshing software and parameters under a line at least has the following problems: the refreshed LIN bus can be carried out only after the slave node is detached from the whole vehicle, and a large amount of labor cost is required to be invested in corresponding batch refreshing; the brushing cost is high, and a large amount of equipment cost needs to be invested; the brushing efficiency is low and is limited by the limit of the LIN bus transmission rate, and the average brushing period is about 10 minutes; the operation difficulty is high, and non-professional technicians cannot complete the operation; after-sales data is difficult to update, and iterative upgrade of functions cannot be completed.
Disclosure of Invention
The invention aims to provide an online upgrading method for a LIN bus slave node and a vehicle using The same, which can upgrade and update The LIN bus slave node in an OTA (Over The Air) online upgrading mode.
In order to solve the above problems, an aspect of the present invention provides an online upgrade method of a LIN bus slave node, adapted to perform online upgrade on one or more LIN bus slave nodes on a vehicle, the vehicle further including a telematics control unit, a central gateway unit, and a body control unit, the telematics control unit and the central gateway unit being connected by a first on-board bus, the central gateway unit and the body control unit being connected by a second on-board bus, the body control unit and the LIN bus slave node being connected by a LIN bus, comprising: the remote information control unit acquires a data packet to be refreshed of the LIN bus slave node through internet connection; the central gateway unit acquires the data packet to be refreshed from the remote information control unit through the first vehicle-mounted bus; the vehicle body control unit enters a programming mode based on the triggering of the central gateway unit, acquires the data packet to be refreshed from the central gateway unit through the second vehicle-mounted bus in the programming mode, and exits the programming mode after receiving the data packet to be refreshed; the LIN bus slave node enters a refresh mode when detecting that configuration data is lost or not written in and/or detecting that a refresh request signal of the vehicle body control unit serving as the LIN bus master node is true, receives the data packet to be refreshed from the vehicle body control unit through the LIN bus in the refresh mode, and exits the refresh mode after receiving the data packet to be refreshed and verifying the data packet to be refreshed correctly.
Another aspect of the present invention provides a vehicle, which includes a telematics control unit, a central gateway unit, a vehicle body control unit, and a LIN bus slave node, wherein the telematics control unit and the central gateway unit are connected by a first vehicle-mounted bus, the central gateway unit and the vehicle body control unit are connected by a second vehicle-mounted bus, the vehicle body control unit and the LIN bus slave node are connected by a LIN bus, and the vehicle performs online upgrade on the LIN bus slave node by the online upgrade method of the LIN bus slave node as described above.
Compared with the prior art, the scheme has the following advantages:
the method for online upgrading the LIN bus slave nodes realizes the data updating from the LIN bus master node to the LIN bus slave nodes, and can effectively solve the problem of batch refreshing of the LIN bus slave nodes (such as ECU and the like) data on the whole bus. Specifically, the online upgrade method of the LIN bus slave node can adopt an OTA-LIN TP (LIN transmission protocol) technology, complete the data upgrade of the LIN bus slave node (such as an ECU and the like) automatically in the whole process, and can meet the iterative update of after-sales functions. In addition, the data packets to be refreshed from the vehicle body control unit to the LIN bus slave node are sent in a data sub-packet mode, and an independent scheduling mode is adopted, so that the transmission efficiency is higher. In addition, the LIN bus slave node can perform self-checking on internal data, and functional failure caused by data loss or damage is prevented.
Drawings
Fig. 1 illustrates a schematic diagram of an online upgrade system of a LIN bus slave node in accordance with one or more embodiments of the present invention;
fig. 2 illustrates a schematic diagram of a method of online upgrade of a LIN bus slave node in accordance with one or more embodiments of the present invention;
FIG. 3 illustrates a timing diagram of a body control unit obtaining a data packet to be refreshed from a central gateway unit in accordance with one or more embodiments of the present invention;
fig. 4 illustrates a timing diagram of a LIN bus slave node obtaining a data packet to be refreshed from a body control unit in accordance with one or more embodiments of the present invention.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention to those of ordinary skill in the art. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without some of these specific details. Furthermore, it should be understood that the invention is not limited to the specific embodiments described. Rather, it is contemplated that the invention may be practiced with any combination of the following features and elements, whether or not they relate to different embodiments. Thus, the following aspects, features, embodiments and advantages are merely illustrative and should not be considered elements or limitations of the claims except where explicitly recited in a claim.
Fig. 1 illustrates a schematic diagram of an online upgrade system of a LIN bus slave node according to one or more embodiments of the present invention. Referring to fig. 1, the online upgrade system of the LIN bus slave node includes a vehicle 10 and a cloud server 20. The vehicle 10 may obtain data, such as packets to be refreshed for updating the LIN bus slave nodes, from a cloud server 20 via the internet connection 18. The cloud server 20 may be deployed by the manufacturer of the vehicle 10, for example, and provide corresponding OTA upgrade services. As another example, the cloud server 20 may be deployed by the provider of the LIN bus slave node and provide corresponding OTA upgrade services.
The vehicle 10 includes a Telematics Control Unit (TCU) 11, a central Gateway Unit (CGW) 12, a Body Control Unit (BCM) 13, and a plurality of LIN bus slave nodes 14 (14-1, 14-2, and 14-3). The telematics control unit 11 and the central gateway unit 12 are connected by a first onboard bus 15. The first onboard bus 15 may be any onboard bus, such as an ethernet bus, a CAN bus, a FlexRay bus, etc., and may preferably be an ethernet bus. The central gateway unit 12 and the body control unit 13 are connected 16 via a second vehicle bus. The second onboard bus 16 may be any onboard bus, such as an ethernet bus, a CAN bus, a FlexRay bus, etc., and may preferably be a CAN bus. Although only the central gateway unit 12 and the body control unit 13 are shown on the second onboard bus 16, it is understood that other electronic control units, such as meters, infotainment systems, etc., may also be present on the second onboard bus 16. The vehicle body control unit 13 and the plurality of LIN bus slave nodes 14 are connected by a LIN bus. In this embodiment, the body control unit 13 serves as a master node of the LIN bus. It should be noted that in the embodiment shown in fig. 1, there are three LIN bus slave nodes 14 on the LIN bus, but it is understood that the number of LIN bus slave nodes 14 may be any integer, for example, one, two, four, etc.
Fig. 2 illustrates a schematic diagram of an online upgrade method of a LIN bus slave node according to one or more embodiments of the present invention. The online upgrade method 30 of the LIN bus slave node is implemented, for example, for the LIN bus slave node 14 in the vehicle 10 shown in fig. 1. Referring to fig. 2, the online upgrade method 30 of the LIN bus slave node includes the following steps:
step 31: the remote information control unit acquires a data packet to be refreshed of the LIN bus slave node through internet connection;
step 32: the central gateway unit acquires a data packet to be refreshed from the remote information control unit through a first vehicle-mounted bus;
step 33: the vehicle body control unit enters a programming mode based on the triggering of the central gateway unit, acquires a data packet to be refreshed from the central gateway unit through the second vehicle-mounted bus in the programming mode, and exits the programming mode after receiving the data packet to be refreshed;
step 34: the LIN bus slave node enters a refresh mode when detecting that configuration data are lost or not written and/or detecting that a refresh request signal of a vehicle body control unit serving as an LIN bus master node is true, receives a data packet to be refreshed from the vehicle body control unit through the LIN bus in the refresh mode, and exits the refresh mode after receiving the data packet to be refreshed and verifying the data packet to be refreshed correctly.
In step 31, the telematics control unit 11 may obtain the data packet to be refreshed of the LIN bus slave node 14 via the internet connection 18. The internet connection 18 may include, for example, a 4G-LTE, 5G, wiFi, or like wireless connection.
In step 32, the central gateway unit 12 acquires the packet to be refreshed from the telematics control unit 11 through the first vehicle bus 15. Fig. 3 illustrates a timing diagram of a body control unit obtaining a data packet to be refreshed from a central gateway unit according to one or more embodiments of the present invention. As shown in fig. 3, after acquiring the data packet to be refreshed, the central gateway unit 12 also performs validity check on the data packet to be refreshed. In one or more embodiments, the validity check includes a version status information check and/or a data check value check. In one or more embodiments, it is detected whether the vehicle 10 meets software upgrade requirements, such as whether the vehicle state is stationary, whether the engine is off, etc., before the central gateway unit 12 triggers the body control unit 13 to enter the programming mode.
In step 33, the body control unit 13 enters the programming mode based on the trigger of the central gateway unit 12, acquires the data packet to be refreshed from the central gateway unit 12 through the second vehicle-mounted bus 16 in the programming mode, and exits the programming mode after receiving the data packet to be refreshed. As shown in fig. 3, in one or more embodiments, when the central gateway unit 12 triggers the body control unit 13 to enter the programming mode, the central gateway unit 12 unlocks the body control unit 13 and sets the programming request status flag to true. When the vehicle body control unit 13 detects that the programming request status flag is true, internal data upgrade condition detection is performed, and if the requirement is met, the programming status flag is set to true, and a programming mode is entered.
After the body control unit 13 enters the programming mode, the central gateway unit 12 starts a data download flow to download the refresh packet to the body control unit 13. That is, the body control unit 13 acquires the packet to be refreshed from the central gateway unit 12. In one or more embodiments, the body control unit 13 may obtain the data packet to be refreshed based on the bus diagnostic service. The bus diagnostic service may be, for example, a CAN bus diagnostic service as defined in ISO 14229.
After completing the data download process, the central gateway unit 12 causes the body control unit 13 to exit the programming mode. After the body control unit 13 exits the programming mode, the central gateway unit 12 sets the programming request status flag bit to false. In one or more embodiments, the body control unit 13 stores the acquired data packet to be refreshed in its non-volatile memory.
In step 34, the LIN bus slave node 14 enters a refresh mode when detecting that the configuration data is lost or not written and/or detecting that a refresh request signal of the vehicle body control unit 13 as the LIN bus master node is true, receives a data packet to be refreshed from the vehicle body control unit 13 through the LIN bus 17 in the refresh mode, and exits the refresh mode after receiving the data packet to be refreshed and verifying that the data packet to be refreshed is correct.
In one or more embodiments, the body control unit 13 includes a Normal (Normal) scheduling mode and a configuration (Config) scheduling mode. In one or more embodiments, the body control unit 13 also includes an Initial (Initial) state in which the body control unit 13 does not schedule. In one or more embodiments, the body control unit 13 defines the two scheduling modes and the initial state according to the requirements of the master node in the SAEJ26021 standard.
Fig. 4 illustrates a timing diagram of a LIN bus slave node obtaining a data packet to be refreshed from a body control unit in accordance with one or more embodiments of the present invention. As shown in fig. 4, the LIN bus slave node 14 enters the refresh mode upon detecting that the configuration data is lost or not written and/or receiving a refresh request signal of the body control unit 13 as the LIN bus master node, and sets the refresh mode flag to true. When detecting that the refresh mode flag is true, the vehicle body control unit 13 stops the normal scheduling mode, enters the configuration scheduling mode, and sends the data packet to be refreshed to the LIN bus slave node 14 in the configuration scheduling mode. In one or more embodiments, the vehicle body control unit 13 transmits a packet to be refreshed to the LIN bus slave node 14 through LIN TP (Transport Protocol) to improve reliability. In one or more embodiments, the data packet to be refreshed, which is sent to the LIN bus slave node 14, is read from a non-volatile memory in the body control unit 13.
In one or more embodiments, the body control unit 13 transmits the data packet to be refreshed to the LIN bus slave node 14 in the form of a data packet. In one or more embodiments, the data packet to be refreshed includes a Checksum (Checksum) and an identification code corresponding to each data sub-packet. In one or more embodiments, the LIN bus slave node 14 verifies whether the reception of the data packet to be refreshed is completed by using the identification code, and verifies the integrity of the data packet to be refreshed by using the checksum after confirming the completion of the reception. In one or more embodiments, the LIN bus slave node 14 verifies the checksum after each power-up or wake-up, and if the verification fails, the configuration data is set to be lost or unwritten to trigger entry into the refresh mode.
In one or more embodiments, the LIN bus slave node 14 exits the refresh mode upon completion of receiving the packet to be refreshed and verifying that the refresh packet is correct, and sets the refresh mode flag to false. When the vehicle body control unit 13 detects that the refresh mode flag is false, the configuration of the scheduling mode is stopped, and the normal scheduling mode is entered.
In one or more embodiments, when the body control unit 13 detects that the refresh mode flag is false when the LIN bus slave node 14 enters the refresh mode for detecting that the refresh request signal of the body control unit 13 is true, the refresh request signal is also set to false (not shown in the figure).
In one or more embodiments, the LIN bus slave node 14 may be a Power Window (Power Window) control unit.
The online upgrading method 30 for the LIN bus slave nodes realizes the data updating from the LIN bus master node to the LIN bus slave nodes, and can effectively solve the problem of batch refreshing of the LIN bus slave nodes (such as ECU and the like) data on the whole vehicle line. Specifically, the online upgrade method 30 for the LIN bus slave nodes may use an OTA-LIN TP (LIN transmission protocol) technology, and complete the data upgrade of the LIN bus slave nodes (e.g., ECUs, etc.) all the time automatically, which may satisfy the iterative update of the after-market functions. In addition, the data packets to be refreshed from the vehicle body control unit 13 to the LIN bus slave node 14 are sent in a data sub-packet mode, and an independent scheduling mode is adopted, so that the transmission efficiency is higher. In addition, the LIN bus slave node 14 can perform self-checking on internal data, and functional failure caused by data loss or damage is prevented.
Although the present invention has been described with reference to the preferred embodiments, it is not limited thereto. Various changes and modifications within the spirit and scope of the present invention will become apparent to those skilled in the art from this disclosure, and it is intended that the scope of the present invention be defined by the appended claims.
Claims (16)
1. An online upgrade method of LIN bus slave nodes, which is suitable for online upgrade of one or more LIN bus slave nodes on a vehicle, wherein the vehicle further comprises a remote information control unit, a central gateway unit and a vehicle body control unit, the remote information control unit and the central gateway unit are connected through a first vehicle-mounted bus, the central gateway unit and the vehicle body control unit are connected through a second vehicle-mounted bus, and the vehicle body control unit and the LIN bus slave nodes are connected through the LIN bus,
the remote information control unit acquires a data packet to be refreshed of the LIN bus slave node through internet connection;
the central gateway unit acquires the data packet to be refreshed from the remote information control unit through the first vehicle-mounted bus;
the vehicle body control unit enters a programming mode based on the triggering of the central gateway unit, acquires the data packet to be refreshed from the central gateway unit through the second vehicle-mounted bus in the programming mode, and exits from the programming mode after receiving the data packet to be refreshed;
the LIN bus slave node enters a refresh mode when detecting that configuration data is lost or not written and/or detecting that a refresh request signal of the vehicle body control unit serving as an LIN bus master node is true, receives the data packet to be refreshed from the vehicle body control unit through the LIN bus in the refresh mode, and exits the refresh mode after receiving the data packet to be refreshed and verifying the data packet to be refreshed correctly.
2. The method for the online upgrade of a slave node of a LIN bus of claim 1, wherein said central gateway unit performs a validity check on said data packet to be refreshed after acquiring said data packet to be refreshed.
3. The method for online upgrade of a slave node of a LIN bus according to claim 2, wherein said validity check comprises a version status information check and/or a data check value check.
4. The method for online upgrade of a LIN bus slave node of claim 1, wherein it is detected whether the vehicle meets software upgrade requirements before the central gateway unit triggers the body control unit to enter programming mode.
5. The method for the online upgrade of a LIN bus slave node according to claim 1, wherein, when the central gateway unit triggers the vehicle body control unit to enter a programming mode, the central gateway unit unlocks the vehicle body control unit and sets a programming request status flag to true, when the vehicle body control unit detects that the programming request status flag is true, internal data upgrade condition detection is performed, and if the requirement is met, the programming status flag is set to true, and the vehicle body control unit enters the programming mode.
6. The method for on-line upgrade of a LIN bus slave node of claim 5, wherein said central gateway unit sets said programming request status flag to false after said body control unit exits said programming mode.
7. The method for online upgrade of a slave node of a LIN bus of claim 1, wherein said body control unit obtains said data packet to be refreshed based on a bus diagnostic service.
8. The online upgrade method of a LIN bus slave node according to claim 1, wherein the body control unit that is the LIN bus master node comprises a normal scheduling mode and a configuration scheduling mode.
9. The online upgrade method for the LIN bus slave nodes according to claim 8, wherein the LIN bus slave nodes enter a refresh mode when detecting that configuration data is lost or not written and/or receiving a refresh request signal of the vehicle body control unit serving as the LIN bus master node, and set a refresh mode flag to be true, and when the vehicle body control unit detects that the refresh mode flag is true, the vehicle body control unit stops the normal scheduling mode, enters the configuration scheduling mode, and sends the data packets to be refreshed to the LIN bus slave nodes in the configuration scheduling mode.
10. The on-line upgrade method for the LIN bus slave node according to claim 9, wherein the LIN bus slave node exits the refresh mode after receiving the data packet to be refreshed and verifying that the refresh data packet is correct, and sets a refresh mode flag to false, and when the vehicle body control unit detects that the refresh mode flag is false, the vehicle body control unit stops the configuration scheduling mode and enters the normal scheduling mode.
11. The on-line upgrade method of a LIN bus slave node of claim 10, wherein when said LIN bus slave node enters a refresh mode for detecting that a refresh request signal of said body control unit is true, said body control unit further sets said refresh request signal to false when said body control unit detects that said refresh mode flag is false.
12. The on-line upgrade method of a LIN bus slave node according to claim 1, wherein the vehicle body control unit transmits the data packet to be refreshed to the LIN bus slave node in the form of data packetization.
13. The method for on-line upgrade of a slave node of a LIN bus of claim 12, wherein the data packets to be refreshed comprise a checksum and an identification code corresponding to each data packet.
14. The on-line upgrade method of a LIN bus slave node according to claim 13, wherein the LIN bus slave node verifies whether reception of the data packet to be refreshed is completed using the identification code, and verifies integrity of the data packet to be refreshed using the checksum after confirming that the reception is completed.
15. The method for on-line upgrade of a LIN bus slave node according to claim 13, wherein the LIN bus slave node verifies the checksum after each power-up or wake-up, and if verification fails, a configuration data loss or non-write is set to trigger entry into the refresh mode.
16. A vehicle comprising a telematics control unit, a central gateway unit, a body control unit and a LIN bus slave, the telematics control unit and the central gateway unit being connected by a first on-board bus, the central gateway unit and the body control unit being connected by a second on-board bus, the body control unit and the LIN bus slave being connected by a LIN bus, characterized in that the vehicle is upgraded online to the LIN bus slave by the method for online upgrade of a LIN bus slave according to any of claims 1 to 15.
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| CN113997887A (en) * | 2021-11-24 | 2022-02-01 | 一汽奔腾轿车有限公司 | Vehicle state checking system and method before OTA (over the air) upgrading |
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