CN112230948A

CN112230948A - Software upgrading method, device, system, vehicle and storage medium

Info

Publication number: CN112230948A
Application number: CN201910581931.8A
Authority: CN
Inventors: 汪江涛; 郝兴峰
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2019-06-30
Filing date: 2019-06-30
Publication date: 2021-01-15
Anticipated expiration: 2039-06-30
Also published as: CN112230948B

Abstract

The present disclosure relates to a software upgrading method, device, system, vehicle, and storage medium. The method is applied to vehicle-mounted electric control equipment connected to a whole vehicle CAN bus, and the resistance values of a first terminal resistor and a second terminal resistor connected to the whole vehicle CAN bus are both smaller than 120 omega, and the method comprises the following steps: receiving a first message sent by external upgrading equipment at a first communication rate; under the condition that the vehicle-mounted electronic control equipment is determined to be the target vehicle-mounted electronic control equipment according to the identification information, sending a response message to the upgrading equipment; if the response message is sent, receiving a second message sent by the upgrading equipment at a first communication speed; responding to the second message, and switching the communication rate to a second communication rate; and receiving the upgrading program sent by the upgrading equipment at a second communication speed, and installing the upgrading program. The communication speed CAN be increased from the first communication speed to the second communication speed on the basis of not replacing the CAN bus of the whole vehicle, the transmission of an upgrading program is accelerated, the software upgrading speed is increased, and the software upgrading time is shortened.

Description

Software upgrading method, device, system, vehicle and storage medium

Technical Field

The present disclosure relates to the field of vehicle technologies, and in particular, to a method, device, system, vehicle, and storage medium for software upgrade.

Background

With the development of vehicle electronic technology, vehicle intellectualization is higher and higher, and vehicle-mounted electric control equipment is more and more abundant in variety or quantity. The vehicle-mounted electric control equipment integrates software and a hardware structure, the vehicle-mounted electric control equipment can be optimized by upgrading the software of the vehicle-mounted electric control equipment, and the service performance and safety of a vehicle can be improved to a certain extent, so that the software of the vehicle-mounted electric control equipment is more and more frequently upgraded. Software upgrading of existing vehicle-mounted electric control equipment is mostly carried out based on CAN (Controller Area Network) Network communication in a vehicle. In an example, the upgrading device is connected to a CAN network in a vehicle from a diagnosis port to establish communication with the vehicle-mounted electric control device, so that software upgrading of the vehicle-mounted electric control device is realized. Because the speed of CAN network communication is slower, and the upgrading program needing to be transmitted is larger in the upgrading process, the software upgrading process of the conventional vehicle-mounted electric control equipment is slower, and the condition of explosive increase of data volume cannot be adapted.

Disclosure of Invention

The invention aims to provide a software upgrading method, equipment, a system, a vehicle and a storage medium, wherein the equipment is used for conveniently and quickly upgrading software of vehicle-mounted electric control equipment.

In order to achieve the above object, a first aspect of the present disclosure provides an entire vehicle CAN communication system, including: the OBD interface of connection on whole car CAN bus, a plurality of on-vehicle electrical equipment, first terminal resistance and second terminal resistance, wherein, the OBD interface is used for being connected to outside upgrading equipment whole car CAN bus is last so that upgrading equipment CAN with on-vehicle electrical equipment communicates, first terminal resistance with second terminal resistance sets up in the on-vehicle electrical equipment of difference, wherein, first terminal resistance with second terminal resistance's resistance all is less than 120 omega.

Optionally, the vehicle-mounted electric control apparatus is configured to: receiving a first message sent by the upgrading equipment at a first communication speed, wherein the first message comprises identification information of target vehicle-mounted electric control equipment to be upgraded at this time and indication information used for indicating other vehicle-mounted electric control equipment except the target vehicle-mounted electric control equipment in the plurality of vehicle-mounted electric control equipment to enter a dormant state; under the condition that the target vehicle-mounted electric control equipment is determined to be the target vehicle-mounted electric control equipment according to the identification information, sending a response message to the upgrading equipment; entering a dormant state according to the indication information under the condition that the target vehicle-mounted electric control equipment is determined not to be the target vehicle-mounted electric control equipment according to the identification information; the target vehicle-mounted electric control device is further used for: receiving a second message sent by the upgrading device at the first communication rate, wherein the second message is used for indicating the target vehicle-mounted electric control device to switch the communication rate to a second communication rate, and the second communication rate is greater than the first communication rate; responding to the second message, and switching the communication rate to the second communication rate; and receiving the upgrading program sent by the upgrading equipment at the second communication speed, and installing the upgrading program.

Optionally, the target on-board electric control device is further configured to: receiving an upgrade request sent by the upgrade device at the first communication rate, wherein the upgrade request comprises key information; verifying the key information in response to receiving the upgrade request; if the verification is successful, sending a verification success message to the upgrading equipment so that the upgrading equipment responds to the verification success message and sends the second message; and if the verification fails, sending a verification failure message to the upgrading equipment.

Optionally, the target on-board electric control device is further configured to: after the upgrading program is successfully installed, sending an upgrading completion message to the upgrading device; receiving a third message sent by the upgrading device at the second communication rate, wherein the third message is used for indicating the target vehicle-mounted electric control device to switch the communication rate to the first communication rate; and responding to the third message, and switching the communication rate to the first communication rate.

Optionally, the target on-board electric control device is further configured to: and if the upgrade program is failed to be installed, sending an upgrade failure message to the upgrade device.

Optionally, the other vehicle-mounted electric control device except the target vehicle-mounted electric control device is further configured to: receiving a fourth message sent by the upgrading device at the first communication rate, wherein the fourth message is used for indicating other vehicle-mounted electric control devices except the target vehicle-mounted electric control device in the plurality of vehicle-mounted electric control devices to wake up; and responding to the fourth message, and waking up.

The second aspect of the present disclosure provides a software upgrading method for a vehicle-mounted electronic control device, which is applied to the vehicle-mounted electronic control device connected to a vehicle CAN bus, wherein the resistances of a first terminal resistor and a second terminal resistor connected to the vehicle CAN bus are both less than 120 Ω, and the method includes: receiving a first message sent by external upgrading equipment connected to a finished automobile CAN bus through an OBD interface at a first communication speed, wherein the first message comprises identification information of target vehicle-mounted electric control equipment to be upgraded at this time and indication information used for indicating other vehicle-mounted electric control equipment connected to the finished automobile CAN bus except the target vehicle-mounted electric control equipment to enter a dormant state; under the condition that the target vehicle-mounted electric control equipment is determined to be the target vehicle-mounted electric control equipment according to the identification information, sending a response message to the upgrading equipment; entering a dormant state according to the indication information under the condition that the target vehicle-mounted electric control equipment is determined not to be the target vehicle-mounted electric control equipment according to the identification information; if the response message is sent, receiving a second message sent by the upgrading device at the first communication rate, wherein the second message is used for indicating the target vehicle-mounted electric control device to switch the communication rate to a second communication rate, and the second communication rate is greater than the first communication rate; responding to the second message, and switching the communication rate to the second communication rate; and receiving the upgrading program sent by the upgrading equipment at the second communication speed, and installing the upgrading program.

Optionally, the method further comprises: if the response message is sent, receiving an upgrading request sent by the upgrading equipment at the first communication speed, wherein the upgrading request comprises secret key information; verifying the key information in response to receiving the upgrade request; if the verification is successful, sending a verification success message to the upgrading equipment so that the upgrading equipment responds to the verification success message and sends the second message; and if the verification fails, sending a verification failure message to the upgrading equipment.

Optionally, the method further comprises: after the upgrading program is successfully installed, sending an upgrading completion message to the upgrading device; receiving a third message sent by the upgrading device at the second communication rate, wherein the third message is used for indicating the target vehicle-mounted electric control device to switch the communication rate to the first communication rate; and responding to the third message, and switching the communication rate to the first communication rate.

Optionally, the method further comprises: and if the upgrade program is failed to be installed, sending an upgrade failure message to the upgrade device.

Optionally, the method further comprises: if the vehicle-mounted electric control equipment enters the dormant state, receiving a fourth message sent by the upgrading equipment at the first communication rate, wherein the fourth message is used for indicating other vehicle-mounted electric control equipment except the target vehicle-mounted electric control equipment to wake up; and responding to the fourth message, and waking up.

The third aspect of the present disclosure provides a software upgrading method for a vehicle-mounted electronic control device, which is applied to an external upgrading device connected to a complete vehicle CAN bus through an OBD interface, wherein resistance values of a first terminal resistor and a second terminal resistor connected to the complete vehicle CAN bus are both less than 120 Ω, and the method includes: sending a first message at a first communication rate, wherein the first message comprises identification information of a target vehicle-mounted electric control device to be upgraded at this time and indication information for indicating other vehicle-mounted electric control devices connected to the whole vehicle CAN bus except the target vehicle-mounted electric control device to enter a dormant state; in response to receiving a response message sent by the target vehicle-mounted electric control equipment, sending a second message to the target vehicle-mounted electric control equipment at the first communication rate, wherein the second message is used for indicating the target vehicle-mounted electric control equipment to switch the communication rate to a second communication rate, and the second communication rate is greater than the first communication rate; and sending an upgrading program to the target vehicle-mounted electric control equipment at the second communication speed.

Optionally, the method further comprises: if the response message is not received, determining whether the response failure times exceed a first preset time; if the response failure times are determined not to exceed the first preset times, the step of sending the first message at the first communication rate is executed again; and if the response failure times are determined to exceed the first preset times, sending a fourth message at the first communication rate, wherein the fourth message is used for indicating other vehicle-mounted electric control equipment except the target vehicle-mounted electric control equipment to be awakened.

Optionally, before the step of sending the second message to the target vehicle-mounted electric control device at the first communication rate, the method further includes: in response to receiving a response message sent by the target vehicle-mounted electric control equipment, sending an upgrading request to the target vehicle-mounted electric control equipment at the first communication rate, wherein the upgrading request comprises secret key information, so that the target vehicle-mounted electric control equipment can verify the secret key information; responding to the received verification success message sent by the target vehicle-mounted electric control equipment, and executing the step of sending a second message to the target vehicle-mounted electric control equipment at the first communication rate; determining whether the verification failure times exceed a second preset time or not in response to receiving a verification failure message sent by the target vehicle-mounted electric control equipment; if the verification failure times are determined not to exceed the second preset times, the step of sending an upgrading request to the target vehicle-mounted electric control equipment at the first communication speed is executed again; and if the verification failure times are determined to exceed the second preset times, sending a fourth message at the first communication rate, wherein the fourth message is used for indicating other vehicle-mounted electric control equipment except the target vehicle-mounted electric control equipment to be awakened.

Optionally, the method further comprises: and in response to receiving an upgrade completion message sent by the target vehicle-mounted electric control equipment, sending a third message to the target vehicle-mounted electric control equipment at the second communication rate, wherein the third message is used for indicating the target vehicle-mounted electric control equipment to switch the communication rate to the first communication rate.

Optionally, the method further comprises: determining whether the upgrade failure times exceed a third preset time or not in response to receiving the upgrade failure message sent by the target vehicle-mounted electric control equipment; if the upgrade failure times are determined not to exceed the third preset times, re-executing the step of sending the upgrade program to the target vehicle-mounted electric control equipment at the second communication rate; and if the upgrade failure times exceed the third preset times, sending a third message to the target vehicle-mounted electric control equipment at the second communication rate, wherein the third message is used for indicating the target vehicle-mounted electric control equipment to switch the communication rate to the first communication rate.

Optionally, the method further comprises: and sending a fourth message at the first communication rate, wherein the fourth message is used for indicating other vehicle-mounted electric control equipment except the target vehicle-mounted electric control equipment to wake up.

The fourth aspect of the present disclosure provides a vehicle-mounted electronic control device, configured to be connected to a vehicle-mounted CAN bus, and configured to control operations of corresponding vehicle-mounted components, including: a memory having a computer program stored thereon; a processor for executing the computer program in the memory to implement the steps of the method provided by the second aspect of the disclosure.

The fifth aspect of the present disclosure provides an upgrade device, configured to be connected to a CAN bus of a vehicle through an OBD interface, including: a memory having a computer program stored thereon; a processor for executing the computer program in the memory to implement the steps of the method provided by the third aspect of the present disclosure.

A sixth aspect of the present disclosure provides a software upgrading system for a vehicle-mounted electronic control device, including: the whole vehicle CAN communication system provided by the first aspect of the disclosure; and the upgrading equipment provided by the fifth aspect of the disclosure is connected to the vehicle CAN bus through an OBD interface.

A seventh aspect of the present disclosure provides a vehicle including: the whole vehicle CAN communication system provided by the first aspect of the disclosure.

An eighth aspect of the present disclosure provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method provided by the second aspect of the present disclosure.

A ninth aspect of the present disclosure provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method provided by the third aspect of the present disclosure.

By adopting the technical scheme, the resistance values of the first terminal resistor and the second terminal resistor connected to the whole vehicle CAN bus are both less than 120 omega, so that the highest communication speed which CAN be borne by the whole vehicle CAN bus CAN be improved, and the purposes of improving the communication speed and not influencing normal communication on the basis of not replacing the whole vehicle CAN bus CAN be realized. In addition, in the software upgrading process of the vehicle-mounted electric control equipment, the communication speed of the target vehicle-mounted electric control equipment and the upgrading program can be increased from the first communication speed to the second communication speed, the transmission of the upgrading program is accelerated, the software upgrading speed is increased, and the software upgrading time is shortened. Moreover, the switching of the communication speed is automatically completed by the upgrading equipment, and manual additional operation is not needed, so that the software upgrading is more convenient and faster.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

fig. 1 is a schematic diagram of a vehicle CAN communication system according to an exemplary embodiment.

Fig. 2 is a flowchart illustrating a software upgrading method for an in-vehicle electronic control apparatus according to an exemplary embodiment.

Fig. 3 is a flowchart illustrating a software upgrading method of an in-vehicle electronic control apparatus according to another exemplary embodiment.

Fig. 4 is an interaction diagram between the vehicle-mounted electric control apparatus and the external upgrade apparatus in a software upgrade method of the vehicle-mounted electric control apparatus according to an exemplary embodiment.

FIG. 5 is a block diagram illustrating an electronic device in accordance with an example embodiment.

FIG. 6 is a block diagram illustrating an electronic device in accordance with another example embodiment.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

The utility model provides a whole car CAN communication system, this whole car CAN communication system CAN include: the On Board Diagnostic (OBD) interface connected to the whole vehicle CAN bus, a plurality of vehicle-mounted electric control devices, a first terminal resistor and a second terminal resistor, wherein the OBD interface is used for connecting an external upgrading device to the whole vehicle CAN bus so that the upgrading device CAN communicate with the vehicle-mounted electric control devices, the first terminal resistor and the second terminal resistor are arranged in different vehicle-mounted electric control devices, and the resistance values of the first terminal resistor and the second terminal resistor are both smaller than 120 omega. In addition, the number of the first termination resistors is at least one, and the number of the second termination resistors is at least one. When the number of the first terminals and the number of the second terminals are both multiple, multiple first terminal resistors are arranged in the same vehicle-mounted electric control equipment, multiple second terminal resistors are arranged in the same vehicle-mounted electric control equipment, and the multiple first terminal resistors and the multiple second terminal resistors are arranged in different vehicle-mounted electric control equipment. It should be noted that the connection manner of the plurality of first termination resistors may be in series connection and/or in parallel connection, and it is only necessary to ensure that the total resistance value formed by the plurality of first termination resistors after being connected in series and/or in parallel connection is less than 120 Ω. Similarly, the plurality of second termination resistors may be connected in series and/or in parallel, and it is only necessary to ensure that the total resistance value formed by the plurality of second termination resistors after being connected in series and/or in parallel is less than 120 Ω. In general, a whole vehicle communication system establishes communication connection based on a whole vehicle CAN bus. When high-frequency signals are transmitted, the signal wavelength is shorter than that of the whole vehicle CAN bus, and the signals form reflected waves at the tail end of the whole vehicle CAN bus to interfere the original signals, so that a terminal resistor needs to be arranged at the tail end of the whole vehicle CAN bus, and the high-frequency signals do not reflect after reaching the tail end of the whole vehicle CAN bus. In addition, based on the whole vehicle CAN bus communication principle, both ends of the whole vehicle CAN bus CAN normally work only by connecting terminal resistors. According to practical experience, two terminal resistors, namely a first terminal resistor and a second terminal resistor, are generally required to be arranged in a finished automobile CAN communication system. And, preferably, in order to achieve impedance perfect matching, the terminal resistor needs to have the same impedance as the entire vehicle CAN bus, and the resistance values of the first terminal resistor and the second terminal resistor CAN be empirically set to 120 Ω.

In general, the Rate of CAN network communication is lower than that of CAN fd (CAN with Flexible Data-Rate) network communication, and illustratively, the Rate of CAN network communication ranges from 0Mbps to 1Mbps, and the Rate of CAN fd network communication ranges from 1Mbps to 5 Mbps. Therefore, in the present disclosure, in order to increase the speed of software upgrade of the in-vehicle electronic control device, during the upgrade process, CAN communication may be switched to CANFD communication. It should be noted that the communication rate of the CAN network in the entire vehicle CAN communication system CAN only reach 500 Kbps.

The inventor considers that CANFD communication is not used on a vehicle in large-scale verification, vehicle-mounted communication systems of a plurality of vehicles are all in communication connection based on a whole vehicle CAN bus, the whole vehicle CAN bus cannot be replaced by the CANFD bus in a large scale, and the upgrading method for improving the communication rate without replacing the whole vehicle CAN bus is provided. However, since the rate of CANFD network communication is greater than the rate of CAN network communication, there is a need in this disclosure to increase the maximum communication rate that CAN be tolerated by the entire vehicle CAN bus.

The inventor finds in experiments that under the condition that the communication rate is 5Mbps and the terminal resistance is double 120 Ω, normal communication cannot be performed if a 500pF capacitor is added, and in practical application, the capacitance of a normal whole vehicle CAN bus is 40-70pF/m, that is, vehicle-mounted electric control equipment located 10 meters away from the whole vehicle CAN bus cannot perform normal communication. Therefore, it is impossible to directly switch to the CANFD network based on the existing CAN communication system. The CAN bus switching method and the CAN bus switching device CAN realize normal communication under the condition that the existing CAN bus is directly switched into the CAN FD network, reduce the resistance values of the first terminal resistor and the second terminal resistor, and improve the maximum communication speed which CAN be borne by the whole CAN bus. In addition, in general, data bits in a message transmitted in CAN network communication are only 8 bits, and data bits in a message transmitted in CAN fd network communication are 8 bits or 16 bits. However, CANFD network communication is very edge sensitive, and the purpose of reducing the falling edge can be achieved by reducing the resistance of the first and second termination resistors in the present disclosure.

Illustratively, when the resistance values of the first terminal resistor and the second terminal resistor are 120 Ω, the amplitude of the corresponding voltage signal is about 2.5V, when the resistance values of the first terminal resistor and the second terminal resistor are 60 Ω, the amplitude of the corresponding voltage signal is about 2.0V, when the resistance values of the first terminal resistor and the second terminal resistor are 40 Ω, the amplitude of the corresponding voltage signal is about 1.6V, when the resistance values of the first terminal resistor and the second terminal resistor are 30 Ω, the amplitude of the corresponding voltage signal is about 1.2V, and when the resistance values of the first terminal resistor and the second terminal resistor are 24 Ω, the amplitude of the corresponding voltage signal is about 1.0V. Therefore, the smaller the resistance values of the first terminal resistor and the second terminal resistor are, the smaller the amplitude of the corresponding voltage signal is, the smaller the rising edge and the falling edge of the signal are, and the better the signal quality during the CANFD network communication is ensured.

It should be noted that, the resistance values of the first termination resistor and the second termination resistor are related to the communication rate in the communication system, the length of the entire vehicle CAN bus in the communication system, and the like. The minimum value of the resistance values of the first terminal resistor and the second terminal resistor is not particularly limited, as long as the signals received by each vehicle-mounted electric control device in the communication system are free from abnormal fluctuation, and the communication system CAN pass the normal CAN communication test specification. Preferably, in order to prevent the transceiver from being unable to identify or misidentify the entire vehicle CAN bus signal in the strong interference environment, the amplitude of the voltage signal is not lower than 1.3V, i.e. the minimum value of the resistance values of the first terminal resistor and the second terminal resistor should be greater than 30 Ω.

Exemplarily, as shown in fig. 1, the entire vehicle CAN communication system includes: the OBD interface, three on-vehicle automatically controlled equipment, a first terminal resistance and a second terminal resistance of connection on whole car CAN bus. The OBD interface is used for connecting external upgrading equipment to a CAN bus of the whole automobile, the external upgrading equipment CAN be an intelligent diagnostic instrument, CAN directly run upgrading programs, CAN also be a computer and a mobile phone, and the like.

As shown in fig. 1, the three vehicle-mounted electric control devices are a target vehicle-mounted electric control device, a vehicle-mounted electric control device a and a vehicle-mounted electric control device B, respectively, and the target vehicle-mounted electric control device is a vehicle-mounted electric control device that needs to be upgraded this time. The OBD interface is used as a starting point of a whole vehicle CAN bus, the target vehicle-mounted electric control device is located at the farthest end of the whole vehicle CAN bus, and the vehicle-mounted electric control device B is located at the nearest section of the whole vehicle CAN bus, so that the target vehicle-mounted electric control device and the vehicle-mounted electric control device B are two physically farthest nodes on the whole vehicle CAN bus, therefore, in the figure 1, the first terminal resistor CAN be arranged in the target vehicle-mounted electric control device, and the second terminal resistor CAN be arranged in the vehicle-mounted electric control device B. As shown in fig. 1, the entire vehicle CAN bus includes CAN _ H and CAN _ L.

In addition, in order to be able to support both CAN network communication and CANFD network communication, the controllers and transceivers in the three onboard electric control devices in fig. 1 need to use controllers and transceivers compatible with CAN network communication and CANFD network communication. Therefore, in the present disclosure, the controller and the transceiver in the vehicle-mounted electronic control device are both the controller and the transceiver in the CANFD network communication, and the controller and the transceiver in each vehicle-mounted electronic control device are connected, and both ends of the transceiver are respectively connected to the CAN _ H line and the CAN _ L line of the CAN bus of the entire vehicle.

Fig. 2 is a flowchart illustrating a software upgrading method for a vehicle-mounted electronic control device according to an exemplary embodiment, where the method is applied to the vehicle-mounted electronic control device connected to a vehicle CAN bus in the vehicle CAN communication system, and resistance values of a first terminal resistor and a second terminal resistor connected to the vehicle CAN bus are both less than 120 Ω. As shown in fig. 2, the software upgrading method may include the following steps.

In step 21, a first message sent by an external upgrade device connected to a complete vehicle CAN bus through an OBD interface is received at a first communication rate. The first message comprises identification information of the target vehicle-mounted electric control equipment to be upgraded at this time and indication information for representing that other vehicle-mounted electric control equipment connected to the whole vehicle CAN bus except the target vehicle-mounted electric control equipment enters a dormant state.

Because the whole vehicle CAN communication system is communicated based on the CAN network before the vehicle-mounted electric control equipment is not upgraded, the first message is a CAN network communication message, and each vehicle-mounted electric control equipment connected to the whole vehicle CAN bus CAN receive the first message at a first communication speed. The first communication rate is a communication rate preset based on CAN network communication, and the range of the first communication rate is 0Mbps to 1 Mbps. For example, the first communication rate may be 500 Kbps.

Illustratively, table 1 shows a data segment format of a first packet. As shown in table 1, bit0 to bit5 in the first message represent identification information of the target vehicle-mounted electric control device, where the identification information may be an ID of the vehicle-mounted electric control device that is to be upgraded at this time, and each vehicle-mounted electric control device has a unique ID. The numbers of 0 to 63 (64 in total) CAN be represented by bits 0 to bit5, and under normal conditions, the number of the vehicle-mounted electric control devices included in the whole vehicle CAN communication system does not exceed 64, so that the first message shown in table 1 CAN meet the requirement of upgrading each vehicle-mounted electric control device. As shown in table 1, bit6 represents indication information indicating that other vehicle-mounted electric control devices connected to the entire vehicle CAN bus except for the target vehicle-mounted electric control device enter a sleep state. For example, the indication information that other vehicle-mounted electric control devices except the target vehicle-mounted electric control device enter the sleep state may be represented by 0, and bit6 is 0 as shown in table 1. Since it is not determined in step 21 that the target vehicle-mounted electronic control device is upgraded, that is, the communication rate has not been switched, bit7 in the first message may not be used for the time being, and may be marked as a reservation in table 1.

TABLE 1

In step 22, in the case where it is determined that the vehicle-mounted electronic control device itself is the target vehicle-mounted electronic control device based on the identification information, a response message is sent to the upgrade device.

In step 23, in the case that it is determined that the vehicle-mounted electronic control device is not the target vehicle-mounted electronic control device according to the identification information, the vehicle-mounted electronic control device enters a sleep state according to the indication information.

In the disclosure, a plurality of vehicle-mounted electronic control devices connected to a finished vehicle CAN bus may receive a first message, and then may determine whether each vehicle-mounted electronic control device is a target vehicle-mounted electronic control device according to identification information of the target vehicle-mounted electronic control device to be upgraded this time and identification information of the vehicle-mounted electronic control device included in the first message. If the vehicle-mounted electric control equipment is determined to be the target vehicle-mounted electric control equipment, step 22 is executed, and a response message is sent to the upgrading equipment, so that the upgrading equipment CAN know that the target vehicle-mounted electric control equipment to be upgraded exists in the whole vehicle CAN communication system. And if the vehicle-mounted electronic control device is determined not to be the target vehicle-mounted electronic control device, executing step 23, and entering a sleep state according to the indication information included in the first message. It is to be understood that when the in-vehicle electric control device enters the sleep state, the CAN network-based message transmitted on the CAN bus CAN still be received at the first communication rate, but the message cannot be sent out.

In step 24, if the response message is sent, the second message sent by the upgrade device is received at the first communication rate. The second message is used for indicating the target vehicle-mounted electric control equipment to switch the communication rate to a second communication rate, wherein the second communication rate is greater than the first communication rate.

In this disclosure, if the vehicle-mounted electronic control device sends the response message to the upgrade device, it indicates that the vehicle-mounted electronic control device is the target vehicle-mounted electronic control device, and the upgrade device may send the second message, so that the vehicle-mounted electronic control device may receive the second message at the first communication rate. It should be noted that, at this time, the entire vehicle CAN communication system still communicates with the CAN network, so the second message is still a message of CAN network communication, and a plurality of vehicle-mounted electronic control devices connected to the entire vehicle CAN bus CAN receive the second message.

Illustratively, table 2 shows a data segment format of the second packet. As shown in table 2, bits 0 to bit5 in the second message still represent the identification information of the target vehicle-mounted electric control device. bit6 may be unused for the time being (marked as reserved, as shown in Table 2) or may be 0. bit7 represents a network protocol switch flag bit. Illustratively, the flag corresponding to the CAN network protocol is 0, and the flag corresponding to the CANFD network protocol is 1. In the present disclosure, it is necessary to switch the communication protocol of the target vehicle-mounted electric control device from the CAN network protocol to the CAN fd network protocol, and therefore bit7 in table 2 is 1.

TABLE 2

In step 25, the communication rate is switched to the second communication rate in response to the second message.

As shown in table 2, bit7 of the second message is 1, when the target vehicle-mounted electronic control device receives the second message, the network communication protocol of the target vehicle-mounted electronic control device may be switched to the CANFD network protocol, and when other non-target vehicle-mounted electronic control devices receive the second message, since the identification information included in the second message is not matched with the identification information of the non-target vehicle-mounted electronic control device, no operation is performed. That is, after the second message is received, only the network communication protocol of the target vehicle-mounted electric control device in the entire vehicle CAN communication system is switched to the CANFD network protocol, and the network communication protocols of other vehicle-mounted electric control devices are still the CAN network protocol.

The method comprises the steps that a default second communication rate can be preset in the vehicle-mounted electric control equipment and the upgrading equipment, and when the CANFD network protocol is switched, the communication rate is switched from the first communication rate to the second communication rate. Wherein the second communication rate may range from 1Mbps to 5 Mbps. It should be noted that, as described above, the rate of CAN network communication in the entire vehicle CAN communication system is generally 500Kbps, that is, the first communication rate is 500 Kbps. The rate of CANFD network communication defaults to 1 Mbps. In the present disclosure, in order to avoid the drawback that the communication error is caused by the excessively fast communication rate, the second communication rate may be a default rate (1Mbps) of the CANFD network communication, or may be a value greater than the default rate, but may not be greater than twice the default rate at most, that is, the second communication rate may not be greater than 2Mbps at most.

Similarly, after the second message is received, only the communication rate of the target vehicle-mounted electric control device in the entire vehicle CAN communication system is switched to the second communication rate, and the communication rates of other vehicle-mounted electric control devices are still the first communication rate.

In step 26, the upgrade program transmitted by the upgrade apparatus is received at the second communication rate, and the upgrade program is installed.

It should be noted that the upgrade device sends the upgrade program based on the second communication rate, and correspondingly, the vehicle-mounted electric control device CAN only receive the upgrade program at the second communication rate, so that only the target vehicle-mounted electric control device in the entire vehicle CAN communication system CAN receive the upgrade program. After the target vehicle-mounted electric control equipment receives the upgrading program, the upgrading program can be further installed for upgrading.

Fig. 3 is a flowchart illustrating a software upgrading method for a vehicle-mounted electronic control device according to another exemplary embodiment, where the method is applied to an external upgrading device connected to a vehicle CAN bus through an OBD interface, and the resistance values of a first terminal resistor and a second terminal resistor connected to the vehicle CAN bus are both less than 120 Ω. As shown in fig. 3, the software upgrading method may include the following steps.

In step 31, a first message is transmitted at a first communication rate. The first message comprises an identification of the target vehicle-mounted electric control equipment to be upgraded at this time and indication information used for indicating other vehicle-mounted electric control equipment connected to the whole vehicle CAN bus except the target vehicle-mounted electric control equipment to enter a dormant state.

After a technician connects an external upgrading device to a finished vehicle CAN bus through an OBD interface, the upgrading device CAN send a first message to search a target vehicle-mounted electric control device to be upgraded in the finished vehicle CAN communication system and indicate other vehicle-mounted electric control devices which are not the target vehicle-mounted electric control device to enter a dormant state. The first message is shown in table 1, and the description is not repeated here.

In step 32, in response to receiving the response message sent by the target vehicle-mounted electric control device, sending a second message to the target vehicle-mounted electric control device at the first communication rate. The second message is used for indicating the target vehicle-mounted electric control equipment to switch the communication rate to a second communication rate, wherein the second communication rate is greater than the first communication rate.

After the vehicle-mounted electric control equipment in the whole vehicle CAN communication system receives the first message, if the vehicle-mounted electric control equipment is determined to be the target vehicle-mounted electric control equipment, a response message CAN be sent to the upgrading equipment, and when the upgrading equipment receives the response message, the upgrading equipment indicates that the target vehicle-mounted electric control equipment to be upgraded exists in the whole vehicle CAN communication system, and further the upgrading equipment still sends a second message at the first communication rate, so that the target vehicle-mounted electric control equipment switches the communication rate to the second communication rate according to the second message. The second message is shown in table 2, and the description is not repeated here.

In step 33, the upgrade program is transmitted to the target in-vehicle electric control apparatus at the second communication rate.

After the upgrade device sends the second message, the target vehicle-mounted electronic control device may switch the CAN network protocol to the CANFD network protocol based on the second message, and switch from the first communication rate to the second communication rate. Meanwhile, the upgrade apparatus may switch its own communication rate to the second communication rate. At the moment, in the whole vehicle CAN communication system, only the communication rate of the upgrading device and the target vehicle-mounted electric control device is the second communication rate, and when the upgrading device sends the upgrading program on the whole vehicle CAN bus at the second communication rate, only the target vehicle-mounted electric control device CAN receive the upgrading program.

Through the technical scheme, the resistance values of the first terminal resistor and the second terminal resistor connected to the whole vehicle CAN bus are less than 120 omega, so that the highest communication speed which CAN be borne by the whole vehicle CAN bus CAN be improved, and the purposes of improving the communication speed and not influencing normal communication on the basis of not replacing the whole vehicle CAN bus CAN be realized. In addition, in the software upgrading process of the vehicle-mounted electric control equipment, the communication speed of the target vehicle-mounted electric control equipment and the upgrading program can be increased from the first communication speed to the second communication speed, the transmission of the upgrading program is accelerated, the software upgrading speed is increased, and the software upgrading time is shortened. Moreover, the switching of the communication speed is automatically completed by the upgrading equipment, and manual additional operation is not needed, so that the software upgrading is more convenient and faster.

A detailed procedure of the software upgrading method of the vehicle-mounted electric control apparatus provided by the present disclosure will be described below with reference to fig. 4. Fig. 4 is an interaction diagram between a vehicle-mounted electronic control device and an external upgrade device in a software upgrade method for the vehicle-mounted electronic control device according to an exemplary embodiment, where the vehicle-mounted electronic control device is connected to a vehicle CAN bus, the external upgrade device is connected to the vehicle CAN bus through an OBD interface, and resistance values of a first terminal resistor and a second terminal resistor connected to the vehicle CAN bus are both less than 120 Ω. As shown in fig. 4, the method includes the following steps.

In step 401(31), the upgrade device sends a first message at a first communication rate. The first message comprises identification information of the target vehicle-mounted electric control equipment to be upgraded at this time and indication information used for indicating other vehicle-mounted electric control equipment connected to the whole vehicle CAN bus except the target vehicle-mounted electric control equipment to enter a dormant state.

In step 402(21), the vehicle-mounted electronic control device receives a first message sent by the upgrading device at a first communication rate.

In step 403(22), the vehicle-mounted electronic control device sends a response message to the upgrading device when determining that the vehicle-mounted electronic control device is the target vehicle-mounted electronic control device according to the identification information.

In step 404(23), the vehicle-mounted electric control device enters a sleep state according to the indication information when determining that the vehicle-mounted electric control device is not the target vehicle-mounted electric control device according to the identification information.

The specific implementation of steps 401 to 404 is shown in fig. 2 and 3, and will not be described herein.

In this disclosure, if there is a target vehicle-mounted electronic control device among a plurality of vehicle-mounted electronic control devices included in the entire vehicle CAN communication system, the target vehicle-mounted electronic control device sends a response message to the upgrade device after receiving the first message, and accordingly, the upgrade device receives the response message. If the target vehicle-mounted electric control equipment is not included, the vehicle-mounted electric control equipment does not send a response message, and the upgrading equipment does not receive the response message.

In an embodiment, if the upgrade apparatus does not receive the response information, it is determined whether the response failure times exceed a first preset time, and if it is determined that the response failure times do not exceed the first preset time, the step 401 is executed again. And if the response failure times are determined to exceed the first preset times, the upgrading equipment sends a fourth message at the first communication speed. And the fourth message is used for indicating other vehicle-mounted electric control equipment except the target vehicle-mounted electric control equipment to wake up. Illustratively, the first preset number of times may be 10 times.

Specifically, when the response failure times exceed a first preset time, it is indicated that the target vehicle-mounted electronic control device to be upgraded at this time does not exist in the plurality of vehicle-mounted electronic control devices included in the entire vehicle CAN communication system, or the target vehicle-mounted electronic control device exists, but the target vehicle-mounted electronic control device cannot be upgraded normally. At this time, other vehicle-mounted electric control equipment except the target vehicle-mounted electric control equipment CAN be awakened by sending the fourth message, so that the vehicle-mounted electric control equipment CAN continue to normally communicate in the entire vehicle CAN communication system at the first communication speed under the CAN network protocol. The fourth packet will be described in detail below.

In another embodiment, if the upgrade apparatus receives the response information, step 405 is performed.

In step 405, the upgrading device sends an upgrading request to the target vehicle-mounted electric control device at a first communication rate in response to receiving the response message sent by the target vehicle-mounted electric control device. The upgrade request includes key information so that the target vehicle-mounted electronic control device can verify the key information.

In the disclosure, after receiving the response message sent by the target vehicle-mounted electronic control device, the upgrading device further needs to send an upgrading request to the target vehicle-mounted electronic control device to obtain the authority to upgrade the target vehicle-mounted electronic control device.

In step 406, the in-vehicle electronic control device receives the upgrade request transmitted by the upgrade device at a first communication rate.

In step 407, the in-vehicle electronic control device verifies the key information in response to receiving the upgrade request.

Specifically, the upgrade request includes key information, where the key information may be a character string pre-stored in the target vehicle-mounted electronic control device, and when the target vehicle-mounted electronic control device receives the key information included in the upgrade request, the target vehicle-mounted electronic control device compares the character string with the character string stored in the target vehicle-mounted electronic control device, if the character string is consistent with the character string stored in the target vehicle-mounted electronic control device, the verification is successful, step 408 is executed, and if the verification is failed, a verification failure message is sent to the upgrade device.

In one embodiment, if the verification fails, a verification failure message is sent to the upgrade device. The upgrading device receives the verification failure message, and determines whether the verification failure times exceed a second preset time in response to receiving the verification failure message sent by the target vehicle-mounted electric control device, wherein the second preset time may be 10 times, for example. If it is determined that the verification failure times do not exceed the second preset times, the step 405 is continuously executed. If the verification failure times exceed the second preset times, the upgrading device does not obtain the authority of upgrading the target vehicle-mounted electric control device, at this time, the upgrading device CAN send a fourth message at the first communication rate, and other vehicle-mounted electric control devices except the target vehicle-mounted electric control device are awakened to enable the vehicle-mounted electric control devices to continue to normally communicate in the entire vehicle CAN communication system at the first communication rate under the CAN network protocol.

In step 408, if the verification is successful, the vehicle-mounted electronic control device sends a verification success message to the upgrading device.

In step 409, the upgrading device sends a second message to the target vehicle-mounted electric control device at the first communication rate in response to receiving the verification success message sent by the target vehicle-mounted electric control device.

In another embodiment, if the verification is successful, the vehicle-mounted electronic control device sends a verification success message to the upgrading device, that is, the upgrading device is authorized to upgrade the vehicle-mounted electronic control device. And when the upgrading equipment receives the verification success message sent by the target vehicle-mounted electric control equipment, the upgrading equipment obtains the authority for upgrading the target vehicle-mounted electric control equipment. At this time, a second message may be sent to instruct the target vehicle-mounted electronic control device to switch the communication rate to the second communication rate. The second message is shown in table 2, and the description is not repeated here.

In step 410(24), the target vehicle-mounted electronic control device receives the second message at the first communication rate.

In step 411(25), the target vehicle-mounted electronic control device switches the communication rate to the second communication rate in response to the second message.

In step 412(33), the upgrading device sends the upgrading program to the target vehicle-mounted electric control device at the second communication speed.

In step 413(26), the target vehicle-mounted electronic control device receives the upgrading program sent by the upgrading device at the second communication rate, and installs the upgrading program.

The specific implementation of the above steps 410 to 416 is shown in fig. 2 and 3, and is not described herein again.

In order to enable the upgrading device to switch the communication rate of the target vehicle-mounted electric control device to the first communication rate by sending the third message after the target vehicle-mounted electric control device is upgraded, in the disclosure, the target vehicle-mounted electric control device needs to feed back an upgrading result to the upgrading device.

Specifically, when the upgrade program sends the upgrade program to the target vehicle-mounted electric control device, each subprogram included in the upgrade program is sequentially sent to the target vehicle-mounted electric control device according to a preset sequence. The first and last transmitted subroutines have stored therein the check data. Therefore, when the target vehicle-mounted electric control equipment receives the subprogram transmitted for the first time, the verification data can be obtained, when the subprogram transmitted for the last time is received, the verification data can also be obtained, and if the verification data obtained twice are consistent, the upgrading program can be considered to be installed successfully. Otherwise, the installation of the upgrade program fails. It should be noted that the target vehicle-mounted electronic control device may also determine whether the upgrade program is successfully installed based on other manners.

In one embodiment, if the target vehicle-mounted electric control device fails to install the upgrading program, an upgrading failure message is sent to the upgrading device. In this way, the upgrading device may receive the upgrade failure message, and determine whether the number of upgrade failures exceeds a third preset number in response to receiving the upgrade failure message sent by the target vehicle-mounted electric control device, where the third preset number may be, for example, 10. If it is determined that the upgrade failure times do not exceed the third preset times, the step 412 is executed again. If it is determined that the upgrade failure times exceed the third preset number, the following step 415 is performed. In this embodiment, if it is determined that the number of upgrade failures exceeds the third preset number, the upgrade device is abandoned from upgrading the target vehicle-mounted electronic control device, at this time, the upgrade may be ended, and the communication rate of the target vehicle-mounted electronic control device is switched to the first communication rate.

In step 414, after the target vehicle-mounted electronic control device successfully installs the upgrade program, it sends an upgrade complete message to the upgrade device.

In another embodiment, if the upgrade program is installed successfully, the target vehicle-mounted electronic control device sends an upgrade completion message to the upgrade device, so that after the upgrade device receives the upgrade completion message, it can be known that the upgrade of the target vehicle-mounted electronic control device is completed, and at this time, the upgrade device may execute step 415.

In step 415, in response to receiving the upgrade complete message sent by the target vehicle-mounted electric control device, the upgrade device sends a third message to the target vehicle-mounted electric control device at the second communication rate, where the third message is used to instruct the target vehicle-mounted electric control device to switch the communication rate to the first communication rate.

When the upgrading device learns that the target vehicle-mounted electric control device is successfully upgraded or when the upgrading failure times are determined to exceed the third preset times, the target vehicle-mounted electric control device is upgraded, and at the moment, in order to ensure that each vehicle-mounted electric control device in the whole vehicle CAN communication system CAN normally communicate, the communication rate needs to be switched to the first communication rate.

In this disclosure, the upgrade device is a message sent under CANFD network communication, and the third message is a message of CANFD network communication. Illustratively, table 3 shows a data segment format of a third packet. As shown in table 3, the data segment of the third packet includes 16 bits, where bits 0 to bit5 represent identification information of the target vehicle-mounted electronic control device, bits 6, bit8 to bit15 may be temporarily unused, and are marked as reserved in table 3, and bit7 is a network protocol switching flag bit. For example, if the flag corresponding to the CAN network protocol is 0 and the flag corresponding to the CAN fd network protocol is 1, in this disclosure, as shown in table 3, this bit7 is 0.

TABLE 3

In step 416, the target vehicle-mounted electronic control device receives the third message sent by the upgrading device at the second communication rate.

In the process of switching the communication rate to the first communication rate, the target vehicle-mounted electronic control device and the upgrade device still perform communication based on the second communication rate, so in step 416, the target vehicle-mounted electronic control device receives the third message sent by the upgrade device at the second communication rate.

In step 417, the target vehicle-mounted electric control device switches the communication rate to the first communication rate in response to the third message.

And when the target vehicle-mounted electric control terminal receives the third message, switching the CAN FD network protocol to the CAN network protocol according to the network protocol switching zone bit of bit7 in the third message. It should be noted that, when the CAN fd network protocol is switched to the CAN network protocol, correspondingly, the communication rate may be switched from the second communication rate corresponding to the CAN fd network protocol to the first communication rate corresponding to the CAN network protocol.

In step 418, the upgrade device transmits a fourth message at the first communication rate. The fourth message is used for indicating other vehicle-mounted electric control equipment except the target vehicle-mounted electric control equipment to wake up.

After the communication rate of the target device is switched to the first communication rate, the entire vehicle CAN communication system performs communication based on a CAN network protocol, and at this time, the upgrading device may send a fourth message at the first communication rate, where the fourth message is used to instruct other vehicle-mounted electronic control devices except the target vehicle-mounted electronic control device to wake up. The fourth message is a message of CAN network communication, and a plurality of vehicle-mounted electric control devices connected to a CAN bus of the whole vehicle CAN receive the fourth message.

Illustratively, table 4 shows a data segment format of a fourth packet. As shown in table 4, bits 0 to bit5 of the fourth message still represent the identification information of the target vehicle-mounted electronic control device. bit6 represents the indication information for waking up other vehicle-mounted electric control devices except the target vehicle-mounted electric control device, for example, 1 may be used to represent the indication information for waking up other vehicle-mounted electric control devices except the target vehicle-mounted electric control device, as shown in table 4, bit6 is 1. bit7 may be unused for a while, marked as reserved in Table 4.

TABLE 4

In step 419, if the vehicle-mounted electronic control device enters the sleep state, the fourth message sent by the upgrade device is received at the first communication rate.

In step 420, the vehicle-mounted electric control device wakes up in response to the fourth message.

As described above, the vehicle-mounted electric control device can also receive information in the sleep state, so in the present disclosure, after the vehicle-mounted electric control device enters the sleep state, the fourth message sent by the upgrade device can still be received at the first communication rate, and after the fourth message is received, the vehicle-mounted electric control device wakes up according to the identification information of the target vehicle-mounted electric control device represented by bit0 to bit5 and the indication information represented by bit6 for waking up other vehicle-mounted electric control devices except the target vehicle-mounted electric control device. Specifically, whether the identification information of the vehicle-mounted electric control equipment is consistent with the identification information of the target vehicle-mounted electric control equipment represented by bit 0-bit 5 or not is detected, and if not, the vehicle-mounted electric control equipment is awakened according to the mark in bit 6. If the identification information of the vehicle-mounted electric control equipment is consistent with the identification information of the target vehicle-mounted electric control equipment represented by bit 0-bit 5, no operation is executed.

It should be noted that the software upgrading method provided by the present disclosure may be applied to other systems using CAN network communication besides the entire vehicle CAN communication system.

Based on the same inventive concept, the present disclosure also provides a software upgrading system of a vehicle-mounted electronic control device, comprising: the whole vehicle CAN communication system provided by the disclosure; and the upgrading equipment provided by the disclosure is connected to the whole vehicle CAN bus through an OBD interface.

Based on the same inventive concept, the invention also provides a vehicle which comprises the whole vehicle CAN communication system provided by the invention.

FIG. 5 is a block diagram illustrating an electronic device in accordance with an example embodiment. The electronic equipment is vehicle-mounted electric control equipment. As shown in fig. 5, the electronic device 500 may include: a processor 501 and a memory 502. The electronic device 500 may also include one or more of a multimedia component 503, an input/output (I/O) interface 504, and a communication component 505.

The processor 501 is configured to control the overall operation of the electronic device 500, so as to complete all or part of the steps in the software upgrading method applied to the vehicle-mounted electronic control device. The memory 502 is used to store various types of data to support operation at the electronic device 500, such as instructions for any application or method operating on the electronic device 500 and application-related data, such as contact data, messaging, pictures, audio, video, and so forth. The Memory 502 may be implemented by any type of volatile or non-volatile Memory device or combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk or optical disk. The multimedia component 503 may include a screen and an audio component. Wherein the screen may be, for example, a touch screen and the audio component is used for outputting and/or inputting audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may further be stored in the memory 502 or transmitted through the communication component 505. The audio assembly also includes at least one speaker for outputting audio signals. The I/O interface 504 provides an interface between the processor 501 and other interface modules, such as a keyboard, mouse, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 505 is used for wired or wireless communication between the electronic device 500 and other devices. Wireless Communication, such as Wi-Fi, bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination of one or more of them, which is not limited herein. The corresponding communication component 505 may thus comprise: Wi-Fi module, Bluetooth module, NFC module, etc.

In an exemplary embodiment, the electronic Device 500 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the software upgrading method applied to the vehicle-mounted electric control Device.

In another exemplary embodiment, there is also provided a computer-readable storage medium including program instructions which, when executed by a processor, implement the steps of the software upgrade method applied to the in-vehicle electric control apparatus described above. For example, the computer readable storage medium may be the memory 502 described above including program instructions that are executable by the processor 501 of the electronic device 500 to perform the software upgrading method described above as applied to the vehicle-mounted electric control device.

FIG. 6 is a block diagram illustrating an electronic device in accordance with an example embodiment. The electronic equipment is external upgrading equipment. As shown in fig. 6, the electronic device 600 may include: a processor 601 and a memory 602. The electronic device 600 may also include one or more of a multimedia component 603, an input/output (I/O) interface 604, and a communications component 605.

The processor 601 is configured to control the overall operation of the electronic device 600, so as to complete all or part of the steps in the software upgrading method applied to the upgrading device. The memory 602 is used to store various types of data to support operation at the electronic device 600, such as instructions for any application or method operating on the electronic device 600 and application-related data, such as contact data, transmitted and received messages, pictures, audio, video, and so forth. The Memory 602 may be implemented by any type of volatile or non-volatile Memory device or combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk or optical disk. The multimedia component 503 may include a screen and an audio component. Wherein the screen may be, for example, a touch screen and the audio component is used for outputting and/or inputting audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may further be stored in the memory 602 or transmitted through the communication component 605. The audio assembly also includes at least one speaker for outputting audio signals. The I/O interface 604 provides an interface between the processor 601 and other interface modules, such as a keyboard, mouse, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 605 is used for wired or wireless communication between the electronic device 600 and other devices. Wireless Communication, such as Wi-Fi, bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination of one or more of them, which is not limited herein. The corresponding communication component 605 may therefore include: Wi-Fi module, Bluetooth module, NFC module, etc.

In an exemplary embodiment, the electronic Device 600 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the software upgrading method applied to the upgrading Device.

In another exemplary embodiment, there is also provided a computer readable storage medium comprising program instructions which, when executed by a processor, implement the steps of the software upgrade method applied to an upgrade apparatus described above. For example, the computer readable storage medium may be the above-mentioned memory 602 comprising program instructions executable by the processor 601 of the electronic device 600 to perform the above-mentioned software upgrade method applied to the upgrade device.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. The utility model provides a whole car CAN communication system which characterized in that includes:

the OBD interface of connection on whole car CAN bus, a plurality of on-vehicle electrical equipment, first terminal resistance and second terminal resistance, wherein, the OBD interface is used for being connected to outside upgrading equipment whole car CAN bus is last so that upgrading equipment CAN with on-vehicle electrical equipment communicates, first terminal resistance with second terminal resistance sets up in the on-vehicle electrical equipment of difference, wherein, first terminal resistance with second terminal resistance's resistance all is less than 120 omega.

2. The system of claim 1, wherein the onboard electronic control device is configured to:

receiving a first message sent by the upgrading equipment at a first communication speed, wherein the first message comprises identification information of target vehicle-mounted electric control equipment to be upgraded at this time and indication information used for indicating other vehicle-mounted electric control equipment except the target vehicle-mounted electric control equipment in the plurality of vehicle-mounted electric control equipment to enter a dormant state;

under the condition that the target vehicle-mounted electric control equipment is determined to be the target vehicle-mounted electric control equipment according to the identification information, sending a response message to the upgrading equipment;

entering a dormant state according to the indication information under the condition that the target vehicle-mounted electric control equipment is determined not to be the target vehicle-mounted electric control equipment according to the identification information;

the target vehicle-mounted electric control device is further used for:

receiving a second message sent by the upgrading device at the first communication rate, wherein the second message is used for indicating the target vehicle-mounted electric control device to switch the communication rate to a second communication rate, and the second communication rate is greater than the first communication rate;

responding to the second message, and switching the communication rate to the second communication rate;

and receiving the upgrading program sent by the upgrading equipment at the second communication speed, and installing the upgrading program.

3. The system of claim 2, wherein the target onboard electronic control device is further configured to:

receiving an upgrade request sent by the upgrade device at the first communication rate, wherein the upgrade request comprises key information;

verifying the key information in response to receiving the upgrade request;

if the verification is successful, sending a verification success message to the upgrading equipment so that the upgrading equipment responds to the verification success message and sends the second message;

and if the verification fails, sending a verification failure message to the upgrading equipment.

4. The system of claim 2, wherein the target onboard electronic control device is further configured to:

after the upgrading program is successfully installed, sending an upgrading completion message to the upgrading device;

receiving a third message sent by the upgrading device at the second communication rate, wherein the third message is used for indicating the target vehicle-mounted electric control device to switch the communication rate to the first communication rate;

and responding to the third message, and switching the communication rate to the first communication rate.

5. The system of claim 2, wherein the target onboard electronic control device is further configured to:

and if the upgrade program is failed to be installed, sending an upgrade failure message to the upgrade device.

6. The system according to claim 2, wherein the other on-board electronic control devices other than the target on-board electronic control device are further configured to:

receiving a fourth message sent by the upgrading device at the first communication rate, wherein the fourth message is used for indicating other vehicle-mounted electric control devices except the target vehicle-mounted electric control device in the plurality of vehicle-mounted electric control devices to wake up;

and responding to the fourth message, and waking up.

7. A software upgrading method of a vehicle-mounted electric control device is applied to the vehicle-mounted electric control device connected to a whole vehicle CAN bus, and is characterized in that the resistance values of a first terminal resistor and a second terminal resistor connected to the whole vehicle CAN bus are both smaller than 120 omega, and the method comprises the following steps:

receiving a first message sent by external upgrading equipment connected to a finished automobile CAN bus through an OBD interface at a first communication speed, wherein the first message comprises identification information of target vehicle-mounted electric control equipment to be upgraded at this time and indication information used for indicating other vehicle-mounted electric control equipment connected to the finished automobile CAN bus except the target vehicle-mounted electric control equipment to enter a dormant state;

under the condition that the target vehicle-mounted electric control equipment is determined to be the target vehicle-mounted electric control equipment according to the identification information, sending a response message to the upgrading equipment; entering a dormant state according to the indication information under the condition that the target vehicle-mounted electric control equipment is determined not to be the target vehicle-mounted electric control equipment according to the identification information;

if the response message is sent, receiving a second message sent by the upgrading device at the first communication rate, wherein the second message is used for indicating the target vehicle-mounted electric control device to switch the communication rate to a second communication rate, and the second communication rate is greater than the first communication rate;

8. The method of claim 7, further comprising:

if the response message is sent, receiving an upgrading request sent by the upgrading equipment at the first communication speed, wherein the upgrading request comprises secret key information;

verifying the key information in response to receiving the upgrade request;

9. The method of claim 7, further comprising:

10. The method of claim 7, further comprising:

11. The method of claim 7, further comprising:

if the vehicle-mounted electric control equipment enters the dormant state, receiving a fourth message sent by the upgrading equipment at the first communication rate, wherein the fourth message is used for indicating other vehicle-mounted electric control equipment except the target vehicle-mounted electric control equipment to wake up;

and responding to the fourth message, and waking up.

12. A software upgrading method of vehicle-mounted electric control equipment is applied to external upgrading equipment connected to a whole vehicle CAN bus through an OBD interface, and is characterized in that the resistance values of a first terminal resistor and a second terminal resistor connected to the whole vehicle CAN bus are both smaller than 120 omega, and the method comprises the following steps:

sending a first message at a first communication rate, wherein the first message comprises identification information of a target vehicle-mounted electric control device to be upgraded at this time and indication information for indicating other vehicle-mounted electric control devices connected to the whole vehicle CAN bus except the target vehicle-mounted electric control device to enter a dormant state;

in response to receiving a response message sent by the target vehicle-mounted electric control equipment, sending a second message to the target vehicle-mounted electric control equipment at the first communication rate, wherein the second message is used for indicating the target vehicle-mounted electric control equipment to switch the communication rate to a second communication rate, and the second communication rate is greater than the first communication rate;

and sending an upgrading program to the target vehicle-mounted electric control equipment at the second communication speed.

13. The method of claim 12, further comprising:

if the response message is not received, determining whether the response failure times exceed a first preset time;

if the response failure times are determined not to exceed the first preset times, the step of sending the first message at the first communication rate is executed again;

and if the response failure times are determined to exceed the first preset times, sending a fourth message at the first communication rate, wherein the fourth message is used for indicating other vehicle-mounted electric control equipment except the target vehicle-mounted electric control equipment to be awakened.

14. The method of claim 12, wherein prior to the step of sending a second message to the target onboard electronic control device at the first communication rate, the method further comprises:

in response to receiving a response message sent by the target vehicle-mounted electric control equipment, sending an upgrading request to the target vehicle-mounted electric control equipment at the first communication rate, wherein the upgrading request comprises secret key information, so that the target vehicle-mounted electric control equipment can verify the secret key information;

responding to the received verification success message sent by the target vehicle-mounted electric control equipment, and executing the step of sending a second message to the target vehicle-mounted electric control equipment at the first communication rate;

determining whether the verification failure times exceed a second preset time or not in response to receiving a verification failure message sent by the target vehicle-mounted electric control equipment;

if the verification failure times are determined not to exceed the second preset times, the step of sending an upgrading request to the target vehicle-mounted electric control equipment at the first communication speed is executed again;

and if the verification failure times are determined to exceed the second preset times, sending a fourth message at the first communication rate, wherein the fourth message is used for indicating other vehicle-mounted electric control equipment except the target vehicle-mounted electric control equipment to be awakened.

15. The method of claim 12, further comprising:

and in response to receiving an upgrade completion message sent by the target vehicle-mounted electric control equipment, sending a third message to the target vehicle-mounted electric control equipment at the second communication rate, wherein the third message is used for indicating the target vehicle-mounted electric control equipment to switch the communication rate to the first communication rate.

16. The method of claim 12, further comprising:

determining whether the upgrade failure times exceed a third preset time or not in response to receiving the upgrade failure message sent by the target vehicle-mounted electric control equipment;

if the upgrade failure times are determined not to exceed the third preset times, re-executing the step of sending the upgrade program to the target vehicle-mounted electric control equipment at the second communication rate;

and if the upgrade failure times exceed the third preset times, sending a third message to the target vehicle-mounted electric control equipment at the second communication rate, wherein the third message is used for indicating the target vehicle-mounted electric control equipment to switch the communication rate to the first communication rate.

17. The method according to claim 15 or 16, characterized in that the method further comprises:

and sending a fourth message at the first communication rate, wherein the fourth message is used for indicating other vehicle-mounted electric control equipment except the target vehicle-mounted electric control equipment to wake up.

18. A vehicle-mounted electric control device is connected to a CAN bus of a whole vehicle and controls the work of corresponding vehicle-mounted components, and is characterized by comprising:

a memory having a computer program stored thereon;

a processor for executing the computer program in the memory to carry out the steps of the method of any one of claims 7 to 11.

19. An upgrading device is used for being connected to a vehicle CAN bus through an OBD interface, and is characterized by comprising:

a memory having a computer program stored thereon;

a processor for executing the computer program in the memory to carry out the steps of the method of any one of claims 12 to 17.

20. A software upgrading system of a vehicle-mounted electric control device is characterized by comprising:

the entire vehicle CAN communication system of any one of claims 1 to 6; and the number of the first and second groups,

the upgrade device of claim 19, connected to the vehicle CAN bus via an OBD interface.

21. A vehicle, characterized by comprising: the entire vehicle CAN communication system of any one of claims 1 to 6.

22. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 7 to 11.

23. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 12 to 17.