CN114879633A - Diagnostic instrument, fault diagnosis method of electronic control system and readable storage medium - Google Patents

Abstract

The present invention provides a diagnostic instrument, a fault diagnosis method for an electronic control system, and a readable storage medium. Through inter-core communication between a first type of processor and a second type of processor, The diagnosis command for fault diagnosis by the second-class processor is sent to the second-class processor, and the diagnostic content fed back by the second-class processor in response to the diagnosis command is returned to the diagnostic instrument, so that only access to the electronic control system is allowed. The diagnostic instrument of the first type of processor can also perform fault diagnosis on the second type of processor. Compared with the existing diagnostic instrument, the present invention can substantially enable the diagnostic instrument to realize the function of diagnosing any type of processor among the multi-type processors only by upgrading the software, which reduces the need for adding a diagnostic interface in the diagnostic instrument and connecting the diagnostic instrument and the diagnostic instrument. The cost of the wiring harness for the second-class processor, while avoiding the security risks introduced by the addition of diagnostic interfaces.

Description

Diagnostic instrument, fault diagnosis method of electronic control system and readable storage medium

technical field

The invention relates to the technical field of fault diagnosis, in particular to a diagnostic instrument, a fault diagnosis method for an electronic control system and a readable storage medium.

Background technique

With the development of information technology and the improvement of demand, automotive products are gradually becoming intelligent and networked. The traditional automotive electronic control unit (ECU) system based on a single processor can no longer meet the needs of automotive development. Therefore, the technology of heterogeneous multiple processors to form a new automotive electronic control system emerges as the times require. New automotive electronic control systems being built today typically consist of multiple processors with different architectures, performances, and uses. Different buses such as SPI, UART, Ethernet, CAN, LIN, and USB are generally used for inter-core communication between each processor to jointly complete the ECU function of the entire car.

The processors in the existing automotive electronic control systems are usually divided into two categories. Controller Unit), another type is a processor (which can be called a non-real-time core, and can be denoted as MPU, MicroProcessor Unit) used in a non-real-time operating system (such as Linux, etc.).

Each processor in the above-mentioned automotive electronic control system may be abnormal, but the current existing diagnostic instruments generally only have CAN UDS diagnostic ports, which only allow access to real-time core MCU, not USB, Ethernet, etc. commonly used in real-time operating systems. Due to other reasons such as safety or cost, the wiring harness has not yet entered the standard diagnostic equipment or wiring harness of the OEM or 4S shop. Therefore, in the event of a non-real-time core MPU abnormality, the after-sales or 4S shop processing operations are limited to replugging the power supply, Replacement of new parts can not achieve the purpose of fault diagnosis record of non-real-time core MPU.

The above problems also exist in other existing fault diagnosis technologies for electronic control systems with real-time processors and non-real-time processors.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a diagnostic instrument, a fault diagnosis method for an electronic control system, and a readable storage medium, so that a diagnostic instrument that only allows access to the first type of processor in the electronic control system can also access the electronic control system. The second type of processor performs fault diagnosis.

To achieve the above object, the present invention provides a fault diagnosis for an electronic control system having a first type of processor and a second type of processor, wherein the first type of processor and the second type of processor pass through the core. Communication connection between the communication bus, the diagnostic instrument includes:

a diagnosis module, configured to generate a first preset diagnosis command for diagnosing the second type of processor;

a diagnostic interface for communicating with the first type of processor, sending the first preset diagnostic command to the first type of processor, and receiving the second type of processor through the first type of processor The first diagnostic content generated by the class processor in response to the first preset command.

Optionally, the diagnostic module is further configured to generate a second preset diagnostic command for diagnosing the first type of processor; the diagnostic interface is further configured to send the second preset diagnostic command to the A first type of processor, and receiving second diagnostic content generated by the first type of processor in response to the second preset diagnostic command.

Optionally, the diagnostic instrument further includes a storage and display module for storing and displaying the first diagnostic content and the second diagnostic content.

Optionally, the first type of processor is a processor for a real-time operating system, the second processor is a processor for a non-real-time operating system, and the first type of processor and the second Class II processors are integrated in the same SoC.

Optionally, the diagnostic interface is connected to the first-type processor through a CAN communication harness; the first-type processor and the second-type processor use SPI, UART, Ethernet, CAN, LIN or USB cores. Communication connection between the communication bus.

Based on the same inventive concept, the present invention also provides a fault diagnosis method for an electronic control system, the electronic control system includes a first-type processor and a second-type processor that are communicatively connected through an inter-core communication bus, and the fault diagnosis method include:

the first type of processor externally receives a first preset diagnostic command for diagnosing a fault of the second type of processor;

The first type of processor identifies the first preset diagnostic command and forwards the identified first preset diagnostic command to the second type of processor through the inter-core communication bus;

The second type of processor responds to the first preset diagnosis command and generates corresponding first diagnosis content, and feeds back the first diagnosis content to the first type of processor through the inter-core communication bus;

The first type of processor feeds back the received first diagnostic content to the outside.

Optionally, the fault diagnosis method for the electronic control system further includes:

The first type of processor receives a second preset diagnostic command from the outside for diagnosing the first type of processor failure;

The first type of processor responds to the second preset diagnostic command and generates corresponding second diagnostic content;

The first type of processor feeds back the second diagnostic content to the outside.

Optionally, the first type of processor is communicatively connected to a diagnostic interface of an external diagnostic instrument, so that the first type of processor receives the first preset diagnostic command and the a second preset diagnostic command;

The fault diagnosis method for the electronic control system further includes: the diagnostic instrument receives, stores and displays the first diagnostic content and the second diagnostic content fed back by the first type of processor.

Optionally, the first type of processor is communicatively connected to the external diagnostic instrument through a CAN communication harness, and the first preset diagnostic command and the second preset diagnostic command are both CAN UDS diagnostic commands;

The fault diagnosis method of the electronic control system further includes: the first type processor feeds back both the first diagnosis content and the second diagnosis content to the diagnostic instrument in the form of CAN UDS instructions.

Based on the same inventive concept, the present invention also provides a readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the fault diagnosis method of the electronic control system of the present invention is implemented.

Compared with the prior art, the technical solution of the present invention has at least one of the following beneficial effects:

1. Through the inter-core communication between the first type of processor and the second type of processor, the diagnostic command generated by the diagnostic instrument for diagnosing the fault of the second type of processor can be sent to the second type of processor, and The diagnostic content fed back by the second-type processor in response to the diagnostic command is returned to the diagnostic instrument, so that the diagnostic instrument that is only allowed to access the first-type processor in the electronic control system can also troubleshoot the second-type processor diagnosis.

2. Compared with the existing diagnostic instrument, the present invention can substantially enable the diagnostic instrument to realize the function of diagnosing any type of processor among the multi-type processors only by upgrading the software, which reduces the need for adding a diagnostic interface and connecting a diagnostic instrument in the diagnostic instrument. The cost of the wiring harness of the instrument and the second type of processor is avoided, and the security risk introduced by the new diagnostic interface is avoided.

3. When the first type of processor is a processor of a real-time operating system, and the second type of processor is a processor of a non-real-time operating system, the solution of the present invention can solve the current non-real-time system processor. The problem.

Description of drawings

FIG. 1 is a schematic diagram of the connection between a diagnostic instrument and an electrical control system according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of transmission of commands and diagnostic content in a fault diagnosis method for an electronic control system according to an embodiment of the present invention.

Detailed ways

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without one or more of these details. In other instances, some technical features known in the art have not been described in order to avoid obscuring the present invention. It should be understood that the present invention may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. The same reference numbers refer to the same elements throughout. It will be understood that when an element is referred to as being "connected" or "coupled" to other elements, it can be directly connected to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly connected" to other elements, there are no intervening elements present. As used herein, the singular forms "a," "an," and "the/the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term "comprising" is used to identify the presence of possible features, steps, operations, elements and/or components, but does not exclude the presence or Add to. As used herein, the term "and/or" includes any and all combinations of the associated listed items.

The technical solutions proposed by the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description. It should be noted that, the accompanying drawings are all in a very simplified form and in inaccurate scales, and are only used to facilitate and clearly assist the purpose of explaining the embodiments of the present invention.

1 and FIG. 2, an embodiment of the present invention provides a diagnostic instrument 20, the diagnostic instrument 20 has a diagnostic module 201 and a diagnostic interface 202, which can be used for a first-type processor 101 and a second-type processor 101. The electronic control system 10 of the processor 102 performs fault diagnosis.

The diagnostic instrument 20 is only allowed to access the first-type processor 101 of the electronic control system 10 , that is, in the electronic control system 10 , the first-type processor 101 is connected to the diagnostic interface 202 of the diagnostic instrument 20 . It can communicate with the diagnostic interface 202 of the diagnostic instrument 20 through a CAN communication harness, etc. The second type processor 102 does not have the ability to connect with the diagnostic interface 202 of the diagnostic instrument 20, and it cannot communicate with the diagnostic interface 202 of the diagnostic instrument 20 through the CAN communication harness or the like. The diagnostic interface 202 of the diagnostic instrument 20 is communicatively connected. However, the first type processor 101 and the second type processor 102 may be communicatively connected through any suitable inter-core communication bus such as SPI, UART, Ethernet, CAN, LIN or USB.

Referring to FIG. 2 , in this embodiment, the first type of processor 101 can receive and identify the first preset diagnostic command (ie the CAN UDS command) issued by the diagnostic instrument 20 for diagnosing the fault of the second type of processor 102 1) and a second preset diagnostic command (ie CAN UDS command 2) for diagnosing the first type of processor 101, and the first preset diagnostic command (ie CAN UDS command 1) can be converted into a The command forms allowed and recognized by the second type processor 102, and the second diagnosis content generated by the first type processor 101 itself in response to the second preset diagnosis command and the second type processor 102 responding to the first preset diagnosis The first diagnostic content generated by the command is converted into the diagnostic content allowed and recognized by the diagnostic instrument (eg CAN UDS command).

Optionally, the first type of processor 101 is a processor for a real-time operating system, the second processor 102 is a processor for a non-real-time operating system, and the first type of processor 101 and the second type of processor 102 It can be further integrated in the same System on Chip (SoC).

As an example, the electronic control system is an electronic control system of an automobile, the first type of processor 101 is a microcontroller (Mirco Controller Unit, MCU), and the second type of processor 102 is a microprocessor (Micro Processor Unit, MPU) ), MPU and MCU can meet different application scenarios. MPU focuses on executing complex and diverse large-scale programs through powerful computing and processing capabilities, and usually has external large-capacity memory (such as high-performance RAM and DDR); MCU runs a relatively single task, executes The management and control functions of hardware devices do not require strong computing and processing capabilities. Compared with MPU, MCU has higher-speed real-time control capabilities and communication diversity.

Please continue to refer to FIG. 1 and FIG. 2 , in the diagnostic apparatus of this embodiment, the diagnostic module 201 is used to generate a first preset diagnostic command (ie, CAN UDS command 1) for diagnosing the fault of the second-type processor 102, and, A second preset command (ie, CAN UDS command 2) for diagnosing the first type of processor 101 is generated. The diagnostic interface 202 is communicatively connected to the first-type processor 101 through the CAN communication harness (that is, the diagnostic interface 202 is connected to the first-type processor 101 ), and is used to send CAN UDS command 1 and CAN UDS command 2 to the first-type processor 101 , and receive the second diagnostic content generated by the first type processor 101 in response to the second preset command, and receive the first type of diagnostic content generated by the second type processor 102 in response to the first preset command through the first type processor 101 Diagnose content.

Optionally, the diagnostic instrument 20 further includes a storage and display module (not shown) for storing and displaying the first diagnostic content and the second diagnostic content.

It can be understood that, the diagnostic module 201, the diagnostic interface 202 and the storage display module in the diagnostic instrument 20 may be combined into one functional module, or any one of the modules may be split into multiple functional modules, or, these modules At least part of the functions of one or more of the modules may be combined with at least part of the functions of other modules and implemented in one functional module. According to an embodiment of the present invention, at least one of the diagnostic module 201, the diagnostic interface 202, and the storage display module in the diagnostic instrument 20 may be at least partially implemented as a hardware circuit, such as a field programmable gate array (FPGA), a programmable logic Array (PLA), system-on-chip, system-on-substrate, system-on-package, application-specific integrated circuit (ASIC), or any other reasonable way of integrating or packaging circuits, implemented in hardware or firmware, or in software , hardware, and firmware by an appropriate combination of three implementations. Alternatively, at least one of the diagnostic module 201, the diagnostic interface 202 and the storage display module in the diagnostic instrument 20 may be implemented at least in part as a computer program module, and when the program is run by a computer, it can execute the functions of the corresponding modules, and can Perform a software upgrade.

Please continue to refer to FIG. 1 and FIG. 2 , an embodiment of the present invention further provides a fault diagnosis method for an electronic control system 10 , wherein the electronic control system 10 may include a first-type processor 101 communicatively connected through an inter-core communication bus and the second-type processor 10, the fault diagnosis method can be implemented with the cooperation of the diagnostic instrument 20, and the diagnostic instrument 20 is only allowed to access the first-type processor 101 of the electronic control system, that is, the first-type processor 101 It is connected for communication with the diagnosis interface 202 of the external diagnosis instrument 20 .

The fault diagnosis method of the electronic control system 10 in this embodiment can be divided into the following two parts:

(1) The fault diagnosis of the second type processor 102 includes the following steps:

S11, the diagnostic module 201 of the diagnostic instrument 20 generates a first preset diagnostic command for diagnosing the fault of the second-type processor 102, denoted as CAN UDS command 1;

S12, the first type of processor 101 receives the first preset diagnostic command CAN UDS command 1 from the diagnostic interface 202, and further identifies and processes the first preset diagnostic command (ie CAN UDS command 1) to convert it into A diagnostic command that can be recognized by the second type of processor 102 (to denote a communication link, it is still labeled CAN UDS command 1 in FIG. 2);

S13, the first type processor 101 sends the converted diagnostic command to the second type processor 102 through any suitable inter-core communication bus such as SPI, UART, Ethernet, CAN, LIN or USB;

S14, the second-type processor 102 responds to the diagnostic command and generates the first diagnostic content (including fault information such as the fault code and status value of the second-type processor 102), and the second-type processor 102 further passes the inter-core communication bus The first diagnostic content is fed back to the first type processor 101, wherein the second type processor 102 can send fault information such as fault codes and status values and fault processing status information according to a specific format file (such as XML, JSON, etc.). After recording, the first diagnostic content is formed;

S15, the first type processor 101 converts the received first diagnostic content into a form allowed by the diagnostic instrument (eg CAN USD instruction), and feeds it back to the diagnostic instrument 20 through the diagnostic interface 202;

S16, the diagnostic instrument 20 saves and displays the acquired first diagnostic content to the product after-sales personnel.

(2) The fault diagnosis of the first type processor 101 includes the following steps:

S21, the diagnostic module 201 of the diagnostic instrument 20 generates a second preset diagnostic command for diagnosing the failure of the first-type processor 101, denoted as CAN UDS command 2;

S22, the first type processor 101 responds to the CAN UDS command 2 and generates corresponding second diagnostic content (including fault information such as the fault code and status value of the first type processor 101), wherein the first type processor 101 can press A specific format file (such as XML, JSON, etc.) records fault information such as fault codes and status values, and fault processing status information, etc., to form the second diagnostic content;

S23, the first type processor 101 converts the second diagnostic content into a form allowed by the diagnostic instrument (eg CAN USD command), and feeds it back to the diagnostic instrument 20 through the diagnostic interface 202;

S24, the diagnostic instrument 20 saves and displays the acquired second diagnostic content to the product after-sales personnel.

It should be noted that, the fault diagnosis of the first-type processor 101 and the second-type processor 102 by the above-mentioned diagnostic instrument 20 may be performed synchronously or in a time-sharing manner, which depends on the settings in the diagnostic instrument 20 . In addition, in other embodiments of the present invention, the first type processor 101 can upload diagnostic content such as fault codes and status values of the entire electronic control system including itself and the second type processor 102 to the diagnostic instrument 20 at one time , so as to achieve the purpose of a diagnosis. Of course, in other embodiments of the present invention, if conditions permit, the first type processor 101 is also allowed to upload the second diagnostic content generated by itself and the second type of processor 102 to the diagnostic instrument 20 in batches the first diagnostic content.

Based on the same inventive concept, an embodiment of the present invention further provides a readable storage medium on which a computer program is stored. The computer program may include code/computer-executable instructions. When the computer program is executed by a processor, The fault diagnosis method of the electronic control system of the present invention and any modification thereof are realized. The readable storage medium can be any medium that can contain, store, communicate, propagate, or transmit instructions. For example, the computer storage medium may include, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, device, or propagation medium. Specific examples of the readable storage medium include: magnetic storage devices such as magnetic tapes or hard disks (HDDs); optical storage devices such as compact disks (CD-ROMs); memories such as random access memory (RAM) or flash memory; and/ or wired/wireless communication links.

To sum up, the technical solution of the present invention, in view of the situation that the traditional diagnostic instrument only has CAN wiring harness and can only diagnose the processor of the real-time operating system, but cannot diagnose the multi-processor, the first type of processor can be used. Inter-core communication with the second-type processor, sending a diagnostic command generated by the diagnostic instrument for diagnosing the second-type processor to the second-type processor, and sending the second-type processor to respond to the diagnosis The diagnostic content fed back by the command is returned to the diagnostic instrument, so that the diagnostic instrument that is only allowed to access the first-type processor in the electronic control system can also perform fault diagnosis on the second-type processor. Compared with the existing diagnostic instrument, the present invention can substantially make the diagnostic instrument realize the function of diagnosing any type of processor among the multi-type processors only by upgrading the software, which reduces the need for adding a diagnostic interface and connecting the diagnostic instrument and the diagnostic instrument. The cost of the wiring harness of the second type of processor, at the same time, avoids the security risk introduced by the newly added diagnostic interface, and solves the problem that the current non-real-time operating system processor cannot handle after-sales diagnosis and processing.

The above description is only a description of the preferred embodiments of the present invention, and does not limit the scope of the present invention. Any changes and modifications made by those of ordinary skill in the field of the present invention according to the above disclosure belong to the scope of the technical solutions of the present invention.

Claims (10)

1. A diagnostic instrument, characterized in that, it is used for fault diagnosis of an electronic control system having a first-type processor and a second-type processor, and the first-type processor and the second-type processor pass through Inter-core communication bus communication connection, the diagnostic instrument includes: a diagnosis module, configured to generate a first preset diagnosis command for diagnosing the second type of processor; a diagnostic interface for communicating with the first type of processor, sending the first preset diagnostic command to the first type of processor, and receiving the second type of processor through the first type of processor The first diagnostic content generated by the class processor in response to the first preset command. 2. The diagnostic apparatus according to claim 1, wherein the diagnostic module is further configured to generate a second preset diagnostic command for diagnosing the first type of processor; the diagnostic interface is further configured to Sending the second preset diagnostic command to the first type of processor, and receiving second diagnostic content generated by the first type of processor in response to the second preset diagnostic command. 3 . The diagnostic apparatus according to claim 2 , further comprising a storage and display module for storing and displaying the first diagnostic content and the second diagnostic content. 4 . 4. The diagnostic apparatus of claim 1, wherein the first type of processor is a processor for a real-time operating system, and the second processor is a processor for a non-real-time operating system, And the first type of processor and the second type of processor are integrated in the same system-on-a-chip. 5 . The diagnostic apparatus according to claim 1 , wherein the diagnostic interface is connected to the first-type processor through a CAN communication harness; the first-type processor and the second-type processor pass through the SPI, UART, Ethernet, CAN, LIN or USB inter-core communication bus communication connections. 6. A fault diagnosis method for an electronic control system, wherein the electronic control system comprises a first-type processor and a second-type processor that are communicatively connected through an inter-core communication bus, and the fault diagnosis method comprises: the first type of processor externally receives a first preset diagnostic command for diagnosing a fault of the second type of processor; The first type of processor identifies the first preset diagnostic command and forwards the identified first preset diagnostic command to the second type of processor through the inter-core communication bus; The second type of processor responds to the first preset diagnosis command and generates corresponding first diagnosis content, and feeds back the first diagnosis content to the first type of processor through the inter-core communication bus; The first type of processor feeds back the received first diagnostic content to the outside. 7. The fault diagnosis method of an electronic control system according to claim 6, characterized in that, further comprising: The first type of processor receives a second preset diagnostic command from the outside for diagnosing the first type of processor failure; The first type of processor responds to the second preset diagnostic command and generates corresponding second diagnostic content; The first type of processor feeds back the second diagnostic content to the outside. 8 . The fault diagnosis method of an electronic control system according to claim 7 , wherein the first type of processor is communicatively connected to a diagnostic interface of an external diagnostic instrument, so that the first type of processor is communicatively connected from 8 . receiving the first preset diagnostic command and the second preset diagnostic command at the diagnostic instrument; The fault diagnosis method for the electronic control system further includes: the diagnostic instrument receives, stores and displays the first diagnostic content and the second diagnostic content fed back by the first type of processor. 9 . The fault diagnosis method of an electronic control system according to claim 8 , wherein the first type of processor is communicatively connected to the external diagnostic instrument through a CAN communication harness, and the first preset diagnostic command and the second preset diagnostic command are both CAN UDS diagnostic commands; The fault diagnosis method of the electronic control system further includes: the first type processor feeds back both the first diagnosis content and the second diagnosis content to the diagnostic instrument in the form of CAN UDS instructions. 10. A readable storage medium on which a computer program is stored, characterized in that, when the computer program is executed by a processor, the fault diagnosis of the electronic control system according to any one of claims 6-9 is realized method.

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