CN113325831A

CN113325831A - Gateway routing method for platform-based automobile flash diagnosis

Info

Publication number: CN113325831A
Application number: CN202110702520.7A
Authority: CN
Inventors: 夏永强; 陈江波; 赵能卿; 李强; 吴皓源
Original assignee: Jiangling Motors Corp Ltd
Current assignee: Jiangling Motors Corp Ltd
Priority date: 2021-06-24
Filing date: 2021-06-24
Publication date: 2021-08-31
Anticipated expiration: 2041-06-24
Also published as: CN113325831B

Abstract

A gateway routing method for a platform automobile flash diagnosis is characterized in that 4 CAN network segments PCAN, BCAN, CCAN and TCAN of a whole automobile are connected to GW, and flash data is routed to a target network segment CCAN or TCAN for a controller to be flashed under the condition of non-PCAN and BCAN flash diagnosis; meanwhile, the flash ECU control unit responds to data and synchronously routes the data back to the original network segment PCAN or BCAN; the diagnostic equipment comprises an after-sales diagnostic instrument and offline EOL equipment; for the flash controller on the non-TCAN, the data is routed to the corresponding CAN network segment for flash, and the flash ECU control unit responds to the data and synchronously routes back to the TCAN; when the whole vehicle has two kinds of flash diagnosis at the same time, the flash diagnosis of the diagnosis equipment is insisted on being higher than the remote flash diagnosis principle, namely the flash diagnosis of the diagnosis equipment is directly switched to. The invention effectively solves the problem of route disorder diagnosis in vehicle end flash diagnosis, and can avoid the problem of flash failure caused by OTA flash diagnosis interference in the off-line EOL flash and after-sale diagnosis equipment flash process.

Description

Gateway routing method for platform-based automobile flash diagnosis

Technical Field

The invention relates to an automobile remote diagnosis technology, in particular to a gateway routing strategy compatible with remote OTA (over the air) flash and diagnostic equipment flash simultaneously.

Background

With the rapid development of automobile modernization, the automobile electronic technology is changing day by day, and with the advent of the OTA technology, the technical research of automobile remote diagnosis is increasing by one level, and remote diagnosis no longer stays in the functions of reading fault codes, clearing fault codes, reading basic information and the like. The advent of OTA technology provides a new source of power for after-market vehicle maintenance. The OTA technical principle is still a flash diagnosis technology developed based on the UDS principle, OTA remote flash is based on issuing a flash diagnosis instruction by a TBOX controller, because the physical ID addresses used by the TBOX autonomous refresh diagnosis and diagnosis device are the same, it may happen that diagnostic data ID with OTA remote refresh and diagnostic device refresh appears on the CAN bus, especially, a diagnosis route across network segments is needed for refresh in a multi-network-segment entire vehicle architecture, the generated diagnosis route is very disordered, a gateway supporting the diagnosis route cannot execute a correct refresh diagnosis message route, which directly causes a refresh diagnosis failure, and needs to repeatedly execute operations again, which affects the work efficiency of offline refresh and after-sales replacement refresh, and although there are other related inventions, the problem existing in both the after-sales diagnosis device and the remote diagnosis is solved, the importance of factory offline EOL refresh diagnosis is ignored. When the remote diagnosis is executed, the switching time from the remote diagnosis to the local diagnosis is too long, and the EOL beat of the off-line production of a factory is directly influenced. The on-time delivery of the production vehicle is seriously influenced, and in addition, the remote flash diagnosis cannot be completed in a short time, so that the remote diagnosis flash failure condition is directly caused. The switching time of 10s defined by other related inventions does not solve these problems currently encountered.

Therefore, there is a need for a gateway routing strategy and a method for solving the problem of compatibility between OTA (over the air) flash and diagnostic device flash, where the diagnostic flash includes two flash scenarios, namely production and after-sales, so as to effectively solve the diagnostic routing disorder caused by the OTA flash and the diagnostic device flash, and further avoid the problem of flash failure caused by routing diagnostic conflict during the flash process, and provide accurate diagnostic routing data for the vehicle-side flash of OTA technology (remote flash) and offline EOL flash.

The invention patent application CN201811397702.2 proposes a coordination method for collision of vehicle fault diagnosis, which includes local diagnosis and remote diagnosis, and when one of the diagnoses is executed, an instruction is sent to prohibit the execution of the other diagnosis. The invention has the advantages that: the conflict coordination method solves the conflict between the remote diagnosis and the traditional local diagnosis in some scenes, and ensures the normal coordination execution between the remote diagnosis and the local diagnosis; because the local diagnosis is generally used by professional detection personnel, the detection mode is important, and the communication module of the remote diagnosis is timely disconnected or closed in a mode of taking the local diagnosis as a main mode when the conflict occurs, so that the remote diagnosis is closed, and the conflict of the remote diagnosis on the local diagnosis is avoided.

Disclosure of Invention

The invention discloses a gateway routing method for a platform automobile flash diagnosis, and provides a platform flash diagnosis gateway routing strategy, which can ensure that off-line EOL flash and after-sale diagnosis equipment flash are successfully completed on the premise of not changing a framework and can also consider the existence of an OTA flash technology.

The invention effectively solves the problem of route disorder diagnosis in vehicle end flash diagnosis, and can avoid the problem of flash failure caused by OTA flash diagnosis interference in the off-line EOL flash and after-sale diagnosis equipment flash process.

The technical scheme adopted by the invention is as follows:

the whole vehicle is a network architecture with 4 network segments, each network segment is connected to GW, and PCAN, BCAN, CCAN and TCAN are respectively. The diagnosis equipment (diagnosis instrument, offline EOL equipment) only supports PCAN and BCAN flash diagnosis, the remote diagnosis controller needs to diagnose routing on a TCAN network segment for cross-network-segment flash diagnosis, namely, the flash data needs to be routed to a target network segment (CCAN or TCAN) under the condition that the controller to be flashed is not PCAN or BCAN, and in addition, response data of the flash ECU control unit is also a synchronous routing return original network segment (PCAN or BCAN). The specific routing logic is as follows for FIG. 1, while TBOX remote flush diagnostics only support TCAN flush diagnostics. For a non-TCAN flash controller, data needs to be routed to a corresponding CAN network segment for flash, meanwhile, response data of a flash ECU control unit is also routed back to TCAN synchronously, and when two flash diagnoses exist in the whole vehicle at the same time, a gateway insists that the flash diagnosis of the diagnostic equipment is higher than a remote flash diagnosis principle, defines a remote diagnosis flash message Timeout time parameter Timeout parameter, and defines a waiting time Timewait parameter for switching from a remote flash diagnosis mode to a diagnostic equipment flash diagnosis mode. The specific gateway routing strategy is as follows:

1. when the remote write-through diagnosis message is overtime (the write-through diagnosis instruction of the TBOX is not monitored within the Timeout), directly switching the diagnosis priority, wherein the specific strategy is as follows: (a) clearing the diagnosis priority judgment timer of the Timewait, and always keeping the diagnosis mode priority principle of the diagnosis equipment for routing; (b) and directly processing the first frame message to avoid the failure of the flash caused by the loss of the flash data route. The gateway will proceed on the principle of where to route the response according to where the request is.

2. The remote write-over diagnosis message is not overtime (Timeout), and the Timewait time is delayed to switch the diagnosis priority; (a) activating a diagnosis priority judgment timer of the Timewait; (b) directly ignoring the first frame message, and ignoring the diagnosis request within the Timewait time. And after the Timewait time, switching the diagnosis priority, and always keeping the diagnosis equipment to perform routing according to the flash diagnosis mode priority principle.

The invention has the beneficial effects that:

1. the gateway routing method for the vehicle flash diagnosis of the platform integrates OTA flash diagnosis and diagnosis equipment flash diagnosis platform integration into vehicle diagnosis technology application, and better serves for after-sale quality problem diagnosis.

2. The gateway routing method for the vehicle flash diagnosis, which is disclosed by the invention, effectively solves the diagnosis routing disorder caused by the fact that OTA flash and diagnosis equipment flash occur simultaneously, further can avoid the problem of flash failure caused by routing diagnosis conflict in the flash process, and provides accurate diagnosis routing data for the vehicle flash of the OTA technology (TBOX remote flash).

3. The gateway routing method for the vehicle flash diagnosis, which is disclosed by the invention, avoids the problem that the off-line flash of the factory vehicle is interfered due to the occurrence of OTA flash when the diagnosis equipment (Tester/VCATS) is in flash. Accurate and complete routing data is provided for offline flashing. And the smooth operation of offline flashing diagnosis in a factory is ensured. So that the high quality delivery of the product is powerfully guaranteed.

The diagnosis priority judgment timer for clearing the Timewait can ensure that when the remote flash diagnosis occurs, the routing method is always in the local diagnosis and does not jump to the remote flash (OTA flash) diagnosis route, and the complete flash data can be routed to the target network segment for flash operation according to the routing strategy.

Drawings

FIG. 1 is a flash routing logic of a diagnostic device;

FIG. 2 is an OTA flush routing logic;

FIG. 3 is a flash routing flow diagram of mode 1;

fig. 4 is a flash routing flow diagram of mode 2.

Detailed Description

In order to make the technical idea and advantages of the invention for realizing the purpose of the invention more clear, the technical solution of the invention is further described in detail with reference to the accompanying drawings. It is to be understood that the following description is only intended to illustrate and describe the present invention and should not be construed as limiting the scope of the invention as claimed.

Example 1

Referring to fig. 1 and fig. 2, in the gateway routing method for the platformized automobile flash diagnosis of the present invention, 4 CAN segments PCAN, BCAN, CCAN, and TCAN of the entire automobile are connected to GW, and since the diagnosis device only supports PCAN and BCAN flash diagnosis, the diagnosis device includes an after-sales diagnostic device and an offline EOL device, the flash data is routed to the target segment CCAN or TCAN under the condition of non-PCAN and BCAN flash diagnosis for the controller to be flashed; meanwhile, the flash ECU control unit responds to data and synchronously routes the data back to the original network segment PCAN or BCAN; the specific routing logic relationship is as shown in FIG. 1; the remote flash diagnosis instruction is sent by a TBOX module on the TCAN, and the TBOX remote flash diagnosis only supports TCAN flash diagnosis, so that for a flash controller on non-TCAN, data is routed to a corresponding CAN network segment for flash, and meanwhile, a flash ECU control unit responds to data synchronization routing and returns TCAN; the OTA flash routing logic relationship is shown in FIG. 2; and when two kinds of flash diagnosis exist in the whole vehicle at the same time, the flash diagnosis of the diagnosis equipment is higher than the remote flash diagnosis principle, and the waiting time Timewait parameter for switching from the remote flash diagnosis mode to the diagnosis equipment flash diagnosis mode is defined to be 500 ms.

The diagnostic message ID range is $ 700- $7 FF. The gateway refreshes the time parameter when the BCAN and the PCAN receive the diagnosis message, monitors the BCAN and the PCAN diagnosis message, judges the connection and disconnection of the diagnosis equipment and sends the diagnosis equipment to the bus in a message form. And simultaneously, the GW synchronously monitors whether the TCAN has a diagnosis message. And defining the Timeout parameter Timeout parameter of the remote flash diagnosis message as 5 s.

When the GW monitors the BCAN or the PCAN and sends a 3E 00 instruction to the diagnostic equipment, the diagnostic equipment is judged to be online and is sent to the network segment TCAN in a broadcast mode in a diagnostic equipment message mode (0 x 501), and the message period is 200 ms. Sending a 0x0 state by a frequently-sent message GW _0x501 on a TCAN, wherein 0x0 indicates that a diagnostic device is online, 0x1 indicates that the diagnostic device is not online, and after the diagnostic device is online, sending a 0x0 state by the frequently-sent message GW _0x501 on the TCAN, wherein the message definition is shown in Table 1:

table 1 message definitions

CANID

Byte0

Byte1

Byte2

Byte3

Byte4

Byte5

Byte6

Byte7

0x501

Status bit

Reservation

Example 2

The difference between the gateway routing method for the platform automobile flash diagnosis in the embodiment and the embodiment 1 is that: further, (1) the gateway monitors that the refresh diagnosis instruction sent by the TBOX on the TCAN segment is overtime (the refresh diagnosis instruction of the TBOX is not monitored within 5 s), and performs the refresh diagnosis routing by using the routing policy mode 1, where the specific policy is: (a) clearing the diagnosis priority judgment timer of 500ms, and always keeping the diagnosis equipment to write the diagnosis priority principle for routing; (b) and the first frame message is directly routed and processed, so that the failure of the flash caused by the loss of the flash data routing is avoided. The gateway will proceed on the principle of where to route the response according to where the request is. FIG. 3 is a flow diagram of the flash routing of mode 1.

The diagnosis priority judgment timer of 500ms is cleared to ensure that when OTA remote flash diagnosis occurs, the route method is always in local diagnosis and does not jump to a remote flash (OTA flash) diagnosis route, and complete flash data can be routed to a target network segment for flash operation according to the route strategy. When the diagnostic device is connected to the bus, the gateway sends the online state of the diagnostic device to the TCAN network segment, and the TBOX monitors that the diagnostic device is online and does not allow the TBOX to send a flash diagnostic instruction.

(2) When an over-the-air (OTA) write diagnosis instruction sent by TBOX on TCAN is monitored, a route strategy mode 2 is adopted to carry out write diagnosis routing, and the specific strategy is (a) to activate a diagnosis priority judgment timer of Timewait; (b) directly ignoring the first frame message, and ignoring the diagnosis request within the Timewait time. FIG. 4 is a flow diagram of the flush routing of mode 2.

After the diagnosis priority of the Timewait is activated, if the diagnosis equipment is connected to the bus at the moment, the gateway continues to complete the routing function of the response message of the last time that the gateway or other ECUs do not respond to the TBox diagnosis request within 500ms of delay switching; meanwhile, the gateway can not route the diagnosis request and the diagnosis message routing function sent by the diagnosis equipment in the delayed switching of 500ms, and the gateway directly ignores the diagnosis message sent by the diagnosis equipment and does not route the diagnosis message.

And when the delay switching timer counts for 500ms, directly switching to the gateway routing strategy of the mode 1, and executing the flash instruction of the diagnostic equipment and the flash routing logic of the diagnostic equipment. The gateway will proceed on the principle of where to route the response according to where the request is.

Example scenario 1 for the application of the invention

1. After the final assembly of the vehicle is completed, at an eol (end of line) terminal, the module needs to be refreshed and the software needs to be updated. Performing OTA remote flush before connecting the diagnostic instrument to start the flush will convert the routing mode of the gateway from OTA flush diagnostic routing mode 1 to diagnostic device flush routing mode 2. After connecting the diagnostic instrument, the TBOX monitors that the diagnostic device is on-line and OTA remote flush will be disabled, performing only local flush diagnostics, i.e., the gateway performs flush routing mode 2.

Example scenario 2 for the application of the invention

When the whole vehicle is in a 4S shop after sale, a TBOX (OTA remote write) write diagnosis and diagnosis equipment write diagnosis simultaneous diagnosis scene exists, the TBOX write diagnosis starts to be executed before the diagnosis instrument is connected, and the routing mode of the gateway is converted from an OTA write diagnosis routing mode 1 to a diagnosis equipment write routing mode 2. After the diagnostic meter is connected, TBOX monitors that the diagnostic device is on-line and TBOX flush diagnostics will be disabled, only local flush diagnostics will be performed.

Example scenario 3 for the application of the invention

When the whole vehicle is sold and in the hands of consumers, only the application scene of TBOX flash diagnosis exists, and the requirement that GW responds to the conflict of two-way flash diagnosis does not need to be considered.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be construed as limiting the invention. Other modifications of the invention will occur to those skilled in the art without the benefit of this disclosure and it is intended to cover within the scope of the invention any modifications that fall within the spirit and scope of the invention or the equivalents thereof which may be substituted by one of ordinary skill in the art without departing from the scope of the invention.

Claims

1. A gateway routing method for a platform automobile flash diagnosis is characterized in that 4 CAN network segments PCAN, BCAN, CCAN and TCAN of a whole automobile are connected to GW, and the method comprises the following steps:

1) because the diagnosis equipment only supports PCAN and BCAN flash diagnosis, the flash data is routed to the target network segment CCAN or TCAN for the controller to be flashed under the condition of non-PCAN and BCAN flash diagnosis; meanwhile, the flash ECU control unit responds to data and synchronously routes the data back to the original network segment PCAN or BCAN; the diagnostic equipment comprises an after-sales diagnostic instrument and offline EOL equipment;

2) because the remote flash diagnosis only supports TCAN flash diagnosis, for a flash controller on non-TCAN, the data is routed to a corresponding CAN network segment for flash, and simultaneously, the flash ECU control unit responds to the data and synchronously routes back to TCAN;

3) when two kinds of flash diagnosis exist in the whole vehicle at the same time, the flash diagnosis of the diagnosis equipment is insisted on being higher than the remote flash diagnosis principle, namely, the flash diagnosis of the diagnosis equipment is directly switched to, and a waiting time Timewait parameter for switching from the remote flash diagnosis mode to the diagnosis equipment flash diagnosis mode is defined.

2. The gateway routing method for the instrumented automotive flash diagnostics of claim 1, wherein: the ID range of the diagnosis message is $ 700- $7 FF; the gateway GW refreshes the time parameter when receiving the diagnosis message at the BCAN and the PCAN, monitors the BCAN and the PCAN diagnosis message, judges the connection and disconnection of the diagnosis equipment and sends the diagnosis equipment to the bus in a message form; meanwhile, the gateway synchronously monitors whether a diagnosis message exists on the TCAN; a diagnostic device Timeout parameter Timeout is defined beyond which no diagnostic device connection is monitored.

3. The gateway routing method for the instrumented automobile flash diagnostics of claim 1 or 2, wherein: the gateway monitors that a refresh diagnosis instruction sent by a TBOX on a TCAN network segment is overtime, and performs refresh diagnosis routing by adopting a routing strategy mode 1, wherein the specific strategy of the strategy mode 1 is as follows:

(a) clearing the diagnosis priority judgment timer of the Timewait, and always keeping the local diagnosis priority principle for routing;

(b) directly processing the first frame message to avoid the failure of the flash caused by the loss of the flash data route; the gateway will proceed on the principle of where to route the response according to where the request is.

4. The gateway routing method for the flattened automotive flash diagnostics of claim 3, wherein: the diagnosis priority judgment timer for clearing the Timewait is used for ensuring that when OTA flash diagnosis occurs, the OTA flash diagnosis is always in a local diagnosis routing method and does not jump to a remote flash diagnosis routing, and complete flash data can be routed to a target network segment for flash operation according to the routing strategy.

5. The gateway routing method for the flattened automotive flash diagnostics of claim 3, wherein: when the GW monitors a write-over diagnosis instruction sent by the TBOX on the TCAN, and performs write-over diagnosis routing by using a routing policy mode 2, the policy mode 2 specifically policy is:

(a) activating a diagnosis priority judgment timer of the Timewait;

(b) directly ignoring the first frame message, and ignoring the diagnosis request within the Timewait time; after the diagnosis priority of the Timewait is activated, if the diagnosis equipment is connected to the bus at the moment, the gateway continues to finish the routing function of the response message of the last time that the gateway or other ECUs do not respond to the remote write-over diagnosis request within the Timewait time; meanwhile, the gateway GW does not route the diagnosis request and the diagnosis message routing function sent by the diagnosis equipment within the Timewait time, and directly ignores the diagnosis message sent by the diagnosis equipment;

after the Timewait time, directly switching to the GW routing strategy of the mode 1, and executing the flash instruction of the diagnosis equipment and the flash routing logic of the diagnosis equipment.