CN110281865B - Vehicle controller and data storage method - Google Patents

Vehicle controller and data storage method Download PDF

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Publication number
CN110281865B
CN110281865B CN201910582595.9A CN201910582595A CN110281865B CN 110281865 B CN110281865 B CN 110281865B CN 201910582595 A CN201910582595 A CN 201910582595A CN 110281865 B CN110281865 B CN 110281865B
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storage
data
trigger
request
stored
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CN110281865A (en
Inventor
张鲁兵
刘中秀
孙晓鹏
王震华
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Weichai Power Co Ltd
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Weichai Power Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/023Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
    • B60R16/0231Circuits relating to the driving or the functioning of the vehicle

Abstract

The embodiment of the application discloses a vehicle controller and a data storage method, the storage addresses of the first storage element and the storage addresses of the second storage element of the vehicle controller have a mapping relation, when updating the content in the first storage element, only judging whether the content stored in each storage address of the read first storage element and the second storage element meets the first condition, a trigger store request may be generated if the first condition is satisfied, and in response to the trigger store request, based on the contents stored in the respective memory addresses of the second memory element, the content stored in each memory address of the first memory element is updated without generating each trigger request trigger memory request by each functional module independently, therefore, the condition that the sum of the storage requests triggered by the trigger requests sent by all the functional modules exceeds the maximum flash frequency of the storage module is avoided.

Description

Vehicle controller and data storage method
Technical Field
The application relates to the technical field of automobiles, in particular to a vehicle controller and a data storage method.
Background
The triggered storage is storage triggered when an electrical switch on a vehicle controller is closed, and the triggered storage can solve the problem that data cannot be stored due to abnormal power failure, so that in order to prevent the problem that data cannot be stored due to direct power failure in the vehicle controller at present, a triggered storage mode is generally used for an EE signal (the EE signal refers to a signal stored in a charged Erasable Programmable Read-Only Memory (such as an EEPROM), which is a storage chip with data not lost after power failure). When the vehicle controller works specifically, a plurality of signals needing trigger type storage exist in a storage module of the vehicle controller, each signal needing trigger type storage has an independent trigger condition, and no matter which signal has a trigger storage request, a trigger storage module in the vehicle controller can immediately respond to the trigger storage request and trigger the storage of the signals stored in the storage module for one time.
However, in the data storage method of the existing vehicle controller, in the practical application process, the number of times of triggering and storing the storage module easily exceeds the maximum number of times of writing in the storage module.
Disclosure of Invention
In order to solve the technical problem, embodiments of the present application provide a vehicle controller and a data storage method, so as to prevent the number of times that the vehicle controller triggers and stores the storage module of the vehicle controller from exceeding the maximum number of times of flash of the storage module.
In order to solve the above problem, the embodiment of the present application provides the following technical solutions:
a method of data storage, comprising:
reading the contents stored in the storage addresses of the first storage element and the second storage element in the vehicle controller;
generating a trigger storage request if the contents stored in the storage addresses of the first storage element and the second storage element meet a first condition;
responding to the storage triggering request, and updating the content stored in each storage address of the first storage element based on the content stored in each storage address of the second storage element;
the storage addresses of the first storage element and the storage addresses of the second storage element have a mapping relation, the first storage element still stores original storage data under the condition that the vehicle controller is powered off, and the second storage element does not store the original data under the condition that the vehicle controller is powered off.
Optionally, the first condition includes: compared with the data stored in each storage address of the first storage element, the data in at least one storage address in each storage address corresponding to the second storage element is changed.
Optionally, after generating the storage triggering request and before responding to the storage triggering request, the data storage method further includes:
and judging whether the trigger storage request meets a second condition, and responding to the trigger storage request if the trigger storage request meets the second condition.
Optionally, the second condition includes: and the interval between the generation time of the current storage triggering request and the response time of the last storage triggering request is not less than the preset time.
Optionally, the first storage element includes at least one of a first storage region and a second storage region;
the first storage area is used for storing first data, the second storage area is used for storing second data, and the number of times of updating the first data stored in the first storage area is larger than that of updating the second data stored in the second storage area in the life cycle of the vehicle controller.
Optionally, in a life cycle of the vehicle controller, the number of updates of the first data stored in the first storage area is greater than the maximum number of times of flashing of the first storage element, and the number of updates of the second data stored in the second storage area is less than the maximum number of times of flashing of the first storage element.
Optionally, the preset time corresponding to the first storage area is longer than the preset time corresponding to the second storage area;
the preset time corresponding to the first storage area is not less than the life cycle of a vehicle controller/the maximum number of times of writing in the first storage element.
Optionally, the second storage area includes a first sub storage area and a second sub storage area, where the importance of the data stored in the first sub storage area is higher than the importance of the data stored in the second sub storage area.
Optionally, the preset time corresponding to the second sub-storage area is greater than or equal to 100 ms.
Optionally, the data storage method further includes: and if a power-off instruction is received, generating a trigger storage request, and responding to the trigger storage request to update the content stored in each storage address of the first storage element.
A vehicle controller comprising:
a memory module including a first memory element and a second memory element;
a trigger storage module to perform: reading the contents stored in the storage addresses of the first storage element and the second storage element, and generating a trigger storage request if the contents stored in the storage addresses of the first storage element and the second storage element meet a first condition; responding to the storage triggering request, and updating the content stored in each storage address of the first storage element based on the content stored in each storage address of the second storage element;
the storage addresses of the first storage element and the storage addresses of the second storage element have a mapping relation, the first storage element still stores original storage data under the condition that the vehicle controller is powered off, and the second storage element does not store the original data under the condition that the vehicle controller is powered off.
Compared with the prior art, the technical scheme has the following advantages:
in the data storage method provided by the embodiment of the application, each storage address of the first storage element has a mapping relation with each storage address of the second storage element, the first storage element still stores original storage data under the condition that the vehicle controller is powered down, the second storage element does not store the original data under the condition that the vehicle controller is powered down, in the data storage method, only whether the read contents stored in each storage address of the first storage element and the second storage element meet a first condition is judged, if the first condition is met, a trigger storage request can be generated, the trigger storage request is responded, the contents stored in each storage address of the first storage element are updated based on the contents stored in each storage address of the second storage element, and each functional module does not need to independently generate each trigger storage request, therefore, the problem that the sum of the storage triggering requests sent by each functional module exceeds the maximum flash frequency of the storage module is solved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram illustrating a data storage method flow according to an embodiment of the present application;
FIG. 2 is a schematic diagram illustrating a flow of another data storage method according to an embodiment of the present application;
FIG. 3 is a schematic diagram illustrating a flow of another data storage method according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a vehicle controller according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways than those described herein, and it will be apparent to those of ordinary skill in the art that the present application is not limited to the specific embodiments disclosed below.
Next, the present application will be described in detail with reference to the drawings, and in the detailed description of the embodiments of the present application, the cross-sectional views illustrating the structure of the device are not enlarged partially according to the general scale for convenience of illustration, and the drawings are only examples, which should not limit the scope of the protection of the present application. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
As described in the background section, in the data storage method of the existing vehicle controller, in the practical application process, the number of times of triggering storage of the storage module is easily exceeded the maximum number of times of flash of the storage module.
The inventor researches and discovers that the reason is that the updating of each storage signal in the storage module by the trigger storage module in the existing vehicle controller is passively triggered, namely when the running state parameter of the vehicle changes, the functional module corresponding to the state parameter judges whether the change of the state parameter meets the trigger condition, if the change of the state parameter meets the trigger condition, a trigger instruction is generated and sent to the trigger storage module, and the trigger storage module updates the signal stored in the storage module. With the development of electronic technology, people have more and more requirements on the performance of vehicles, correspondingly, more and more functional modules are arranged in the vehicles, and the trigger instructions in the functional modules are independently generated, so that the trigger storage module is easy to exceed the maximum number of times of flash of the storage module when responding to the trigger instructions sent by the functional modules and updating signals stored in the storage module.
In addition, when the data in the storage module is updated, the vehicle data storage method needs each functional module to participate in generating the trigger instruction, the generated trigger instruction is sent to the trigger storage module, and the trigger storage module triggers and stores the storage module, so that signal interaction is complicated in the data storage method of the conventional vehicle controller.
In addition, with the increase of vehicle functions, more and more signals need to be stored, and each time a signal is added to the existing storage module, a trigger condition and a calculation method thereof need to be set for the newly added signal, so that the change of the connection relationship among the trigger storage module, each functional module and the storage module in the vehicle controller is large, and the development efficiency of the vehicle controller is low.
Based on the above research, an embodiment of the present application provides a data storage method, as shown in fig. 1, the method includes the following steps:
s1: and reading the content stored in each storage address of the first storage element and the second storage element in the vehicle controller.
Specifically, in an embodiment of the present application, reading the content stored in each memory address of the first memory element and the second memory element in the vehicle controller includes: reading the content stored in each storage address of a first storage element and a second storage element in a vehicle controller in real time; in another embodiment of the present application, reading the contents stored in the respective memory addresses of the first memory element and the second memory element in the vehicle controller includes: the contents stored in the respective memory addresses of the first memory element and the second memory element in the vehicle controller are read at a preset frequency, which is not limited in the present application, as the case may be.
S2: and generating a trigger storage request if the contents stored in the storage addresses of the first storage element and the second storage element meet a first condition.
Specifically, the step needs to first determine that the content stored in each storage address of the first storage element and the second storage element meets a first condition, and if the content stored in each storage address of the first storage element and the second storage element meets the first condition, a trigger storage request is generated; and if the content stored in each storage address of the first storage element and the second storage element does not meet the first condition, not generating a trigger storage request.
It should be noted that, in the embodiment of the present application, each storage address of the first storage element and each storage address of the second storage element have a mapping relationship; the first storage element still stores original stored data under the condition that the vehicle controller is powered off, such as a signal used for storing a calculated value of the last driving cycle of the vehicle, so that the stored data after the current driving cycle is finished are accumulated and stored after the last driving cycle is finished; the second storage element does not store original data under the condition that the vehicle controller is powered down, namely, the second storage element is used for storing instant operation data generated in the driving process of the vehicle. However, the present application is not limited thereto, as the case may be.
Specifically, on the basis of the above embodiments, in an embodiment of the present application, the data stored in the first storage element includes a running time or state of the entire vehicle, such as a running time of the entire vehicle or a mileage of the entire vehicle.
On the basis of the foregoing embodiments, in an embodiment of the present application, the mapping relationship between the storage addresses of the first storage elements and the storage addresses of the second storage elements includes: each storage address of the first storage element and each storage address of the second storage element have a one-to-one corresponding relationship; the present application is not limited thereto, as the case may be.
Optionally, in an embodiment of the present application, the first storage element may be a ROM memory, and the second storage element may be a RAM memory, which is not limited in this application, as the case may be.
S3: and responding to the trigger storage request, and updating the content stored in each storage address of the first storage element based on the content stored in each storage address of the second storage element.
In the data storage method provided by the embodiment of the application, each storage address of the first storage element and each storage address of the second storage element have a mapping relation, so that in the running process of a vehicle, only the read contents stored in each storage address of the first storage element and the second storage element are required to be judged whether to meet a first condition, if the first condition is met, a trigger storage request can be actively generated, the trigger storage request is responded, the contents stored in each storage address of the first storage element are updated based on the contents stored in each storage address of the second storage element, the statistics of the generation times of the trigger storage request is facilitated, the probability that the response times of the trigger storage request exceed the maximum brushing times of the storage modules is reduced, and the problem that each functional module independently generates and sends each trigger storage request in the existing data storage method is solved, the trigger storage module passively receives the trigger storage request, so that the sum of the trigger storage requests sent by the functional modules is easily beyond the maximum flash frequency of the storage module.
In addition, in the data storage method provided by the embodiment of the application, a trigger storage request can be generated only by judging that the read contents stored in the storage addresses of the first storage element and the second storage element meet a first condition, and the contents stored in the storage addresses of the first storage element are updated in response to the trigger storage request without participation of functional modules, so that the data storage method provided by the application can complete the updating of signals in the storage module only by interaction between the storage module and the trigger storage module, the participation of the functional modules is omitted, and the information interaction times are reduced.
In addition, when updating the data in the first storage element, the data storage method provided by the embodiment of the present application only depends on whether the data stored in each storage address in the first storage element and the content stored in each storage address in the second storage element satisfy the first condition, without considering what the content stored in each storage address in the first storage element and the second storage element specifically is, and therefore, as the vehicle functions increase, and when it is necessary to add a storage signal type in the storage module, the data storage method provided by the embodiment of the present application only needs to set a corresponding storage address in the first storage element and the second storage element to store the signal, without changing the execution process of the data storage method, or changing the signal interaction relationship between the constituent modules involved in each data storage method, and moreover, additional setting of trigger conditions and calculation methods for the newly added storage signal types are not needed, compatibility is high, and development efficiency of the vehicle controller is improved.
On the basis of any one of the above embodiments, in an embodiment of the present application, the first condition includes: compared with the data stored in each storage address of the first storage element, the data in at least one storage address in each storage address corresponding to the second storage element is changed.
Specifically, in the data storage method provided in an embodiment of the present application, compared with the data stored in each storage address of the first storage element, when data in one storage address in the storage address corresponding to the second storage element changes, a trigger storage request may be generated, and the content stored in each storage address of the first storage element is updated in response to the trigger storage request, so as to improve the real-time performance of the data in the first storage element. In another embodiment of the present application, in the data storage method, compared to the data stored in each storage address of the first storage element, when the data in the plurality of storage addresses in the corresponding storage address of the second storage element changes, a trigger storage request is generated, and the content stored in each storage address of the first storage element is updated in response to the trigger storage request, so as to reduce the refresh frequency of the first storage element and prolong the service life of the first storage element.
It should be noted that, in practical applications, there may be a short generation time interval between adjacent storage triggering requests, and if any signal changes, the signal in the first storage element is updated in response to the storage triggering request, so that the response time interval between adjacent storage triggering requests may be short, which may cause a high load on the vehicle controller, so that the vehicle controller cannot respond in time, or even crashes.
In view of the above problem, in an embodiment of the present application, as shown in fig. 2, after generating a trigger storage request and before responding to the trigger storage request, the data storage method further includes: and judging whether the trigger storage request meets a second condition, responding to the trigger storage request if the trigger storage request meets the second condition, and temporarily storing the trigger storage request until the trigger storage request meets the second condition if the trigger storage request does not meet the second condition.
Optionally, in an embodiment of the present application, the second condition includes: the interval between the generation time of the current storage triggering request and the response time of the last storage triggering request is not less than the preset time, so that the situation that a vehicle controller cannot respond due to the fact that the interval between the response times of two adjacent storage triggering requests is too short is avoided. It should be noted that, in the embodiment of the present application, the preset time may be set according to a specific actual situation, which is not limited in the present application and is specifically determined according to the situation.
Specifically, in an embodiment of the present application, after the storage triggering request is generated and before the storage triggering request is responded, the data storage method further needs to determine whether an interval between the generation time of the storage triggering request and the response time of the storage triggering request last time is not less than a preset time, if the interval is not less than the preset time, the storage triggering request is responded, and if the interval is less than the preset time, the storage triggering request is temporarily stored until the interval between the current time and the response time of the storage triggering request last time is not less than the preset time, and then the storage triggering request is responded.
It should be noted that, within a preset time after the response of the last storage triggering request, only one storage triggering request may be generated, two storage triggering requests may be generated, or multiple storage triggering requests may be generated, if only one storage triggering request is generated, the storage triggering request may be responded after the interval between the current time and the response time of the last storage triggering request reaches the preset time, if two storage triggering requests are generated, the storage triggering request may be responded after the interval between the current time and the response time of the last storage triggering request reaches the preset time, that is, the storage triggering request closest to the current time is responded, if multiple storage triggering requests are generated, the interval between the current time and the response time of the last storage triggering request reaches the preset time, the storage request which is triggered for the last time in the multiple storage triggering requests can be responded, namely the storage triggering request which is closest to the current time can be responded, and the storage triggering requests do not need to be responded, so that the updating times of the first storage element are reduced on the basis of updating the data in the first storage element.
Specifically, in an embodiment of the present application, if 1 trigger storage request is generated within a preset time corresponding to each storage area of the first storage element, the trigger storage request needs to be temporarily stored, and after a response time from a last trigger storage request reaches the preset time corresponding to each storage area of the first storage element, the trigger storage request is responded. In another embodiment of the present application, if there are at least 2 trigger storage requests within a preset time corresponding to each storage area of the first storage element, each trigger storage request needs to be temporarily stored, and after a response time from a last trigger storage request reaches the preset time corresponding to each storage area of the first storage element, a latest trigger storage request is responded.
On the basis of any of the above embodiments, in an embodiment of the present application, the first storage element includes at least one of a first storage region and a second storage region. It should be noted that, in the embodiment of the present application, the first storage area may include only one storage area, or may include a plurality of storage areas, and similarly, the second storage area may also include only one storage area, or includes a plurality of storage areas, which is not limited in this application, and is determined as the case may be.
Optionally, in an embodiment of the present application, the first storage area and the second storage area each include a plurality of storage areas, so that each storage area is relatively small, thereby facilitating to accelerate the update speed of each storage area, and meanwhile, when data in each storage area is updated, the amount of data that needs to be updated is relatively large, which affects the data update speed. Optionally, the space of each storage area does not exceed 100 bytes, but the application does not limit this, as the case may be.
On the basis of the above embodiment, in one embodiment of the present application, the first storage area is used for storing first data, the second storage area is used for storing second data, and the update frequency of the first data stored in the first storage area is greater than the update frequency of the second data stored in the second storage area, that is, the number of updates of the first data stored in the first storage area is greater than the number of updates of the second data stored in the second storage area during the life cycle of the vehicle controller.
Specifically, according to the data storage method provided by the embodiment of the application, all the non-power-off storage data are divided into two types according to the updating times of the storage data in the life cycle of the vehicle controller, wherein one type is first data with a large updating time, and the other type is second data with a small updating time, so that the two types of data can be triggered and stored respectively, the two types of data are prevented from existing in one storage area at the same time, the updating times of the data with a small updating time are additionally increased, and the workload of the vehicle controller is further increased.
On the basis of the above-described embodiments, in one embodiment of the present application, in a life cycle of the vehicle controller, the number of updates of the first data stored in the first storage area is greater than the maximum number of times of flashing of the first storage element, and the number of updates of the second data stored in the second storage area is less than the maximum number of times of flashing of the first storage element. It should be noted that, if the number of updates of the data to be stored is equal to the maximum number of times of flashing of the first storage element in the life cycle of the vehicle controller, the data may be stored in the first storage area, and may also be stored in the second storage area, that is, in an embodiment of the present application, in the life cycle of the vehicle controller, the number of updates of the first data stored in the first storage area is greater than or equal to the maximum number of times of flashing of the first storage element, and the number of updates of the second data stored in the second storage area is less than the maximum number of times of flashing of the first storage element; in another embodiment of the present application, the number of updates of the first data stored in the first storage area is greater than the maximum number of times of flashing of the first storage element, and the number of updates of the second data stored in the second storage area is less than or equal to the maximum number of times of flashing of the first storage element, during a life cycle of the vehicle controller. The present application is not limited thereto, as the case may be.
It should be noted that, in the embodiment of the present application, the life cycle of the vehicle controller determines the maximum time of the vehicle operation, specifically, the life cycle of the vehicle controller may be 10000 hours, 20000 hours, or other values, which is not limited in this application, and is determined as the case may be. Optionally, in an embodiment of the present application, the maximum number of times of the first memory element is flashed may be 10 ten thousand times in a life cycle of the vehicle controller, and may also be other values.
Therefore, in the life cycle of the vehicle controller, the number of times of updating the first data is greater than the number of times of updating the second data, that is, the probability that the time interval between two adjacent trigger storages in the first storage area is short is greater than the probability that the time interval between two adjacent trigger storages in the second storage area is short, that is, the probability that the first storage area fails to respond is greater than the probability that the second storage area fails to respond.
Optionally, on the basis of the foregoing embodiment, in an embodiment of the present application, the preset time corresponding to the first storage area is not less than the lifecycle of the vehicle controller/the maximum number of times of flushing of the first storage element, so as to prevent that the total number of times of triggering storage of the first storage area is too large to exceed the maximum number of times of flushing of the first storage element in the lifecycle of the vehicle controller.
On the basis of any one of the above embodiments, in an embodiment of the present application, the second storage area includes a first sub storage area and a second sub storage area, where the importance level of data stored in the first sub storage area is higher than the importance level of data stored in the second sub storage area.
In the embodiment of the present application, the importance level of the stored data is divided according to the importance level of the function corresponding to the stored data, and if the importance level of the function corresponding to a certain stored data is higher, the importance level of the stored data is higher, whereas if the importance level of the function corresponding to a certain stored data is lower, the importance level of the stored data is lower. Specifically, in an embodiment of the present application, the storage data with a high degree of importance includes data of a security class, data of a core technology security class, and the like, while the storage data with a low degree of importance includes data of refrigeration, data of a fine-tuning tape speed target value, and the like.
Optionally, in an embodiment of the present application, the first sub-storage area may include one storage area or may include a plurality of storage areas, and similarly, the second sub-storage areas may include one storage area or may include a plurality of storage areas.
It should be noted that, if the first sub-storage area includes a plurality of storage areas, for the data stored in the first sub-storage area, optionally, the storage data corresponding to an independent function is placed in one storage area, and if the storage data corresponding to the function is more and cannot be stored in one storage area, the storage data can be stored in the plurality of storage areas, so that the interference of updating the storage data corresponding to other functions is avoided; as for the data stored in the second sub-storage area, the storage data corresponding to one function may be placed in one storage area, or the storage data corresponding to a plurality of related functions may be placed in one storage area. The present application is not limited thereto, as the case may be.
Optionally, in an embodiment of the present application, the preset time corresponding to the second sub-storage region is greater than or equal to 100ms, so that it can be further prevented that the second sub-storage region is triggered to be stored too frequently, which results in a failure of the response of the second sub-storage region.
Similarly, the preset time corresponding to the first sub-storage region is greater than or equal to 100ms, so that the first sub-storage region can be further prevented from being triggered to be stored too frequently, and the first sub-storage region cannot respond.
It should be noted that, during the operation of the vehicle, the time when the vehicle stops operating may be just separated from the response time of the last storage request triggered by the preset time, or may not be reached, if the time the vehicle has stopped operating may not be less than the preset time from the last time the response time triggered the storage request, it may result in the next time the vehicle is powered on (the next time the vehicle is started), the data stored in the first memory element does not coincide with the data actually required to be stored in the first memory element, if the first storage element triggers the storage request response for the last time, the running kilometers of the vehicle are 10000 kilometers, and the vehicle stops running within a certain time (the certain time is less than the preset time) after the storage triggering request is responded, at this time, the number of kilometers of the vehicle is 10005 kilometers, which causes a deviation of the actual stored data of the vehicle.
In order to avoid the above situation, on the basis of any of the above embodiments, as shown in fig. 3, in an embodiment of the present application, the data storage method further includes: and if a power-off instruction is received, generating a trigger storage request, responding to the trigger storage request, and updating the contents stored in the storage addresses of the first storage element based on the contents stored in the storage addresses of the second storage element, so that the data used in the next power-on process is consistent with the data (namely the actual operation data of the vehicle) in the last power-off process, and the accuracy of the data stored in the first storage element is improved. In this embodiment, the power-off command may be sent to the trigger storage module by the vehicle controller after detecting that the main switch of the vehicle is powered off or turned off.
Correspondingly, the present application further provides a vehicle controller to implement the data storage method provided in any of the above embodiments, as shown in fig. 4, the vehicle controller includes:
a memory module 100, the memory module 100 including a first memory element and a second memory element;
a trigger storage module 200, the trigger storage module 200 configured to perform: reading the contents stored in the storage addresses of the first storage element and the second storage element, and generating a trigger storage request if the contents stored in the storage addresses of the first storage element and the second storage element meet a first condition; responding to the storage triggering request, and updating the content stored in each storage address of the first storage element based on the content stored in each storage address of the second storage element;
the storage addresses of the first storage element and the storage addresses of the second storage element have a mapping relation, and the first storage element still stores original storage data under the condition that the vehicle controller is powered off, such as a signal for storing a calculated value of a previous driving cycle of a vehicle, so that the data stored after the current driving cycle is finished are accumulated and stored after the last driving cycle is finished; the second storage element does not store original data under the condition that the vehicle controller is powered down, namely, the second storage element is used for storing instant operation data generated in the driving process of the vehicle. However, the present application is not limited thereto, as the case may be. It should be noted that, after reading the content stored in each storage address of the first storage element and the second storage element of the vehicle, the trigger storage module needs to first determine that the content stored in each storage address of the first storage element and the second storage element meets a first condition, and if the content stored in each storage address of the first storage element and the second storage element meets the first condition, a trigger storage request is generated; and if the content stored in each storage address of the first storage element and the second storage element does not meet the first condition, not generating a trigger storage request.
Specifically, in an embodiment of the present application, the trigger storage module is specifically configured to, when executing reading of contents stored in respective storage addresses of a first storage element and a second storage element in a vehicle controller: reading the content stored in each storage address of a first storage element and a second storage element in a vehicle controller in real time; in another embodiment of the present application, the trigger storage module is specifically configured to, when executing reading of contents stored in respective storage addresses of a first storage element and a second storage element in a vehicle controller: the contents stored in the respective memory addresses of the first memory element and the second memory element in the vehicle controller are read at a preset frequency, which is not limited in the present application, as the case may be.
Specifically, on the basis of the above embodiments, in an embodiment of the present application, the data stored in the first storage element includes a running time or state of the entire vehicle, such as a running time of the entire vehicle or a mileage of the entire vehicle.
On the basis of the foregoing embodiments, in an embodiment of the present application, the mapping relationship between the storage addresses of the first storage elements and the storage addresses of the second storage elements includes: each storage address of the first storage element and each storage address of the second storage element have a one-to-one corresponding relationship; in other embodiments of the present application, the mapping between the storage addresses of the first storage elements and the storage addresses of the second storage elements includes: each storage address of the first storage element and each storage address of the second storage element have a one-to-many correspondence relationship, which is not limited in the present application and is determined as the case may be.
Optionally, in an embodiment of the present application, the first storage element may be a ROM memory, and the second storage element may be a RAM memory, which is not limited in this application, as the case may be.
In the vehicle controller provided in the embodiment of the application, each storage address of the first storage element and each storage address of the second storage element have a mapping relationship, so that in the running process of a vehicle, the trigger storage module only needs to judge whether the read contents stored in each storage address of the first storage element and the second storage element meet a first condition, if the first condition is met, the trigger storage request can be actively generated, the trigger storage request is responded, the contents stored in each storage address of the first storage element are updated based on the contents stored in each storage address of the second storage element, the statistics of the generation times of the trigger storage request is facilitated, the probability that the response times of the trigger storage request exceed the maximum brushing times of the storage module is reduced, and the problem that each functional module independently generates and sends the respective trigger storage request in the existing vehicle controller is solved, the trigger storage module passively receives the trigger storage request, so that the sum of the trigger storage requests sent by the functional modules is easily beyond the maximum flash frequency of the storage module.
In addition, in the vehicle controller provided by the embodiment of the application, the trigger storage module can generate the trigger storage request only by judging that the read contents stored in the storage addresses of the first storage element and the second storage element meet the first condition, and update the contents stored in the storage addresses of the first storage element in response to the trigger storage request without participation of the function modules, so that the vehicle controller provided by the application can update the signals in the storage modules only by interaction between the storage modules and the trigger storage modules, thereby omitting participation of the function modules and reducing the information interaction times.
In addition, in the vehicle controller provided in the embodiment of the present application, when updating the data in the first storage element, only depending on whether the data stored in each storage address in the first storage element and the content stored in each storage address in the second storage element satisfy the first condition, without considering what the content stored in each storage address in the first storage element and the second storage element specifically is, therefore, as the vehicle functions increase, when it is necessary to add a storage signal type in the storage module, the vehicle controller provided in the embodiment of the present application only needs to set a corresponding storage address in the first storage element and the second storage element to store the signal, without changing the execution process of the trigger storage module, and without changing the signal interaction relationship between the related component modules in the vehicle controller, and moreover, additional setting of trigger conditions and calculation methods for the newly added storage signal types are not needed, compatibility is high, and development efficiency of the vehicle controller is improved.
On the basis of any one of the above embodiments, in an embodiment of the present application, the first condition includes: compared with the data stored in each storage address of the first storage element, the data in at least one storage address in each storage address corresponding to the second storage element is changed.
Specifically, in the vehicle controller provided in an embodiment of the present application, when data in one storage address is changed in the storage address corresponding to the second storage element compared to data stored in each storage address of the first storage element, the trigger storage module may generate a trigger storage request, and update the content stored in each storage address of the first storage element based on the content stored in each storage address of the second storage element in response to the trigger storage request, so as to improve the real-time performance of the data in the first storage element. In another embodiment of the present application, in the vehicle controller, when data in a plurality of memory addresses is changed in a memory address corresponding to the second memory element compared to data stored in each memory address of the first memory element, the trigger memory module generates a trigger memory request, and updates, in response to the trigger memory request, contents stored in each memory address of the first memory element based on contents stored in each memory address of the second memory element, so as to reduce a refresh frequency of the first memory element and prolong a service life of the first memory element.
It should be noted that, in practical applications, there may be a short generation time interval between adjacent storage triggering requests, and if any signal changes, the signal in the first storage element is updated in response to the storage triggering request, so that the response time interval between adjacent storage triggering requests may be short, which may cause a high load on the vehicle controller, so that the vehicle controller cannot respond in time, or even crashes.
In view of the above problem, in an embodiment of the present application, the trigger storage module is further configured to, after generating a trigger storage request and before responding to the trigger storage request, determine whether the trigger storage request satisfies a second condition, respond to the trigger storage request if the trigger storage request satisfies the second condition, and temporarily store the trigger storage request until the trigger storage request satisfies the second condition if the trigger storage request does not satisfy the second condition.
Optionally, in an embodiment of the present application, the second condition includes: and the interval between the generation time of the current storage triggering request and the response time of the last storage triggering request is larger than the preset time, so that the condition that the vehicle controller cannot respond due to the fact that the interval between the response times of two adjacent storage triggering requests is too short is avoided. It should be noted that, in the embodiment of the present application, the preset time may be set according to a specific actual situation, which is not limited in the present application and is specifically determined according to the situation.
Specifically, in an embodiment of the present application, after a storage triggering request is generated and before the storage triggering request is responded, the storage triggering module further needs to determine whether an interval between the generation time of the storage triggering request and the response time of the storage triggering request last time is not less than a preset time, if the interval is not less than the preset time, the storage triggering request is responded, and if the interval is less than the preset time, the storage triggering request is temporarily stored until the interval between the current time and the response time of the storage triggering request last time is not less than the preset time, and then the storage triggering request is responded.
It should be noted that, within a preset time after the last time of triggering the storage request response, only one triggering storage request may be generated, or at least two triggering storage requests may be generated, if the storage triggering request is generated only once, the storage triggering request can be responded after the interval between the current time and the response time of the last storage triggering request reaches the preset time, if the storage request is triggered at least twice, after the interval between the current time and the response time of the last storage request triggered reaches the preset time, the storage request closest to the current time in the at least two storage triggering requests can be responded without responding to all the storage triggering requests, therefore, the updating times of the first storage element are reduced on the basis of updating the data in the first storage element.
On the basis of any of the above embodiments, in an embodiment of the present application, the first storage element includes at least one of a first storage region and a second storage region. It should be noted that, in the embodiment of the present application, the first storage area may include only one storage area, or may include a plurality of storage areas, and similarly, the second storage area may also include only one storage area, or includes a plurality of storage areas, which is not limited in this application, and is determined as the case may be.
Optionally, in an embodiment of the present application, the first storage area and the second storage area each include a plurality of storage areas, so that each storage area is relatively small, thereby facilitating to accelerate the update speed of each storage area, and meanwhile, when data in each storage area is updated, the amount of data that needs to be updated is relatively large, which affects the data update speed. Optionally, the space of each storage area does not exceed 100 bytes, but the application does not limit this, as the case may be.
On the basis of the above embodiment, in one embodiment of the present application, the first storage area is used for storing first data, the second storage area is used for storing second data, and the update frequency of the first data stored in the first storage area is greater than the update frequency of the second data stored in the second storage area, that is, the number of updates of the first data stored in the first storage area is greater than the number of updates of the second data stored in the second storage area during the life cycle of the vehicle controller.
Specifically, according to the vehicle controller provided by the embodiment of the application, all the non-power-off storage data are divided into two types according to the updating times of the storage data in the life cycle of the vehicle controller, wherein one type is first data with a large updating time, and the other type is second data with a small updating time, so that the two types of data can be triggered and stored respectively, the two types of data are prevented from existing in one storage area at the same time, the updating times of the data with a small updating time are additionally increased, and the workload of the vehicle controller is further increased.
On the basis of the above-mentioned embodiments, in one embodiment of the present application, in the life cycle of the vehicle controller, the number of updates of the first data stored in the first storage area is greater than the maximum number of times of flushing of the first storage element, and the number of updates of the second data stored in the second storage area is less than the maximum number of times of flushing of the first storage element, it should be noted that if, in the life cycle of the vehicle controller, the case where the number of updates of the data to be stored is equal to the maximum number of times of flushing of the first storage element can be stored in the first storage area, and also can be stored in the second storage area, that is, in one embodiment of the present application, in the life cycle of the vehicle controller, the number of updates of the first data stored in the first storage area is greater than or equal to the maximum number of times of flushing of the first storage element, the number of updates of the second data stored in the second storage area is smaller than the maximum number of times of the flash of the first storage element; in another embodiment of the present application, the number of updates of the first data stored in the first storage area is greater than the maximum number of times of flashing of the first storage element, and the number of updates of the second data stored in the second storage area is less than or equal to the maximum number of times of flashing of the first storage element, during a life cycle of the vehicle controller. The present application is not limited thereto, as the case may be.
It should be noted that, in the embodiment of the present application, the life cycle of the vehicle controller determines the maximum time of the vehicle operation, specifically, the life cycle of the vehicle controller may be 10000 hours, 20000 hours, or other values, which is not limited in the present application, and is determined as the case may be. Optionally, in an embodiment of the present application, the maximum number of times of the first memory element is flashed may be 10 ten thousand times in a life cycle of the vehicle controller, and may also be other values.
Therefore, in the life cycle of the vehicle controller, the number of times of updating the first data is greater than the number of times of updating the second data, that is, the probability that the time interval between two adjacent trigger storages in the first storage area is short is greater than the probability that the time interval between two adjacent trigger storages in the second storage area is short, that is, the probability that the first storage area fails to respond is greater than the probability that the second storage area fails to respond.
Optionally, on the basis of the foregoing embodiment, in an embodiment of the present application, the preset time corresponding to the first storage area is not less than the lifecycle of the vehicle controller/the maximum number of times of flushing of the first storage element, so as to prevent that the total number of times of triggering storage of the first storage area is too large to exceed the maximum number of times of flushing of the first storage element in the lifecycle of the vehicle controller.
On the basis of any of the foregoing embodiments, in an embodiment of the present application, the second storage area includes a first sub storage area and a second sub storage area, where the importance degree of the data stored in the first sub storage area is higher than the importance degree of the data stored in the second sub storage area.
In the embodiment of the present application, the importance level of the stored data is divided according to the importance level of the function corresponding to the stored data, and if the importance level of the function corresponding to a certain stored data is higher, the importance level of the stored data is higher, whereas if the importance level of the function corresponding to a certain stored data is lower, the importance level of the stored data is lower. Specifically, in an embodiment of the present application, the storage data with a high degree of importance includes data of a security class, data of a core technology security class, and the like, while the storage data with a low degree of importance includes data of refrigeration, data of a fine-tuning tape speed target value, and the like.
Optionally, in an embodiment of the present application, the first sub-storage area may include one storage area or may include a plurality of storage areas, and similarly, the second sub-storage area may include one storage area or may include a plurality of storage areas, which is not limited in this application and is determined as the case may be. It should be noted that, if the first sub-storage area includes a plurality of storage areas, for the data stored in the first sub-storage area, optionally, the storage data corresponding to an independent function is placed in one storage area, and if the storage data corresponding to the function is more than that and cannot be stored in one storage area, the storage data can be stored in the plurality of storage areas, so that the interference of updating the storage data corresponding to other functions is avoided; as for the data stored in the second sub-storage area, the storage data corresponding to one function may be placed in one storage area, or the storage data corresponding to a plurality of related functions may be placed in one storage area. The present application is not limited thereto, as the case may be.
Optionally, in an embodiment of the present application, each of the first sub-storage area and the second sub-storage area includes a plurality of storage areas, so that each storage area is relatively small, thereby facilitating to accelerate the update speed of each storage area, and meanwhile, when data in each storage area is updated, the data amount that needs to be updated is relatively large, which affects the data update speed. Optionally, in an embodiment of the present application, the preset time corresponding to the second sub-storage region is greater than or equal to 100ms, so that it can be further prevented that the second sub-storage region is triggered to be stored too frequently, which results in a failure of the response of the second sub-storage region.
Similarly, the preset time corresponding to the first sub-storage area is greater than or equal to 100ms, so that the first storage area is further prevented from being triggered to be stored too frequently, and the first storage area does not respond.
On the basis of any of the foregoing embodiments, in an embodiment of the present application, the trigger storage module is further configured to execute: and if a power-off instruction is received, generating a trigger storage request, responding to the trigger storage request, and updating the contents stored in the storage addresses of the first storage element based on the contents stored in the storage addresses of the second storage element, so that the data used in the next power-on process is consistent with the data (namely the actual operation data of the vehicle) in the last power-off process, and the accuracy of the data stored in the first storage element is improved.
In summary, in the vehicle controller and the data storage method thereof provided in the embodiment of the present application, each storage address of the first storage element and each storage address of the second storage element have a mapping relationship, so that in a vehicle operation process, only whether the content stored in each storage address of the first storage element and the second storage element that is read meets a first condition needs to be determined, if the first condition is met, a trigger storage request can be actively generated, and the trigger storage request is responded, the content stored in each storage address of the first storage element is updated based on the content stored in each storage address of the second storage element, thereby facilitating statistics of the generation times of the trigger storage request, reducing the probability that the response times of the trigger storage request exceed the maximum write times of the storage module, and solving the problem that each functional module independently generates and sends a respective trigger storage request in the existing data storage method, the trigger storage module passively receives the trigger storage request, so that the sum of the trigger storage requests sent by the functional modules is easily beyond the maximum flash frequency of the storage module.
In addition, in the vehicle controller and the data storage method thereof provided by the embodiment of the application, a trigger storage request can be generated only by judging that the read contents stored in the storage addresses of the first storage element and the second storage element meet a first condition, and the contents stored in the storage addresses of the first storage element are updated in response to the trigger storage request without participation of the functional modules, so that the data storage method provided by the application can update signals in the storage module only by interaction between the storage module and the trigger storage module, the participation of the functional modules is omitted, and the information interaction times are reduced.
In addition, as the vehicle functions are increased and the types of the storage signals need to be added to the storage module, the vehicle controller and the data storage method thereof provided by the embodiment of the application only need to set corresponding storage addresses in the first storage element and the second storage element to store the signals, do not need to change the execution process of the data storage method, do not need to change the signal interaction relationship among the component modules involved in each data storage method, and do not need to additionally set a trigger condition and a calculation method thereof for the types of the newly added storage signals, so that the compatibility is strong, and the development efficiency of the vehicle controller is improved.
In the description, each part is described in a progressive manner, each part is emphasized to be different from other parts, and the same and similar parts among the parts are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A method of storing data, comprising:
reading the contents stored in the storage addresses of the first storage element and the second storage element in the vehicle controller;
generating a trigger storage request if the contents stored in the storage addresses of the first storage element and the second storage element meet a first condition;
judging whether the trigger storage request meets a second condition, if so, responding to the trigger storage request, updating the content stored in each storage address of the first storage element based on the content stored in each storage address of the second storage element, and if not, temporarily storing the trigger storage request until the trigger storage request meets the second condition;
the storage addresses of the first storage element and the storage addresses of the second storage element have a mapping relation, the first storage element still stores original storage data under the condition that the vehicle controller is powered off, and the second storage element does not store the original data under the condition that the vehicle controller is powered off;
the mapping relationship between each storage address of the first storage element and each storage address of the second storage element comprises the following steps: the storage addresses of the first storage elements and the storage addresses of the second storage elements have a one-to-one correspondence relationship.
2. The data storage method of claim 1, wherein the first condition comprises: compared with the data stored in each storage address of the first storage element, the data in at least one storage address in each storage address corresponding to the second storage element is changed.
3. The data storage method of claim 1, wherein the second condition comprises: and the interval between the generation time of the current storage triggering request and the response time of the last storage triggering request is not less than the preset time.
4. The data storage method of claim 3, wherein the first storage element includes at least one of a first storage area and a second storage area;
the first storage area is used for storing first data, the second storage area is used for storing second data, and the number of times of updating the first data stored in the first storage area is larger than that of updating the second data stored in the second storage area in the life cycle of the vehicle controller.
5. The data storage method according to claim 4, wherein the number of updates of the first data stored in the first storage area is greater than the maximum number of times of the first memory element and the number of updates of the second data stored in the second storage area is less than the maximum number of times of the first memory element during a life cycle of the vehicle controller.
6. The data storage method according to claim 5, wherein the preset time corresponding to the first storage area is longer than the preset time corresponding to the second storage area;
the preset time corresponding to the first storage area is not less than the life cycle of a vehicle controller/the maximum number of times of writing in the first storage element.
7. The data storage method according to any one of claims 4 to 6, wherein the second storage area includes a first sub storage area and a second sub storage area, wherein the first sub storage area stores data more importantly than the second sub storage area.
8. The data storage method of claim 7, wherein the preset time corresponding to the second sub storage area is greater than or equal to 100 ms.
9. The data storage method of claim 1, wherein the data storage method further comprises: and if a power-off instruction is received, generating a trigger storage request, and responding to the trigger storage request to update the content stored in each storage address of the first storage element.
10. A vehicle controller, characterized by comprising:
a memory module including a first memory element and a second memory element;
a trigger storage module to perform: reading the contents stored in the storage addresses of the first storage element and the second storage element, and generating a trigger storage request if the contents stored in the storage addresses of the first storage element and the second storage element meet a first condition; judging whether the trigger storage request meets a second condition, if so, responding to the trigger storage request, updating the content stored in each storage address of the first storage element based on the content stored in each storage address of the second storage element, and if not, temporarily storing the trigger storage request until the trigger storage request meets the second condition;
the storage addresses of the first storage element and the storage addresses of the second storage element have a mapping relation, the first storage element still stores original storage data under the condition that the vehicle controller is powered off, and the second storage element does not store the original data under the condition that the vehicle controller is powered off; the mapping relationship between each storage address of the first storage element and each storage address of the second storage element comprises the following steps: the storage addresses of the first storage elements and the storage addresses of the second storage elements have a one-to-one correspondence relationship.
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