CN115686554A - BootLoader program upgrading method and device - Google Patents
BootLoader program upgrading method and device Download PDFInfo
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- CN115686554A CN115686554A CN202110875191.6A CN202110875191A CN115686554A CN 115686554 A CN115686554 A CN 115686554A CN 202110875191 A CN202110875191 A CN 202110875191A CN 115686554 A CN115686554 A CN 115686554A
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Abstract
The embodiment of the application discloses a BootLoader program upgrading method, wherein an additional storage space, namely a first storage space, is reserved and is used for storing a BootLoader program of the latest version. After the MCU is powered on or reset, whether a BootLoader program exists in the first storage space is judged firstly, if the BootLoader program exists in the first storage space, the BootLoader program in the original storage space (the second storage space) needs to be upgraded, the BootLoader program in the first storage space is copied to the second storage space, and after the copying is finished, the BootLoader program in the first storage space is erased. Therefore, the BootLoader program in the MCU can be upgraded by the scheme provided by the embodiment of the application, so that the working efficiency is improved, and the upgrading cost is reduced.
Description
Technical Field
The application relates to the technical field of vehicle control, in particular to a BootLoader program upgrading method and device.
Background
At present, most of Microcontroller units (MCUs) on automobiles store boot loader (BootLoader) programs, and the BootLoader programs are mainly used for online upgrading of application programs in the MCUs, so that new functions of products can be added or potential bugs can be repaired through upgrading. With the function of the automobile product becoming more and more complex, the Bootloader program is prompted to support some new features or functions, and the Bootloader program itself needs to be upgraded.
Under normal conditions, the Bootloader program is relatively reliable and cannot be changed, so that the Bootloader program can be written into the MCU in a burning mode before the MCU leaves a factory. If the problem occurs, the vehicle needs to be recalled, and the MCU is taken down from the vehicle so as to burn the Bootloader program on the MCU again.
However, when the MCU is packaged inside a device and the device has no reserved upgrade interface, disassembling the MCU will cause the device to be damaged, increasing upgrade cost. For example, an MCU in the battery management system is packaged in a battery pack, and when a BootLoader program has a problem, the battery pack must be removed to re-burn the BootLoader program. Therefore, how to reduce the upgrade cost of the BootLoader program is a technical problem to be solved urgently.
Disclosure of Invention
In view of this, embodiments of the present application provide a method and an apparatus for upgrading a BootLoader program, so as to implement automatic upgrading of the BootLoader program without removing an MCU, thereby reducing the upgrading cost.
In order to achieve the above purpose, the technical solutions provided in the embodiments of the present application are as follows:
in a first aspect of the embodiments of the present application, a BootLoader program upgrading method is provided, where after a micro control unit MCU is powered on or reset, the method includes:
judging whether a BootLoader program exists in a first storage space, wherein the first storage space is used for storing the BootLoader program of the latest version;
when the BootLoader program exists in the first storage space, copying the BootLoader program to a second storage space;
and erasing the BootLoader program in the first storage space.
In a specific implementation, the method further includes:
when the BootLoader program does not exist in the first storage space, judging whether a currently received upgrading request is a BootLoader program upgrading request or not;
if yes, operating the BootLoader program in the second storage space to trigger the downloading of the BootLoader program of the latest version;
and storing the downloaded BootLoader program of the latest version in the first storage space.
In a specific implementation, the method further includes:
when power failure or reset occurs in the process of copying the BootLoader program to the second storage space, the operation of erasing the BootLoader program in the first storage space is not executed.
In a specific implementation manner, the determining whether the BootLoader program exists in the first storage space includes:
reading an upgrade flag field from the first storage space;
and when the upgrading flag field is a first preset threshold value, determining that the BootLoader program exists in the first storage space.
In a specific implementation, the method further includes:
and after the BootLoader program in the first storage space is erased, setting the upgrading mark field as a second preset threshold value.
In a second aspect of an embodiment of the present application, there is provided a BootLoader program upgrading apparatus, including: the system comprises a boot module, a BootLoader module and a reserved first storage space, wherein the first storage space is used for storing a BootLoader program of the latest version;
the boot module is used for judging whether a BootLoader program exists in the first storage space after the MCU is powered on or reset;
the boot module is further configured to copy the BootLoader program to a second storage space when the BootLoader program exists in the first storage space;
the boot module is further configured to erase the BootLoader program in the first storage space after copying the BootLoader program in the first storage space to the second storage space;
and the BootLoader module is used for executing a BootLoader program in the second storage space.
In a specific implementation manner, the boot module is further configured to, when the BootLoader program does not exist in the first storage space, determine whether a currently received upgrade request is a BootLoader program upgrade request; when the currently received upgrade request is the BootLoader program upgrade request, controlling the BootLoader module to execute the BootLoader program in the second storage space so as to trigger downloading of the BootLoader program of the latest version;
the boot module is further configured to store the downloaded BootLoader program of the latest version in the first storage space.
In a specific implementation, the boot module is specifically configured to read an upgrade flag field from the first storage space; and when the upgrading mark field is a first preset threshold value, determining that the BootLoader program exists in the first storage space.
In a specific implementation manner, the boot module is further configured to set the upgrade flag field to a second preset threshold after erasing the BootLoader program in the first storage space.
In a third aspect of embodiments of the present application, there is provided a micro control unit, including: a processor, a memory;
the memory for storing computer readable instructions or a computer program;
the processor is configured to read the computer readable instruction or the computer program, so that the device implements the BootLoader program upgrading method according to the first aspect.
In a fourth aspect of embodiments of the present application, a computer-readable storage medium is provided, which includes instructions or a computer program, and when the computer-readable storage medium runs on a computer, the computer is caused to execute the BootLoader program upgrading method described in the first aspect above.
Therefore, the embodiment of the application has the following beneficial effects:
the embodiment of the application reserves an additional storage space, namely a first storage space, and is used for storing the BootLoader program of the latest version. After the MCU is powered on or reset, whether a BootLoader program exists in the first storage space or not is judged firstly, if the first storage space exists, the BootLoader program in the original storage space (the second storage space) needs to be upgraded, the BootLoader program in the first storage space is copied to the second storage space, and after the copying is finished, the BootLoader program in the first storage space is erased. Therefore, the BootLoader program in the MCU can be upgraded by the scheme provided by the embodiment of the application, so that the working efficiency is improved, and the upgrading cost is reduced.
Drawings
Fig. 1 is a structural diagram of a BootLoader program upgrading device according to an embodiment of the present disclosure;
fig. 2 is a flowchart of a BootLoader program upgrading method provided in an embodiment of the present application.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the drawings are described in detail below.
In order to facilitate understanding of the technical solutions of the embodiments of the present application, the following description will first discuss technical terms related to the embodiments of the present application.
Bootloader is a first section of code executed by an embedded system after power-on, after the embedded system completes initialization of a CPU and related hardware, an operating system image or a solidified embedded application program is loaded into a memory and then jumps to a space where an operating system is located, and the software and hardware environment of the system is brought to a proper state so as to prepare a correct environment for finally calling an operating system kernel and further start the operating system to run.
For convenience of understanding, the BootLoader program upgrading device provided in the embodiments of the present application will be described below with reference to the accompanying drawings.
Referring to fig. 1, which is a structural diagram of a BootLoader program upgrading apparatus according to an embodiment of the present disclosure, as shown in fig. 1, the apparatus 100 may include: a boot module 101, a BootLoader module 102, a first memory space 103, and a second memory space 104. The boot module 101 and the first storage space 103 are additionally added modules.
The first storage space 103 is only used for storing the BootLoader program of the latest version.
And the boot module 101 is configured to determine whether the BootLoader program exists in the first storage space after the MCU is powered on or reset. If the BootLoader program exists in the first storage space 103, it indicates that the BootLoader program in the second storage space 104 needs to be updated. Specifically, the boot module 101 reads an upgrade flag field from the first storage space 103, and determines whether the latest version of BootLoader program exists in the first storage space 103 through the upgrade flag field. When the upgrading mark field is a first preset threshold value, determining that a BootLoader program exists in the first storage space; and when the upgrading flag field is a second preset threshold value, determining that the BootLoader program does not exist in the first storage space. The first preset threshold and the second preset threshold can be used for equipment according to actual requirements. For example, the first preset threshold is 1, and the second preset threshold is 0.
The boot module 101 is further configured to copy the BootLoader program to the second storage space 104 when it is determined that the BootLoader program exists in the first storage space 103. In order to avoid that the working of the BootLoader module is affected by updating the BootLoader program in the second storage space again because the version of the BootLoader program in the first storage space changes after the MCU is powered on or reset again next time, the BootLoader program in the first storage space 103 is erased after the BootLoader program in the first storage space 103 is copied to the second storage space 104. Meanwhile, the upgrade flag field in the first storage space 103 is set to a second preset threshold. The quotation mark module 101 can also be used for performing integrity check on an application program APP in the MCU.
In addition, before copying the BootLoader program in the first storage space to the second storage space, the BootLoader program in the second storage space is deleted.
After the copy operation is completed, the BootLoader module 102 executes a BootLoader program in the second storage space to complete initialization of the relevant application.
It should be noted that, in this embodiment, the first storage space 103 is only used for storing the BootLoader program of the latest version, and development of any software logic is not permitted. That is to say, when the BootLoader module runs the BootLoader program, the BootLoader module only executes the BootLoader program in the second storage space.
In a specific implementation manner, when it is determined that the BootLoader program does not exist in the first storage space 103 and the bootstrap module 101 receives the upgrade request, the bootstrap module 101 is further configured to determine whether the currently received upgrade request is a BootLoader program upgrade request. If yes, controlling a BootLoader module to execute a BootLoader program in the second storage space so as to trigger the downloading of the BootLoader program of the latest version; the boot module 101 is further configured to store the downloaded BootLoader program of the latest version in the first storage space 103.
It should be noted that any type of program upgrade in the MCU requires running a BootLoader program, so that when upgrading itself, the BootLoader module is also required to run the BootLoader program in the second storage space. After the BootLoader program of the latest version has the first storage space, the value of the upgrade flag field needs to be modified, and the upgrade flag field is modified to the first preset threshold value, so that the BootLoader program of the second storage space is upgraded when the MCU is powered on again or reset.
When the upgrade request received by the boot module is not a BootLoader program upgrade request, indicating that the upgrade request is an application program upgrade request, the boot module 101 is further configured to control the BootLoader module to run a BootLoader program in the second storage space, so as to download the application program of the latest version, and then complete the upgrade of the application program. And the application program in the MCU is used for realizing the normal function of the MCU.
It should be noted that, when the Bootloader module downloads the upgrade software, a power failure, a reset, or an interruption of downloading occurs, and since the Bootloader program in the second storage space is not affected, when the MCU is restarted, the Bootloader module will continue to execute the downloading operation. The re-download will not be affected. In addition, in the process that the boot module copies the BootLoader program in the first storage space to the second storage space, power failure or reset occurs, and since the copying operation is not completed and the erasing operation is not executed, the integrity of the BootLoader program in the first storage space is not affected, the MCU restarts the boot module and can continue to upgrade the BootLoader program, and the BootLoader program in the first storage space cannot be erased until the BootLoader program in the first storage space is successfully copied to the second storage space, so that the successful upgrading of the BootLoader program is ensured.
Based on the above device, the BootLoader program upgrading method provided by the embodiment of the present application will be described below with reference to the accompanying drawings.
Referring to fig. 2, which is a flowchart of a BootLoader program upgrading method provided in an embodiment of the present application, as shown in fig. 2, the method may include:
s201: judging whether a BootLoader program exists in the first storage space, and if so, executing S202; if not, S204 is performed.
In this embodiment, after the MCU is powered on or reset, the boot module determines whether the BootLoader program exists in the first storage space. The first storage space is only used for storing the BootLoader program of the latest version. That is, after the MCU is powered on or reset, the boot module is executed first to determine whether the BootLoader program exists in the first storage space, and if yes, S202 is executed; otherwise, S204 is performed. Specifically, the boot module may, upon execution, read the upgrade flag field from the first storage space; and when the upgrading flag field is the first preset threshold value, determining that a BootLoader program exists in the first storage space, and executing S202.
S202: and copying the BootLoader program in the first storage space to the second storage space.
When the BootLoader program exists in the first storage space, the BootLoader program in the second storage space needs to be updated, and the BootLoader program in the first storage space is copied to the second storage space. The BootLoader program of the second storage space is a BootLoader program which needs to be executed to realize the BootLoader function.
It should be noted that, before copying the BootLoader program in the first storage space to the second storage space, the BootLoader program of the old version in the second storage space needs to be deleted, and then the BootLoader program of the latest version is copied to the second storage space.
S203: and erasing the BootLoader program in the first storage space.
After the BootLoader program in the first storage space is copied to the second storage space, the BootLoader program in the first storage space is prevented from repeatedly executing copy operation when the MCU is powered on or reset again. Meanwhile, the upgrading mark field in the first storage space can be modified from a first preset threshold value to a second preset threshold value.
S204: judging whether the currently received upgrading request is a BootLoader program upgrading request, if so, executing S205; otherwise, S207 is executed.
When the BootLoader program does not exist in the first storage space and the upgrade request is currently received, judging whether the currently received upgrade request is the BootLoader program upgrade request, if so, executing S205 to download the BootLoader program of the latest version by operating the BootLoader program in the second storage space. If the received upgrade request is not the BootLoader program upgrade request, and the upgrade request is the upgrade of the application program in the MCU, S207 is executed, and the BootLoader program in the second storage space is run to trigger the download of the application program of the latest version.
S205: and running the BootLoader program in the second storage space to trigger the downloading of the BootLoader program of the latest version.
It should be noted that, in the process of executing the BootLoader program of the latest version, power failure, reset or download interruption occurs, and since the BootLoader program still exists in the second storage space, when the MCU is restarted, the MCU continues to execute the download operation.
S206: and storing the downloaded BootLoader program of the latest version in the first storage space.
After downloading the BootLoader program of the latest version, storing the BootLoader program of the latest version in the first storage space. Meanwhile, an upgrading flag field in the first storage space is set to be a first preset threshold value.
S207: and running the BootLoader program in the second storage space to trigger the downloading of the application program with the latest version.
In a specific implementation manner, when power failure or reset occurs in the process of copying the BootLoader program in the first storage space to the second storage space, the operation of erasing the BootLoader program in the first storage space is not executed, so that when the MCU is restarted, the upgrading operation is continuously executed to copy the BootLoader program in the first storage space to the second storage space, thereby ensuring successful upgrading.
Therefore, through the embodiment of the application, an additional storage space, namely a first storage space, is reserved for storing the BootLoader program of the latest version. After the MCU is powered on or reset, whether a BootLoader program exists in the first storage space or not is judged firstly, if the first storage space exists, the BootLoader program in the original storage space (the second storage space) needs to be upgraded, the BootLoader program in the first storage space is copied to the second storage space, and after the copying is finished, the BootLoader program in the first storage space is erased. Therefore, the BootLoader program in the MCU can be upgraded by the scheme provided by the embodiment of the application, so that the working efficiency is improved, and the upgrading cost is reduced.
In addition, an embodiment of the present application provides a micro control unit, including: a processor, a memory;
the memory for storing computer readable instructions or a computer program;
the processor is configured to read the computer readable instructions or the computer program, so as to enable the device to implement the BootLoader program upgrading method.
An embodiment of the present application provides a computer-readable storage medium, which includes instructions or a computer program, and when the computer-readable storage medium runs on a computer, the computer is caused to execute the BootLoader program upgrading method described above.
It should be noted that, in the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. For the system or the device disclosed by the embodiment, the description is simple because the system or the device corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
It should be understood that in the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" for describing an association relationship of associated objects, indicating that there may be three relationships, e.g., "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
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 BootLoader program upgrading method is characterized in that after a Micro Control Unit (MCU) is powered on or reset, the method comprises the following steps:
judging whether a BootLoader program exists in a first storage space, wherein the first storage space is used for storing the BootLoader program of the latest version;
when the BootLoader program exists in the first storage space, copying the BootLoader program to a second storage space;
and erasing the BootLoader program in the first storage space.
2. The method of claim 1, further comprising:
when the BootLoader program does not exist in the first storage space, judging whether a currently received upgrading request is a BootLoader program upgrading request or not;
if yes, operating the BootLoader program in the second storage space to trigger the downloading of the BootLoader program of the latest version;
and storing the downloaded BootLoader program of the latest version in the first storage space.
3. The method according to claim 1 or 2, characterized in that the method further comprises:
when power failure or reset occurs in the process of copying the BootLoader program to the second storage space, the operation of erasing the BootLoader program in the first storage space is not executed.
4. The method according to any one of claims 1 to 3, wherein the determining whether the BootLoader program exists in the first storage space comprises:
reading an upgrade flag field from the first storage space;
and when the upgrading mark field is a first preset threshold value, determining that the BootLoader program exists in the first storage space.
5. The method of claim 4, further comprising:
and after the BootLoader program in the first storage space is erased, setting the upgrading mark field as a second preset threshold value.
6. A BootLoader program upgrading apparatus, the apparatus comprising: the system comprises a boot module, a BootLoader module and a reserved first storage space, wherein the first storage space is used for storing a BootLoader program of the latest version;
the boot module is used for judging whether a BootLoader program exists in the first storage space after the MCU is powered on or reset;
the boot module is further configured to copy the BootLoader program to a second storage space when the BootLoader program exists in the first storage space;
the boot module is further configured to erase the BootLoader program in the first storage space after copying the BootLoader program in the first storage space to the second storage space;
and the BootLoader module is used for executing a BootLoader program in the second storage space.
7. The apparatus according to claim 6, wherein the boot module is further configured to, when the BootLoader program does not exist in the first storage space, determine whether a currently received upgrade request is a BootLoader program upgrade request; when the currently received upgrade request is the BootLoader program upgrade request, controlling the BootLoader module to execute the BootLoader program in the second storage space so as to trigger downloading of the BootLoader program of the latest version;
the boot module is further configured to store the downloaded BootLoader program of the latest version in the first storage space.
8. The apparatus according to claim 6 or 7, wherein the boot module is specifically configured to read an upgrade flag field from the first storage space; and when the upgrading mark field is a first preset threshold value, determining that the BootLoader program exists in the first storage space.
9. The apparatus of claim 8, wherein the boot module is further configured to set the upgrade flag field to a second preset threshold after erasing the BootLoader program in the first storage space.
10. A micro-control unit, comprising: a processor, a memory;
the memory for storing computer readable instructions or a computer program;
the processor, configured to read the computer readable instructions or the computer program, so as to enable the device to implement the BootLoader program upgrading method according to any one of claims 1 to 5.
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| CN202110875191.6A CN115686554A (en) | 2021-07-30 | 2021-07-30 | BootLoader program upgrading method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116302019A (en) * | 2023-05-11 | 2023-06-23 | 江苏大秦新能源科技有限公司 | BootLoader program self-updating method, system and storage medium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116302019A (en) * | 2023-05-11 | 2023-06-23 | 江苏大秦新能源科技有限公司 | BootLoader program self-updating method, system and storage medium |
| CN116302019B (en) * | 2023-05-11 | 2023-08-04 | 江苏大秦新能源科技有限公司 | BootLoader program self-updating method, system and storage medium |
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