KR20220085143A - Apparatus for updating program and method thereof - Google Patents

Abstract

The present invention relates to a program update device, comprising: an update image receiving unit for receiving a new image of a program to be updated; a memory unit in which a partition A as an operating partition and a partition B as a reserved partition are set; and storing the XOR operation result image, which is a result of XORing the New image and the OLD image stored in the partition A, in the partition B, and then using the XOR operation result image stored in the partition B and a control unit that updates the OLD image stored in partition A.

Description

Apparatus and method for updating programs

The present invention relates to a program update apparatus and method, and more particularly, to a program update apparatus capable of rapidly performing update when a program stored in a memory is updated in an active state in a non-MMU (Memory Management Unit) method. and methods.

In general, a vehicle includes a plurality of electronic control units (ECUs). A driving program (eg, firmware) is required to drive the electronic control unit (ECU), and the driving program is stored in a memory.

The memory includes a flash memory as a non-volatile memory.

On the other hand, the driving program stored in the memory is periodically or aperiodically program updated in order to improve an error or improve a function.

At this time, there are two methods for updating the program stored in the memory, the MMU (Memory Management Unit) method and the non-MMU method. It is a possible method, but it is not a universally used method because the hardware unit cost is higher than that of the non-MMU method.

Next, since the non-MMU method does not have a hardware memory address switching unit, a plurality of update images (binary-type update programs) corresponding to two directly prepared memory partition address areas are created in advance, and then when the program is updated, the current active ) obtains information on the memory partition area, downloads and stores an update image mapped to the non-active partition area among the two previously created images, and then updates the active partition start address in the flash bootloader (FBL). This is a method of setting the partition area where the image is stored (in this case, the existing active partition area becomes a non-active partition area thereafter).

However, since the non-MMU method has to generate a plurality of update images (binary-type update programs) performing the same function in advance, there is a problem in that the time and cost required for developing and verifying individual update images is doubled.

In addition, in order to perform the program update in the non-MMU method, an erase operation must be performed on the corresponding partition area. Due to the characteristics of the flash memory, erase and write operations are different from read operations. Since it takes a significant amount of time, there is a problem in that it is difficult to perform the program update in the active state of the electronic control unit (ECU). Therefore, it is necessary to minimize erase and write operations on the memory partition as much as possible.

In addition, the existing non-MMU method has a problem in that it is difficult to rollback (return to the old version program) after updating to the update program of the new version.

Therefore, when the program stored in the memory in the non-MMU method is updated in an active state, it enables the development and download of a single image, and also enables the update to be performed quickly by not performing the erase operation, In addition, there is a need for a program update method that can perform rollback quickly and easily.

Background art of the present invention is disclosed in Korean Patent Application Laid-Open No. 10-2015-0064654 (published on June 11, 2015, firmware update method and electronic device thereof).

According to one aspect of the present invention, the present invention was created to solve the above problems, and when a program stored in a memory in a non-MMU (Memory Management Unit) method is updated in an active state, it is erased. It is an object of the present invention to provide an apparatus and method for updating a program, which allows to perform an update quickly while not performing an operation.

According to an aspect of the present invention, there is provided a program update apparatus, comprising: an update image receiving unit for receiving a new image of a program to be updated; a memory unit in which a partition A as an operating partition and a partition B as a reserved partition are set; and storing the XOR operation result image, which is a result of XORing the New image and the OLD image stored in the partition A, in the partition B, and then using the XOR operation result image stored in the partition B and a controller for updating the OLD image stored in partition A.

In the present invention, the New image means an update program in binary format, and the OLD image means an existing program in binary format.

In the present invention, the updated image receiving unit is characterized in that the real-time download of the new image in the form of streaming.

In the present invention, the control unit performs XOR operation on the XOR operation result image stored in partition B and the OLD image stored in partition A, and transfers the XOR operation result New image to partition A where the OLD image is stored. It is characterized in that the program update is performed by the method of saving.

In the present invention, the controller erases the OLD image on a sector-by-sector basis for the partition A and writes the new image in order to store the new image, which is the result of the XOR operation, in the partition A where the OLD image is stored. It is characterized by writing.

In the present invention, when the program update is completed by the control unit, the new image is stored in the partition A of the memory unit, and the image as a result of XOR operation of the new image and the OLD image is stored in the partition B. do.

In the present invention, when performing a program rollback, the control unit performs an XOR operation on the New image of the partition A and the XOR operation result image of the partition B, and stores the XOR operation result in the partition A. characterized by performing

In the present invention, when the program rollback is completed by the control unit, the OLD image is stored in the partition A of the memory unit, and the image as a result of XOR operation of the New image and the OLD image is stored in the partition B. do.

A program update method according to another aspect of the present invention comprises the steps of: receiving, by an update image receiving unit, a New image for program update; performing an exclusive OR (XOR) operation on the new image and the OLD image stored in partition A of the memory unit; storing, by the controller, an XOR operation result image according to the XOR operation in the partition B of the memory unit; and updating, by the controller, the OLD image stored in the partition A using the XOR operation result image stored in the partition B.

In the present invention, the New image means an update program in binary format, and the OLD image means an existing program in binary format.

In the present invention, in the step of receiving the new image for the program update, the update image receiving unit is characterized in that the new image is downloaded in real time in a streaming form.

In the present invention, in the step of updating the OLD image stored in the partition A, the controller performs an XOR operation on the XOR operation result image stored in the partition B and the OLD image stored in the partition A, and the XOR operation result is It is characterized in that the program update is performed in such a way that the new image is stored in the partition A where the OLD image is stored.

In the present invention, in order to store the new image, which is the result of the XOR operation, in the partition A in which the OLD image is stored, the controller erases the OLD image in a sector-by-sector unit for partition A and writes the new image. It is characterized by writing.

In the present invention, when the program update is completed by the control unit, a new image is stored in partition A of the memory unit, and an image resulting from XOR operation of the new image and the OLD image is stored in partition B do it with

In the present invention, when a program rollback is to be performed after the program update, the control unit XORs the New image of the partition A and the XOR operation result image of the partition B, and stores the XOR operation result in the partition A It is characterized by performing a rollback in a way of saving.

In the present invention, when the program rollback is completed by the control unit, the OLD image is stored in the partition A of the memory unit, and the image as a result of XOR operation of the New image and the OLD image is stored in the partition B do it with

According to one aspect of the present invention, the present invention enables the development and download of a single image when a program stored in a memory is updated in an active state in a non-MMU manner, and also erases a memory partition and By minimizing the write operation, the program can be updated quickly and rollback can be performed quickly and easily.

1 is an exemplary diagram showing a schematic configuration of a program update apparatus according to an embodiment of the present invention;
2 is a flowchart illustrating a program update method according to an embodiment of the present invention;
3 is an exemplary diagram for explaining a program update method in FIG. 2 .
4 is a flowchart illustrating a program rollback method according to an embodiment of the present invention.
FIG. 5 is an exemplary diagram for explaining a program rollback method in FIG. 4 .

Hereinafter, an embodiment of a program update apparatus and method according to the present invention will be described with reference to the accompanying drawings.

In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of the user or operator. Therefore, definitions of these terms should be made based on the content throughout this specification.

1 is an exemplary diagram showing a schematic configuration of a program update apparatus according to an embodiment of the present invention.

As shown in FIG. 1 , the program update apparatus according to the present embodiment includes an update image receiving unit 110 , a control unit 120 , and a memory unit 130 .

The update image receiving unit 110 downloads a new image (ie, a binary update program) to update a program from a designated device (eg, a server, a mobile terminal, etc.).

The downloaded New image (ie, binary update program) may be stored in a designated buffer unit (not shown) and then downloaded, or may be downloaded in real time in a streaming manner.

The control unit 120 (eg, ECU, MCU, etc.) converts the downloaded New image (ie, update program in binary format) to a partition (eg, partition A) of the memory unit 130 that is currently in an active (operational) state. Update the program (ie, OLD program or OLD image) previously stored in the .

In this case, a method for the controller 120 to update a program (ie, an OLD program or an OLD image) stored in the partition (eg, partition A) will be described with reference to FIGS. 2 and 3 .

2 is a flowchart illustrating a program update method according to an embodiment of the present invention, and FIG. 3 is an exemplary diagram illustrating the program update method in FIG. 2 .

Referring to FIG. 2 , when performing a program update (YES in S101), the controller 120 receives a new image (ie, a binary update program) (S102).

In this case, the new image (ie, binary update program) may be downloaded in advance or downloaded in real time (in streaming format).

The control unit 120 controls the New image (ie, a new image that is an update program in binary format) and an existing program (ie, binary format) stored in a designated area (eg, partition A) of the memory unit 130 . OLD image), an exclusive OR (XOR) operation is performed (S103).

Here, the XOR operation has characteristics such as "A XOR B = C", "A XOR C = B", and "B XOR C = A". That is, assuming that the New image (ie, update program) is A, the OLD image (ie, the existing program) is B, and the XOR operation result value (XOR operation result image) is C, the New image When (A) and the OLD image (B) are XORed, an XOR operation result image (C) is calculated, and when the New image (A) and the XOR operation result image (C) are XORed, the OLD image (B) is calculated (that is, a result corresponding to a program rollback is calculated), and when the OLD image (B) and the XOR operation result image (C) are XORed, the New image (A) is calculated (ie, in program update) There is a characteristic that produces a corresponding result).

According to the characteristics of the XOR operation as described above, the controller 120 performs an XOR operation on the New image (A) and the OLD image (B) (refer to ① of FIG. 3 (a)) and the XOR operation result image (C) is stored in a designated area (eg, partition B, reserved area) of the memory unit 130 (S104) (refer to ② of FIG. 3 (a)).

In addition, according to the characteristics of the exclusive OR (XOR) operation as described above, the control unit 120 stores the XOR operation result image C stored in the designated area (eg, partition B) and the designated area (eg, partition A). The stored OLD image (B) is XORed (S105) (refer to ① in FIG. 3(b)).

And the control unit 120 is the XOR operation result (that is, the XOR operation result image (C) stored in the partition B and the OLD image (B) stored in the partition A New image (A) that is a result of XOR operation )) in a designated area (eg, partition A) where the OLD image B was stored (that is, updated by erasing and writing in units of sectors) (S106) (FIG. 3). See ② in (b)).

Accordingly, when the program update is completed, the new image (A) is stored in the partition A of the memory unit 130 and the new image (A) and the OLD image (B) are XORed in the partition B of the memory unit 130 . An image C as a result of the operation is stored (refer to (c) of FIG. 3 ).

On the other hand, after the update is performed to the new image (A) of the new version as described above, there may be a situation in which an error occurs and it is necessary to roll back (revert to the old image of the old version).

In this case, conventionally, memory SWAP (that is, when updating a program, the new image downloaded and stored in partition B is moved to partition A and stored, and the OLD image stored in partition A is moved and stored in partition B, and when rollback, the new image is stored. It is possible to perform rollback by moving and saving the OLD image to partition B, and then moving and saving the OLD image to partition A), but it is necessary to repeatedly erase and write to both partition A and partition B. Therefore, there was a problem that it takes a lot of time to update the program as well as to roll back the program.

On the other hand, in this embodiment, erase and write are performed only for one designated area (eg, partition A) to be updated or rolled back during program update and program rollback. There is an advantage in that the time required can be shortened.

4 is a flowchart illustrating a program rollback method according to an embodiment of the present invention, and FIG. 5 is an exemplary diagram illustrating the program rollback method in FIG. 4 .

Referring to FIG. 4 , a new image (A) is stored in partition A of the memory unit 130, and an XOR operation value (ie, the new image (A) and the OLD image (B) is XORed in partition B). In a state in which the result image C) is stored (refer to (a) of FIG. 5), when a program rollback is performed (Yes of S201), the control unit 120 is stored in the partition A of the memory unit 130. The stored New image (ie, binary update program) is fetched (S202).

In addition, the control unit 120 retrieves the XOR operation value stored in the partition B of the memory unit 130 (that is, the image (C) as a result of XOR operation on the New image (A) and the OLD image (B)) ( S203).

In addition, the control unit 120 controls the new image A fetched from a specified area (eg, partition A) of the memory unit 130 and a new image fetched from another specified area (eg, partition B) of the memory unit 130 (eg, partition B). XOR operation result image C is XORed (S204) (refer to ① of FIG. 5(b)) and stored in a designated area (eg, partition A) of the memory unit 130 (ie, erased in units of sectors) (rollback through erase and write) (S205) (refer to ② of FIG. 5(b)).

Accordingly, when the rollback is completed, the existing OLD image (B) is stored again in the partition A of the memory unit 130 , and the XOR operation value (that is, the new image (A) ) and the OLD image (B), the result image (C)) is stored as it is (refer to (c) of FIG. 5).

As described above, the present embodiment has the effect of reducing the rollback time by half or less compared to the conventional one, since erase and write of the target area (eg, partition A) is performed only once even during program rollback.

As described above, this embodiment enables the development and download of a single image when the program stored in the memory is updated in an active state in a non-MMU manner, and also erases and writes to the memory partition. By minimizing the operation, the program can be updated quickly and rollback can be performed quickly and easily.

As described above, the present invention has been described with reference to the embodiment shown in the drawings, but this is merely exemplary, and various modifications and equivalent other embodiments are possible therefrom by those skilled in the art to which the art pertains. will understand the point. Therefore, the technical protection scope of the present invention should be defined by the following claims. Implementations described herein may also be implemented as, for example, a method or process, an apparatus, a software program, a data stream, or a signal. Although discussed only in the context of a single form of implementation (eg, discussed only as a method), implementations of the discussed features may also be implemented in other forms (eg, as an apparatus or program). The apparatus may be implemented in suitable hardware, software and firmware, and the like. A method may be implemented in an apparatus such as, for example, a processor, which generally refers to a computer, a microprocessor, a processing device, including an integrated circuit or programmable logic device, and the like. Processors also include communication devices such as computers, cell phones, portable/personal digital assistants (“PDA”) and other devices that facilitate communication of information between end-users.

110: update image receiving unit
120: control unit
130: memory unit

Claims (16)

an update image receiving unit for receiving a new image of a program to be updated;
a memory unit in which a partition A as an operating partition and a partition B as a reserved partition are set; and
After storing the XOR operation result image, which is a result of XORing the New image and the OLD image stored in the partition A, in the partition B, the partition using the XOR operation result image stored in the partition B A program update device comprising a; a control unit for updating the OLD image stored in A.
The method of claim 1,
The new image means an update program in binary form,
The OLD image is a program update device, characterized in that it means an existing program in a binary form.
The method of claim 1, wherein the update image receiving unit,
A program update device, characterized in that the new image is downloaded in real time in a streaming form.
According to claim 1, wherein the control unit,
It performs program update by performing XOR operation on the XOR operation result image stored in partition B and the OLD image stored in partition A, and storing the new image resulting from the XOR operation in partition A where the OLD image is stored. A program update device, characterized in that.
According to claim 4, wherein the control unit,
In order to store the new image, which is the result of the XOR operation, in partition A where the OLD image is stored,
A program update device, characterized in that for partition A, erasing the OLD image in units of sectors and writing the new image.
The method of claim 1, wherein when the program update is completed by the control unit,
A new image is stored in partition A of the memory unit,
The program update device, characterized in that the partition B stores the image as a result of XORing the New image and the OLD image.
The method of claim 6, wherein the control unit,
When performing a program rollback,
and performing rollback by performing an XOR operation on the new image of the partition A and the XOR operation result image of the partition B, and storing the XOR operation result in the partition A.
The method of claim 7, wherein when the program rollback is completed by the control unit,
An OLD image is stored in partition A of the memory unit,
The program update device, characterized in that the partition B stores the image as a result of XORing the New image and the OLD image.
receiving, by an update image receiving unit, a new image for program update;
an exclusive OR operation (XOR) operation of the new image and the OLD image stored in partition A of the memory unit;
storing, by the controller, an XOR operation result image according to the XOR operation in the partition B of the memory unit; and
and updating, by the controller, the OLD image stored in the partition A using the XOR operation result image stored in the partition B.
10. The method of claim 9,
The new image means an update program in binary form,
The OLD image is a program update method, characterized in that it means an existing program in a binary form.
The method of claim 9, wherein in the step of receiving a New image for the program update,
The update image receiving unit,
A program update method, characterized in that the new image is downloaded in real time in a streaming form.
10. The method of claim 9,
In the step of updating the OLD image stored in the partition A,
The control unit is
It performs program update by performing XOR operation on the XOR operation result image stored in partition B and the OLD image stored in partition A, and storing this XOR operation result, a new image, in partition A where the OLD image is stored. A program update method, characterized in that.
The method of claim 12, wherein in order to store the New image, which is the result of the XOR operation, in the partition A where the OLD image is stored,
The control unit is
A program update method, characterized in that for partition A, erasing the OLD image in units of sectors and writing the new image.
The method of claim 9, wherein when the program update is completed by the control unit,
A new image is stored in partition A of the memory unit,
A program update method, characterized in that the partition B stores an image as a result of XORing the New image and the OLD image.
15. The method of claim 14,
If you want to perform a program rollback after the above program update,
The control unit is
and performing rollback by performing an XOR operation on the new image of the partition A and the XOR operation result image of the partition B, and storing the XOR operation result in the partition A.
The method of claim 15, wherein when the program rollback is completed by the control unit,
An OLD image is stored in partition A of the memory unit,
A program update method, characterized in that the partition B stores an image as a result of XORing the New image and the OLD image.

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