CN112860301A - Method for using bootloader interrupt function by app and single chip microcomputer - Google Patents
Method for using bootloader interrupt function by app and single chip microcomputer Download PDFInfo
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- CN112860301A CN112860301A CN202110034794.3A CN202110034794A CN112860301A CN 112860301 A CN112860301 A CN 112860301A CN 202110034794 A CN202110034794 A CN 202110034794A CN 112860301 A CN112860301 A CN 112860301A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F8/00—Arrangements for software engineering
- G06F8/60—Software deployment
- G06F8/65—Updates
- G06F8/656—Updates while running
Abstract
The invention relates to a method for using a bootloader interrupt function by an app and a singlechip, wherein the method comprises the following steps: when the upgrading process enters a bootloader program, setting g _ vector _ offset to be 0 at the initial position of a main function of the bootloader program; when the upgrading process enters the app program, setting g _ vector _ offset as an offset value of the app program at the starting position of a main function of the app program; adding a judgment condition whether g _ vector _ offset >0 is satisfied or not at the initial position of an interrupt function of the Bootloader program, and if so, directly jumping to the interrupt function of the corresponding app program for execution until the interrupt function of the app program is executed and then exiting the interrupt function of the Bootloader program; if not, the subsequent part of the interrupt function of the bootloader program is executed. The invention can enter bootloader program as long as the storage space of the singlechip is enough, thus realizing on-line upgrade.
Description
Technical Field
The invention relates to the technical field of single-chip microcomputers, in particular to a method for using a bootloader interrupt function by an app and a single-chip microcomputer.
Background
The single chip microcomputer is widely applied to the field of household appliances or control. The single chip microcomputer is frequently required to be subjected to program online upgrading, and bootloader programs and app programs are required to be involved in online upgrading. However, many low-end scm do not support the remapping of the interrupt function table, such as 51, PIC, AVR, etc., and even the new tang NUC100 series of core-m 0 core scm and STM core-m 0 core scm do not support them. The remapping which does not support the interrupt function table cannot enter the bootloader program, and cannot enter the on-line upgrading of the single chip microcomputer.
Disclosure of Invention
In order to solve the above problems, the invention provides a method for using a bootloader interrupt function by an app and a single chip microcomputer.
The specific scheme is as follows:
a method for an app to use a bootloader interruption function, comprising:
when the upgrading process enters a bootloader program, setting g _ vector _ offset to be 0 at the initial position of a main function of the bootloader program; when the upgrading process enters the app program, setting g _ vector _ offset as an offset value of the app program at the starting position of a main function of the app program;
adding a judgment condition whether g _ vector _ offset >0 is satisfied or not at the initial position of an interrupt function of the Bootloader program, and if so, directly jumping to the interrupt function of the corresponding app program for execution until the interrupt function of the app program is executed and then exiting the interrupt function of the Bootloader program; if not, the subsequent part of the interrupt function of the bootloader program is executed.
Furthermore, the interrupt function tables of the app program and the bootloader program are stored in the initial position of the program memory.
Further, a parameter g _ vector _ offset for representing an offset value of the app program is stored at a start position of the data memory.
Further, the parameter g _ vector _ offset takes 4 bytes.
A single chip microcomputer with an app using a bootloader interrupt function comprises a processor, a memory and a computer program which is stored in the memory and can run on the processor, wherein the processor executes the computer program to realize the steps of the method of the embodiment of the invention.
By adopting the technical scheme, as long as the storage space of the singlechip is enough, the bootloader program can be entered, and online upgrade is realized.
Drawings
Fig. 1 is a flowchart illustrating a first embodiment of the present invention.
Detailed Description
To further illustrate the various embodiments, the invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures.
The invention will now be further described with reference to the accompanying drawings and detailed description.
The first embodiment is as follows:
an embodiment of the present invention provides a method for using a bootloader interrupt function by an app, as shown in fig. 1, where the method includes the following steps:
s1: and storing the interrupt function tables of the app program and the bootloader program in the initial position of the program memory.
The program memory in this embodiment is a hard disk.
S2: a parameter g vector OFFSET representing the OFFSET value of the APP program is stored at the start position of the data memory, making the OFFSET value of the APP program APP _ OFFSET.
The data storage in this embodiment is a memory. The parameter g vector offset takes 4 bytes.
S3: when the upgrading process enters a bootloader program, setting g _ vector _ offset to be 0 at the initial position of a main function of the bootloader program; when the upgrade process enters the APP program, g _ vector _ OFFSET is set to APP _ OFFSET at the start position of the main function of the APP program.
S4: adding a judgment condition whether g _ vector _ offset >0 is satisfied or not at the initial position of an interrupt function of the Bootloader program, and if so, directly jumping to the interrupt function of the corresponding app program for execution until the interrupt function of the app program is executed and then exiting the interrupt function of the Bootloader program; if not, the subsequent part of the interrupt function of the bootloader program is executed.
And (4) normally writing an interrupt function of the App program.
By the method, as long as the storage space of the single chip microcomputer is enough, bootloader programs can be accessed, and online upgrading is achieved.
Example two:
the present invention further provides a single chip microcomputer with a bootloader interrupt function used by an app, and the single chip microcomputer includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the processor implements the steps in the foregoing method embodiments of the first embodiment of the present invention when executing the computer program.
The Memory includes a program Memory (e.g., a hard disk) and a data Memory (e.g., a Memory, which is a Random Access Memory (RAM)). In this embodiment, a computer program is stored in a program memory, and the processor implements various functions of the single chip microcomputer of the app using the bootloader interrupt function by running or executing the computer program stored in the program memory.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. A method for an app to use a bootloader interrupt function, comprising:
when the upgrading process enters a bootloader program, setting g _ vector _ offset to be 0 at the initial position of a main function of the bootloader program; when the upgrading process enters the app program, setting g _ vector _ offset as an offset value of the app program at the starting position of a main function of the app program;
adding a judgment condition whether g _ vector _ offset >0 is satisfied or not at the initial position of an interrupt function of the Bootloader program, and if so, directly jumping to the interrupt function of the corresponding app program for execution until the interrupt function of the app program is executed and then exiting the interrupt function of the Bootloader program; if not, the subsequent part of the interrupt function of the bootloader program is executed.
2. The method for the app to use the bootloader interrupt function according to claim 1, wherein: the interrupt function tables of the app program and the bootloader program are both stored in the initial position of the program memory.
3. The method for the app to use the bootloader interrupt function according to claim 1, wherein: a parameter g vector offset representing the offset value of the app program is stored at the start position of the data memory.
4. The method for the app to use the bootloader interrupt function according to claim 1, wherein: the parameter g vector offset takes 4 bytes.
5. The utility model provides a singlechip that app used bootloader interrupt function which characterized in that: comprising a processor, a memory and a computer program stored in the memory and running on the processor, the processor implementing the steps of the method according to any of claims 1 to 4 when executing the computer program.
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| CN202110034794.3A CN112860301B (en) | 2021-01-12 | 2021-01-12 | Method for using bootloader interrupt function by app and single chip microcomputer |
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| CN112860301B CN112860301B (en) | 2022-08-16 |
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