CN112631825A - Production line diagnosis function implementation method of embedded equipment - Google Patents
Production line diagnosis function implementation method of embedded equipment Download PDFInfo
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- CN112631825A CN112631825A CN202011619296.7A CN202011619296A CN112631825A CN 112631825 A CN112631825 A CN 112631825A CN 202011619296 A CN202011619296 A CN 202011619296A CN 112631825 A CN112631825 A CN 112631825A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
- G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
- G06F11/1004—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's to protect a block of data words, e.g. CRC or checksum
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/36—Preventing errors by testing or debugging software
- G06F11/362—Software debugging
- G06F11/366—Software debugging using diagnostics
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Abstract
The invention discloses a method for realizing the production line diagnosis function of embedded equipment, which downloads a production line program for realizing the diagnosis function into an RAM of a corresponding chip of the embedded equipment and runs the production line program to finish the diagnosis function. The invention has the advantages that: and the production line program for the diagnosis function is downloaded to the RAM to run, so that the production line program is automatically erased after the diagnosis and detection are finished, and the storage space of the chip is not occupied.
Description
Technical Field
The invention relates to the field of production detection of embedded equipment, in particular to a method for realizing a production line diagnosis function of the embedded equipment.
Background
In the production of embedded equipment, various tests are required on a production line to ensure that components work normally or some differentiated data are calibrated, and the traditional implementation method mainly considers the requirements of the production line in the implementation process in the software development process. The PCB manufacturer records the software which realizes the production line test function into the chip, then conveys the chip to an assembly factory, sends an instruction by production line equipment, and operates the diagnosis function to achieve the aim. According to the method, after the project is produced in a large scale, the part of functions can be continuously kept in the chip and exist together with the conventional functions, firstly, the production line diagnosis function can occupy a storage space ROM, secondly, for equipment with the function safety certification requirement, the CRC of software is inconsistent due to the updating of the production line diagnosis function, the work can be carried out again for safety certification, and the defects of the two methods cause that the implementation method of the diagnosis function in the prior art cannot well meet the requirement of production iteration updating.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for realizing the production line diagnosis function of an embedded device, wherein the diagnosis function software of the method is not stored in a ROM after testing.
In order to achieve the purpose, the invention adopts the technical scheme that: a production line diagnosis function realization method of an embedded device downloads a production line program for realizing the diagnosis function into a RAM of a corresponding chip of the embedded device and operates the production line program to finish the diagnosis function.
And downloading the production line program into the RAM through the bootstrap program to run.
On an assembly line of the embedded equipment, the production line equipment sends a corresponding diagnosis instruction to the chip through the CAN bus, triggers a corresponding diagnosis function, downloads and runs a production line program, and completes the detection of the function and the calibration of data by matching with the operation of the production line.
The production line program in the RAM is downloaded to the RAM when the power is on, and the production line program is erased when the power of the chip is off.
And downloading program software required by the chip to realize the work except the production line program in the ROM of the chip.
The invention has the advantages that: the production line program for the diagnosis function is downloaded to the RAM to run, so that the production line program is automatically erased after the diagnosis and detection are finished, the storage space of the chip is not occupied, the application software of the chip is not changed, the defect and cost that the application software of the chip needs to be repeatedly authenticated are reduced, the cost is reduced, and the realization is convenient and reliable.
Drawings
The contents of the expressions in the various figures of the present specification and the labels in the figures are briefly described as follows:
FIG. 1 is a schematic diagram of ROM and RAM of an embedded device chip;
FIG. 2 is a diagram illustrating the RAM and ROM detection functions of an embedded device chip according to the prior art;
FIG. 3 is a schematic diagram of the product line software program of the present invention.
Detailed Description
The following description of preferred embodiments of the invention will be made in further detail with reference to the accompanying drawings.
As shown in fig. 3, a method for implementing a production line diagnostic function of an embedded device downloads a production line program for implementing the diagnostic function into a RAM of a corresponding chip of the embedded device and runs the production line program to complete the diagnostic function, where the downloading method is as follows: downloading a production line program into an RAM for operation through a bootstrap program; before downloading, the chip is in a power-on state, and a production line program is downloaded into the chip of the embedded equipment; on an assembly line of the embedded equipment, the production line equipment sends a corresponding diagnosis instruction to the chip through the CAN bus, triggers a corresponding diagnosis function, runs a production line program, and completes the detection of the function and the calibration of data by matching with the production line operation.
The production line program of the chip in the RAM is downloaded to the RAM when the chip is powered on, and the production line program can be erased when the chip is powered off. Because the RAM is generally erased in a power-off mode, programs cannot be stored, the diagnostic detection programs in the detection production line are deleted after running, the storage of the chip cannot be occupied, application programs corresponding to the normal functions of the chip cannot be changed, and therefore function safety authentication cannot be conducted every time slowly. And downloading program software required by the chip to realize the work except the production line program in the ROM of the chip. The ROM stores the application software and embedded program software of the chip, and the diagnosis program runs in the RAM, so that the separation of the normal function and the diagnosis function of the chip is ensured.
As shown in fig. 1 and 2, the chip includes a RAM and a ROM, and a conventional implementation method brings another significant problem that the function security is for the authentication of software, and needs the CRC check of the software and is embodied in a certificate. If the production line diagnostic function needs to be expanded on the certified software, the software needs to be re-certified, which brings huge certification cost and occupies the ROM memory.
In the application, the functions required by the production line are separated from the conventional functions, and the functions required by the production line are realized in the independent software, so that the software after mass production only comprises the conventional functions, the use of ROM is saved, the feasibility of the function expansion of the production line is further improved, and the possible authentication cost is saved.
As shown in fig. 1, a chip used in an embedded device generally includes an < a > ROM and a < B > RAM, which are used for storing a program and data, respectively, where the program includes various instructions, an instruction execution mechanism obtains instructions to be executed from the ROM and data from the RAM, and the chip operates various peripherals of the chip through a series of processes.
As shown in fig. 2, in the conventional implementation method, <1> embedded software is composed of a <2> bootstrap program and a <3> application program, and the bootstrap program is mainly used to control the software to enter a corresponding working state, update mode, and normal working mode. The line diagnostics function is implemented in the <3> application. The equipment is on the assembly line, and the production line equipment sends a corresponding diagnosis instruction to the equipment through the CAN bus, triggers a corresponding diagnosis function, and is matched with the production line operation to finish the purposes of function detection and data calibration.
In the implementation method, firstly, the diagnosis function of the production line must be included in the application program, and the diagnosis function still remains after mass production, thereby occupying the ROM space. Secondly, the authentication of function security generally aims at the <3> application program, the change of any instruction will cause the change of the CRC result of the secondary part, if the change of the production line diagnosis function causes the need of updating the software of the part, but the conventional function is not changed, in this case, the <3> application program still needs to be authenticated again.
As shown in fig. 3, the production line diagnostic function is separated from the <3> application program, and is implemented independently in the <4> production line program, on the production line, the <2> bootstrap program downloads and runs the part of the program into the RAM, and on the assembly line, the production line equipment sends a corresponding diagnostic instruction to the equipment through the CAN bus, triggers the corresponding diagnostic function, and cooperates with the production line operation to accomplish the purpose of function detection and data calibration. Because of the characteristics of the RAM, the part of the program will not be saved after the power of the equipment is cut off, so the ROM space is not occupied, in addition, even if the function of the production line is changed, because the part of the program is not realized in the <3> application program together with the conventional function, even if the requirement of the function safety and the update of the production line program do not influence the authentication result, the re-authentication is not needed, and the cost is saved.
It is clear that the specific implementation of the invention is not restricted to the above-described embodiments, but that various insubstantial modifications of the inventive process concept and technical solutions are within the scope of protection of the invention.
Claims (5)
1. A production line diagnosis function realization method of embedded equipment is characterized by comprising the following steps: and downloading the production line program for realizing the diagnosis function into the RAM of the corresponding chip of the embedded equipment and operating the production line program to finish the diagnosis function.
2. The method for implementing the production line diagnostic function of the embedded device as claimed in claim 1, wherein: and downloading the production line program into the RAM through the bootstrap program to run.
3. The method for implementing the production line diagnostic function of the embedded device as claimed in claim 1 or 2, wherein: on an assembly line of the embedded equipment, the production line equipment sends a corresponding diagnosis instruction to the chip through the CAN bus, triggers a corresponding diagnosis function, runs a production line program, and completes the detection of the function and the calibration of data by matching with the production line operation.
4. The method for implementing the production line diagnostic function of the embedded device as claimed in claim 1 or 2, wherein: the production line program in the RAM is downloaded to the RAM when the power is on, and the production line program is erased when the power of the chip is off.
5. The method for implementing the production line diagnostic function of the embedded device as claimed in claim 1, wherein: and downloading program software required by the chip to realize the work except the production line program in the ROM of the chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011619296.7A CN112631825A (en) | 2020-12-31 | 2020-12-31 | Production line diagnosis function implementation method of embedded equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011619296.7A CN112631825A (en) | 2020-12-31 | 2020-12-31 | Production line diagnosis function implementation method of embedded equipment |
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| CN112631825A true CN112631825A (en) | 2021-04-09 |
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| CN202011619296.7A Pending CN112631825A (en) | 2020-12-31 | 2020-12-31 | Production line diagnosis function implementation method of embedded equipment |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107728597A (en) * | 2016-08-10 | 2018-02-23 | 大陆汽车电子（连云港）有限公司 | A kind of automotive diagnostic system and method |
| CN107863755A (en) * | 2016-09-21 | 2018-03-30 | 通用电器技术有限公司 | Machine upkeep and diagnostic system and method |
| CN109814531A (en) * | 2019-01-28 | 2019-05-28 | 深圳市元征科技股份有限公司 | A kind of automatic diagnosis method based on cloud platform, system and relevant device |
| CN110389576A (en) * | 2019-07-16 | 2019-10-29 | 青岛海尔科技有限公司 | The execution method of alarm operation, smart machine, storage medium |
-
2020
- 2020-12-31 CN CN202011619296.7A patent/CN112631825A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107728597A (en) * | 2016-08-10 | 2018-02-23 | 大陆汽车电子（连云港）有限公司 | A kind of automotive diagnostic system and method |
| CN107863755A (en) * | 2016-09-21 | 2018-03-30 | 通用电器技术有限公司 | Machine upkeep and diagnostic system and method |
| CN109814531A (en) * | 2019-01-28 | 2019-05-28 | 深圳市元征科技股份有限公司 | A kind of automatic diagnosis method based on cloud platform, system and relevant device |
| CN110389576A (en) * | 2019-07-16 | 2019-10-29 | 青岛海尔科技有限公司 | The execution method of alarm operation, smart machine, storage medium |
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Application publication date: 20210409 |