Method for modifying calibration data in vehicle-mounted controller on line remotely

A vehicle-mounted controller and calibration data technology, applied in electrical testing/monitoring, etc., can solve problems such as data modification errors, data modification failures, and slow erasing and writing speeds

Inactive Publication Date: 2013-02-20
BEIHANG UNIV
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Problems solved by technology

[0002] In the development process of the on-board controller, the traditional online calibration process uses a rewritable read-only memory ROM, which generally participates in EPOM or EEPROM that can be read and written bit by bit. This method does not need to make changes to the program during the linking process. Any processing, but in the actual online calibration process, the erasing and writing speed of the memory is very slow. In the case of a high real-time response of the control system, the slower erasing and writing speed may cause data modification failure or data modification errors. Occurs, affecting the stability of online calibration, so when using this method, it is necessary to stop the program to perform erasing, and there will be a certain probability of errors in the erasing process, which requires strict verification, and the data security of the entire calibration process must be guaranteed. less than effective protection

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  • Method for modifying calibration data in vehicle-mounted controller on line remotely

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Embodiment Construction

[0014] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0015] The present invention is a method for modifying the calibration data in the on-board controller remotely online. The method flow is as follows: figure 1 shown, including the following steps:

[0016] Step 1 (preparation stage): The program linker transfers the calibration data in the controller FLASH and the execution address in the program to the controller RAM.

[0017] Calibration data is generally a one-dimensional or two-dimensional array, which is declared in the read-only area of ​​the program, that is, in the FLASH of the on-board controller. After the program code compilation process is completed, the program linker will use the control instructions to transfer the data that needs to be calibrated in the program. The execution address is transferred to the controller RAM, that is, the corresponding calibration data is copied from the ...

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Abstract

The invention discloses a method for modifying calibration data in a vehicle-mounted controller on line remotely. The method comprises that firstly, an assembly linker transfers an execution address of the calibration data in FLASH of the controller in a program to a random-access memory (RAM) of the controller; and secondly, and the calibration data in the vehicle-mounted controller is modified through a personal computer (PC) client and the calibration is completed. According to the method, a whole on-line calibration process is achieved in the vehicle-mounted controller, the calibration data can be located in the RAM, the maximum read-write speed can be reached, the modification time of the calibration data is reduced greatly, and the calibration cost is saved, and the read-write speed requirement of automation calibration can be met; and the calibration data in the vehicle-mounted controller are imaged in the PC client, when unpredictable emergences of the controller occur, the calibration data can not be lost.

Description

technical field [0001] The invention relates to a method for modifying calibration data in a vehicle-mounted controller online and remotely, and belongs to the technical field of the vehicle-mounted controller. Background technique [0002] In the development process of the on-board controller, the traditional online calibration process uses a rewritable read-only memory ROM, which generally participates in EPOM or EEPROM that can be read and written bit by bit. This method does not need to make changes to the program during the linking process. Any processing, but in the actual online calibration process, the erasing and writing speed of the memory is very slow. In the case of a high real-time response of the control system, the slower erasing and writing speed may cause data modification failure or data modification errors. Occurs, affecting the stability of online calibration, so when using this method, it is necessary to stop the program to perform erasing, and there wil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B23/02
Inventor 杨世春李明宋维群曹耀光靳胜付雷强
Owner BEIHANG UNIV
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