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

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...

AI Technical Summary

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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