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CAN (Controller Area Network) bus-based online debugging method of vehicle control unit

A vehicle controller, CAN bus technology, applied in electrical testing/monitoring and other directions, can solve problems such as direct connection for debugging, save space and cost, reduce the difficulty of hardware design, and reduce the difficulty of spatial arrangement of various components. small effect

Active Publication Date: 2011-11-23
CHONGQING CHANGAN AUTOMOBILE CO LTD +1
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the difficulty that the controller cannot be debugged through BDM direct connection, and proposes a method using the CAN bus in the vehicle environment to debug the hybrid vehicle controller with the help of CAN signal sending and receiving tools such as CANalyzer Methods

Method used

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  • CAN (Controller Area Network) bus-based online debugging method of vehicle control unit
  • CAN (Controller Area Network) bus-based online debugging method of vehicle control unit
  • CAN (Controller Area Network) bus-based online debugging method of vehicle control unit

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Embodiment Construction

[0028] The workflow of the vehicle controller debugging method based on CAN bus is as follows: figure 1 shown. When the debugger needs to debug the vehicle, the CAN signal sending and receiving tool is connected to the CAN network of the vehicle with CANalyzer or PCAN, and the debugger sends a request message to the vehicle controller according to the debugging needs, and the vehicle controller first judges the message after receiving the request message Whether to request to read the data message or to request to write the data message is then executed according to the judgment result.

[0029] (1) When the debugger sends a request to read the message to the vehicle controller for debugging, the vehicle controller will read the data in the memory for debugging needs. The process is as follows:

[0030] 1. The vehicle controller confirms that it requests to read data information

[0031] 2. Read the data corresponding to the corresponding address in the memory according to t...

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Abstract

The invention relates to a method for debugging a vehicle control unit on the basis of a vehicle CAN (Controller Area Network) bus. A functional module capable of reading and modifying data through the CAN bus is added to the vehicle control unit software. When the vehicle control unit needs debugging, a CAN bus port on the vehicle control unit can be connected directly, a CAN signal receiving and transmitting tool such as CANalyzer or PCAN running on a computer can be used for transmitting and receiving data so as to read and write internal data of the control unit, thus the purpose of debugging the vehicle control unit is achieved.

Description

technical field [0001] The invention relates to a CAN protocol-based debugging method for reading and modifying internal data of a hybrid vehicle controller. Background technique [0002] With the development of energy technology and automobile technology, hybrid electric vehicles have attracted more and more attention, and their control technology has become more and more advanced and complex. In the development process of the controller, the role of online debugging is becoming more and more important. Generally, it needs to be directly connected to the computer through the BDM interface of the controller during online debugging. However, due to the limitation of the cost of the controller and the location of the controller during online debugging, it is difficult to use BDM for debugging. It is difficult to simulate the vehicle environment for debugging. Therefore, it is necessary to design a method for online debugging of the controller in the vehicle environment throu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B23/02
Inventor 严钦山邓柯军李宗华苏岭
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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