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CAN bus controller test method

A CAN bus and controller testing technology, applied in the direction of program control, computer control, general control system, etc., can solve the problems of inability to traverse resource modules and various processing mechanisms, and difficult testing, so as to achieve universality, avoid calculation, To achieve the effect of synchronization

Active Publication Date: 2020-03-31
BEIJING ZHENXING METROLOGY & TEST INST
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  • Abstract
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Problems solved by technology

[0005] CAN bus controller is a controller device with powerful functions and numerous internal registers. Its testing has always been a difficult problem in the industry. Even if some institutions can complete the simple function test of sending and receiving messages, they cannot traverse the numerous resource modules and various internal registers. processing mechanism

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Embodiment Construction

[0077] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and together with the embodiments of the present invention are used to explain the principle of the present invention and are not intended to limit the scope of the present invention.

[0078] The CAN bus communication protocol is a bus protocol based on the response mechanism. The status of each node in the bus system is equal, and there is no master-slave distinction. When the bus is idle, each node can send data. When a node seizes the bus as a transmitter, all other nodes automatically become receivers, and each node in the system can receive the data message sent by the sending station; when there are multiple When two nodes try to send at the same time, the priority of their data frames determines which node has higher priority. The node with a higher priority data fram...

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Abstract

The invention relates to a CAN (Controller Area Network) bus controller test method, belongs to the technical field of electronic component detection, and solves the problem of lack of comprehensive CAN bus controller test in the prior art. The method comprises the following steps: obtaining a current test mode and entering a corresponding working mode, wherein the current test mode is a message sending test mode, a message receiving test mode, a sleep test mode, a filtering test mode and an arbitration failure test mode; and constructing a CAN bus environment corresponding to the working modethrough an RX end of the CAN bus controller, and testing the CAN bus controller in the corresponding working mode in the CAN bus environment corresponding to the working mode. According to the method, the RX end of the CAN bus controller is fully utilized to create a CAN real working environment for the chip so as to complete testing of corresponding functions of the chip.

Description

technical field [0001] The invention relates to the technical field of detection of electronic components, in particular to a method for testing a CAN bus controller. Background technique [0002] With the rapid development of computer hardware, software and integrated circuit technology, the fields of consumer electronics, embedded motherboards, automobiles and industrial applications have developed rapidly, and the requirements for high-speed, high-reliability and low-cost communication media in the field of industrial control are also increasing. The improvement. Fieldbus technology emerges as the times require. Fieldbus is one of the hotspots in the development of automation technology today. It provides strong technical support for distributed control systems to realize real-time and reliable data communication between nodes. In the field of embedded hardware system transmission, long-established communication standards, although widely used, cannot be used in complex ...

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Application Information

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IPC IPC(8): G05B19/042
CPCG05B19/0423G05B2219/24036
Inventor 杨超马成英张金凤孟庆伟唐金慧谢向桅刘玏
Owner BEIJING ZHENXING METROLOGY & TEST INST
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