A configurable method and system for sending and receiving test of can bus protocol

Abstract

The present disclosure provides a configurable CAN bus protocol sending and receiving test method and system. Using the standard data frame defined by the CAN bus protocol, the data length of the request frame or response frame can be arbitrarily set within a certain range. If the request frame or response frame data If the length exceeds the data frame length defined in the protocol, the request frame or response frame data will be split into multiple single frames and sent; if multiple frames are received, the frame operation will be performed according to the frame content, and multiple single frames will be combined into one The complete request frame or response frame is then processed for response. During the test, the user can immediately change the corresponding frame parameters according to the needs; at the same time, the present disclosure directly generates hardware interrupt signals through the FPGA, and carries out frame-building and response frame transmission in the interrupt program. A series of operations, without data upload, effectively shortens the response time, and can ensure that the response time is less than 2 milliseconds.

Description

technical field [0001] The present disclosure relates to the field of CAN bus protocol transceiver testing technology, in particular to a configurable CAN bus protocol transceiver testing method and system. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] CAN (Controller Area Network) belongs to the field bus category and is a serial bus communication network that effectively supports distributed control and real-time control. CAN was proposed by Bosch in Germany in the late 1980s. The initial motivation for the proposal was to realize the communication of modern and large electronic devices, reduce the use of signal lines, and design a single network bus to which all peripheral devices are connected. CAN bus has the advantages of high data transmission rate, strong anti-electromagnetic interference ability, high reliability, and perfect...

AI Technical Summary

Problems solved by technology

[0005] However, the inventors of the present disclosure have found that (1) the length of the remote control frame and its response frame is relatively fixed, and its form is single, which often cannot meet the diverse testing requirements of users; The time difference for sending the response frame) is required. Generally, the receiving end uploads the data to the host computer after receiving the request frame, and the host computer completes the response operation after corresponding judgment processing. This response mechanism sometimes cannot meet the needs of users for quick responses.

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