Communication method and device based on enhanced CAN bus protocol analyzer

Abstract

The invention discloses a communication method and device based on an enhanced CAN bus protocol analyzer. The method includes: a computer sends a test message to the enhanced CAN bus protocol analyzer; a feedback processing unit stores the test message and feeds back the same test message The computer receives the test message and compares it to confirm that the cable connection is correct; the internal ordinary CAN bus analyzer processes the test message, and then sends it to the feedback processing unit, and the feedback processing unit analyzes the test message again Compare and send the result to the computer, and the computer confirms that the transmission of the test message is correct; the computer sends data instructions to the feedback processing unit, and the feedback processing unit sends the data instructions to the internal ordinary CAN bus analyzer after receiving the data instructions, and the internal ordinary CAN bus After the analyzer receives the data instruction, it sends the instruction data to the target board to be tested. The invention realizes the real-time monitoring of the CAN bus transmission process and improves the testing efficiency.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a communication method and device based on an enhanced CAN bus protocol analyzer. Background technique [0002] CAN bus (field bus) communication is a serial communication method with differential input and output. Using this communication method, the fast information exchange of the bus in the industrial field can be completed. The CAN analyzer can be used to analyze the CAN high-level protocol. While obtaining CAN message information, it can help users quickly and accurately understand the status of the communication control terminal under test. [0003] CAN Analyzer can be used to send and receive analytical messages to help users locate problems in high-level protocols. It is commonly used in CAN-Bus network data, error status, network load, application layer protocols, or simulate the working status of CAN-Bus application terminals. [0004] The disadvantages of the e...

AI Technical Summary

Problems solved by technology

[0004] The disadvantages of the existing technology are: ① For different types of cables, the cable length and the external environment will have a certain impact on the CAN analyzer; ② Different communication interfaces need to be developed for different terminal controllers to be tested; ③ When using cables will When the CAN analyzer is connected to the computer and the board under test, sometimes the communication is not smooth due to equipment problems, and the communication interruption cannot be found only by software means, which makes it impossible to eliminate communication faults and realize the debugging of the terminal under test.

Images