CAN bus communication monitoring analyzer

Abstract

The invention relates to a CAN bus communication monitoring analyzer, which comprises a power supply module, a single chip, a small keyboard, an LCD, a CAN bus interface, a PS / 2 interface and an RS232 interface. The monitoring analyzer is connected with a monitored CAN network through the CAN bus interface and used for analyzing the problem of the CAN network during communication; working parameters of the monitoring analyzer can be set through the small keyboard so that the monitoring analyzer is matched with different CAN networks; the LCD can display the information mutually transmitted between different nodes in the network in real time; and a universal computer keyboard externally connected at the PS / 2 interface can conveniently realize edition of various commands or data and send the various commands or the data to the network so as to fulfill the purposes that the monitoring analyzer simulates a specific node and sends the data to the CAN network.

Description

technical field [0001] The invention relates to a CAN bus communication monitoring analyzer, in particular to a CAN bus communication monitoring analyzer with a PS / 2 interface, which can realize communication "listening" and "speaking" functions. Background technique [0002] CAN (Controller Local Network) bus is a serial data communication protocol developed by German BOSCH company in the early 1980s to solve the data exchange between numerous control and test instruments in modern automobiles. It is a multi-master bus , The communication medium can be twisted pair, coaxial cable or optical fiber. The communication rate can reach 1MBPS. Due to its high performance, high reliability, real-time and other advantages, it has been widely used in many fields such as industrial automation, transportation, medical equipment, construction, and environmental control. The controller local network has also been widely used in our country in recent years, but the development and debug...

AI Technical Summary

Problems solved by technology

[0004] Emulator debugging method: When a node has a problem, run the program of the node through the emulator, and find the problem by setting breakpoints and observing related variables. The disadvantage of this method is that the emulator cannot Realistically simulate all the characteristics of the single-chip microcomputer. When observing variables, it is necessary to stop the operation of the program so that the entire operation process is discontinuous. The emulator is inconvenient to use in the industrial field.

There are mainly two types of analyzers currently on the market. 1. Dedicated CAN communication network analyzers. This type of analyzer must be connected to a PC when it works, and it depends on the host computer program and storage function running on the PC to work normally; 2. Simple CAN communication network analyzer, this type of analyzer focuses on realizing the recording and tracking of network communication data, and lacks the function of simulating specific nodes to actively send information to the network

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