Lower computer architecture and hardware real-time query method of CANFD bus database

Abstract

The invention discloses a lower computer architecture and a hardware real-time query method of a CANFD bus database. The lower computer comprises a CAN FD transceiver, a CAN FD bus database in a Jsonformat, a Json analyzer, a message parser and a message packager. The Json analyzer generates a sending message definition and a receiving signal definition by analyzing the Json format CAN FD bus database file. The message parser parses the CAN FD transceiver message according to the definition of the received signal, and establishes all received CAN FD message lists. The message packager definesan automatic packaging signal as a message according to the sent message, the packaged message is sent to the CAN FD bus through the CAN FD transceiver, and all CAN FD message lists needing to be sent by the CAN FD transceiver are established. The CAN FD bus data storage and access problem is solved, a simple and easy-to-analyze CAN FD bus database format is constructed, a lower computer can automatically read a database file, a message received from a bus is analyzed in real time, and a message required to be sent in the database file is automatically sent.

Description

technical field [0001] The invention relates to the technical field of computer hardware, in particular to a lower computer architecture and a hardware real-time query method for a CANFD bus database. Background technique [0002] The existing CAN FD bus databases are all relational databases designed based on the host computer PC, or CAN FD databases based on proprietary file formats. A relational database usually consists of several tables, such as signal table, message table and node table. The signal table contains the definitions of all signals in the network, including fields such as signal name, signal length, byte order, maximum value, minimum value, amplification factor, offset, unit, and comment; the message table contains all possible signals in the network. Message definition, each message contains the corresponding signal, the definition of these signals can be found in the signal table; the node table contains the definition of all nodes in the entire network,...

AI Technical Summary

Problems solved by technology

[0004] 1. Although the CAN FD bus database based on the relational database is convenient to implement, it needs CAN FD network monitoring and simulation software to integrate the database engine; the CAN FD bus database based on the proprietary file format often requires CAN FD network monitoring and simulation program to integrate complex file analysis program; the above methods will lead to the complexity of the host computer software;

[0005] 2. Due to the complexity of the database engine or file analysis program, it is difficult to transplant to the lower computer program, so it is often necessary to write different CAN FD message sending and receiving analysis programs for different CAN FD networks, which increases the software development of the lower computer and test complexity;

[0006] 3. When the CAN FD network database changes, such as adding or deleting some signals or messages, it is often necessary to rewrite the CAN FD message sending and receiving analysis program of the lower computer program, which makes it difficult to cope with frequent change requirements

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