TTP/C communication node implementation method compatible with Ethernet communication

Abstract

The invention discloses a TTP / C communication node implementation method compatible with Ethernet communication, and belongs to the technical field of real-time communication. The method comprises the following steps: firstly, designing a compatible layer comprising a virtual network interface layer, a semantic layer and a link control layer; then, simultaneously realizing a TTP / C communication protocol stack and an Ethernet communication protocol stack which are logically independent on a development board platform, and enabling the two protocol stacks to interact with the compatible layer through the virtual network interface; then, enabling the two protocol stacks to respectively send and store an Ethernet frame and a TTP / C frame; after the compatible layer detects the TTP / C frame, starting mixing of the Ethernet frame and the TTP / C frame, and when it is monitored that a signal comes, enabling a sending end of the compatible layer to send the mixed frame; enabling the Ethernet communication protocol stack to capture and intercept a receiving timestamp in combination with an independent clock module, packing and sending the timestamp and the mixed frame, and enabling a compatible layer receiving end to analyze the mixed frame and send the analyzed mixed frame to the two protocol stacks. According to the method, communication with different time criticality can be coordinated by inserting the compatible layer between the protocol stacks and NIC equipment.

Description

technical field [0001] The invention belongs to the field of real-time communication, in particular to a method for realizing a TTP / C communication node compatible with Ethernet communication. Background technique [0002] In recent years, with the development of the embedded field, CPS (cyber-physical system) has been proposed. As an extension of traditional embedded systems, CPS integrates computing, control and communication, and combines computing resources and physical environments to realize human, Interaction between machine and environment. The main application scenarios of CPS are concentrated in relatively complex fields such as automotive electronics, aerospace or industrial automation, which often require hard real-time control system support, and have high requirements for the reliability and security of the control system. [0003] TTA (time-triggered architecture) provides a general design framework for this hard real-time, high-reliability, and high-security...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the defects of strong dependence on special equipment and difficult deployment in the existing time-triggered communication protocol and Ethernet communication protocol compatibility scheme, the present invention proposes a TTP / C communication node implementation method compatible with Ethernet communication , the communication nodes can be deployed on the common development board, and the common Ethernet communication equipment can be used to realize the compatibility of the TTP / C common protocol and the Ethernet communication protocol, and the communication with different time criticality can be coordinated through the compatibility layer, and the highest time is ensured. On the premise that the key communication semantics are intact, other communication should be scheduled as much as possible

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