real-time Ethernet design method based on a universal platform

Abstract

The invention relates to a real-time Ethernet design method based on a universal platform, and the method comprises the steps: carrying out the design of a time slot: carrying out the setting of a time interface of a system kernel on the basis of the synchronization of a network clock; Initializing a clock; specifying and using a maintenance function of a clock is specified for calculating and updating time slice data of a specified network event; performing Clock setting; Initializing a clock starting data structure; starting clock timing; The periodic transceiving design comprises the following steps: the network card driver adopts a kernel task queue and DMA data transmission mode, and uses an NAPI trigger mode in a matched manner; The real-time application layer protocol stack design comprises the step of using an open-source CANOPEN project as an application layer interface to realize a real-time protocol stack. According to the method based on the universal hardware platform, real-time Ethernet communication based on the universal hardware platform is achieved, the problem that a special chip must be used is solved, flexibility and development efficiency are improved, and cost is reduced.

Description

technical field [0001] The invention relates to computer network technology, in particular to a design method of real-time Ethernet based on a common platform. Background technique [0002] The research on real-time network abroad is earlier, and there are three mainstream high-real-time Ethernets: TTE, EtherCat and SERCOS. [0003] The investigation found that these three types of real-time Ethernet all need special-purpose chips to realize. One of the reasons why special-purpose chips are used is to control the market and users, so that the owner of the bus intellectual property rights is in a favorable position, so that it can be used at any time in the future. Can monopolize the market and control users. [0004] The research on real-time network in China is relatively late, and the main R&D units include the Communication Engineering Department of Xidian and the Software and Communication Department of Tsinghua University. And they are all aimed at specific needs, and...

AI Technical Summary

Problems solved by technology

Since the communication with foreign manufacturers must go through an intermediate agent, the efficiency of cooperation and communication is low

[0009] 3. Because foreign products often contain many additional services and functions, resulting in high prices, and these additional services and functions are often unnecessary

[0011] 5. Due to the use of dedicated chips and dedicated application layer protocols, the real-time networks of different manufacturers do not have interoperability