Single-line digital communication interface based on AHB bus

Abstract

The invention discloses a single-line digital communication interface based on an AHB bus, and the single-line digital communication interface uses a half-duplex mode to realize networking communication between a host and a plurality of slaves. The single-line digital communication interface is composed of an AHB interface module and a data transceiving module. In the data transmission process, bytes are used as units, and unique starting and ending modes and a unique data frame format are achieved. Single-line transmission requires that all data communication must be carried out strictly according to a specified time sequence. In order to ensure the correctness of the data, CRC is used to check each frame of data, the data is used as an I / O port of a chip, and a filter module for filtering out burrs is also arranged, so that the stability and reliability of communication are finally ensured. Compared with other communication interfaces, the circuit is simple, I / O port resources are saved, and hardware cost is reduced. Meanwhile, the data of the interface can be configured by an AHB bus, and the state information of the interface can be read, so that the flexibility and the monitorability are relatively high.

Description

technical field [0001] The invention relates to an SOC single-line digital interface based on an AHB bus, which belongs to the technical field of data processing and can realize half-duplex single-line communication. Background technique [0002] Data communication is a new communication method combining communication technology and computer technology. To transmit information between two places, there must be a transmission channel. With the rapid development of semiconductor technology, SOC is getting larger and more complex, and serial communication interface technology has become the focus of the industry. It connects data terminals and computers through transmission channels, so that data terminals at different locations can share software, hardware and information resources, so it is widely used in modern industrial production and life. At present, various general serial communication interfaces are increasingly integrated into SoCs. Although there are a variety of c...

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Problems solved by technology

[0005] Aiming at the problem that there are multiple data lines and clock lines in the above-mentioned common serial communication interface, which leads to waste of resources, the present invention improves this, and realizes half-way communication between the host computer and one or more slave devices through only one common data line. duplex two-way communication

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