A method for realizing high-speed single-bus communication

Abstract

The invention relates to an implement method for high speed single bus communication. Data double-way transmission is performed on basis of an SDI signal line, the SDI signal line is connected with a host and a slave, the host sends signals through the SDI signal line, the slave is automatically adapted to receiving rate and starting and stopping of communication according to the received signals so that a self adaption one wire (SAOW) host-slave structure is formed, data information is transmitted by means of a command frame structure in terms of the data double-way transmission, and a command frame comprises a frame header, a slave address, a register address, data length, data and a frame tail. By means of the implement method for high speed single bus communication, one-bus double-way communication can be achieved, two communication parties are not required to use fixed baud rate, the baud rate can be changed whenever possible, and the method can be applied to occasions with unstable working frequency.

Description

technical field [0001] The invention belongs to the field of communication protocols between chips, in particular to a method for realizing high-speed single-bus communication. Background technique [0002] As we all know, the communication buses commonly used between chips can be divided into parallel bus and serial bus, serial bus is divided into synchronous communication and asynchronous communication, synchronous communication such as SPI, I2C, etc., asynchronous communication protocols such as UART, 1-Wire, etc. Synchronous communication is generally considered to be faster than asynchronous communication. SPI is a standard designed by Motorola. It uses 4 lines (SDI, SDO, SCK, CS) to realize the communication process, and uses CS line to realize the selection of slaves; I2C bus is developed by PHILIPS to effectively realize the control between electronic devices. A simple bidirectional two-wire (SDA, SCL) bus was developed, using device addresses to distinguish differe...

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Problems solved by technology

[0005] It can be seen that for asynchronous communication, whether it is the UART protocol or the 1-Wire bus protocol, a relatively accurate clock is required to calculate the corresponding baud rate or delay, so the stability and accuracy of the system clock are all important. Higher requirements are put forward, which is unacceptable for consumer integrated circuit ICs where the current market competition is fierce

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