基于IIC的车载多联屏通信设计方案

The design scheme of vehicle multi-screen communication based on IIC

目前,汽车多联屏方案主机端和显示屏端的视频传输所依赖的是LVDS,控制信号和数据的传输则主要依赖于CAN或LIN通信。针对传统设计方案存在的问题,设计一种基于IIC的汽车多联屏通信设计方案。该方案利用主机端和显示屏端的视频加串和解串装置,对视频信号进行通信的同时,能够实现对基于IIC的数据和控制信号的通信,并利用加串器和解串器的硬件中断,解决IIC通讯的双向信息传递问题。在软件设计上,对基于IIC的数据信号和控制信号的传输格式进行优化,采用一定的校验算法提高数据传输的可靠性,且对于部分高速传输的数据通信增加缓冲机制,解决IIC通讯的延迟问题。此方案与传统方案相比,具有结构简单、成本低、信息传输速度快且可靠的特点。

In view of the current popular vehicle multi-screen scheme,the video transmission of the host and display side depends on LVDS,while the transmission of control signals and data mainly depends on CAN or LIN communication.Aiming at the problems existing in the traditional design scheme,this paper introduces a design scheme of multi-screen communication based on IIC.This scheme uses the video serializer and deserializer on the host end and the display end to communicate with the video signal,and also realizes the communication of the data and control signal based on IIC,and uses the hardware interrupt of the serializer and deserializer device to solve the problem of bidirectional information transmission in IIC communication.In terms of software design,this scheme optimizes the transmission format of data signal and control signal based on IIC,adopts certain calibration algorithm to improve the reliability of data transmission,and increases the buffering mechanism for some high-speed data communication,so as to solve the delay problem of IIC communication.Compared with traditional schemes,this scheme has the characteristics of simple structure,low cost,fast and reliable information transmission.