Architecture for realizing dual-screen interconnection of vehicle-mounted entertainment system and instrument through SPI channel in an FPD-Link III

Abstract

The invention relates to architecture for realizing dual-screen interconnection of a vehicle-mounted entertainment system and an instrument through an SPI channel in an FPD-Link III. The architecturecomprises a vehicle-mounted entertainment processor, an instrument processor, an SPI controller of a vehicle-mounted entertainment system side, an SPI controller of an instrument side, an FPD-Link IIIwiring harness, a LVDS encoder DS90UB949 and a LVDS deserializer DS90UB940, the SPI controller of the vehicle-mounted entertainment system side is connected with the vehicle-mounted entertainment processor, the LVDS encoder DS90UB949 is connected with the SPI controller of the vehicle-mounted entertainment system side, the SPI controller of the instrument side is connected with the instrument processor, the LVDS deserializer DS90UB940 is connected with the SPI controller of the instrument side, and the LVDS encoder DS90UB949 and the LVDS deserializer DS90UB940 are connected through the FPD-Link III wiring harness. The architecture can effectively meet the rapid transmission of application data, pictures, texts and other information during the dual-screen interconnection of the vehicle-mounted entertainment system and the instrument, and ensure the instantaneity of user operation response.

Description

technical field [0001] The invention belongs to the technical field of automotive electronics, and in particular relates to a structure for realizing dual-screen interconnection between a vehicle entertainment system and a large-screen or full liquid crystal instrument, in particular to a method for realizing The architecture of dual-screen interconnection between the car entertainment system and the instrument. Background technique [0002] With the continuous development of the automobile industry, the functions of the car instrument and the car entertainment system are becoming more and more abundant, and the demand for information interaction between the two is also increasing, especially the data information in the car entertainment system is transmitted to the instrument. to display. In the prior art, LVDS and IIC signal lines are usually set between the car entertainment system and the instrument, so that the car entertainment system can transmit video through the LV...

AI Technical Summary

Problems solved by technology

However, in this way, the picture transmission rate of the IIC signal line cannot meet the speed of song switching, and when the song is switched, information such as pictures related to the song cannot follow the switch in time

In addition, the transmission rate of the IIC signal line is relatively low. For example, when a 20KB picture (20*8=160Kb) is transmitted at the common 100Kb/s rate of the IIC signal line, it takes about 160/100=1.6s, and, If the data verification error in the IIC signal line is requested to be resent, the transmission time will be doubled

However, when the song is switc

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