A Hardware And Driver Design Of Video Processing System Based On Processor TMS320DM642

With the development of the electronic technology, multimedia and signal processing technology, airplane devices are becoming smaller and the function is becoming multiplex. At the same time, because of the contact of many different devices, it is hard to design avionics systems which have high performance, small volume and good anti-jamming.Digital Video Recorder (DVR) is one of the devices in the Display Control Manager System (DCMS). Receiving, processing and recording various image of plane are the main function of DVR. This recorded image can help to analyze and evaluate the flight.Based on the requirement of the system, this paper has developed a video processing system using DSP of Texas Instruments (TI). LVDS technology, monitoring technology and digital video technology have been used in the system. It can be used in DVR, completing the video and audio data collection and processing. Studying and comparing some mature solutions , we choose the TMS320DM642 as the core of the video processing system design. The paper also gives a detailed presentation of how to complete the demarcation of the various functional modules. The hardware design of the TMS320DM642's interfaces have been introduced emphatically. The concrete hardware circuit and characteristics of elements are presented. At the same time, some problems in the PCB design and its solutions are introduced.This paper also introduces the system software development environment and the correlative driver designs. And it gives the video sampling module and the external memory module testing software OSS.