Design Of Embedded Multimedia Terminal Based On Linux

The rapid development of mobile Internet changed people’s way of life that humaninto entered a new era of information. As the the themes of The Times, pictures, text,audio, video, data and multimedia communication, combining enriched people’sinformation life. Embedded multimedia terminal equipment is multimedia communicationsystem is an indispensable part of, its powerful function, convenient use, make it become afield of research hot spot. Multimedia terminal such as now commonly used intelligentmobile phone, tablet PC, it is a kind of integration of various media can set the video andmusic, entertainment, calls, office and computing applications such as a newcommunication terminal. From the point of view of the system, multimedia terminalproduct development mainly involves media processing technology, storage technology,communication technology and display technology.On the analysis of the mainstream on market now multimedia digital terminalequipment and on the basis of embedded technology, the design gives a kind of embeddedmultimedia terminal, this paper puts forward the multimedia terminal equipment of thespecific software and hardware architecture. Choose to ARM9as the core of the SamsungS3C2440A microprocessor system as the main control chip. In the master control chip,based on the current embedded multimedia terminal equipment of a variety of functionalrequirements, given the general framework of the system hardware, the peripheral chipselection, design the system terminal whole hardware solutions, the S3C2440A processorchip pin resources specific distribution, detailed design the master control chip minimumsystem circuit and peripheral memory, liquid crystal display module, touch screen module,SDRAM chip, audio decoder chip and card chip connection circuit.In building hardware platform based on the embedded Linux operating systemtransplantation, the paper will be embedded Linux system transplanted into the system of the specific method, analyzed the construction of hybrid file system, and gives theBootLoader transplantation, Linux kernel transplantation and file system transplantationconcrete realization method.In the embedded Linux operating system transplantation on the basis of the peripheralchip driver development, the article makes an embedded Linux drive structure anddevelopment of the general process. Specifically given memory NAND Flash, LCD andtouch screen module, SDRAM, audio chips and card chip and peripheral chip driverdevelopment design.