The Design Of Handheld Multimedia System Based On The Qt Embedded Linux System

The main content of this article is the complete handheld multimedia system design based on the Qt embedded Linux system. In this design, the operating system selected open source free and powerful network functions embedded Linux operating system; dedicated audio and video decoder chip hardware decoding audio and video playback capabilities to achieve, instead of using software decoding: Use open-source MPlayer to decode video files, to open source Madplay decode audio files; microprocessor chip selected high-bid letter of S3C2440Samsung ARM920T core, which integrates a variety of peripherals such as LCD controller controller, NAND Flash controller connected to the corresponding peripheral can be used, reducing development costs and increase the practicality of the design. In addition, due to the hardware circuit contains a USB interface and SD card interface and Linux-3.7.9has been added USB and SD card driver, so you can mount U disk and SD cards and other storage devices, to solve the the traditional handheld multimedia system equipment storage capacity fixed defects.Firstly, the need was analized and handheld multimedia system hardware circuit was introduced. And then build an embedded Linux software development environment, including uboot-2010.03transplantation, transplantation of Linux-3.7.9and JFFS2root file system of production, and add the required drivers in the Linux-3.7.9. Then, the installation of Qt Creator, Qt/Embeded transplantation, the tslib transplantation, madplay transplantation and MPlayer transplantation, the use Qt Creator integrated development environment handheld multimedia system interface design, TXT text browser, picture browsing, audio and video playback. Finally, the transplantation of U-Boot is programmed into the test, run the test S3C2440hardware platform designed handheld multimedia system applications.The tests show that the uboot-2010.03, Linux-3.7.9transplantation is successful, the application of the design in the S3C2440hardware platform successfully worked.