The Software Design And Implement Of MP3 Digital Audio-frequency Playing System Based On ARM

With the development of ultra-large-scale integrated circuits and digital electronic technology, MP3 as the representative consumer of the electronics products are widely used in our daily life. Digital Audio Technology achieves a considerable development, in which ARM technology is one of the hot one currently. Compared with the traditional digital products, the one by using of ARM technology has its own features. Combining ARM microprocessors and operating systems, MP3 Player Digital Audio processing is more flexible and Performance Optimization is more modified, furthermore, the whole system function is more comprehensive. On the basis of the two advanced technology-- Digital Audio Technology and ARM Embedded System, as well as SG850 microprocessor as the core, the present study puts forward the solutions of MP3 digital audio playing system embedded by ARM.Regarding the design and implementation process of MP3 Digital Audio playing System software based on the ARM Embedded as the main content, this paper describes the related technologies and its specific processes, in which focuses on the analysis of the transplantation of the uC/OS-II operating system and the undertaken process of USB Communication on the foundation of this system as well as the manipulation process of MP3 player. In the transplantation of operating system, based on the study of uC/OS-II kernel mechanism, the present study analyzes the code documents related with the Processing equipment and makes the relevant amendments which providing the specific steps of the transplantation of uC/OS-II. In USB communication, regarding the broadcast system as mass storage devices, by the utility of transmission equipment of BULK_ONLY, it achieves the agreement with the host USB communication. Moreover, this study has resolved the problem of the loss of data transmission by the usage of Flash memory management mechanisms. In MP3 player disposal, this thesis investigates the DMA memory management mechanisms and designs the double-buffer mode, which proposes the treatment process of MP3 player and achieves the playing of a large volume of audio data.This paper indicates that, the achievement of MP3 audio playing system is the practical products are obtained the desired goals. Meanwhile, as the technical superiority of the system's construction, the system can easily expand the functionality.