| With the opening and reform deeply, the constantly Exhibition Organizers flourished, from exhibition environment and facilities, scale and influence in Asia, medium-small has became the exhibition superpower, exhibition has activitied into a service industry of a new window, even became some of the city's pillar industries and promoted regional economic development of new economic growth point. For all the staff can communicate with each other timely and effective to understand each exhibition exhibits correlation data in the large exhibition, so good speech broadcast system will be needed. Currently MP3 player because its broadcast timbre, and high reliability, convenient operation and other characteristics, which began in exhibition broadcast system application.Ordinary MP3 player storage medium single, capacity small, simple function, need to undertake special design can satisfy exhibition broadcast system requirements.Therefore according to the current audio technology development and large-scale exhibitions on speech broadcast needs, large-scale exhibitions intelligent MP3 system should have very flexible and universality and practicality.Based on this objective, this paper designed a style, GPL162003A processor based on with embedded operating system of intelligent MP3 system,The design of the system provides the USB interface, SD card interface, can connect different storage devices, broke through the capacity of the restrictions; Can provide convenient speech, high quality broadcasts download speech; With PC editing system, can control of linkage equipment, in order to achieve better organization exhibition the purpose of the work.This paper first introduced the large-scale exhibitions intelligent MP3 system, then the characteristics of the function of the system are analyzed in detail the needs and to achieve after performance indicators, the President of the system are given with the design scheme on the base.Then this paper discusses the large-scale exhibitions intelligent MP3 system hardware design and implementation, and hardware structure of the system were given for each child module: GPL162003A basic circuit, memory circuits, audio circuits, real-time clock and GPS reset circuit, electrical equipment control circuit, the power circuit design in detail.Then this paper discusses inμC/OS - II GPL162003A the transplant process on. Then an intelligent MP3 system software design and implementation,System main task modules are: MP3 decoding broadcast module, the keyboard module, LCD module, USB communication module, SD cartoon module, the clock reset module, Infrared remote control module software programming ideas, processes and part of the program.The project has producted a prototype and a series of test and the corresponded analysis in the basis of achievement of soft design, designed by commissioning experiments demonstrate that the large-scale exhibitions intelligent MP3 system each function can meet the requirement of design, can achieve expected design goal. |
