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1、摘要Cortex-M3是ARM公司为要求高性能(1.25DhrystoneMIPS/MHz)、低成本、低功耗的嵌入式应用专门设计的内核。STM32系列产品得益于Cortex-M3在架构上进行的多项改进，包括提升性能的同时又提高了代码密度的Thumb-2指令集和大幅度提高中断响应的紧耦合嵌套向量中断控制器，所有新功能都同时具有业界最优的功耗水平。本系统是基于Cortex-M3内核的STM32微控制器的mp3播放器，在硬件方面主要有VS1053硬件音频解码器和12864点阵液晶屏，在软件方面主要有VS1053的驱动，SD卡工作
2、在SPI模式下的读写驱动，FAT文件系统的移植，12864液晶的驱动，嵌入式操作系统ucOSii的移植以及嵌入式图形管理器ucGUI的移植。整个设计过程包括电子系统的设计技术及调试技术，包括需求分析，原理图的绘制，pcb板的绘制，制版，器件采购，安装，焊接，硬件调试，软件模块编写，软件模块测试，系统整体测试等整个开发调试过程。关键词：STM32，VS1053，FAT文件系统，12864液晶，ucOSii，ucGUIAbstractCortex-M3areARMcompaniesthatrequirehighperforma
3、nce(1.25DhrystoneMIPS/MHz),low-cost,low-powerembeddedapplicationsspeciallydesignedcore.STM32familybenefitsfromtheCortex-M3architectureatonanumberofimprovements,includingupgradingtheperformanceandatthesametimeimprovethecodedensityoftheThumb-2instructionsetandinterr
4、uptresponsesignificantlyimprovethetightlycouplednestedvectorinterruptcontroller,Allnewfeaturesareatthesametimetheoptimalpowerconsumptionleveloftheindustry.ThesystemisbasedontheCortex-M3coreSTM32microcontrollermp3player,mainlyinhardwarehaveVS1053hardwareaudiodecode
5、rand12864dotmatrixLCDscreen,mainlyinthesoftwaredriverVS1053has,SDcardworkintheSPImodetoreadandwritedrive,FATfilesystemofthetransplant,12864LCDdrivers,embeddedoperatingsystemandembeddeducOSiitransplantgraphicsmanagerucGUItransplant.Theentiredesignprocessincludingth
6、edesignofelectronicsystemstechnologyanddebuggingtechniques,includingneedsanalysis,mappingprinciple,pcbdrawingboard,platemaking,deviceprocurement,installation,welding,hardwaredebugging,preparationofsoftwaremodules,softwaremoduletesting,overallsystemtestingthroughou
7、tthedevelopmentprocess.KEYWORDSSTM32，VS1053，fatfilesystem，12864dotmatrixLCDscreen，ucOSii,ucGUI2目录1.系统描述......................................................................51.1综述.....................................................................51.2系统框图........
8、..........................................................51.3功能实现..................................................................52.硬件设计.............
