基于STM32F103的MP3播放器完整项目源代码，包括原理图，绝好的资料########################################################################## MP3_player.eww## $Revision: 23482 $#########################################################################DESCRIPTION===========This example project shows how to use the IAR Embedded Workbench for ARMto develop code for the IAR STM32-SK evaluation boards and MOD-MP3 module. It implements a MP3 player. The MOD-MP3 module must be connected to the UEXT connector of the IAR STM32-SK board. The player can read MMC/SD media formatting under FAT12/16/32 file system.COMPATIBILITY=============The project is compatible with the IAR IAR STM32-SK evaluation board and MOD-MP3module.The project is by default configured to use the J-Link JTAG interface.CONFIGURATION=============The application is downloaded to the flash.Jumpers:PWR_SEL - depending of power sourceButtons: B1 - Next a file/dir (select mode) B1 - Sound effects None, Wide Stereo, Loudness (play mode) B2 - Enter/exit form directory or Play/StopPotentiometers: AN_TR - volume controlGETTING STARTED=============== 1) Start the IAR Embedded Workbench for ARM. 2) Select File->Open->Workspace... Open the following workspace: installation-root>\arm\examples\ST\STM32F10x\ IAR-STM32-SK\MP3_player\MP3_player.eww 3) Run the program.……