可以通过这个制作一台mp3播放器的全套代码，包括arm的启动过程，控制codec aic23的全套过程-through the production of a mp3 player is the set of codes, including the arm of the startup process. aic23 control codec is the set of process

bf533 spi启动代码，加载后运行后，不断从向串口发出字符“8”，可用超级终端接受。-bf533 spi bootcode, the loading operation, constantly sent from the serial port to the characters "8" available for the Super Terminal.