将11520采样率(可用cooledit得到)的wav文件转换为可供串口播放的PWM文件，用windows的超级终端或者串口调试器发送到串口便可以用接在串口TxD和GND之间的喇叭听到-sampling rate of 11,520 (cooledit be available) to wav file conversion for serial PWM broadcast documents, with the Super Terminal windows or serial debugging sent to the serial device can be used in access Serial TxD and GND hear the horn