基于/dev/dsp编写的嵌入式Linux录音放音(IIS接口，也可以直接放PCM)程序，可以使用交叉编译工具编译下载到开发板运行。 -Based on/dev/dsp written recording and playback of embedded Linux (IIS interface, you can directly put PCM) program, you can use the cross compiler tool to compile downloaded to t