将此文件解压缩，会得到一个"ip"目录，将此目录放入你的项目中，就可以在sopc中import到一个叫pwm的组建了。解压缩还会得到一个C语言文件，它是与硬件配合的Nios2_C代码 -Extract this file will get an " ip" directory into this directory in your project, you can import into the sopc in the formation of a called pwm.