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.

mini2440 的驱动测试代码，包括c文件和Makefile-mini2440 appication program for test pwm module.

PIC16F1937的PWM信号原代码，驱动LED时，可以控制亮度-PIC16F1937 PWM signal the original code, the drive LED, you can control the brightness