pwm驱动程序，可以驱动s5pc100开发板，通过设置不同的占空比和频率来播放音乐。-pwm drivers can drive s5pc100 development board, by setting different duty cycle and frequency to play music.

调节笔记本LCD的PWM频率，可以做到不闪屏-To set LCD brightness and PWM,it is useful for eye!