S3C2440的PWM输出驱动,可以输出频率可调的PWM方波以控制步进电机-The S3C2440 PWM output drive, the PWM square wave can be output frequency is adjustable to control the stepper motor

L6208步进电机驱动，可以正转动，反转，PWM更改速度控制，-L6208 stepper motor driver, you can now rotate, reverse, PWM speed control change

初始化PWM定时器0,按键及参数配置,步进电机运行模式控制等-Initialization PWM timer 0, key and parameter configuration, stepper motor operation mode control, etc.