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步进电机驱动器设计中控制信号用到PUL+DIR及CW/CCW模式，这两种模式可否在DSP（TMS28032）的QEP模块实现并可切换？能否提供一些示例程序，如果该DSP不能实现，需要加什么样的外围电路呢，望回复。
看下编译器下自带例程，还有数据手册
