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HVACI电机转速测量疑问



TI给的HVACI例程中,关于正交编码器部分测电机转速,在level3中开始出现,我现在没有通强电,只是纯粹为了验证电机转速检测,所以把其他的模块都注销的情况下,手动旋转电机,应该能看到转速变化的,为什么速度一直都是零啊?  (*eQEP[m]).QPOSCNT寄存器中的值一直为零,有没有谁对这个模块进行验证过啊?