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instaSPIN-MOTION初始对齐时的转动方向问题

Other Parts Discussed in Thread: TMS320F28069M

TMS320F28069M,Instaspin-motion,PMSM,增量式编码器,速度控制,DRV830x-HC-C2-KIT驱动板,proj_lab12b例程。上电时,需要先进行电角度对齐,
对齐过程中电机的旋转方向是随机的,有可能正转对齐到某一极对,也有可能反转到对齐另一个极对,有办法控制电角度对齐时转动的方向吗?