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LAUNCHXL-F28069M: InstaSPIN-Motion位置环是不是不需要Z相TTL脉冲?

Part Number: LAUNCHXL-F28069M

lab13b例程中开源出来代码部分,仔细看了下,我只找到从QEP中获取qep->QPOSCNT寄存器值;

都没有获取Z相清零信号;

我硬件上把编码器Z相信号拔掉了,位置环控制依然能跑起来;

这是怎么回事呢?